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| |
| #include "qimage.h" |
| |
| #include "qbuffer.h" |
| #include "qdatastream.h" |
| #include "qcolortransform.h" |
| #include "qmap.h" |
| #include "qmatrix.h" |
| #include "qtransform.h" |
| #include "qimagereader.h" |
| #include "qimagewriter.h" |
| #include "qstringlist.h" |
| #include "qvariant.h" |
| #include "qimagepixmapcleanuphooks_p.h" |
| #include <qpa/qplatformintegration.h> |
| #include <private/qguiapplication_p.h> |
| #include <ctype.h> |
| #include <stdlib.h> |
| #include <limits.h> |
| #include <qpa/qplatformpixmap.h> |
| #include <private/qcolortransform_p.h> |
| #include <private/qdrawhelper_p.h> |
| #include <private/qmemrotate_p.h> |
| #include <private/qimagescale_p.h> |
| #include <private/qsimd_p.h> |
| |
| #include <qhash.h> |
| |
| #include <private/qpaintengine_raster_p.h> |
| |
| #include <private/qimage_p.h> |
| #include <private/qfont_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| static inline bool isLocked(QImageData *data) |
| { |
| return data != 0 && data->is_locked; |
| } |
| |
| #if defined(Q_CC_DEC) && defined(__alpha) && (__DECCXX_VER-0 >= 50190001) |
| #pragma message disable narrowptr |
| #endif |
| |
| |
| #define QIMAGE_SANITYCHECK_MEMORY(image) \ |
| if ((image).isNull()) { \ |
| qWarning("QImage: out of memory, returning null image"); \ |
| return QImage(); \ |
| } |
| |
| |
| static QImage rotated90(const QImage &src); |
| static QImage rotated180(const QImage &src); |
| static QImage rotated270(const QImage &src); |
| |
| static int next_qimage_serial_number() |
| { |
| static QBasicAtomicInt serial = Q_BASIC_ATOMIC_INITIALIZER(0); |
| return 1 + serial.fetchAndAddRelaxed(1); |
| } |
| |
| QImageData::QImageData() |
| : ref(0), width(0), height(0), depth(0), nbytes(0), devicePixelRatio(1.0), data(0), |
| format(QImage::Format_ARGB32), bytes_per_line(0), |
| ser_no(next_qimage_serial_number()), |
| detach_no(0), |
| dpmx(qt_defaultDpiX() * 100 / qreal(2.54)), |
| dpmy(qt_defaultDpiY() * 100 / qreal(2.54)), |
| offset(0, 0), own_data(true), ro_data(false), has_alpha_clut(false), |
| is_cached(false), is_locked(false), cleanupFunction(0), cleanupInfo(0), |
| paintEngine(0) |
| { |
| } |
| |
| /*! \fn QImageData * QImageData::create(const QSize &size, QImage::Format format) |
| |
| \internal |
| |
| Creates a new image data. |
| Returns \nullptr if invalid parameters are give or anything else failed. |
| */ |
| QImageData * QImageData::create(const QSize &size, QImage::Format format) |
| { |
| if (size.isEmpty() || format == QImage::Format_Invalid) |
| return nullptr; // invalid parameter(s) |
| |
| int width = size.width(); |
| int height = size.height(); |
| int depth = qt_depthForFormat(format); |
| auto params = calculateImageParameters(width, height, depth); |
| if (!params.isValid()) |
| return nullptr; |
| |
| QScopedPointer<QImageData> d(new QImageData); |
| |
| switch (format) { |
| case QImage::Format_Mono: |
| case QImage::Format_MonoLSB: |
| d->colortable.resize(2); |
| d->colortable[0] = QColor(Qt::black).rgba(); |
| d->colortable[1] = QColor(Qt::white).rgba(); |
| break; |
| default: |
| break; |
| } |
| |
| d->width = width; |
| d->height = height; |
| d->depth = depth; |
| d->format = format; |
| d->has_alpha_clut = false; |
| d->is_cached = false; |
| |
| d->bytes_per_line = params.bytesPerLine; |
| d->nbytes = params.totalSize; |
| d->data = (uchar *)malloc(d->nbytes); |
| |
| if (!d->data) |
| return nullptr; |
| |
| d->ref.ref(); |
| return d.take(); |
| } |
| |
| QImageData::~QImageData() |
| { |
| if (cleanupFunction) |
| cleanupFunction(cleanupInfo); |
| if (is_cached) |
| QImagePixmapCleanupHooks::executeImageHooks((((qint64) ser_no) << 32) | ((qint64) detach_no)); |
| delete paintEngine; |
| if (data && own_data) |
| free(data); |
| data = 0; |
| } |
| |
| #if defined(_M_ARM) |
| #pragma optimize("", off) |
| #endif |
| |
| bool QImageData::checkForAlphaPixels() const |
| { |
| bool has_alpha_pixels = false; |
| |
| switch (format) { |
| |
| case QImage::Format_Mono: |
| case QImage::Format_MonoLSB: |
| case QImage::Format_Indexed8: |
| has_alpha_pixels = has_alpha_clut; |
| break; |
| case QImage::Format_Alpha8: |
| has_alpha_pixels = true; |
| break; |
| case QImage::Format_ARGB32: |
| case QImage::Format_ARGB32_Premultiplied: { |
| const uchar *bits = data; |
| for (int y=0; y<height && !has_alpha_pixels; ++y) { |
| uint alphaAnd = 0xff000000; |
| for (int x=0; x<width; ++x) |
| alphaAnd &= reinterpret_cast<const uint*>(bits)[x]; |
| has_alpha_pixels = (alphaAnd != 0xff000000); |
| bits += bytes_per_line; |
| } |
| } break; |
| |
| case QImage::Format_RGBA8888: |
| case QImage::Format_RGBA8888_Premultiplied: { |
| const uchar *bits = data; |
| for (int y=0; y<height && !has_alpha_pixels; ++y) { |
| uchar alphaAnd = 0xff; |
| for (int x=0; x<width; ++x) |
| alphaAnd &= bits[x * 4+ 3]; |
| has_alpha_pixels = (alphaAnd != 0xff); |
| bits += bytes_per_line; |
| } |
| } break; |
| |
| case QImage::Format_A2BGR30_Premultiplied: |
| case QImage::Format_A2RGB30_Premultiplied: { |
| const uchar *bits = data; |
| for (int y=0; y<height && !has_alpha_pixels; ++y) { |
| uint alphaAnd = 0xc0000000; |
| for (int x=0; x<width; ++x) |
| alphaAnd &= reinterpret_cast<const uint*>(bits)[x]; |
| has_alpha_pixels = (alphaAnd != 0xc0000000); |
| bits += bytes_per_line; |
| } |
| } break; |
| |
| case QImage::Format_ARGB8555_Premultiplied: |
| case QImage::Format_ARGB8565_Premultiplied: { |
| const uchar *bits = data; |
| const uchar *end_bits = data + bytes_per_line; |
| |
| for (int y=0; y<height && !has_alpha_pixels; ++y) { |
| uchar alphaAnd = 0xff; |
| while (bits < end_bits) { |
| alphaAnd &= bits[0]; |
| bits += 3; |
| } |
| has_alpha_pixels = (alphaAnd != 0xff); |
| bits = end_bits; |
| end_bits += bytes_per_line; |
| } |
| } break; |
| |
| case QImage::Format_ARGB6666_Premultiplied: { |
| const uchar *bits = data; |
| const uchar *end_bits = data + bytes_per_line; |
| |
| for (int y=0; y<height && !has_alpha_pixels; ++y) { |
| uchar alphaAnd = 0xfc; |
| while (bits < end_bits) { |
| alphaAnd &= bits[0]; |
| bits += 3; |
| } |
| has_alpha_pixels = (alphaAnd != 0xfc); |
| bits = end_bits; |
| end_bits += bytes_per_line; |
| } |
| } break; |
| |
| case QImage::Format_ARGB4444_Premultiplied: { |
| const uchar *bits = data; |
| for (int y=0; y<height && !has_alpha_pixels; ++y) { |
| ushort alphaAnd = 0xf000; |
| for (int x=0; x<width; ++x) |
| alphaAnd &= reinterpret_cast<const ushort*>(bits)[x]; |
| has_alpha_pixels = (alphaAnd != 0xf000); |
| bits += bytes_per_line; |
| } |
| } break; |
| case QImage::Format_RGBA64: |
| case QImage::Format_RGBA64_Premultiplied: { |
| uchar *bits = data; |
| for (int y=0; y<height && !has_alpha_pixels; ++y) { |
| for (int x=0; x<width; ++x) { |
| has_alpha_pixels |= !(((QRgba64 *)bits)[x].isOpaque()); |
| } |
| bits += bytes_per_line; |
| } |
| } break; |
| |
| case QImage::Format_RGB32: |
| case QImage::Format_RGB16: |
| case QImage::Format_RGB444: |
| case QImage::Format_RGB555: |
| case QImage::Format_RGB666: |
| case QImage::Format_RGB888: |
| case QImage::Format_BGR888: |
| case QImage::Format_RGBX8888: |
| case QImage::Format_BGR30: |
| case QImage::Format_RGB30: |
| case QImage::Format_Grayscale8: |
| case QImage::Format_Grayscale16: |
| case QImage::Format_RGBX64: |
| break; |
| case QImage::Format_Invalid: |
| case QImage::NImageFormats: |
| Q_UNREACHABLE(); |
| break; |
| } |
| |
| return has_alpha_pixels; |
| } |
| #if defined(_M_ARM) |
| #pragma optimize("", on) |
| #endif |
| |
| /*! |
| \class QImage |
| |
| \inmodule QtGui |
| \ingroup painting |
| \ingroup shared |
| |
| \reentrant |
| |
| \brief The QImage class provides a hardware-independent image |
| representation that allows direct access to the pixel data, and |
| can be used as a paint device. |
| |
| Qt provides four classes for handling image data: QImage, QPixmap, |
| QBitmap and QPicture. QImage is designed and optimized for I/O, |
| and for direct pixel access and manipulation, while QPixmap is |
| designed and optimized for showing images on screen. QBitmap is |
| only a convenience class that inherits QPixmap, ensuring a |
| depth of 1. Finally, the QPicture class is a paint device that |
| records and replays QPainter commands. |
| |
| Because QImage is a QPaintDevice subclass, QPainter can be used to |
| draw directly onto images. When using QPainter on a QImage, the |
| painting can be performed in another thread than the current GUI |
| thread. |
| |
| The QImage class supports several image formats described by the |
| \l Format enum. These include monochrome, 8-bit, 32-bit and |
| alpha-blended images which are available in all versions of Qt |
| 4.x. |
| |
| QImage provides a collection of functions that can be used to |
| obtain a variety of information about the image. There are also |
| several functions that enables transformation of the image. |
| |
| QImage objects can be passed around by value since the QImage |
| class uses \l{Implicit Data Sharing}{implicit data |
| sharing}. QImage objects can also be streamed and compared. |
| |
| \note If you would like to load QImage objects in a static build of Qt, |
| refer to the \l{How to Create Qt Plugins}{Plugin HowTo}. |
| |
| \warning Painting on a QImage with the format |
| QImage::Format_Indexed8 is not supported. |
| |
| \tableofcontents |
| |
| \section1 Reading and Writing Image Files |
| |
| QImage provides several ways of loading an image file: The file |
| can be loaded when constructing the QImage object, or by using the |
| load() or loadFromData() functions later on. QImage also provides |
| the static fromData() function, constructing a QImage from the |
| given data. When loading an image, the file name can either refer |
| to an actual file on disk or to one of the application's embedded |
| resources. See \l{The Qt Resource System} overview for details |
| on how to embed images and other resource files in the |
| application's executable. |
| |
| Simply call the save() function to save a QImage object. |
| |
| The complete list of supported file formats are available through |
| the QImageReader::supportedImageFormats() and |
| QImageWriter::supportedImageFormats() functions. New file formats |
| can be added as plugins. By default, Qt supports the following |
| formats: |
| |
| \table |
| \header \li Format \li Description \li Qt's support |
| \row \li BMP \li Windows Bitmap \li Read/write |
| \row \li GIF \li Graphic Interchange Format (optional) \li Read |
| \row \li JPG \li Joint Photographic Experts Group \li Read/write |
| \row \li JPEG \li Joint Photographic Experts Group \li Read/write |
| \row \li PNG \li Portable Network Graphics \li Read/write |
| \row \li PBM \li Portable Bitmap \li Read |
| \row \li PGM \li Portable Graymap \li Read |
| \row \li PPM \li Portable Pixmap \li Read/write |
| \row \li XBM \li X11 Bitmap \li Read/write |
| \row \li XPM \li X11 Pixmap \li Read/write |
| \endtable |
| |
| \section1 Image Information |
| |
| QImage provides a collection of functions that can be used to |
| obtain a variety of information about the image: |
| |
| \table |
| \header |
| \li \li Available Functions |
| |
| \row |
| \li Geometry |
| \li |
| |
| The size(), width(), height(), dotsPerMeterX(), and |
| dotsPerMeterY() functions provide information about the image size |
| and aspect ratio. |
| |
| The rect() function returns the image's enclosing rectangle. The |
| valid() function tells if a given pair of coordinates is within |
| this rectangle. The offset() function returns the number of pixels |
| by which the image is intended to be offset by when positioned |
| relative to other images, which also can be manipulated using the |
| setOffset() function. |
| |
| \row |
| \li Colors |
| \li |
| |
| The color of a pixel can be retrieved by passing its coordinates |
| to the pixel() function. The pixel() function returns the color |
| as a QRgb value indepedent of the image's format. |
| |
| In case of monochrome and 8-bit images, the colorCount() and |
| colorTable() functions provide information about the color |
| components used to store the image data: The colorTable() function |
| returns the image's entire color table. To obtain a single entry, |
| use the pixelIndex() function to retrieve the pixel index for a |
| given pair of coordinates, then use the color() function to |
| retrieve the color. Note that if you create an 8-bit image |
| manually, you have to set a valid color table on the image as |
| well. |
| |
| The hasAlphaChannel() function tells if the image's format |
| respects the alpha channel, or not. The allGray() and |
| isGrayscale() functions tell whether an image's colors are all |
| shades of gray. |
| |
| See also the \l {QImage#Pixel Manipulation}{Pixel Manipulation} |
| and \l {QImage#Image Transformations}{Image Transformations} |
| sections. |
| |
| \row |
| \li Text |
| \li |
| |
| The text() function returns the image text associated with the |
| given text key. An image's text keys can be retrieved using the |
| textKeys() function. Use the setText() function to alter an |
| image's text. |
| |
| \row |
| \li Low-level information |
| \li |
| |
| The depth() function returns the depth of the image. The supported |
| depths are 1 (monochrome), 8, 16, 24 and 32 bits. The |
| bitPlaneCount() function tells how many of those bits that are |
| used. For more information see the |
| \l {QImage#Image Formats}{Image Formats} section. |
| |
| The format(), bytesPerLine(), and sizeInBytes() functions provide |
| low-level information about the data stored in the image. |
| |
| The cacheKey() function returns a number that uniquely |
| identifies the contents of this QImage object. |
| \endtable |
| |
| \section1 Pixel Manipulation |
| |
| The functions used to manipulate an image's pixels depend on the |
| image format. The reason is that monochrome and 8-bit images are |
| index-based and use a color lookup table, while 32-bit images |
| store ARGB values directly. For more information on image formats, |
| see the \l {Image Formats} section. |
| |
| In case of a 32-bit image, the setPixel() function can be used to |
| alter the color of the pixel at the given coordinates to any other |
| color specified as an ARGB quadruplet. To make a suitable QRgb |
| value, use the qRgb() (adding a default alpha component to the |
| given RGB values, i.e. creating an opaque color) or qRgba() |
| function. For example: |
| |
| \table |
| \header |
| \li {2,1}32-bit |
| \row |
| \li \inlineimage qimage-32bit_scaled.png |
| \li |
| \snippet code/src_gui_image_qimage.cpp 0 |
| \endtable |
| |
| In case of a 8-bit and monchrome images, the pixel value is only |
| an index from the image's color table. So the setPixel() function |
| can only be used to alter the color of the pixel at the given |
| coordinates to a predefined color from the image's color table, |
| i.e. it can only change the pixel's index value. To alter or add a |
| color to an image's color table, use the setColor() function. |
| |
| An entry in the color table is an ARGB quadruplet encoded as an |
| QRgb value. Use the qRgb() and qRgba() functions to make a |
| suitable QRgb value for use with the setColor() function. For |
| example: |
| |
| \table |
| \header |
| \li {2,1} 8-bit |
| \row |
| \li \inlineimage qimage-8bit_scaled.png |
| \li |
| \snippet code/src_gui_image_qimage.cpp 1 |
| \endtable |
| |
| For images with more than 8-bit per color-channel. The methods |
| setPixelColor() and pixelColor() can be used to set and get |
| with QColor values. |
| |
| QImage also provide the scanLine() function which returns a |
| pointer to the pixel data at the scanline with the given index, |
| and the bits() function which returns a pointer to the first pixel |
| data (this is equivalent to \c scanLine(0)). |
| |
| \section1 Image Formats |
| |
| Each pixel stored in a QImage is represented by an integer. The |
| size of the integer varies depending on the format. QImage |
| supports several image formats described by the \l Format |
| enum. |
| |
| Monochrome images are stored using 1-bit indexes into a color table |
| with at most two colors. There are two different types of |
| monochrome images: big endian (MSB first) or little endian (LSB |
| first) bit order. |
| |
| 8-bit images are stored using 8-bit indexes into a color table, |
| i.e. they have a single byte per pixel. The color table is a |
| QVector<QRgb>, and the QRgb typedef is equivalent to an unsigned |
| int containing an ARGB quadruplet on the format 0xAARRGGBB. |
| |
| 32-bit images have no color table; instead, each pixel contains an |
| QRgb value. There are three different types of 32-bit images |
| storing RGB (i.e. 0xffRRGGBB), ARGB and premultiplied ARGB |
| values respectively. In the premultiplied format the red, green, |
| and blue channels are multiplied by the alpha component divided by |
| 255. |
| |
| An image's format can be retrieved using the format() |
| function. Use the convertToFormat() functions to convert an image |
| into another format. The allGray() and isGrayscale() functions |
| tell whether a color image can safely be converted to a grayscale |
| image. |
| |
| \section1 Image Transformations |
| |
| QImage supports a number of functions for creating a new image |
| that is a transformed version of the original: The |
| createAlphaMask() function builds and returns a 1-bpp mask from |
| the alpha buffer in this image, and the createHeuristicMask() |
| function creates and returns a 1-bpp heuristic mask for this |
| image. The latter function works by selecting a color from one of |
| the corners, then chipping away pixels of that color starting at |
| all the edges. |
| |
| The mirrored() function returns a mirror of the image in the |
| desired direction, the scaled() returns a copy of the image scaled |
| to a rectangle of the desired measures, and the rgbSwapped() function |
| constructs a BGR image from a RGB image. |
| |
| The scaledToWidth() and scaledToHeight() functions return scaled |
| copies of the image. |
| |
| The transformed() function returns a copy of the image that is |
| transformed with the given transformation matrix and |
| transformation mode: Internally, the transformation matrix is |
| adjusted to compensate for unwanted translation, |
| i.e. transformed() returns the smallest image containing all |
| transformed points of the original image. The static trueMatrix() |
| function returns the actual matrix used for transforming the |
| image. |
| |
| There are also functions for changing attributes of an image |
| in-place: |
| |
| \table |
| \header \li Function \li Description |
| \row |
| \li setDotsPerMeterX() |
| \li Defines the aspect ratio by setting the number of pixels that fit |
| horizontally in a physical meter. |
| \row |
| \li setDotsPerMeterY() |
| \li Defines the aspect ratio by setting the number of pixels that fit |
| vertically in a physical meter. |
| \row |
| \li fill() |
| \li Fills the entire image with the given pixel value. |
| \row |
| \li invertPixels() |
| \li Inverts all pixel values in the image using the given InvertMode value. |
| \row |
| \li setColorTable() |
| \li Sets the color table used to translate color indexes. Only |
| monochrome and 8-bit formats. |
| \row |
| \li setColorCount() |
| \li Resizes the color table. Only monochrome and 8-bit formats. |
| |
| \endtable |
| |
| \sa QImageReader, QImageWriter, QPixmap, QSvgRenderer, {Image Composition Example}, |
| {Image Viewer Example}, {Scribble Example}, {Pixelator Example} |
| */ |
| |
| /*! |
| \fn QImage::QImage(QImage &&other) |
| |
| Move-constructs a QImage instance, making it point at the same |
| object that \a other was pointing to. |
| |
| \since 5.2 |
| */ |
| |
| /*! |
| \fn QImage &QImage::operator=(QImage &&other) |
| |
| Move-assigns \a other to this QImage instance. |
| |
| \since 5.2 |
| */ |
| |
| /*! |
| \typedef QImageCleanupFunction |
| \relates QImage |
| \since 5.0 |
| |
| A function with the following signature that can be used to |
| implement basic image memory management: |
| |
| \code |
| void myImageCleanupHandler(void *info); |
| \endcode |
| */ |
| |
| /*! |
| \enum QImage::InvertMode |
| |
| This enum type is used to describe how pixel values should be |
| inverted in the invertPixels() function. |
| |
| \value InvertRgb Invert only the RGB values and leave the alpha |
| channel unchanged. |
| |
| \value InvertRgba Invert all channels, including the alpha channel. |
| |
| \sa invertPixels() |
| */ |
| |
| /*! |
| \enum QImage::Format |
| |
| The following image formats are available in Qt. |
| See the notes after the table. |
| |
| \value Format_Invalid The image is invalid. |
| \value Format_Mono The image is stored using 1-bit per pixel. Bytes are |
| packed with the most significant bit (MSB) first. |
| \value Format_MonoLSB The image is stored using 1-bit per pixel. Bytes are |
| packed with the less significant bit (LSB) first. |
| |
| \value Format_Indexed8 The image is stored using 8-bit indexes |
| into a colormap. |
| |
| \value Format_RGB32 The image is stored using a 32-bit RGB format (0xffRRGGBB). |
| |
| \value Format_ARGB32 The image is stored using a 32-bit ARGB |
| format (0xAARRGGBB). |
| |
| \value Format_ARGB32_Premultiplied The image is stored using a premultiplied 32-bit |
| ARGB format (0xAARRGGBB), i.e. the red, |
| green, and blue channels are multiplied |
| by the alpha component divided by 255. (If RR, GG, or BB |
| has a higher value than the alpha channel, the results are |
| undefined.) Certain operations (such as image composition |
| using alpha blending) are faster using premultiplied ARGB32 |
| than with plain ARGB32. |
| |
| \value Format_RGB16 The image is stored using a 16-bit RGB format (5-6-5). |
| |
| \value Format_ARGB8565_Premultiplied The image is stored using a |
| premultiplied 24-bit ARGB format (8-5-6-5). |
| \value Format_RGB666 The image is stored using a 24-bit RGB format (6-6-6). |
| The unused most significant bits is always zero. |
| \value Format_ARGB6666_Premultiplied The image is stored using a |
| premultiplied 24-bit ARGB format (6-6-6-6). |
| \value Format_RGB555 The image is stored using a 16-bit RGB format (5-5-5). |
| The unused most significant bit is always zero. |
| \value Format_ARGB8555_Premultiplied The image is stored using a |
| premultiplied 24-bit ARGB format (8-5-5-5). |
| \value Format_RGB888 The image is stored using a 24-bit RGB format (8-8-8). |
| \value Format_RGB444 The image is stored using a 16-bit RGB format (4-4-4). |
| The unused bits are always zero. |
| \value Format_ARGB4444_Premultiplied The image is stored using a |
| premultiplied 16-bit ARGB format (4-4-4-4). |
| \value Format_RGBX8888 The image is stored using a 32-bit byte-ordered RGB(x) format (8-8-8-8). |
| This is the same as the Format_RGBA8888 except alpha must always be 255. (added in Qt 5.2) |
| \value Format_RGBA8888 The image is stored using a 32-bit byte-ordered RGBA format (8-8-8-8). |
| Unlike ARGB32 this is a byte-ordered format, which means the 32bit |
| encoding differs between big endian and little endian architectures, |
| being respectively (0xRRGGBBAA) and (0xAABBGGRR). The order of the colors |
| is the same on any architecture if read as bytes 0xRR,0xGG,0xBB,0xAA. (added in Qt 5.2) |
| \value Format_RGBA8888_Premultiplied The image is stored using a |
| premultiplied 32-bit byte-ordered RGBA format (8-8-8-8). (added in Qt 5.2) |
| \value Format_BGR30 The image is stored using a 32-bit BGR format (x-10-10-10). (added in Qt 5.4) |
| \value Format_A2BGR30_Premultiplied The image is stored using a 32-bit premultiplied ABGR format (2-10-10-10). (added in Qt 5.4) |
| \value Format_RGB30 The image is stored using a 32-bit RGB format (x-10-10-10). (added in Qt 5.4) |
| \value Format_A2RGB30_Premultiplied The image is stored using a 32-bit premultiplied ARGB format (2-10-10-10). (added in Qt 5.4) |
| \value Format_Alpha8 The image is stored using an 8-bit alpha only format. (added in Qt 5.5) |
| \value Format_Grayscale8 The image is stored using an 8-bit grayscale format. (added in Qt 5.5) |
| \value Format_Grayscale16 The image is stored using an 16-bit grayscale format. (added in Qt 5.13) |
| \value Format_RGBX64 The image is stored using a 64-bit halfword-ordered RGB(x) format (16-16-16-16). |
| This is the same as the Format_RGBA64 except alpha must always be 65535. (added in Qt 5.12) |
| \value Format_RGBA64 The image is stored using a 64-bit halfword-ordered RGBA format (16-16-16-16). (added in Qt 5.12) |
| \value Format_RGBA64_Premultiplied The image is stored using a premultiplied 64-bit halfword-ordered |
| RGBA format (16-16-16-16). (added in Qt 5.12) |
| \value Format_BGR888 The image is stored using a 24-bit BGR format. (added in Qt 5.14) |
| |
| \note Drawing into a QImage with QImage::Format_Indexed8 is not |
| supported. |
| |
| \note Avoid most rendering directly to most of these formats using QPainter. Rendering |
| is best optimized to the \c Format_RGB32 and \c Format_ARGB32_Premultiplied formats, and secondarily for rendering to the |
| \c Format_RGB16, \c Format_RGBX8888, \c Format_RGBA8888_Premultiplied, \c Format_RGBX64 and \c Format_RGBA64_Premultiplied formats |
| |
| \sa format(), convertToFormat() |
| */ |
| |
| /***************************************************************************** |
| QImage member functions |
| *****************************************************************************/ |
| |
| /*! |
| Constructs a null image. |
| |
| \sa isNull() |
| */ |
| |
| QImage::QImage() noexcept |
| : QPaintDevice() |
| { |
| d = 0; |
| } |
| |
| /*! |
| Constructs an image with the given \a width, \a height and \a |
| format. |
| |
| A \l{isNull()}{null} image will be returned if memory cannot be allocated. |
| |
| \warning This will create a QImage with uninitialized data. Call |
| fill() to fill the image with an appropriate pixel value before |
| drawing onto it with QPainter. |
| */ |
| QImage::QImage(int width, int height, Format format) |
| : QImage(QSize(width, height), format) |
| { |
| } |
| |
| /*! |
| Constructs an image with the given \a size and \a format. |
| |
| A \l{isNull()}{null} image is returned if memory cannot be allocated. |
| |
| \warning This will create a QImage with uninitialized data. Call |
| fill() to fill the image with an appropriate pixel value before |
| drawing onto it with QPainter. |
| */ |
| QImage::QImage(const QSize &size, Format format) |
| : QPaintDevice() |
| { |
| d = QImageData::create(size, format); |
| } |
| |
| |
| |
| QImageData *QImageData::create(uchar *data, int width, int height, int bpl, QImage::Format format, bool readOnly, QImageCleanupFunction cleanupFunction, void *cleanupInfo) |
| { |
| if (width <= 0 || height <= 0 || !data || format == QImage::Format_Invalid) |
| return nullptr; |
| |
| const int depth = qt_depthForFormat(format); |
| auto params = calculateImageParameters(width, height, depth); |
| if (!params.isValid()) |
| return nullptr; |
| |
| if (bpl > 0) { |
| // can't overflow, because has calculateImageParameters already done this multiplication |
| const int min_bytes_per_line = (width * depth + 7)/8; |
| if (bpl < min_bytes_per_line) |
| return nullptr; |
| |
| // recalculate the total with this value |
| params.bytesPerLine = bpl; |
| if (mul_overflow<qsizetype>(bpl, height, ¶ms.totalSize)) |
| return nullptr; |
| } |
| |
| QImageData *d = new QImageData; |
| d->ref.ref(); |
| |
| d->own_data = false; |
| d->ro_data = readOnly; |
| d->data = data; |
| d->width = width; |
| d->height = height; |
| d->depth = depth; |
| d->format = format; |
| |
| d->bytes_per_line = params.bytesPerLine; |
| d->nbytes = params.totalSize; |
| |
| d->cleanupFunction = cleanupFunction; |
| d->cleanupInfo = cleanupInfo; |
| |
| return d; |
| } |
| |
| /*! |
| Constructs an image with the given \a width, \a height and \a |
| format, that uses an existing memory buffer, \a data. The \a width |
| and \a height must be specified in pixels, \a data must be 32-bit aligned, |
| and each scanline of data in the image must also be 32-bit aligned. |
| |
| The buffer must remain valid throughout the life of the QImage and |
| all copies that have not been modified or otherwise detached from |
| the original buffer. The image does not delete the buffer at destruction. |
| You can provide a function pointer \a cleanupFunction along with an |
| extra pointer \a cleanupInfo that will be called when the last copy |
| is destroyed. |
| |
| If \a format is an indexed color format, the image color table is |
| initially empty and must be sufficiently expanded with |
| setColorCount() or setColorTable() before the image is used. |
| */ |
| QImage::QImage(uchar* data, int width, int height, Format format, QImageCleanupFunction cleanupFunction, void *cleanupInfo) |
| : QPaintDevice() |
| { |
| d = QImageData::create(data, width, height, 0, format, false, cleanupFunction, cleanupInfo); |
| } |
| |
| /*! |
| Constructs an image with the given \a width, \a height and \a |
| format, that uses an existing read-only memory buffer, \a |
| data. The \a width and \a height must be specified in pixels, \a |
| data must be 32-bit aligned, and each scanline of data in the |
| image must also be 32-bit aligned. |
| |
| The buffer must remain valid throughout the life of the QImage and |
| all copies that have not been modified or otherwise detached from |
| the original buffer. The image does not delete the buffer at destruction. |
| You can provide a function pointer \a cleanupFunction along with an |
| extra pointer \a cleanupInfo that will be called when the last copy |
| is destroyed. |
| |
| If \a format is an indexed color format, the image color table is |
| initially empty and must be sufficiently expanded with |
| setColorCount() or setColorTable() before the image is used. |
| |
| Unlike the similar QImage constructor that takes a non-const data buffer, |
| this version will never alter the contents of the buffer. For example, |
| calling QImage::bits() will return a deep copy of the image, rather than |
| the buffer passed to the constructor. This allows for the efficiency of |
| constructing a QImage from raw data, without the possibility of the raw |
| data being changed. |
| */ |
| QImage::QImage(const uchar* data, int width, int height, Format format, QImageCleanupFunction cleanupFunction, void *cleanupInfo) |
| : QPaintDevice() |
| { |
| d = QImageData::create(const_cast<uchar*>(data), width, height, 0, format, true, cleanupFunction, cleanupInfo); |
| } |
| |
| /*! |
| Constructs an image with the given \a width, \a height and \a |
| format, that uses an existing memory buffer, \a data. The \a width |
| and \a height must be specified in pixels. \a bytesPerLine |
| specifies the number of bytes per line (stride). |
| |
| The buffer must remain valid throughout the life of the QImage and |
| all copies that have not been modified or otherwise detached from |
| the original buffer. The image does not delete the buffer at destruction. |
| You can provide a function pointer \a cleanupFunction along with an |
| extra pointer \a cleanupInfo that will be called when the last copy |
| is destroyed. |
| |
| If \a format is an indexed color format, the image color table is |
| initially empty and must be sufficiently expanded with |
| setColorCount() or setColorTable() before the image is used. |
| */ |
| QImage::QImage(uchar *data, int width, int height, int bytesPerLine, Format format, QImageCleanupFunction cleanupFunction, void *cleanupInfo) |
| :QPaintDevice() |
| { |
| d = QImageData::create(data, width, height, bytesPerLine, format, false, cleanupFunction, cleanupInfo); |
| } |
| |
| |
| /*! |
| Constructs an image with the given \a width, \a height and \a |
| format, that uses an existing memory buffer, \a data. The \a width |
| and \a height must be specified in pixels. \a bytesPerLine |
| specifies the number of bytes per line (stride). |
| |
| The buffer must remain valid throughout the life of the QImage and |
| all copies that have not been modified or otherwise detached from |
| the original buffer. The image does not delete the buffer at destruction. |
| You can provide a function pointer \a cleanupFunction along with an |
| extra pointer \a cleanupInfo that will be called when the last copy |
| is destroyed. |
| |
| If \a format is an indexed color format, the image color table is |
| initially empty and must be sufficiently expanded with |
| setColorCount() or setColorTable() before the image is used. |
| |
| Unlike the similar QImage constructor that takes a non-const data buffer, |
| this version will never alter the contents of the buffer. For example, |
| calling QImage::bits() will return a deep copy of the image, rather than |
| the buffer passed to the constructor. This allows for the efficiency of |
| constructing a QImage from raw data, without the possibility of the raw |
| data being changed. |
| */ |
| |
| QImage::QImage(const uchar *data, int width, int height, int bytesPerLine, Format format, QImageCleanupFunction cleanupFunction, void *cleanupInfo) |
| :QPaintDevice() |
| { |
| d = QImageData::create(const_cast<uchar*>(data), width, height, bytesPerLine, format, true, cleanupFunction, cleanupInfo); |
| } |
| |
| /*! |
| Constructs an image and tries to load the image from the file with |
| the given \a fileName. |
| |
| The loader attempts to read the image using the specified \a |
| format. If the \a format is not specified (which is the default), |
| it is auto-detected based on the file's suffix and header. For |
| details, see {QImageReader::setAutoDetectImageFormat()}{QImageReader}. |
| |
| If the loading of the image failed, this object is a null image. |
| |
| The file name can either refer to an actual file on disk or to one |
| of the application's embedded resources. See the |
| \l{resources.html}{Resource System} overview for details on how to |
| embed images and other resource files in the application's |
| executable. |
| |
| \sa isNull(), {QImage#Reading and Writing Image Files}{Reading and Writing Image Files} |
| */ |
| |
| QImage::QImage(const QString &fileName, const char *format) |
| : QPaintDevice() |
| { |
| d = 0; |
| load(fileName, format); |
| } |
| |
| #ifndef QT_NO_IMAGEFORMAT_XPM |
| extern bool qt_read_xpm_image_or_array(QIODevice *device, const char * const *source, QImage &image); |
| |
| /*! |
| Constructs an image from the given \a xpm image. |
| |
| Make sure that the image is a valid XPM image. Errors are silently |
| ignored. |
| |
| Note that it's possible to squeeze the XPM variable a little bit |
| by using an unusual declaration: |
| |
| \snippet code/src_gui_image_qimage.cpp 2 |
| |
| The extra \c const makes the entire definition read-only, which is |
| slightly more efficient (e.g., when the code is in a shared |
| library) and able to be stored in ROM with the application. |
| */ |
| |
| QImage::QImage(const char * const xpm[]) |
| : QPaintDevice() |
| { |
| d = 0; |
| if (!xpm) |
| return; |
| if (!qt_read_xpm_image_or_array(0, xpm, *this)) |
| // Issue: Warning because the constructor may be ambigious |
| qWarning("QImage::QImage(), XPM is not supported"); |
| } |
| #endif // QT_NO_IMAGEFORMAT_XPM |
| |
| /*! |
| Constructs a shallow copy of the given \a image. |
| |
| For more information about shallow copies, see the \l {Implicit |
| Data Sharing} documentation. |
| |
| \sa copy() |
| */ |
| |
| QImage::QImage(const QImage &image) |
| : QPaintDevice() |
| { |
| if (image.paintingActive() || isLocked(image.d)) { |
| d = 0; |
| image.copy().swap(*this); |
| } else { |
| d = image.d; |
| if (d) |
| d->ref.ref(); |
| } |
| } |
| |
| /*! |
| Destroys the image and cleans up. |
| */ |
| |
| QImage::~QImage() |
| { |
| if (d && !d->ref.deref()) |
| delete d; |
| } |
| |
| /*! |
| Assigns a shallow copy of the given \a image to this image and |
| returns a reference to this image. |
| |
| For more information about shallow copies, see the \l {Implicit |
| Data Sharing} documentation. |
| |
| \sa copy(), QImage() |
| */ |
| |
| QImage &QImage::operator=(const QImage &image) |
| { |
| if (image.paintingActive() || isLocked(image.d)) { |
| operator=(image.copy()); |
| } else { |
| if (image.d) |
| image.d->ref.ref(); |
| if (d && !d->ref.deref()) |
| delete d; |
| d = image.d; |
| } |
| return *this; |
| } |
| |
| /*! |
| \fn void QImage::swap(QImage &other) |
| \since 4.8 |
| |
| Swaps image \a other with this image. This operation is very |
| fast and never fails. |
| */ |
| |
| /*! |
| \internal |
| */ |
| int QImage::devType() const |
| { |
| return QInternal::Image; |
| } |
| |
| /*! |
| Returns the image as a QVariant. |
| */ |
| QImage::operator QVariant() const |
| { |
| return QVariant(QVariant::Image, this); |
| } |
| |
| /*! |
| \internal |
| |
| If multiple images share common data, this image makes a copy of |
| the data and detaches itself from the sharing mechanism, making |
| sure that this image is the only one referring to the data. |
| |
| Nothing is done if there is just a single reference. |
| |
| \sa copy(), {QImage::isDetached()}{isDetached()}, {Implicit Data Sharing} |
| */ |
| void QImage::detach() |
| { |
| if (d) { |
| if (d->is_cached && d->ref.loadRelaxed() == 1) |
| QImagePixmapCleanupHooks::executeImageHooks(cacheKey()); |
| |
| if (d->ref.loadRelaxed() != 1 || d->ro_data) |
| *this = copy(); |
| |
| if (d) |
| ++d->detach_no; |
| } |
| } |
| |
| |
| static void copyPhysicalMetadata(QImageData *dst, const QImageData *src) |
| { |
| dst->dpmx = src->dpmx; |
| dst->dpmy = src->dpmy; |
| dst->devicePixelRatio = src->devicePixelRatio; |
| } |
| |
| static void copyMetadata(QImageData *dst, const QImageData *src) |
| { |
| // Doesn't copy colortable and alpha_clut, or offset. |
| copyPhysicalMetadata(dst, src); |
| dst->text = src->text; |
| dst->colorSpace = src->colorSpace; |
| } |
| |
| static void copyMetadata(QImage *dst, const QImage &src) |
| { |
| dst->setDotsPerMeterX(src.dotsPerMeterX()); |
| dst->setDotsPerMeterY(src.dotsPerMeterY()); |
| dst->setDevicePixelRatio(src.devicePixelRatio()); |
| const auto textKeys = src.textKeys(); |
| for (const auto &key: textKeys) |
| dst->setText(key, src.text(key)); |
| |
| } |
| |
| /*! |
| \fn QImage QImage::copy(int x, int y, int width, int height) const |
| \overload |
| |
| The returned image is copied from the position (\a x, \a y) in |
| this image, and will always have the given \a width and \a height. |
| In areas beyond this image, pixels are set to 0. |
| |
| */ |
| |
| /*! |
| \fn QImage QImage::copy(const QRect& rectangle) const |
| |
| Returns a sub-area of the image as a new image. |
| |
| The returned image is copied from the position (\a |
| {rectangle}.x(), \a{rectangle}.y()) in this image, and will always |
| have the size of the given \a rectangle. |
| |
| In areas beyond this image, pixels are set to 0. For 32-bit RGB |
| images, this means black; for 32-bit ARGB images, this means |
| transparent black; for 8-bit images, this means the color with |
| index 0 in the color table which can be anything; for 1-bit |
| images, this means Qt::color0. |
| |
| If the given \a rectangle is a null rectangle the entire image is |
| copied. |
| |
| \sa QImage() |
| */ |
| QImage QImage::copy(const QRect& r) const |
| { |
| if (!d) |
| return QImage(); |
| |
| if (r.isNull()) { |
| QImage image(d->width, d->height, d->format); |
| if (image.isNull()) |
| return image; |
| |
| // Qt for Embedded Linux can create images with non-default bpl |
| // make sure we don't crash. |
| if (image.d->nbytes != d->nbytes) { |
| int bpl = qMin(bytesPerLine(), image.bytesPerLine()); |
| for (int i = 0; i < height(); i++) |
| memcpy(image.scanLine(i), scanLine(i), bpl); |
| } else |
| memcpy(image.bits(), bits(), d->nbytes); |
| image.d->colortable = d->colortable; |
| image.d->offset = d->offset; |
| image.d->has_alpha_clut = d->has_alpha_clut; |
| copyMetadata(image.d, d); |
| return image; |
| } |
| |
| int x = r.x(); |
| int y = r.y(); |
| int w = r.width(); |
| int h = r.height(); |
| |
| int dx = 0; |
| int dy = 0; |
| if (w <= 0 || h <= 0) |
| return QImage(); |
| |
| QImage image(w, h, d->format); |
| if (image.isNull()) |
| return image; |
| |
| if (x < 0 || y < 0 || x + w > d->width || y + h > d->height) { |
| // bitBlt will not cover entire image - clear it. |
| image.fill(0); |
| if (x < 0) { |
| dx = -x; |
| x = 0; |
| } |
| if (y < 0) { |
| dy = -y; |
| y = 0; |
| } |
| } |
| |
| image.d->colortable = d->colortable; |
| |
| int pixels_to_copy = qMax(w - dx, 0); |
| if (x > d->width) |
| pixels_to_copy = 0; |
| else if (pixels_to_copy > d->width - x) |
| pixels_to_copy = d->width - x; |
| int lines_to_copy = qMax(h - dy, 0); |
| if (y > d->height) |
| lines_to_copy = 0; |
| else if (lines_to_copy > d->height - y) |
| lines_to_copy = d->height - y; |
| |
| bool byteAligned = true; |
| if (d->format == Format_Mono || d->format == Format_MonoLSB) |
| byteAligned = !(dx & 7) && !(x & 7) && !(pixels_to_copy & 7); |
| |
| if (byteAligned) { |
| const uchar *src = d->data + ((x * d->depth) >> 3) + y * d->bytes_per_line; |
| uchar *dest = image.d->data + ((dx * d->depth) >> 3) + dy * image.d->bytes_per_line; |
| const int bytes_to_copy = (pixels_to_copy * d->depth) >> 3; |
| for (int i = 0; i < lines_to_copy; ++i) { |
| memcpy(dest, src, bytes_to_copy); |
| src += d->bytes_per_line; |
| dest += image.d->bytes_per_line; |
| } |
| } else if (d->format == Format_Mono) { |
| const uchar *src = d->data + y * d->bytes_per_line; |
| uchar *dest = image.d->data + dy * image.d->bytes_per_line; |
| for (int i = 0; i < lines_to_copy; ++i) { |
| for (int j = 0; j < pixels_to_copy; ++j) { |
| if (src[(x + j) >> 3] & (0x80 >> ((x + j) & 7))) |
| dest[(dx + j) >> 3] |= (0x80 >> ((dx + j) & 7)); |
| else |
| dest[(dx + j) >> 3] &= ~(0x80 >> ((dx + j) & 7)); |
| } |
| src += d->bytes_per_line; |
| dest += image.d->bytes_per_line; |
| } |
| } else { // Format_MonoLSB |
| Q_ASSERT(d->format == Format_MonoLSB); |
| const uchar *src = d->data + y * d->bytes_per_line; |
| uchar *dest = image.d->data + dy * image.d->bytes_per_line; |
| for (int i = 0; i < lines_to_copy; ++i) { |
| for (int j = 0; j < pixels_to_copy; ++j) { |
| if (src[(x + j) >> 3] & (0x1 << ((x + j) & 7))) |
| dest[(dx + j) >> 3] |= (0x1 << ((dx + j) & 7)); |
| else |
| dest[(dx + j) >> 3] &= ~(0x1 << ((dx + j) & 7)); |
| } |
| src += d->bytes_per_line; |
| dest += image.d->bytes_per_line; |
| } |
| } |
| |
| copyMetadata(image.d, d); |
| image.d->offset = offset(); |
| image.d->has_alpha_clut = d->has_alpha_clut; |
| return image; |
| } |
| |
| |
| /*! |
| \fn bool QImage::isNull() const |
| |
| Returns \c true if it is a null image, otherwise returns \c false. |
| |
| A null image has all parameters set to zero and no allocated data. |
| */ |
| bool QImage::isNull() const |
| { |
| return !d; |
| } |
| |
| /*! |
| \fn int QImage::width() const |
| |
| Returns the width of the image. |
| |
| \sa {QImage#Image Information}{Image Information} |
| */ |
| int QImage::width() const |
| { |
| return d ? d->width : 0; |
| } |
| |
| /*! |
| \fn int QImage::height() const |
| |
| Returns the height of the image. |
| |
| \sa {QImage#Image Information}{Image Information} |
| */ |
| int QImage::height() const |
| { |
| return d ? d->height : 0; |
| } |
| |
| /*! |
| \fn QSize QImage::size() const |
| |
| Returns the size of the image, i.e. its width() and height(). |
| |
| \sa {QImage#Image Information}{Image Information} |
| */ |
| QSize QImage::size() const |
| { |
| return d ? QSize(d->width, d->height) : QSize(0, 0); |
| } |
| |
| /*! |
| \fn QRect QImage::rect() const |
| |
| Returns the enclosing rectangle (0, 0, width(), height()) of the |
| image. |
| |
| \sa {QImage#Image Information}{Image Information} |
| */ |
| QRect QImage::rect() const |
| { |
| return d ? QRect(0, 0, d->width, d->height) : QRect(); |
| } |
| |
| /*! |
| Returns the depth of the image. |
| |
| The image depth is the number of bits used to store a single |
| pixel, also called bits per pixel (bpp). |
| |
| The supported depths are 1, 8, 16, 24, 32 and 64. |
| |
| \sa bitPlaneCount(), convertToFormat(), {QImage#Image Formats}{Image Formats}, |
| {QImage#Image Information}{Image Information} |
| |
| */ |
| int QImage::depth() const |
| { |
| return d ? d->depth : 0; |
| } |
| |
| /*! |
| \obsolete |
| \fn int QImage::numColors() const |
| |
| Returns the size of the color table for the image. |
| |
| \sa setColorCount() |
| */ |
| |
| /*! |
| \since 4.6 |
| \fn int QImage::colorCount() const |
| |
| Returns the size of the color table for the image. |
| |
| Notice that colorCount() returns 0 for 32-bpp images because these |
| images do not use color tables, but instead encode pixel values as |
| ARGB quadruplets. |
| |
| \sa setColorCount(), {QImage#Image Information}{Image Information} |
| */ |
| int QImage::colorCount() const |
| { |
| return d ? d->colortable.size() : 0; |
| } |
| |
| /*! |
| Sets the color table used to translate color indexes to QRgb |
| values, to the specified \a colors. |
| |
| When the image is used, the color table must be large enough to |
| have entries for all the pixel/index values present in the image, |
| otherwise the results are undefined. |
| |
| \sa colorTable(), setColor(), {QImage#Image Transformations}{Image |
| Transformations} |
| */ |
| #if QT_VERSION >= QT_VERSION_CHECK(6,0,0) |
| void QImage::setColorTable(const QVector<QRgb> &colors) |
| #else |
| void QImage::setColorTable(const QVector<QRgb> colors) |
| #endif |
| { |
| if (!d) |
| return; |
| detach(); |
| |
| // In case detach() ran out of memory |
| if (!d) |
| return; |
| |
| #if QT_VERSION >= QT_VERSION_CHECK(6,0,0) |
| d->colortable = colors; |
| #else |
| d->colortable = std::move(const_cast<QVector<QRgb>&>(colors)); |
| #endif |
| d->has_alpha_clut = false; |
| for (int i = 0; i < d->colortable.size(); ++i) { |
| if (qAlpha(d->colortable.at(i)) != 255) { |
| d->has_alpha_clut = true; |
| break; |
| } |
| } |
| } |
| |
| /*! |
| Returns a list of the colors contained in the image's color table, |
| or an empty list if the image does not have a color table |
| |
| \sa setColorTable(), colorCount(), color() |
| */ |
| QVector<QRgb> QImage::colorTable() const |
| { |
| return d ? d->colortable : QVector<QRgb>(); |
| } |
| |
| /*! |
| Returns the device pixel ratio for the image. This is the |
| ratio between \e{device pixels} and \e{device independent pixels}. |
| |
| Use this function when calculating layout geometry based on |
| the image size: QSize layoutSize = image.size() / image.devicePixelRatio() |
| |
| The default value is 1.0. |
| |
| \sa setDevicePixelRatio(), QImageReader |
| */ |
| qreal QImage::devicePixelRatio() const |
| { |
| if (!d) |
| return 1.0; |
| return d->devicePixelRatio; |
| } |
| |
| /*! |
| Sets the device pixel ratio for the image. This is the |
| ratio between image pixels and device-independent pixels. |
| |
| The default \a scaleFactor is 1.0. Setting it to something else has |
| two effects: |
| |
| QPainters that are opened on the image will be scaled. For |
| example, painting on a 200x200 image if with a ratio of 2.0 |
| will result in effective (device-independent) painting bounds |
| of 100x100. |
| |
| Code paths in Qt that calculate layout geometry based on the |
| image size will take the ratio into account: |
| QSize layoutSize = image.size() / image.devicePixelRatio() |
| The net effect of this is that the image is displayed as |
| high-DPI image rather than a large image |
| (see \l{Drawing High Resolution Versions of Pixmaps and Images}). |
| |
| \sa devicePixelRatio() |
| */ |
| void QImage::setDevicePixelRatio(qreal scaleFactor) |
| { |
| if (!d) |
| return; |
| |
| if (scaleFactor == d->devicePixelRatio) |
| return; |
| |
| detach(); |
| if (d) |
| d->devicePixelRatio = scaleFactor; |
| } |
| |
| #if QT_DEPRECATED_SINCE(5, 10) |
| /*! |
| \since 4.6 |
| \obsolete |
| Returns the number of bytes occupied by the image data. |
| |
| Note this method should never be called on an image larger than 2 gigabytes. |
| Instead use sizeInBytes(). |
| |
| \sa sizeInBytes(), bytesPerLine(), bits(), {QImage#Image Information}{Image |
| Information} |
| */ |
| int QImage::byteCount() const |
| { |
| Q_ASSERT(!d || d->nbytes < std::numeric_limits<int>::max()); |
| return d ? int(d->nbytes) : 0; |
| } |
| #endif |
| |
| /*! |
| \since 5.10 |
| Returns the image data size in bytes. |
| |
| \sa byteCount(), bytesPerLine(), bits(), {QImage#Image Information}{Image |
| Information} |
| */ |
| qsizetype QImage::sizeInBytes() const |
| { |
| return d ? d->nbytes : 0; |
| } |
| |
| /*! |
| Returns the number of bytes per image scanline. |
| |
| This is equivalent to sizeInBytes() / height() if height() is non-zero. |
| |
| \sa scanLine() |
| */ |
| #if QT_VERSION >= QT_VERSION_CHECK(6,0,0) |
| qsizetype QImage::bytesPerLine() const |
| { |
| return d ? d->bytes_per_line : 0; |
| } |
| #else |
| int QImage::bytesPerLine() const |
| { |
| return d ? d->bytes_per_line : 0; |
| } |
| #endif |
| |
| |
| /*! |
| Returns the color in the color table at index \a i. The first |
| color is at index 0. |
| |
| The colors in an image's color table are specified as ARGB |
| quadruplets (QRgb). Use the qAlpha(), qRed(), qGreen(), and |
| qBlue() functions to get the color value components. |
| |
| \sa setColor(), pixelIndex(), {QImage#Pixel Manipulation}{Pixel |
| Manipulation} |
| */ |
| QRgb QImage::color(int i) const |
| { |
| Q_ASSERT(i < colorCount()); |
| return d ? d->colortable.at(i) : QRgb(uint(-1)); |
| } |
| |
| /*! |
| \fn void QImage::setColor(int index, QRgb colorValue) |
| |
| Sets the color at the given \a index in the color table, to the |
| given to \a colorValue. The color value is an ARGB quadruplet. |
| |
| If \a index is outside the current size of the color table, it is |
| expanded with setColorCount(). |
| |
| \sa color(), colorCount(), setColorTable(), {QImage#Pixel Manipulation}{Pixel |
| Manipulation} |
| */ |
| void QImage::setColor(int i, QRgb c) |
| { |
| if (!d) |
| return; |
| if (i < 0 || d->depth > 8 || i >= 1<<d->depth) { |
| qWarning("QImage::setColor: Index out of bound %d", i); |
| return; |
| } |
| detach(); |
| |
| // In case detach() run out of memory |
| if (!d) |
| return; |
| |
| if (i >= d->colortable.size()) |
| setColorCount(i+1); |
| d->colortable[i] = c; |
| d->has_alpha_clut |= (qAlpha(c) != 255); |
| } |
| |
| /*! |
| Returns a pointer to the pixel data at the scanline with index \a |
| i. The first scanline is at index 0. |
| |
| The scanline data is as minimum 32-bit aligned. For 64-bit formats |
| it follows the native alignment of 64-bit integers (64-bit for most |
| platforms, but notably 32-bit on i386). |
| |
| \warning If you are accessing 32-bpp image data, cast the returned |
| pointer to \c{QRgb*} (QRgb has a 32-bit size) and use it to |
| read/write the pixel value. You cannot use the \c{uchar*} pointer |
| directly, because the pixel format depends on the byte order on |
| the underlying platform. Use qRed(), qGreen(), qBlue(), and |
| qAlpha() to access the pixels. |
| |
| \sa bytesPerLine(), bits(), {QImage#Pixel Manipulation}{Pixel |
| Manipulation}, constScanLine() |
| */ |
| uchar *QImage::scanLine(int i) |
| { |
| if (!d) |
| return 0; |
| |
| detach(); |
| |
| // In case detach() ran out of memory |
| if (!d) |
| return 0; |
| |
| return d->data + i * d->bytes_per_line; |
| } |
| |
| /*! |
| \overload |
| */ |
| const uchar *QImage::scanLine(int i) const |
| { |
| if (!d) |
| return 0; |
| |
| Q_ASSERT(i >= 0 && i < height()); |
| return d->data + i * d->bytes_per_line; |
| } |
| |
| |
| /*! |
| Returns a pointer to the pixel data at the scanline with index \a |
| i. The first scanline is at index 0. |
| |
| The scanline data is aligned on a 32-bit boundary. |
| |
| Note that QImage uses \l{Implicit Data Sharing} {implicit data |
| sharing}, but this function does \e not perform a deep copy of the |
| shared pixel data, because the returned data is const. |
| |
| \sa scanLine(), constBits() |
| \since 4.7 |
| */ |
| const uchar *QImage::constScanLine(int i) const |
| { |
| if (!d) |
| return 0; |
| |
| Q_ASSERT(i >= 0 && i < height()); |
| return d->data + i * d->bytes_per_line; |
| } |
| |
| /*! |
| Returns a pointer to the first pixel data. This is equivalent to |
| scanLine(0). |
| |
| Note that QImage uses \l{Implicit Data Sharing} {implicit data |
| sharing}. This function performs a deep copy of the shared pixel |
| data, thus ensuring that this QImage is the only one using the |
| current return value. |
| |
| \sa scanLine(), sizeInBytes(), constBits() |
| */ |
| uchar *QImage::bits() |
| { |
| if (!d) |
| return 0; |
| detach(); |
| |
| // In case detach ran out of memory... |
| if (!d) |
| return 0; |
| |
| return d->data; |
| } |
| |
| /*! |
| \overload |
| |
| Note that QImage uses \l{Implicit Data Sharing} {implicit data |
| sharing}, but this function does \e not perform a deep copy of the |
| shared pixel data, because the returned data is const. |
| */ |
| const uchar *QImage::bits() const |
| { |
| return d ? d->data : 0; |
| } |
| |
| |
| /*! |
| Returns a pointer to the first pixel data. |
| |
| Note that QImage uses \l{Implicit Data Sharing} {implicit data |
| sharing}, but this function does \e not perform a deep copy of the |
| shared pixel data, because the returned data is const. |
| |
| \sa bits(), constScanLine() |
| \since 4.7 |
| */ |
| const uchar *QImage::constBits() const |
| { |
| return d ? d->data : 0; |
| } |
| |
| /*! |
| \fn void QImage::fill(uint pixelValue) |
| |
| Fills the entire image with the given \a pixelValue. |
| |
| If the depth of this image is 1, only the lowest bit is used. If |
| you say fill(0), fill(2), etc., the image is filled with 0s. If |
| you say fill(1), fill(3), etc., the image is filled with 1s. If |
| the depth is 8, the lowest 8 bits are used and if the depth is 16 |
| the lowest 16 bits are used. |
| |
| Note: QImage::pixel() returns the color of the pixel at the given |
| coordinates while QColor::pixel() returns the pixel value of the |
| underlying window system (essentially an index value), so normally |
| you will want to use QImage::pixel() to use a color from an |
| existing image or QColor::rgb() to use a specific color. |
| |
| \sa depth(), {QImage#Image Transformations}{Image Transformations} |
| */ |
| |
| void QImage::fill(uint pixel) |
| { |
| if (!d) |
| return; |
| |
| detach(); |
| |
| // In case detach() ran out of memory |
| if (!d) |
| return; |
| |
| if (d->depth == 1 || d->depth == 8) { |
| int w = d->width; |
| if (d->depth == 1) { |
| if (pixel & 1) |
| pixel = 0xffffffff; |
| else |
| pixel = 0; |
| w = (w + 7) / 8; |
| } else { |
| pixel &= 0xff; |
| } |
| qt_rectfill<quint8>(d->data, pixel, 0, 0, |
| w, d->height, d->bytes_per_line); |
| return; |
| } else if (d->depth == 16) { |
| qt_rectfill<quint16>(reinterpret_cast<quint16*>(d->data), pixel, |
| 0, 0, d->width, d->height, d->bytes_per_line); |
| return; |
| } else if (d->depth == 24) { |
| qt_rectfill<quint24>(reinterpret_cast<quint24*>(d->data), pixel, |
| 0, 0, d->width, d->height, d->bytes_per_line); |
| return; |
| } else if (d->depth == 64) { |
| qt_rectfill<quint64>(reinterpret_cast<quint64*>(d->data), QRgba64::fromArgb32(pixel), |
| 0, 0, d->width, d->height, d->bytes_per_line); |
| return; |
| } |
| |
| if (d->format == Format_RGB32) |
| pixel |= 0xff000000; |
| if (d->format == Format_RGBX8888) |
| #if Q_BYTE_ORDER == Q_LITTLE_ENDIAN |
| pixel |= 0xff000000; |
| #else |
| pixel |= 0x000000ff; |
| #endif |
| if (d->format == Format_BGR30 || d->format == Format_RGB30) |
| pixel |= 0xc0000000; |
| |
| qt_rectfill<uint>(reinterpret_cast<uint*>(d->data), pixel, |
| 0, 0, d->width, d->height, d->bytes_per_line); |
| } |
| |
| |
| /*! |
| \fn void QImage::fill(Qt::GlobalColor color) |
| \overload |
| \since 4.8 |
| |
| Fills the image with the given \a color, described as a standard global |
| color. |
| */ |
| |
| void QImage::fill(Qt::GlobalColor color) |
| { |
| fill(QColor(color)); |
| } |
| |
| |
| |
| /*! |
| \fn void QImage::fill(const QColor &color) |
| |
| \overload |
| |
| Fills the entire image with the given \a color. |
| |
| If the depth of the image is 1, the image will be filled with 1 if |
| \a color equals Qt::color1; it will otherwise be filled with 0. |
| |
| If the depth of the image is 8, the image will be filled with the |
| index corresponding the \a color in the color table if present; it |
| will otherwise be filled with 0. |
| |
| \since 4.8 |
| */ |
| |
| void QImage::fill(const QColor &color) |
| { |
| if (!d) |
| return; |
| detach(); |
| |
| // In case we run out of memory |
| if (!d) |
| return; |
| |
| switch (d->format) { |
| case QImage::Format_RGB32: |
| case QImage::Format_ARGB32: |
| fill(color.rgba()); |
| break; |
| case QImage::Format_ARGB32_Premultiplied: |
| fill(qPremultiply(color.rgba())); |
| break; |
| case QImage::Format_RGBX8888: |
| fill(ARGB2RGBA(color.rgba() | 0xff000000)); |
| break; |
| case QImage::Format_RGBA8888: |
| fill(ARGB2RGBA(color.rgba())); |
| break; |
| case QImage::Format_RGBA8888_Premultiplied: |
| fill(ARGB2RGBA(qPremultiply(color.rgba()))); |
| break; |
| case QImage::Format_BGR30: |
| case QImage::Format_A2BGR30_Premultiplied: |
| fill(qConvertRgb64ToRgb30<PixelOrderBGR>(color.rgba64())); |
| break; |
| case QImage::Format_RGB30: |
| case QImage::Format_A2RGB30_Premultiplied: |
| fill(qConvertRgb64ToRgb30<PixelOrderRGB>(color.rgba64())); |
| break; |
| case QImage::Format_RGB16: |
| fill((uint) qConvertRgb32To16(color.rgba())); |
| break; |
| case QImage::Format_Indexed8: { |
| uint pixel = 0; |
| for (int i=0; i<d->colortable.size(); ++i) { |
| if (color.rgba() == d->colortable.at(i)) { |
| pixel = i; |
| break; |
| } |
| } |
| fill(pixel); |
| break; |
| } |
| case QImage::Format_Mono: |
| case QImage::Format_MonoLSB: |
| if (color == Qt::color1) |
| fill((uint) 1); |
| else |
| fill((uint) 0); |
| break; |
| case QImage::Format_RGBX64: { |
| QRgba64 c = color.rgba64(); |
| c.setAlpha(65535); |
| qt_rectfill<quint64>(reinterpret_cast<quint64*>(d->data), c, |
| 0, 0, d->width, d->height, d->bytes_per_line); |
| break; |
| |
| } |
| case QImage::Format_RGBA64: |
| case QImage::Format_RGBA64_Premultiplied: |
| qt_rectfill<quint64>(reinterpret_cast<quint64*>(d->data), color.rgba64(), |
| 0, 0, d->width, d->height, d->bytes_per_line); |
| break; |
| default: { |
| QPainter p(this); |
| p.setCompositionMode(QPainter::CompositionMode_Source); |
| p.fillRect(rect(), color); |
| }} |
| } |
| |
| |
| |
| /*! |
| Inverts all pixel values in the image. |
| |
| The given invert \a mode only have a meaning when the image's |
| depth is 32. The default \a mode is InvertRgb, which leaves the |
| alpha channel unchanged. If the \a mode is InvertRgba, the alpha |
| bits are also inverted. |
| |
| Inverting an 8-bit image means to replace all pixels using color |
| index \e i with a pixel using color index 255 minus \e i. The same |
| is the case for a 1-bit image. Note that the color table is \e not |
| changed. |
| |
| If the image has a premultiplied alpha channel, the image is first |
| converted to an unpremultiplied image format to be inverted and |
| then converted back. |
| |
| \sa {QImage#Image Transformations}{Image Transformations} |
| */ |
| |
| void QImage::invertPixels(InvertMode mode) |
| { |
| if (!d) |
| return; |
| |
| detach(); |
| |
| // In case detach() ran out of memory |
| if (!d) |
| return; |
| |
| QImage::Format originalFormat = d->format; |
| // Inverting premultiplied pixels would produce invalid image data. |
| if (hasAlphaChannel() && qPixelLayouts[d->format].premultiplied) { |
| if (depth() > 32) { |
| if (!d->convertInPlace(QImage::Format_RGBA64, 0)) |
| *this = convertToFormat(QImage::Format_RGBA64); |
| } else { |
| if (!d->convertInPlace(QImage::Format_ARGB32, 0)) |
| *this = convertToFormat(QImage::Format_ARGB32); |
| } |
| } |
| |
| if (depth() < 32) { |
| // This assumes no alpha-channel as the only formats with non-premultipled alpha are 32bit. |
| int bpl = (d->width * d->depth + 7) / 8; |
| int pad = d->bytes_per_line - bpl; |
| uchar *sl = d->data; |
| for (int y=0; y<d->height; ++y) { |
| for (int x=0; x<bpl; ++x) |
| *sl++ ^= 0xff; |
| sl += pad; |
| } |
| } |
| else if (depth() == 64) { |
| quint16 *p = (quint16*)d->data; |
| quint16 *end = (quint16*)(d->data + d->nbytes); |
| quint16 xorbits = 0xffff; |
| while (p < end) { |
| *p++ ^= xorbits; |
| *p++ ^= xorbits; |
| *p++ ^= xorbits; |
| if (mode == InvertRgba) |
| *p++ ^= xorbits; |
| else |
| p++; |
| } |
| } else { |
| quint32 *p = (quint32*)d->data; |
| quint32 *end = (quint32*)(d->data + d->nbytes); |
| quint32 xorbits = 0xffffffff; |
| switch (d->format) { |
| case QImage::Format_RGBA8888: |
| if (mode == InvertRgba) |
| break; |
| Q_FALLTHROUGH(); |
| case QImage::Format_RGBX8888: |
| #if Q_BYTE_ORDER == Q_BIG_ENDIAN |
| xorbits = 0xffffff00; |
| break; |
| #else |
| xorbits = 0x00ffffff; |
| break; |
| #endif |
| case QImage::Format_ARGB32: |
| if (mode == InvertRgba) |
| break; |
| Q_FALLTHROUGH(); |
| case QImage::Format_RGB32: |
| xorbits = 0x00ffffff; |
| break; |
| case QImage::Format_BGR30: |
| case QImage::Format_RGB30: |
| xorbits = 0x3fffffff; |
| break; |
| default: |
| Q_UNREACHABLE(); |
| xorbits = 0; |
| break; |
| } |
| while (p < end) |
| *p++ ^= xorbits; |
| } |
| |
| if (originalFormat != d->format) { |
| if (!d->convertInPlace(originalFormat, 0)) |
| *this = convertToFormat(originalFormat); |
| } |
| } |
| |
| // Windows defines these |
| #if defined(write) |
| # undef write |
| #endif |
| #if defined(close) |
| # undef close |
| #endif |
| #if defined(read) |
| # undef read |
| #endif |
| |
| /*! |
| \since 4.6 |
| Resizes the color table to contain \a colorCount entries. |
| |
| If the color table is expanded, all the extra colors will be set to |
| transparent (i.e qRgba(0, 0, 0, 0)). |
| |
| When the image is used, the color table must be large enough to |
| have entries for all the pixel/index values present in the image, |
| otherwise the results are undefined. |
| |
| \sa colorCount(), colorTable(), setColor(), {QImage#Image |
| Transformations}{Image Transformations} |
| */ |
| |
| void QImage::setColorCount(int colorCount) |
| { |
| if (!d) { |
| qWarning("QImage::setColorCount: null image"); |
| return; |
| } |
| |
| detach(); |
| |
| // In case detach() ran out of memory |
| if (!d) |
| return; |
| |
| if (colorCount == d->colortable.size()) |
| return; |
| if (colorCount <= 0) { // use no color table |
| d->colortable = QVector<QRgb>(); |
| return; |
| } |
| int nc = d->colortable.size(); |
| d->colortable.resize(colorCount); |
| for (int i = nc; i < colorCount; ++i) |
| d->colortable[i] = 0; |
| } |
| |
| /*! |
| Returns the format of the image. |
| |
| \sa {QImage#Image Formats}{Image Formats} |
| */ |
| QImage::Format QImage::format() const |
| { |
| return d ? d->format : Format_Invalid; |
| } |
| |
| /*! |
| \fn QImage QImage::convertToFormat(Format format, Qt::ImageConversionFlags flags) const & |
| \fn QImage QImage::convertToFormat(Format format, Qt::ImageConversionFlags flags) && |
| |
| Returns a copy of the image in the given \a format. |
| |
| The specified image conversion \a flags control how the image data |
| is handled during the conversion process. |
| |
| \sa {Image Formats} |
| */ |
| |
| /*! |
| \internal |
| */ |
| QImage QImage::convertToFormat_helper(Format format, Qt::ImageConversionFlags flags) const |
| { |
| if (!d || d->format == format) |
| return *this; |
| |
| if (format == Format_Invalid || d->format == Format_Invalid) |
| return QImage(); |
| |
| const QPixelLayout *destLayout = &qPixelLayouts[format]; |
| Image_Converter converter = qimage_converter_map[d->format][format]; |
| if (!converter && format > QImage::Format_Indexed8 && d->format > QImage::Format_Indexed8) { |
| if (qt_highColorPrecision(d->format, !destLayout->hasAlphaChannel) |
| && qt_highColorPrecision(format, !hasAlphaChannel())) { |
| converter = convert_generic_to_rgb64; |
| } else |
| converter = convert_generic; |
| } |
| if (converter) { |
| QImage image(d->width, d->height, format); |
| |
| QIMAGE_SANITYCHECK_MEMORY(image); |
| |
| image.d->offset = offset(); |
| copyMetadata(image.d, d); |
| |
| converter(image.d, d, flags); |
| return image; |
| } |
| |
| // Convert indexed formats over ARGB32 or RGB32 to the final format. |
| Q_ASSERT(format != QImage::Format_ARGB32 && format != QImage::Format_RGB32); |
| Q_ASSERT(d->format != QImage::Format_ARGB32 && d->format != QImage::Format_RGB32); |
| |
| if (!hasAlphaChannel()) |
| return convertToFormat(Format_RGB32, flags).convertToFormat(format, flags); |
| |
| return convertToFormat(Format_ARGB32, flags).convertToFormat(format, flags); |
| } |
| |
| /*! |
| \internal |
| */ |
| bool QImage::convertToFormat_inplace(Format format, Qt::ImageConversionFlags flags) |
| { |
| return d && d->convertInPlace(format, flags); |
| } |
| |
| static inline int pixel_distance(QRgb p1, QRgb p2) { |
| int r1 = qRed(p1); |
| int g1 = qGreen(p1); |
| int b1 = qBlue(p1); |
| int a1 = qAlpha(p1); |
| |
| int r2 = qRed(p2); |
| int g2 = qGreen(p2); |
| int b2 = qBlue(p2); |
| int a2 = qAlpha(p2); |
| |
| return abs(r1 - r2) + abs(g1 - g2) + abs(b1 - b2) + abs(a1 - a2); |
| } |
| |
| static inline int closestMatch(QRgb pixel, const QVector<QRgb> &clut) { |
| int idx = 0; |
| int current_distance = INT_MAX; |
| for (int i=0; i<clut.size(); ++i) { |
| int dist = pixel_distance(pixel, clut.at(i)); |
| if (dist < current_distance) { |
| current_distance = dist; |
| idx = i; |
| } |
| } |
| return idx; |
| } |
| |
| static QImage convertWithPalette(const QImage &src, QImage::Format format, |
| const QVector<QRgb> &clut) { |
| QImage dest(src.size(), format); |
| dest.setColorTable(clut); |
| |
| QString textsKeys = src.text(); |
| const auto textKeyList = textsKeys.splitRef(QLatin1Char('\n'), QString::SkipEmptyParts); |
| for (const auto &textKey : textKeyList) { |
| const auto textKeySplitted = textKey.split(QLatin1String(": ")); |
| dest.setText(textKeySplitted[0].toString(), textKeySplitted[1].toString()); |
| } |
| |
| int h = src.height(); |
| int w = src.width(); |
| |
| QHash<QRgb, int> cache; |
| |
| if (format == QImage::Format_Indexed8) { |
| for (int y=0; y<h; ++y) { |
| const QRgb *src_pixels = (const QRgb *) src.scanLine(y); |
| uchar *dest_pixels = (uchar *) dest.scanLine(y); |
| for (int x=0; x<w; ++x) { |
| int src_pixel = src_pixels[x]; |
| int value = cache.value(src_pixel, -1); |
| if (value == -1) { |
| value = closestMatch(src_pixel, clut); |
| cache.insert(src_pixel, value); |
| } |
| dest_pixels[x] = (uchar) value; |
| } |
| } |
| } else { |
| QVector<QRgb> table = clut; |
| table.resize(2); |
| for (int y=0; y<h; ++y) { |
| const QRgb *src_pixels = (const QRgb *) src.scanLine(y); |
| for (int x=0; x<w; ++x) { |
| int src_pixel = src_pixels[x]; |
| int value = cache.value(src_pixel, -1); |
| if (value == -1) { |
| value = closestMatch(src_pixel, table); |
| cache.insert(src_pixel, value); |
| } |
| dest.setPixel(x, y, value); |
| } |
| } |
| } |
| |
| return dest; |
| } |
| |
| /*! |
| \overload |
| |
| Returns a copy of the image converted to the given \a format, |
| using the specified \a colorTable. |
| |
| Conversion from RGB formats to indexed formats is a slow operation |
| and will use a straightforward nearest color approach, with no |
| dithering. |
| */ |
| QImage QImage::convertToFormat(Format format, const QVector<QRgb> &colorTable, Qt::ImageConversionFlags flags) const |
| { |
| if (!d || d->format == format) |
| return *this; |
| |
| if (format == QImage::Format_Invalid) |
| return QImage(); |
| if (format <= QImage::Format_Indexed8) |
| return convertWithPalette(convertToFormat(QImage::Format_ARGB32, flags), format, colorTable); |
| |
| return convertToFormat(format, flags); |
| } |
| |
| /*! |
| \since 5.9 |
| |
| Changes the format of the image to \a format without changing the |
| data. Only works between formats of the same depth. |
| |
| Returns \c true if successful. |
| |
| This function can be used to change images with alpha-channels to |
| their corresponding opaque formats if the data is known to be opaque-only, |
| or to change the format of a given image buffer before overwriting |
| it with new data. |
| |
| \warning The function does not check if the image data is valid in the |
| new format and will still return \c true if the depths are compatible. |
| Operations on an image with invalid data are undefined. |
| |
| \warning If the image is not detached, this will cause the data to be |
| copied. |
| |
| \sa hasAlphaChannel(), convertToFormat() |
| */ |
| |
| bool QImage::reinterpretAsFormat(Format format) |
| { |
| if (!d) |
| return false; |
| if (d->format == format) |
| return true; |
| if (qt_depthForFormat(format) != qt_depthForFormat(d->format)) |
| return false; |
| if (!isDetached()) { // Detach only if shared, not for read-only data. |
| QImageData *oldD = d; |
| detach(); |
| // In case detach() ran out of memory |
| if (!d) { |
| d = oldD; |
| return false; |
| } |
| } |
| |
| d->format = format; |
| return true; |
| } |
| |
| /*! |
| \since 5.13 |
| |
| Detach and convert the image to the given \a format in place. |
| |
| The specified image conversion \a flags control how the image data |
| is handled during the conversion process. |
| |
| \sa convertToFormat() |
| */ |
| |
| void QImage::convertTo(Format format, Qt::ImageConversionFlags flags) |
| { |
| if (!d || format == QImage::Format_Invalid) |
| return; |
| |
| detach(); |
| if (convertToFormat_inplace(format, flags)) |
| return; |
| |
| *this = convertToFormat_helper(format, flags); |
| } |
| |
| /*! |
| \fn bool QImage::valid(const QPoint &pos) const |
| |
| Returns \c true if \a pos is a valid coordinate pair within the |
| image; otherwise returns \c false. |
| |
| \sa rect(), QRect::contains() |
| */ |
| |
| /*! |
| \overload |
| |
| Returns \c true if QPoint(\a x, \a y) is a valid coordinate pair |
| within the image; otherwise returns \c false. |
| */ |
| bool QImage::valid(int x, int y) const |
| { |
| return d |
| && x >= 0 && x < d->width |
| && y >= 0 && y < d->height; |
| } |
| |
| /*! |
| \fn int QImage::pixelIndex(const QPoint &position) const |
| |
| Returns the pixel index at the given \a position. |
| |
| If \a position is not valid, or if the image is not a paletted |
| image (depth() > 8), the results are undefined. |
| |
| \sa valid(), depth(), {QImage#Pixel Manipulation}{Pixel Manipulation} |
| */ |
| |
| /*! |
| \overload |
| |
| Returns the pixel index at (\a x, \a y). |
| */ |
| int QImage::pixelIndex(int x, int y) const |
| { |
| if (!d || x < 0 || x >= d->width || y < 0 || y >= height()) { |
| qWarning("QImage::pixelIndex: coordinate (%d,%d) out of range", x, y); |
| return -12345; |
| } |
| const uchar * s = scanLine(y); |
| switch(d->format) { |
| case Format_Mono: |
| return (*(s + (x >> 3)) >> (7- (x & 7))) & 1; |
| case Format_MonoLSB: |
| return (*(s + (x >> 3)) >> (x & 7)) & 1; |
| case Format_Indexed8: |
| return (int)s[x]; |
| default: |
| qWarning("QImage::pixelIndex: Not applicable for %d-bpp images (no palette)", d->depth); |
| } |
| return 0; |
| } |
| |
| |
| /*! |
| \fn QRgb QImage::pixel(const QPoint &position) const |
| |
| Returns the color of the pixel at the given \a position. |
| |
| If the \a position is not valid, the results are undefined. |
| |
| \warning This function is expensive when used for massive pixel |
| manipulations. Use constBits() or constScanLine() when many |
| pixels needs to be read. |
| |
| \sa setPixel(), valid(), constBits(), constScanLine(), {QImage#Pixel Manipulation}{Pixel |
| Manipulation} |
| */ |
| |
| /*! |
| \overload |
| |
| Returns the color of the pixel at coordinates (\a x, \a y). |
| */ |
| QRgb QImage::pixel(int x, int y) const |
| { |
| if (!d || x < 0 || x >= d->width || y < 0 || y >= d->height) { |
| qWarning("QImage::pixel: coordinate (%d,%d) out of range", x, y); |
| return 12345; |
| } |
| |
| const uchar *s = d->data + y * d->bytes_per_line; |
| |
| int index = -1; |
| switch (d->format) { |
| case Format_Mono: |
| index = (*(s + (x >> 3)) >> (~x & 7)) & 1; |
| break; |
| case Format_MonoLSB: |
| index = (*(s + (x >> 3)) >> (x & 7)) & 1; |
| break; |
| case Format_Indexed8: |
| index = s[x]; |
| break; |
| default: |
| break; |
| } |
| if (index >= 0) { // Indexed format |
| if (index >= d->colortable.size()) { |
| qWarning("QImage::pixel: color table index %d out of range.", index); |
| return 0; |
| } |
| return d->colortable.at(index); |
| } |
| |
| switch (d->format) { |
| case Format_RGB32: |
| return 0xff000000 | reinterpret_cast<const QRgb *>(s)[x]; |
| case Format_ARGB32: // Keep old behaviour. |
| case Format_ARGB32_Premultiplied: |
| return reinterpret_cast<const QRgb *>(s)[x]; |
| case Format_RGBX8888: |
| case Format_RGBA8888: // Match ARGB32 behavior. |
| case Format_RGBA8888_Premultiplied: |
| return RGBA2ARGB(reinterpret_cast<const quint32 *>(s)[x]); |
| case Format_BGR30: |
| case Format_A2BGR30_Premultiplied: |
| return qConvertA2rgb30ToArgb32<PixelOrderBGR>(reinterpret_cast<const quint32 *>(s)[x]); |
| case Format_RGB30: |
| case Format_A2RGB30_Premultiplied: |
| return qConvertA2rgb30ToArgb32<PixelOrderRGB>(reinterpret_cast<const quint32 *>(s)[x]); |
| case Format_RGB16: |
| return qConvertRgb16To32(reinterpret_cast<const quint16 *>(s)[x]); |
| case Format_RGBX64: |
| case Format_RGBA64: // Match ARGB32 behavior. |
| case Format_RGBA64_Premultiplied: |
| return reinterpret_cast<const QRgba64 *>(s)[x].toArgb32(); |
| default: |
| break; |
| } |
| const QPixelLayout *layout = &qPixelLayouts[d->format]; |
| uint result; |
| return *layout->fetchToARGB32PM(&result, s, x, 1, nullptr, nullptr); |
| } |
| |
| /*! |
| \fn void QImage::setPixel(const QPoint &position, uint index_or_rgb) |
| |
| Sets the pixel index or color at the given \a position to \a |
| index_or_rgb. |
| |
| If the image's format is either monochrome or paletted, the given \a |
| index_or_rgb value must be an index in the image's color table, |
| otherwise the parameter must be a QRgb value. |
| |
| If \a position is not a valid coordinate pair in the image, or if |
| \a index_or_rgb >= colorCount() in the case of monochrome and |
| paletted images, the result is undefined. |
| |
| \warning This function is expensive due to the call of the internal |
| \c{detach()} function called within; if performance is a concern, we |
| recommend the use of scanLine() or bits() to access pixel data directly. |
| |
| \sa pixel(), {QImage#Pixel Manipulation}{Pixel Manipulation} |
| */ |
| |
| /*! |
| \overload |
| |
| Sets the pixel index or color at (\a x, \a y) to \a index_or_rgb. |
| */ |
| void QImage::setPixel(int x, int y, uint index_or_rgb) |
| { |
| if (!d || x < 0 || x >= width() || y < 0 || y >= height()) { |
| qWarning("QImage::setPixel: coordinate (%d,%d) out of range", x, y); |
| return; |
| } |
| // detach is called from within scanLine |
| uchar * s = scanLine(y); |
| switch(d->format) { |
| case Format_Mono: |
| case Format_MonoLSB: |
| if (index_or_rgb > 1) { |
| qWarning("QImage::setPixel: Index %d out of range", index_or_rgb); |
| } else if (format() == Format_MonoLSB) { |
| if (index_or_rgb==0) |
| *(s + (x >> 3)) &= ~(1 << (x & 7)); |
| else |
| *(s + (x >> 3)) |= (1 << (x & 7)); |
| } else { |
| if (index_or_rgb==0) |
| *(s + (x >> 3)) &= ~(1 << (7-(x & 7))); |
| else |
| *(s + (x >> 3)) |= (1 << (7-(x & 7))); |
| } |
| return; |
| case Format_Indexed8: |
| if (index_or_rgb >= (uint)d->colortable.size()) { |
| qWarning("QImage::setPixel: Index %d out of range", index_or_rgb); |
| return; |
| } |
| s[x] = index_or_rgb; |
| return; |
| case Format_RGB32: |
| //make sure alpha is 255, we depend on it in qdrawhelper for cases |
| // when image is set as a texture pattern on a qbrush |
| ((uint *)s)[x] = 0xff000000 | index_or_rgb; |
| return; |
| case Format_ARGB32: |
| case Format_ARGB32_Premultiplied: |
| ((uint *)s)[x] = index_or_rgb; |
| return; |
| case Format_RGB16: |
| ((quint16 *)s)[x] = qConvertRgb32To16(qUnpremultiply(index_or_rgb)); |
| return; |
| case Format_RGBX8888: |
| ((uint *)s)[x] = ARGB2RGBA(0xff000000 | index_or_rgb); |
| return; |
| case Format_RGBA8888: |
| case Format_RGBA8888_Premultiplied: |
| ((uint *)s)[x] = ARGB2RGBA(index_or_rgb); |
| return; |
| case Format_BGR30: |
| ((uint *)s)[x] = qConvertRgb32ToRgb30<PixelOrderBGR>(index_or_rgb); |
| return; |
| case Format_A2BGR30_Premultiplied: |
| ((uint *)s)[x] = qConvertArgb32ToA2rgb30<PixelOrderBGR>(index_or_rgb); |
| return; |
| case Format_RGB30: |
| ((uint *)s)[x] = qConvertRgb32ToRgb30<PixelOrderRGB>(index_or_rgb); |
| return; |
| case Format_A2RGB30_Premultiplied: |
| ((uint *)s)[x] = qConvertArgb32ToA2rgb30<PixelOrderRGB>(index_or_rgb); |
| return; |
| case Format_Invalid: |
| case NImageFormats: |
| Q_ASSERT(false); |
| return; |
| default: |
| break; |
| } |
| |
| const QPixelLayout *layout = &qPixelLayouts[d->format]; |
| layout->storeFromARGB32PM(s, &index_or_rgb, x, 1, nullptr, nullptr); |
| } |
| |
| /*! |
| \fn QColor QImage::pixelColor(const QPoint &position) const |
| \since 5.6 |
| |
| Returns the color of the pixel at the given \a position as a QColor. |
| |
| If the \a position is not valid, an invalid QColor is returned. |
| |
| \warning This function is expensive when used for massive pixel |
| manipulations. Use constBits() or constScanLine() when many |
| pixels needs to be read. |
| |
| \sa setPixel(), valid(), constBits(), constScanLine(), {QImage#Pixel Manipulation}{Pixel |
| Manipulation} |
| */ |
| |
| /*! |
| \overload |
| \since 5.6 |
| |
| Returns the color of the pixel at coordinates (\a x, \a y) as a QColor. |
| */ |
| QColor QImage::pixelColor(int x, int y) const |
| { |
| if (!d || x < 0 || x >= d->width || y < 0 || y >= height()) { |
| qWarning("QImage::pixelColor: coordinate (%d,%d) out of range", x, y); |
| return QColor(); |
| } |
| |
| QRgba64 c; |
| const uchar * s = constScanLine(y); |
| switch (d->format) { |
| case Format_BGR30: |
| case Format_A2BGR30_Premultiplied: |
| c = qConvertA2rgb30ToRgb64<PixelOrderBGR>(reinterpret_cast<const quint32 *>(s)[x]); |
| break; |
| case Format_RGB30: |
| case Format_A2RGB30_Premultiplied: |
| c = qConvertA2rgb30ToRgb64<PixelOrderRGB>(reinterpret_cast<const quint32 *>(s)[x]); |
| break; |
| case Format_RGBX64: |
| case Format_RGBA64: |
| case Format_RGBA64_Premultiplied: |
| c = reinterpret_cast<const QRgba64 *>(s)[x]; |
| break; |
| case Format_Grayscale16: { |
| quint16 v = reinterpret_cast<const quint16 *>(s)[x]; |
| return QColor(qRgba64(v, v, v, 0xffff)); |
| } |
| default: |
| c = QRgba64::fromArgb32(pixel(x, y)); |
| break; |
| } |
| // QColor is always unpremultiplied |
| if (hasAlphaChannel() && qPixelLayouts[d->format].premultiplied) |
| c = c.unpremultiplied(); |
| return QColor(c); |
| } |
| |
| /*! |
| \fn void QImage::setPixelColor(const QPoint &position, const QColor &color) |
| \since 5.6 |
| |
| Sets the color at the given \a position to \a color. |
| |
| If \a position is not a valid coordinate pair in the image, or |
| the image's format is either monochrome or paletted, the result is undefined. |
| |
| \warning This function is expensive due to the call of the internal |
| \c{detach()} function called within; if performance is a concern, we |
| recommend the use of scanLine() or bits() to access pixel data directly. |
| |
| \sa pixel(), bits(), scanLine(), {QImage#Pixel Manipulation}{Pixel Manipulation} |
| */ |
| |
| /*! |
| \overload |
| \since 5.6 |
| |
| Sets the pixel color at (\a x, \a y) to \a color. |
| */ |
| void QImage::setPixelColor(int x, int y, const QColor &color) |
| { |
| if (!d || x < 0 || x >= width() || y < 0 || y >= height()) { |
| qWarning("QImage::setPixelColor: coordinate (%d,%d) out of range", x, y); |
| return; |
| } |
| |
| if (!color.isValid()) { |
| qWarning("QImage::setPixelColor: color is invalid"); |
| return; |
| } |
| |
| // QColor is always unpremultiplied |
| QRgba64 c = color.rgba64(); |
| if (!hasAlphaChannel()) |
| c.setAlpha(65535); |
| else if (qPixelLayouts[d->format].premultiplied) |
| c = c.premultiplied(); |
| // detach is called from within scanLine |
| uchar * s = scanLine(y); |
| switch (d->format) { |
| case Format_Mono: |
| case Format_MonoLSB: |
| case Format_Indexed8: |
| qWarning("QImage::setPixelColor: called on monochrome or indexed format"); |
| return; |
| case Format_BGR30: |
| ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderBGR>(c) | 0xc0000000; |
| return; |
| case Format_A2BGR30_Premultiplied: |
| ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderBGR>(c); |
| return; |
| case Format_RGB30: |
| ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderRGB>(c) | 0xc0000000; |
| return; |
| case Format_A2RGB30_Premultiplied: |
| ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderRGB>(c); |
| return; |
| case Format_RGBX64: |
| ((QRgba64 *)s)[x] = color.rgba64(); |
| ((QRgba64 *)s)[x].setAlpha(65535); |
| return; |
| case Format_RGBA64: |
| case Format_RGBA64_Premultiplied: |
| ((QRgba64 *)s)[x] = color.rgba64(); |
| return; |
| default: |
| setPixel(x, y, c.toArgb32()); |
| return; |
| } |
| } |
| |
| /*! |
| Returns \c true if all the colors in the image are shades of gray |
| (i.e. their red, green and blue components are equal); otherwise |
| false. |
| |
| Note that this function is slow for images without color table. |
| |
| \sa isGrayscale() |
| */ |
| bool QImage::allGray() const |
| { |
| if (!d) |
| return true; |
| |
| switch (d->format) { |
| case Format_Mono: |
| case Format_MonoLSB: |
| case Format_Indexed8: |
| for (int i = 0; i < d->colortable.size(); ++i) { |
| if (!qIsGray(d->colortable.at(i))) |
| return false; |
| } |
| return true; |
| case Format_Alpha8: |
| return false; |
| case Format_Grayscale8: |
| case Format_Grayscale16: |
| return true; |
| case Format_RGB32: |
| case Format_ARGB32: |
| case Format_ARGB32_Premultiplied: |
| #if Q_BYTE_ORDER == Q_LITTLE_ENDIAN |
| case Format_RGBX8888: |
| case Format_RGBA8888: |
| case Format_RGBA8888_Premultiplied: |
| #endif |
| for (int j = 0; j < d->height; ++j) { |
| const QRgb *b = (const QRgb *)constScanLine(j); |
| for (int i = 0; i < d->width; ++i) { |
| if (!qIsGray(b[i])) |
| return false; |
| } |
| } |
| return true; |
| case Format_RGB16: |
| for (int j = 0; j < d->height; ++j) { |
| const quint16 *b = (const quint16 *)constScanLine(j); |
| for (int i = 0; i < d->width; ++i) { |
| if (!qIsGray(qConvertRgb16To32(b[i]))) |
| return false; |
| } |
| } |
| return true; |
| default: |
| break; |
| } |
| |
| uint buffer[BufferSize]; |
| const QPixelLayout *layout = &qPixelLayouts[d->format]; |
| const auto fetch = layout->fetchToARGB32PM; |
| for (int j = 0; j < d->height; ++j) { |
| const uchar *b = constScanLine(j); |
| int x = 0; |
| while (x < d->width) { |
| int l = qMin(d->width - x, BufferSize); |
| const uint *ptr = fetch(buffer, b, x, l, nullptr, nullptr); |
| for (int i = 0; i < l; ++i) { |
| if (!qIsGray(ptr[i])) |
| return false; |
| } |
| x += l; |
| } |
| } |
| return true; |
| } |
| |
| /*! |
| For 32-bit images, this function is equivalent to allGray(). |
| |
| For color indexed images, this function returns \c true if |
| color(i) is QRgb(i, i, i) for all indexes of the color table; |
| otherwise returns \c false. |
| |
| \sa allGray(), {QImage#Image Formats}{Image Formats} |
| */ |
| bool QImage::isGrayscale() const |
| { |
| if (!d) |
| return false; |
| |
| if (d->format == QImage::Format_Alpha8) |
| return false; |
| |
| if (d->format == QImage::Format_Grayscale8 || d->format == QImage::Format_Grayscale16) |
| return true; |
| |
| switch (depth()) { |
| case 32: |
| case 24: |
| case 16: |
| return allGray(); |
| case 8: { |
| Q_ASSERT(d->format == QImage::Format_Indexed8); |
| for (int i = 0; i < colorCount(); i++) |
| if (d->colortable.at(i) != qRgb(i,i,i)) |
| return false; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /*! |
| \fn QImage QImage::scaled(int width, int height, Qt::AspectRatioMode aspectRatioMode, |
| Qt::TransformationMode transformMode) const |
| \overload |
| |
| Returns a copy of the image scaled to a rectangle with the given |
| \a width and \a height according to the given \a aspectRatioMode |
| and \a transformMode. |
| |
| If either the \a width or the \a height is zero or negative, this |
| function returns a null image. |
| */ |
| |
| /*! |
| \fn QImage QImage::scaled(const QSize &size, Qt::AspectRatioMode aspectRatioMode, |
| Qt::TransformationMode transformMode) const |
| |
| Returns a copy of the image scaled to a rectangle defined by the |
| given \a size according to the given \a aspectRatioMode and \a |
| transformMode. |
| |
| \image qimage-scaling.png |
| |
| \list |
| \li If \a aspectRatioMode is Qt::IgnoreAspectRatio, the image |
| is scaled to \a size. |
| \li If \a aspectRatioMode is Qt::KeepAspectRatio, the image is |
| scaled to a rectangle as large as possible inside \a size, preserving the aspect ratio. |
| \li If \a aspectRatioMode is Qt::KeepAspectRatioByExpanding, |
| the image is scaled to a rectangle as small as possible |
| outside \a size, preserving the aspect ratio. |
| \endlist |
| |
| If the given \a size is empty, this function returns a null image. |
| |
| \sa isNull(), {QImage#Image Transformations}{Image |
| Transformations} |
| */ |
| QImage QImage::scaled(const QSize& s, Qt::AspectRatioMode aspectMode, Qt::TransformationMode mode) const |
| { |
| if (!d) { |
| qWarning("QImage::scaled: Image is a null image"); |
| return QImage(); |
| } |
| if (s.isEmpty()) |
| return QImage(); |
| |
| QSize newSize = size(); |
| newSize.scale(s, aspectMode); |
| newSize.rwidth() = qMax(newSize.width(), 1); |
| newSize.rheight() = qMax(newSize.height(), 1); |
| if (newSize == size()) |
| return *this; |
| |
| QTransform wm = QTransform::fromScale((qreal)newSize.width() / width(), (qreal)newSize.height() / height()); |
| QImage img = transformed(wm, mode); |
| return img; |
| } |
| |
| /*! |
| \fn QImage QImage::scaledToWidth(int width, Qt::TransformationMode mode) const |
| |
| Returns a scaled copy of the image. The returned image is scaled |
| to the given \a width using the specified transformation \a |
| mode. |
| |
| This function automatically calculates the height of the image so |
| that its aspect ratio is preserved. |
| |
| If the given \a width is 0 or negative, a null image is returned. |
| |
| \sa {QImage#Image Transformations}{Image Transformations} |
| */ |
| QImage QImage::scaledToWidth(int w, Qt::TransformationMode mode) const |
| { |
| if (!d) { |
| qWarning("QImage::scaleWidth: Image is a null image"); |
| return QImage(); |
| } |
| if (w <= 0) |
| return QImage(); |
| |
| qreal factor = (qreal) w / width(); |
| QTransform wm = QTransform::fromScale(factor, factor); |
| return transformed(wm, mode); |
| } |
| |
| /*! |
| \fn QImage QImage::scaledToHeight(int height, Qt::TransformationMode mode) const |
| |
| Returns a scaled copy of the image. The returned image is scaled |
| to the given \a height using the specified transformation \a |
| mode. |
| |
| This function automatically calculates the width of the image so that |
| the ratio of the image is preserved. |
| |
| If the given \a height is 0 or negative, a null image is returned. |
| |
| \sa {QImage#Image Transformations}{Image Transformations} |
| */ |
| QImage QImage::scaledToHeight(int h, Qt::TransformationMode mode) const |
| { |
| if (!d) { |
| qWarning("QImage::scaleHeight: Image is a null image"); |
| return QImage(); |
| } |
| if (h <= 0) |
| return QImage(); |
| |
| qreal factor = (qreal) h / height(); |
| QTransform wm = QTransform::fromScale(factor, factor); |
| return transformed(wm, mode); |
| } |
| |
| |
| /*! |
| \fn QMatrix QImage::trueMatrix(const QMatrix &matrix, int width, int height) |
| |
| Returns the actual matrix used for transforming an image with the |
| given \a width, \a height and \a matrix. |
| |
| When transforming an image using the transformed() function, the |
| transformation matrix is internally adjusted to compensate for |
| unwanted translation, i.e. transformed() returns the smallest |
| image containing all transformed points of the original image. |
| This function returns the modified matrix, which maps points |
| correctly from the original image into the new image. |
| |
| \sa transformed(), {QImage#Image Transformations}{Image |
| Transformations} |
| */ |
| QMatrix QImage::trueMatrix(const QMatrix &matrix, int w, int h) |
| { |
| return trueMatrix(QTransform(matrix), w, h).toAffine(); |
| } |
| |
| /*! |
| Returns a copy of the image that is transformed using the given |
| transformation \a matrix and transformation \a mode. |
| |
| The returned image will normally have the same {Image Formats}{format} as |
| the original image. However, a complex transformation may result in an |
| image where not all pixels are covered by the transformed pixels of the |
| original image. In such cases, those background pixels will be assigned a |
| transparent color value, and the transformed image will be given a format |
| with an alpha channel, even if the orginal image did not have that. |
| |
| The transformation \a matrix is internally adjusted to compensate |
| for unwanted translation; i.e. the image produced is the smallest |
| image that contains all the transformed points of the original |
| image. Use the trueMatrix() function to retrieve the actual matrix |
| used for transforming an image. |
| |
| \sa trueMatrix(), {QImage#Image Transformations}{Image |
| Transformations} |
| */ |
| QImage QImage::transformed(const QMatrix &matrix, Qt::TransformationMode mode) const |
| { |
| return transformed(QTransform(matrix), mode); |
| } |
| |
| /*! |
| Builds and returns a 1-bpp mask from the alpha buffer in this |
| image. Returns a null image if the image's format is |
| QImage::Format_RGB32. |
| |
| The \a flags argument is a bitwise-OR of the |
| Qt::ImageConversionFlags, and controls the conversion |
| process. Passing 0 for flags sets all the default options. |
| |
| The returned image has little-endian bit order (i.e. the image's |
| format is QImage::Format_MonoLSB), which you can convert to |
| big-endian (QImage::Format_Mono) using the convertToFormat() |
| function. |
| |
| \sa createHeuristicMask(), {QImage#Image Transformations}{Image |
| Transformations} |
| */ |
| QImage QImage::createAlphaMask(Qt::ImageConversionFlags flags) const |
| { |
| if (!d || d->format == QImage::Format_RGB32) |
| return QImage(); |
| |
| if (d->depth == 1) { |
| // A monochrome pixmap, with alpha channels on those two colors. |
| // Pretty unlikely, so use less efficient solution. |
| return convertToFormat(Format_Indexed8, flags).createAlphaMask(flags); |
| } |
| |
| QImage mask(d->width, d->height, Format_MonoLSB); |
| if (!mask.isNull()) { |
| dither_to_Mono(mask.d, d, flags, true); |
| copyPhysicalMetadata(mask.d, d); |
| } |
| return mask; |
| } |
| |
| #ifndef QT_NO_IMAGE_HEURISTIC_MASK |
| /*! |
| Creates and returns a 1-bpp heuristic mask for this image. |
| |
| The function works by selecting a color from one of the corners, |
| then chipping away pixels of that color starting at all the edges. |
| The four corners vote for which color is to be masked away. In |
| case of a draw (this generally means that this function is not |
| applicable to the image), the result is arbitrary. |
| |
| The returned image has little-endian bit order (i.e. the image's |
| format is QImage::Format_MonoLSB), which you can convert to |
| big-endian (QImage::Format_Mono) using the convertToFormat() |
| function. |
| |
| If \a clipTight is true (the default) the mask is just large |
| enough to cover the pixels; otherwise, the mask is larger than the |
| data pixels. |
| |
| Note that this function disregards the alpha buffer. |
| |
| \sa createAlphaMask(), {QImage#Image Transformations}{Image |
| Transformations} |
| */ |
| |
| QImage QImage::createHeuristicMask(bool clipTight) const |
| { |
| if (!d) |
| return QImage(); |
| |
| if (d->depth != 32) { |
| QImage img32 = convertToFormat(Format_RGB32); |
| return img32.createHeuristicMask(clipTight); |
| } |
| |
| #define PIX(x,y) (*((const QRgb*)scanLine(y)+x) & 0x00ffffff) |
| |
| int w = width(); |
| int h = height(); |
| QImage m(w, h, Format_MonoLSB); |
| QIMAGE_SANITYCHECK_MEMORY(m); |
| m.setColorCount(2); |
| m.setColor(0, QColor(Qt::color0).rgba()); |
| m.setColor(1, QColor(Qt::color1).rgba()); |
| m.fill(0xff); |
| |
| QRgb background = PIX(0,0); |
| if (background != PIX(w-1,0) && |
| background != PIX(0,h-1) && |
| background != PIX(w-1,h-1)) { |
| background = PIX(w-1,0); |
| if (background != PIX(w-1,h-1) && |
| background != PIX(0,h-1) && |
| PIX(0,h-1) == PIX(w-1,h-1)) { |
| background = PIX(w-1,h-1); |
| } |
| } |
| |
| int x,y; |
| bool done = false; |
| uchar *ypp, *ypc, *ypn; |
| while(!done) { |
| done = true; |
| ypn = m.scanLine(0); |
| ypc = 0; |
| for (y = 0; y < h; y++) { |
| ypp = ypc; |
| ypc = ypn; |
| ypn = (y == h-1) ? 0 : m.scanLine(y+1); |
| const QRgb *p = (const QRgb *)scanLine(y); |
| for (x = 0; x < w; x++) { |
| // slowness here - it's possible to do six of these tests |
| // together in one go. oh well. |
| if ((x == 0 || y == 0 || x == w-1 || y == h-1 || |
| !(*(ypc + ((x-1) >> 3)) & (1 << ((x-1) & 7))) || |
| !(*(ypc + ((x+1) >> 3)) & (1 << ((x+1) & 7))) || |
| !(*(ypp + (x >> 3)) & (1 << (x & 7))) || |
| !(*(ypn + (x >> 3)) & (1 << (x & 7)))) && |
| ( (*(ypc + (x >> 3)) & (1 << (x & 7)))) && |
| ((*p & 0x00ffffff) == background)) { |
| done = false; |
| *(ypc + (x >> 3)) &= ~(1 << (x & 7)); |
| } |
| p++; |
| } |
| } |
| } |
| |
| if (!clipTight) { |
| ypn = m.scanLine(0); |
| ypc = 0; |
| for (y = 0; y < h; y++) { |
| ypp = ypc; |
| ypc = ypn; |
| ypn = (y == h-1) ? 0 : m.scanLine(y+1); |
| const QRgb *p = (const QRgb *)scanLine(y); |
| for (x = 0; x < w; x++) { |
| if ((*p & 0x00ffffff) != background) { |
| if (x > 0) |
| *(ypc + ((x-1) >> 3)) |= (1 << ((x-1) & 7)); |
| if (x < w-1) |
| *(ypc + ((x+1) >> 3)) |= (1 << ((x+1) & 7)); |
| if (y > 0) |
| *(ypp + (x >> 3)) |= (1 << (x & 7)); |
| if (y < h-1) |
| *(ypn + (x >> 3)) |= (1 << (x & 7)); |
| } |
| p++; |
| } |
| } |
| } |
| |
| #undef PIX |
| |
| copyPhysicalMetadata(m.d, d); |
| return m; |
| } |
| #endif //QT_NO_IMAGE_HEURISTIC_MASK |
| |
| /*! |
| Creates and returns a mask for this image based on the given \a |
| color value. If the \a mode is MaskInColor (the default value), |
| all pixels matching \a color will be opaque pixels in the mask. If |
| \a mode is MaskOutColor, all pixels matching the given color will |
| be transparent. |
| |
| \sa createAlphaMask(), createHeuristicMask() |
| */ |
| |
| QImage QImage::createMaskFromColor(QRgb color, Qt::MaskMode mode) const |
| { |
| if (!d) |
| return QImage(); |
| QImage maskImage(size(), QImage::Format_MonoLSB); |
| QIMAGE_SANITYCHECK_MEMORY(maskImage); |
| maskImage.fill(0); |
| uchar *s = maskImage.bits(); |
| |
| if (depth() == 32) { |
| for (int h = 0; h < d->height; h++) { |
| const uint *sl = (const uint *) scanLine(h); |
| for (int w = 0; w < d->width; w++) { |
| if (sl[w] == color) |
| *(s + (w >> 3)) |= (1 << (w & 7)); |
| } |
| s += maskImage.bytesPerLine(); |
| } |
| } else { |
| for (int h = 0; h < d->height; h++) { |
| for (int w = 0; w < d->width; w++) { |
| if ((uint) pixel(w, h) == color) |
| *(s + (w >> 3)) |= (1 << (w & 7)); |
| } |
| s += maskImage.bytesPerLine(); |
| } |
| } |
| if (mode == Qt::MaskOutColor) |
| maskImage.invertPixels(); |
| |
| copyPhysicalMetadata(maskImage.d, d); |
| return maskImage; |
| } |
| |
| /*! |
| \fn QImage QImage::mirrored(bool horizontal = false, bool vertical = true) const & |
| \fn QImage QImage::mirrored(bool horizontal = false, bool vertical = true) && |
| |
| Returns a mirror of the image, mirrored in the horizontal and/or |
| the vertical direction depending on whether \a horizontal and \a |
| vertical are set to true or false. |
| |
| Note that the original image is not changed. |
| |
| \sa {QImage#Image Transformations}{Image Transformations} |
| */ |
| |
| template<class T> inline void do_mirror_data(QImageData *dst, QImageData *src, |
| int dstX0, int dstY0, |
| int dstXIncr, int dstYIncr, |
| int w, int h) |
| { |
| if (dst == src) { |
| // When mirroring in-place, stop in the middle for one of the directions, since we |
| // are swapping the bytes instead of merely copying. |
| const int srcXEnd = (dstX0 && !dstY0) ? w / 2 : w; |
| const int srcYEnd = dstY0 ? h / 2 : h; |
| for (int srcY = 0, dstY = dstY0; srcY < srcYEnd; ++srcY, dstY += dstYIncr) { |
| T *srcPtr = (T *) (src->data + srcY * src->bytes_per_line); |
| T *dstPtr = (T *) (dst->data + dstY * dst->bytes_per_line); |
| for (int srcX = 0, dstX = dstX0; srcX < srcXEnd; ++srcX, dstX += dstXIncr) |
| std::swap(srcPtr[srcX], dstPtr[dstX]); |
| } |
| // If mirroring both ways, the middle line needs to be mirrored horizontally only. |
| if (dstX0 && dstY0 && (h & 1)) { |
| int srcY = h / 2; |
| int srcXEnd2 = w / 2; |
| T *srcPtr = (T *) (src->data + srcY * src->bytes_per_line); |
| for (int srcX = 0, dstX = dstX0; srcX < srcXEnd2; ++srcX, dstX += dstXIncr) |
| std::swap(srcPtr[srcX], srcPtr[dstX]); |
| } |
| } else { |
| for (int srcY = 0, dstY = dstY0; srcY < h; ++srcY, dstY += dstYIncr) { |
| T *srcPtr = (T *) (src->data + srcY * src->bytes_per_line); |
| T *dstPtr = (T *) (dst->data + dstY * dst->bytes_per_line); |
| for (int srcX = 0, dstX = dstX0; srcX < w; ++srcX, dstX += dstXIncr) |
| dstPtr[dstX] = srcPtr[srcX]; |
| } |
| } |
| } |
| |
| inline void do_flip(QImageData *dst, QImageData *src, int w, int h, int depth) |
| { |
| const int data_bytes_per_line = w * (depth / 8); |
| if (dst == src) { |
| uint *srcPtr = reinterpret_cast<uint *>(src->data); |
| uint *dstPtr = reinterpret_cast<uint *>(dst->data + (h - 1) * dst->bytes_per_line); |
| h = h / 2; |
| const int uint_per_line = (data_bytes_per_line + 3) >> 2; // bytes per line must be a multiple of 4 |
| for (int y = 0; y < h; ++y) { |
| // This is auto-vectorized, no need for SSE2 or NEON versions: |
| for (int x = 0; x < uint_per_line; x++) { |
| const uint d = dstPtr[x]; |
| const uint s = srcPtr[x]; |
| dstPtr[x] = s; |
| srcPtr[x] = d; |
| } |
| srcPtr += src->bytes_per_line >> 2; |
| dstPtr -= dst->bytes_per_line >> 2; |
| } |
| |
| } else { |
| const uchar *srcPtr = src->data; |
| uchar *dstPtr = dst->data + (h - 1) * dst->bytes_per_line; |
| for (int y = 0; y < h; ++y) { |
| memcpy(dstPtr, srcPtr, data_bytes_per_line); |
| srcPtr += src->bytes_per_line; |
| dstPtr -= dst->bytes_per_line; |
| } |
| } |
| } |
| |
| inline void do_mirror(QImageData *dst, QImageData *src, bool horizontal, bool vertical) |
| { |
| Q_ASSERT(src->width == dst->width && src->height == dst->height && src->depth == dst->depth); |
| int w = src->width; |
| int h = src->height; |
| int depth = src->depth; |
| |
| if (src->depth == 1) { |
| w = (w + 7) / 8; // byte aligned width |
| depth = 8; |
| } |
| |
| if (vertical && !horizontal) { |
| // This one is simple and common, so do it a little more optimized |
| do_flip(dst, src, w, h, depth); |
| return; |
| } |
| |
| int dstX0 = 0, dstXIncr = 1; |
| int dstY0 = 0, dstYIncr = 1; |
| if (horizontal) { |
| // 0 -> w-1, 1 -> w-2, 2 -> w-3, ... |
| dstX0 = w - 1; |
| dstXIncr = -1; |
| } |
| if (vertical) { |
| // 0 -> h-1, 1 -> h-2, 2 -> h-3, ... |
| dstY0 = h - 1; |
| dstYIncr = -1; |
| } |
| |
| switch (depth) { |
| case 64: |
| do_mirror_data<quint64>(dst, src, dstX0, dstY0, dstXIncr, dstYIncr, w, h); |
| break; |
| case 32: |
| do_mirror_data<quint32>(dst, src, dstX0, dstY0, dstXIncr, dstYIncr, w, h); |
| break; |
| case 24: |
| do_mirror_data<quint24>(dst, src, dstX0, dstY0, dstXIncr, dstYIncr, w, h); |
| break; |
| case 16: |
| do_mirror_data<quint16>(dst, src, dstX0, dstY0, dstXIncr, dstYIncr, w, h); |
| break; |
| case 8: |
| do_mirror_data<quint8>(dst, src, dstX0, dstY0, dstXIncr, dstYIncr, w, h); |
| break; |
| default: |
| Q_ASSERT(false); |
| break; |
| } |
| |
| // The bytes are now all in the correct place. In addition, the bits in the individual |
| // bytes have to be flipped too when horizontally mirroring a 1 bit-per-pixel image. |
| if (horizontal && dst->depth == 1) { |
| Q_ASSERT(dst->format == QImage::Format_Mono || dst->format == QImage::Format_MonoLSB); |
| const int shift = 8 - (dst->width % 8); |
| const uchar *bitflip = qt_get_bitflip_array(); |
| for (int y = 0; y < h; ++y) { |
| uchar *begin = dst->data + y * dst->bytes_per_line; |
| uchar *end = begin + dst->bytes_per_line; |
| for (uchar *p = begin; p < end; ++p) { |
| *p = bitflip[*p]; |
| // When the data is non-byte aligned, an extra bit shift (of the number of |
| // unused bits at the end) is needed for the entire scanline. |
| if (shift != 8 && p != begin) { |
| if (dst->format == QImage::Format_Mono) { |
| for (int i = 0; i < shift; ++i) { |
| p[-1] <<= 1; |
| p[-1] |= (*p & (128 >> i)) >> (7 - i); |
| } |
| } else { |
| for (int i = 0; i < shift; ++i) { |
| p[-1] >>= 1; |
| p[-1] |= (*p & (1 << i)) << (7 - i); |
| } |
| } |
| } |
| } |
| if (shift != 8) { |
| if (dst->format == QImage::Format_Mono) |
| end[-1] <<= shift; |
| else |
| end[-1] >>= shift; |
| } |
| } |
| } |
| } |
| |
| /*! |
| \internal |
| */ |
| QImage QImage::mirrored_helper(bool horizontal, bool vertical) const |
| { |
| if (!d) |
| return QImage(); |
| |
| if ((d->width <= 1 && d->height <= 1) || (!horizontal && !vertical)) |
| return *this; |
| |
| // Create result image, copy colormap |
| QImage result(d->width, d->height, d->format); |
| QIMAGE_SANITYCHECK_MEMORY(result); |
| |
| // check if we ran out of of memory.. |
| if (!result.d) |
| return QImage(); |
| |
| result.d->colortable = d->colortable; |
| result.d->has_alpha_clut = d->has_alpha_clut; |
| copyMetadata(result.d, d); |
| |
| do_mirror(result.d, d, horizontal, vertical); |
| |
| return result; |
| } |
| |
| /*! |
| \internal |
| */ |
| void QImage::mirrored_inplace(bool horizontal, bool vertical) |
| { |
| if (!d || (d->width <= 1 && d->height <= 1) || (!horizontal && !vertical)) |
| return; |
| |
| detach(); |
| if (!d) |
| return; |
| if (!d->own_data) |
| *this = copy(); |
| |
| do_mirror(d, d, horizontal, vertical); |
| } |
| |
| /*! |
| \fn QImage QImage::rgbSwapped() const & |
| \fn QImage QImage::rgbSwapped() && |
| |
| Returns a QImage in which the values of the red and blue |
| components of all pixels have been swapped, effectively converting |
| an RGB image to an BGR image. |
| |
| The original QImage is not changed. |
| |
| \sa {QImage#Image Transformations}{Image Transformations} |
| */ |
| |
| static inline void rgbSwapped_generic(int width, int height, const QImage *src, QImage *dst, const QPixelLayout* layout) |
| { |
| const RbSwapFunc func = layout->rbSwap; |
| if (!func) { |
| qWarning("Trying to rb-swap an image format where it doesn't make sense"); |
| if (src != dst) |
| *dst = *src; |
| return; |
| } |
| |
| for (int i = 0; i < height; ++i) { |
| uchar *q = dst->scanLine(i); |
| const uchar *p = src->constScanLine(i); |
| func(q, p, width); |
| } |
| } |
| |
| /*! |
| \internal |
| */ |
| QImage QImage::rgbSwapped_helper() const |
| { |
| if (isNull()) |
| return *this; |
| |
| QImage res; |
| |
| switch (d->format) { |
| case Format_Invalid: |
| case NImageFormats: |
| Q_ASSERT(false); |
| break; |
| case Format_Alpha8: |
| case Format_Grayscale8: |
| case Format_Grayscale16: |
| return *this; |
| case Format_Mono: |
| case Format_MonoLSB: |
| case Format_Indexed8: |
| res = copy(); |
| for (int i = 0; i < res.d->colortable.size(); i++) { |
| QRgb c = res.d->colortable.at(i); |
| res.d->colortable[i] = QRgb(((c << 16) & 0xff0000) | ((c >> 16) & 0xff) | (c & 0xff00ff00)); |
| } |
| break; |
| case Format_RGBX8888: |
| case Format_RGBA8888: |
| case Format_RGBA8888_Premultiplied: |
| #if Q_BYTE_ORDER == Q_BIG_ENDIAN |
| res = QImage(d->width, d->height, d->format); |
| QIMAGE_SANITYCHECK_MEMORY(res); |
| for (int i = 0; i < d->height; i++) { |
| uint *q = (uint*)res.scanLine(i); |
| const uint *p = (const uint*)constScanLine(i); |
| const uint *end = p + d->width; |
| while (p < end) { |
| uint c = *p; |
| *q = ((c << 16) & 0xff000000) | ((c >> 16) & 0xff00) | (c & 0x00ff00ff); |
| p++; |
| q++; |
| } |
| } |
| break; |
| #else |
| // On little-endian rgba8888 is abgr32 and can use same rgb-swap as argb32 |
| Q_FALLTHROUGH(); |
| #endif |
| case Format_RGB32: |
| case Format_ARGB32: |
| case Format_ARGB32_Premultiplied: |
| res = QImage(d->width, d->height, d->format); |
| QIMAGE_SANITYCHECK_MEMORY(res); |
| for (int i = 0; i < d->height; i++) { |
| uint *q = (uint*)res.scanLine(i); |
| const uint *p = (const uint*)constScanLine(i); |
| const uint *end = p + d->width; |
| while (p < end) { |
| uint c = *p; |
| *q = ((c << 16) & 0xff0000) | ((c >> 16) & 0xff) | (c & 0xff00ff00); |
| p++; |
| q++; |
| } |
| } |
| break; |
| case Format_RGB16: |
| res = QImage(d->width, d->height, d->format); |
| QIMAGE_SANITYCHECK_MEMORY(res); |
| for (int i = 0; i < d->height; i++) { |
| ushort *q = (ushort*)res.scanLine(i); |
| const ushort *p = (const ushort*)constScanLine(i); |
| const ushort *end = p + d->width; |
| while (p < end) { |
| ushort c = *p; |
| *q = ((c << 11) & 0xf800) | ((c >> 11) & 0x1f) | (c & 0x07e0); |
| p++; |
| q++; |
| } |
| } |
| break; |
| case Format_RGBX64: |
| case Format_RGBA64: |
| case Format_RGBA64_Premultiplied: |
| res = QImage(d->width, d->height, d->format); |
| QIMAGE_SANITYCHECK_MEMORY(res); |
| for (int i = 0; i < d->height; i++) { |
| QRgba64 *q = reinterpret_cast<QRgba64 *>(res.scanLine(i)); |
| const QRgba64 *p = reinterpret_cast<const QRgba64 *>(constScanLine(i)); |
| const QRgba64 *end = p + d->width; |
| while (p < end) { |
| QRgba64 c = *p; |
| *q = QRgba64::fromRgba64(c.blue(), c.green(), c.red(), c.alpha()); |
| p++; |
| q++; |
| } |
| } |
| break; |
| default: |
| res = QImage(d->width, d->height, d->format); |
| rgbSwapped_generic(d->width, d->height, this, &res, &qPixelLayouts[d->format]); |
| break; |
| } |
| copyMetadata(res.d, d); |
| return res; |
| } |
| |
| /*! |
| \internal |
| */ |
| void QImage::rgbSwapped_inplace() |
| { |
| if (isNull()) |
| return; |
| |
| detach(); |
| if (!d) |
| return; |
| if (!d->own_data) |
| *this = copy(); |
| |
| switch (d->format) { |
| case Format_Invalid: |
| case NImageFormats: |
| Q_ASSERT(false); |
| break; |
| case Format_Alpha8: |
| case Format_Grayscale8: |
| case Format_Grayscale16: |
| return; |
| case Format_Mono: |
| case Format_MonoLSB: |
| case Format_Indexed8: |
| for (int i = 0; i < d->colortable.size(); i++) { |
| QRgb c = d->colortable.at(i); |
| d->colortable[i] = QRgb(((c << 16) & 0xff0000) | ((c >> 16) & 0xff) | (c & 0xff00ff00)); |
| } |
| break; |
| case Format_RGBX8888: |
| case Format_RGBA8888: |
| case Format_RGBA8888_Premultiplied: |
| #if Q_BYTE_ORDER == Q_BIG_ENDIAN |
| for (int i = 0; i < d->height; i++) { |
| uint *p = (uint*)scanLine(i); |
| uint *end = p + d->width; |
| while (p < end) { |
| uint c = *p; |
| *p = ((c << 16) & 0xff000000) | ((c >> 16) & 0xff00) | (c & 0x00ff00ff); |
| p++; |
| } |
| } |
| break; |
| #else |
| // On little-endian rgba8888 is abgr32 and can use same rgb-swap as argb32 |
| Q_FALLTHROUGH(); |
| #endif |
| case Format_RGB32: |
| case Format_ARGB32: |
| case Format_ARGB32_Premultiplied: |
| for (int i = 0; i < d->height; i++) { |
| uint *p = (uint*)scanLine(i); |
| uint *end = p + d->width; |
| while (p < end) { |
| uint c = *p; |
| *p = ((c << 16) & 0xff0000) | ((c >> 16) & 0xff) | (c & 0xff00ff00); |
| p++; |
| } |
| } |
| break; |
| case Format_RGB16: |
| for (int i = 0; i < d->height; i++) { |
| ushort *p = (ushort*)scanLine(i); |
| ushort *end = p + d->width; |
| while (p < end) { |
| ushort c = *p; |
| *p = ((c << 11) & 0xf800) | ((c >> 11) & 0x1f) | (c & 0x07e0); |
| p++; |
| } |
| } |
| break; |
| case Format_BGR30: |
| case Format_A2BGR30_Premultiplied: |
| case Format_RGB30: |
| case Format_A2RGB30_Premultiplied: |
| for (int i = 0; i < d->height; i++) { |
| uint *p = (uint*)scanLine(i); |
| uint *end = p + d->width; |
| while (p < end) { |
| *p = qRgbSwapRgb30(*p); |
| p++; |
| } |
| } |
| break; |
| case Format_RGBX64: |
| case Format_RGBA64: |
| case Format_RGBA64_Premultiplied: |
| for (int i = 0; i < d->height; i++) { |
| QRgba64 *p = reinterpret_cast<QRgba64 *>(scanLine(i)); |
| QRgba64 *end = p + d->width; |
| while (p < end) { |
| QRgba64 c = *p; |
| *p = QRgba64::fromRgba64(c.blue(), c.green(), c.red(), c.alpha()); |
| p++; |
| } |
| } |
| break; |
| default: |
| rgbSwapped_generic(d->width, d->height, this, this, &qPixelLayouts[d->format]); |
| break; |
| } |
| } |
| |
| /*! |
| Loads an image from the file with the given \a fileName. Returns \c true if |
| the image was successfully loaded; otherwise invalidates the image |
| and returns \c false. |
| |
| The loader attempts to read the image using the specified \a format, e.g., |
| PNG or JPG. If \a format is not specified (which is the default), it is |
| auto-detected based on the file's suffix and header. For details, see |
| QImageReader::setAutoDetectImageFormat(). |
| |
| The file name can either refer to an actual file on disk or to one |
| of the application's embedded resources. See the |
| \l{resources.html}{Resource System} overview for details on how to |
| embed images and other resource files in the application's |
| executable. |
| |
| \sa {QImage#Reading and Writing Image Files}{Reading and Writing Image Files} |
| */ |
| |
| bool QImage::load(const QString &fileName, const char* format) |
| { |
| *this = QImageReader(fileName, format).read(); |
| return !isNull(); |
| } |
| |
| /*! |
| \overload |
| |
| This function reads a QImage from the given \a device. This can, |
| for example, be used to load an image directly into a QByteArray. |
| */ |
| |
| bool QImage::load(QIODevice* device, const char* format) |
| { |
| *this = QImageReader(device, format).read(); |
| return !isNull(); |
| } |
| |
| /*! |
| \fn bool QImage::loadFromData(const uchar *data, int len, const char *format) |
| |
| Loads an image from the first \a len bytes of the given binary \a |
| data. Returns \c true if the image was successfully loaded; otherwise |
| invalidates the image and returns \c false. |
| |
| The loader attempts to read the image using the specified \a format, e.g., |
| PNG or JPG. If \a format is not specified (which is the default), the |
| loader probes the file for a header to guess the file format. |
| |
| \sa {QImage#Reading and Writing Image Files}{Reading and Writing Image Files} |
| */ |
| |
| bool QImage::loadFromData(const uchar *data, int len, const char *format) |
| { |
| *this = fromData(data, len, format); |
| return !isNull(); |
| } |
| |
| /*! |
| \fn bool QImage::loadFromData(const QByteArray &data, const char *format) |
| |
| \overload |
| |
| Loads an image from the given QByteArray \a data. |
| */ |
| |
| /*! |
| \fn QImage QImage::fromData(const uchar *data, int size, const char *format) |
| |
| Constructs a QImage from the first \a size bytes of the given |
| binary \a data. The loader attempts to read the image using the |
| specified \a format. If \a format is not specified (which is the default), |
| the loader probes the data for a header to guess the file format. |
| |
| If \a format is specified, it must be one of the values returned by |
| QImageReader::supportedImageFormats(). |
| |
| If the loading of the image fails, the image returned will be a null image. |
| |
| \sa load(), save(), {QImage#Reading and Writing Image Files}{Reading and Writing Image Files} |
| */ |
| |
| QImage QImage::fromData(const uchar *data, int size, const char *format) |
| { |
| QByteArray a = QByteArray::fromRawData(reinterpret_cast<const char *>(data), size); |
| QBuffer b; |
| b.setData(a); |
| b.open(QIODevice::ReadOnly); |
| return QImageReader(&b, format).read(); |
| } |
| |
| /*! |
| \fn QImage QImage::fromData(const QByteArray &data, const char *format) |
| |
| \overload |
| |
| Loads an image from the given QByteArray \a data. |
| */ |
| |
| /*! |
| Saves the image to the file with the given \a fileName, using the |
| given image file \a format and \a quality factor. If \a format is |
| 0, QImage will attempt to guess the format by looking at \a fileName's |
| suffix. |
| |
| The \a quality factor must be in the range 0 to 100 or -1. Specify |
| 0 to obtain small compressed files, 100 for large uncompressed |
| files, and -1 (the default) to use the default settings. |
| |
| Returns \c true if the image was successfully saved; otherwise |
| returns \c false. |
| |
| \sa {QImage#Reading and Writing Image Files}{Reading and Writing |
| Image Files} |
| */ |
| bool QImage::save(const QString &fileName, const char *format, int quality) const |
| { |
| if (isNull()) |
| return false; |
| QImageWriter writer(fileName, format); |
| return d->doImageIO(this, &writer, quality); |
| } |
| |
| /*! |
| \overload |
| |
| This function writes a QImage to the given \a device. |
| |
| This can, for example, be used to save an image directly into a |
| QByteArray: |
| |
| \snippet image/image.cpp 0 |
| */ |
| |
| bool QImage::save(QIODevice* device, const char* format, int quality) const |
| { |
| if (isNull()) |
| return false; // nothing to save |
| QImageWriter writer(device, format); |
| return d->doImageIO(this, &writer, quality); |
| } |
| |
| /* \internal |
| */ |
| |
| bool QImageData::doImageIO(const QImage *image, QImageWriter *writer, int quality) const |
| { |
| if (quality > 100 || quality < -1) |
| qWarning("QPixmap::save: Quality out of range [-1, 100]"); |
| if (quality >= 0) |
| writer->setQuality(qMin(quality,100)); |
| return writer->write(*image); |
| } |
| |
| /***************************************************************************** |
| QImage stream functions |
| *****************************************************************************/ |
| #if !defined(QT_NO_DATASTREAM) |
| /*! |
| \fn QDataStream &operator<<(QDataStream &stream, const QImage &image) |
| \relates QImage |
| |
| Writes the given \a image to the given \a stream as a PNG image, |
| or as a BMP image if the stream's version is 1. Note that writing |
| the stream to a file will not produce a valid image file. |
| |
| \sa QImage::save(), {Serializing Qt Data Types} |
| */ |
| |
| QDataStream &operator<<(QDataStream &s, const QImage &image) |
| { |
| if (s.version() >= 5) { |
| if (image.isNull()) { |
| s << (qint32) 0; // null image marker |
| return s; |
| } else { |
| s << (qint32) 1; |
| // continue ... |
| } |
| } |
| QImageWriter writer(s.device(), s.version() == 1 ? "bmp" : "png"); |
| writer.write(image); |
| return s; |
| } |
| |
| /*! |
| \fn QDataStream &operator>>(QDataStream &stream, QImage &image) |
| \relates QImage |
| |
| Reads an image from the given \a stream and stores it in the given |
| \a image. |
| |
| \sa QImage::load(), {Serializing Qt Data Types} |
| */ |
| |
| QDataStream &operator>>(QDataStream &s, QImage &image) |
| { |
| if (s.version() >= 5) { |
| qint32 nullMarker; |
| s >> nullMarker; |
| if (!nullMarker) { |
| image = QImage(); // null image |
| return s; |
| } |
| } |
| image = QImageReader(s.device(), s.version() == 1 ? "bmp" : "png").read(); |
| if (image.isNull() && s.version() >= 5) |
| s.setStatus(QDataStream::ReadPastEnd); |
| return s; |
| } |
| #endif // QT_NO_DATASTREAM |
| |
| |
| |
| /*! |
| \fn bool QImage::operator==(const QImage & image) const |
| |
| Returns \c true if this image and the given \a image have the same |
| contents; otherwise returns \c false. |
| |
| The comparison can be slow, unless there is some obvious |
| difference (e.g. different size or format), in which case the |
| function will return quickly. |
| |
| \sa operator=() |
| */ |
| |
| bool QImage::operator==(const QImage & i) const |
| { |
| // same object, or shared? |
| if (i.d == d) |
| return true; |
| if (!i.d || !d) |
| return false; |
| |
| // obviously different stuff? |
| if (i.d->height != d->height || i.d->width != d->width || i.d->format != d->format) |
| return false; |
| |
| if (d->format != Format_RGB32) { |
| if (d->format >= Format_ARGB32) { // all bits defined |
| const int n = d->width * d->depth / 8; |
| if (n == d->bytes_per_line && n == i.d->bytes_per_line) { |
| if (memcmp(bits(), i.bits(), d->nbytes)) |
| return false; |
| } else { |
| for (int y = 0; y < d->height; ++y) { |
| if (memcmp(scanLine(y), i.scanLine(y), n)) |
| return false; |
| } |
| } |
| } else { |
| const int w = width(); |
| const int h = height(); |
| const QVector<QRgb> &colortable = d->colortable; |
| const QVector<QRgb> &icolortable = i.d->colortable; |
| for (int y=0; y<h; ++y) { |
| for (int x=0; x<w; ++x) { |
| if (colortable[pixelIndex(x, y)] != icolortable[i.pixelIndex(x, y)]) |
| return false; |
| } |
| } |
| } |
| } else { |
| //alpha channel undefined, so we must mask it out |
| for(int l = 0; l < d->height; l++) { |
| int w = d->width; |
| const uint *p1 = reinterpret_cast<const uint*>(scanLine(l)); |
| const uint *p2 = reinterpret_cast<const uint*>(i.scanLine(l)); |
| while (w--) { |
| if ((*p1++ & 0x00ffffff) != (*p2++ & 0x00ffffff)) |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| |
| /*! |
| \fn bool QImage::operator!=(const QImage & image) const |
| |
| Returns \c true if this image and the given \a image have different |
| contents; otherwise returns \c false. |
| |
| The comparison can be slow, unless there is some obvious |
| difference, such as different widths, in which case the function |
| will return quickly. |
| |
| \sa operator=() |
| */ |
| |
| bool QImage::operator!=(const QImage & i) const |
| { |
| return !(*this == i); |
| } |
| |
| |
| |
| |
| /*! |
| Returns the number of pixels that fit horizontally in a physical |
| meter. Together with dotsPerMeterY(), this number defines the |
| intended scale and aspect ratio of the image. |
| |
| \sa setDotsPerMeterX(), {QImage#Image Information}{Image |
| Information} |
| */ |
| int QImage::dotsPerMeterX() const |
| { |
| return d ? qRound(d->dpmx) : 0; |
| } |
| |
| /*! |
| Returns the number of pixels that fit vertically in a physical |
| meter. Together with dotsPerMeterX(), this number defines the |
| intended scale and aspect ratio of the image. |
| |
| \sa setDotsPerMeterY(), {QImage#Image Information}{Image |
| Information} |
| */ |
| int QImage::dotsPerMeterY() const |
| { |
| return d ? qRound(d->dpmy) : 0; |
| } |
| |
| /*! |
| Sets the number of pixels that fit horizontally in a physical |
| meter, to \a x. |
| |
| Together with dotsPerMeterY(), this number defines the intended |
| scale and aspect ratio of the image, and determines the scale |
| at which QPainter will draw graphics on the image. It does not |
| change the scale or aspect ratio of the image when it is rendered |
| on other paint devices. |
| |
| \sa dotsPerMeterX(), {QImage#Image Information}{Image Information} |
| */ |
| void QImage::setDotsPerMeterX(int x) |
| { |
| if (!d || !x) |
| return; |
| detach(); |
| |
| if (d) |
| d->dpmx = x; |
| } |
| |
| /*! |
| Sets the number of pixels that fit vertically in a physical meter, |
| to \a y. |
| |
| Together with dotsPerMeterX(), this number defines the intended |
| scale and aspect ratio of the image, and determines the scale |
| at which QPainter will draw graphics on the image. It does not |
| change the scale or aspect ratio of the image when it is rendered |
| on other paint devices. |
| |
| \sa dotsPerMeterY(), {QImage#Image Information}{Image Information} |
| */ |
| void QImage::setDotsPerMeterY(int y) |
| { |
| if (!d || !y) |
| return; |
| detach(); |
| |
| if (d) |
| d->dpmy = y; |
| } |
| |
| /*! |
| \fn QPoint QImage::offset() const |
| |
| Returns the number of pixels by which the image is intended to be |
| offset by when positioning relative to other images. |
| |
| \sa setOffset(), {QImage#Image Information}{Image Information} |
| */ |
| QPoint QImage::offset() const |
| { |
| return d ? d->offset : QPoint(); |
| } |
| |
| |
| /*! |
| \fn void QImage::setOffset(const QPoint& offset) |
| |
| Sets the number of pixels by which the image is intended to be |
| offset by when positioning relative to other images, to \a offset. |
| |
| \sa offset(), {QImage#Image Information}{Image Information} |
| */ |
| void QImage::setOffset(const QPoint& p) |
| { |
| if (!d) |
| return; |
| detach(); |
| |
| if (d) |
| d->offset = p; |
| } |
| |
| /*! |
| Returns the text keys for this image. |
| |
| You can use these keys with text() to list the image text for a |
| certain key. |
| |
| \sa text() |
| */ |
| QStringList QImage::textKeys() const |
| { |
| return d ? QStringList(d->text.keys()) : QStringList(); |
| } |
| |
| /*! |
| Returns the image text associated with the given \a key. If the |
| specified \a key is an empty string, the whole image text is |
| returned, with each key-text pair separated by a newline. |
| |
| \sa setText(), textKeys() |
| */ |
| QString QImage::text(const QString &key) const |
| { |
| if (!d) |
| return QString(); |
| |
| if (!key.isEmpty()) |
| return d->text.value(key); |
| |
| QString tmp; |
| for (auto it = d->text.begin(), end = d->text.end(); it != end; ++it) |
| tmp += it.key() + QLatin1String(": ") + it.value().simplified() + QLatin1String("\n\n"); |
| if (!tmp.isEmpty()) |
| tmp.chop(2); // remove final \n\n |
| return tmp; |
| } |
| |
| /*! |
| \fn void QImage::setText(const QString &key, const QString &text) |
| |
| Sets the image text to the given \a text and associate it with the |
| given \a key. |
| |
| If you just want to store a single text block (i.e., a "comment" |
| or just a description), you can either pass an empty key, or use a |
| generic key like "Description". |
| |
| The image text is embedded into the image data when you |
| call save() or QImageWriter::write(). |
| |
| Not all image formats support embedded text. You can find out |
| if a specific image or format supports embedding text |
| by using QImageWriter::supportsOption(). We give an example: |
| |
| \snippet image/supportedformat.cpp 0 |
| |
| You can use QImageWriter::supportedImageFormats() to find out |
| which image formats are available to you. |
| |
| \sa text(), textKeys() |
| */ |
| void QImage::setText(const QString &key, const QString &value) |
| { |
| if (!d) |
| return; |
| detach(); |
| |
| if (d) |
| d->text.insert(key, value); |
| } |
| |
| /*! |
| \fn QString QImage::text(const char* key, const char* language) const |
| \obsolete |
| |
| Returns the text recorded for the given \a key in the given \a |
| language, or in a default language if \a language is 0. |
| |
| Use text() instead. |
| |
| The language the text is recorded in is no longer relevant since |
| the text is always set using QString and UTF-8 representation. |
| */ |
| |
| /*! |
| \fn QString QImage::text(const QImageTextKeyLang& keywordAndLanguage) const |
| \overload |
| \obsolete |
| |
| Returns the text recorded for the given \a keywordAndLanguage. |
| |
| Use text() instead. |
| |
| The language the text is recorded in is no longer relevant since |
| the text is always set using QString and UTF-8 representation. |
| */ |
| |
| /*! |
| \fn void QImage::setText(const char* key, const char* language, const QString& text) |
| \obsolete |
| |
| Sets the image text to the given \a text and associate it with the |
| given \a key. The text is recorded in the specified \a language, |
| or in a default language if \a language is 0. |
| |
| Use setText() instead. |
| |
| The language the text is recorded in is no longer relevant since |
| the text is always set using QString and UTF-8 representation. |
| |
| \omit |
| Records string \a for the keyword \a key. The \a key should be |
| a portable keyword recognizable by other software - some suggested |
| values can be found in |
| \l{http://www.libpng.org/pub/png/spec/1.2/png-1.2-pdg.html#C.Anc-text} |
| {the PNG specification}. \a s can be any text. \a lang should |
| specify the language code (see |
| \l{http://www.rfc-editor.org/rfc/rfc1766.txt}{RFC 1766}) or 0. |
| \endomit |
| */ |
| |
| /* |
| Sets the image bits to the \a pixmap contents and returns a |
| reference to the image. |
| |
| If the image shares data with other images, it will first |
| dereference the shared data. |
| |
| Makes a call to QPixmap::convertToImage(). |
| */ |
| |
| /*! |
| \internal |
| |
| Used by QPainter to retrieve a paint engine for the image. |
| */ |
| |
| QPaintEngine *QImage::paintEngine() const |
| { |
| if (!d) |
| return 0; |
| |
| if (!d->paintEngine) { |
| QPaintDevice *paintDevice = const_cast<QImage *>(this); |
| QPlatformIntegration *platformIntegration = QGuiApplicationPrivate::platformIntegration(); |
| if (platformIntegration) |
| d->paintEngine = platformIntegration->createImagePaintEngine(paintDevice); |
| if (!d->paintEngine) |
| d->paintEngine = new QRasterPaintEngine(paintDevice); |
| } |
| |
| return d->paintEngine; |
| } |
| |
| |
| /*! |
| \internal |
| |
| Returns the size for the specified \a metric on the device. |
| */ |
| int QImage::metric(PaintDeviceMetric metric) const |
| { |
| if (!d) |
| return 0; |
| |
| switch (metric) { |
| case PdmWidth: |
| return d->width; |
| |
| case PdmHeight: |
| return d->height; |
| |
| case PdmWidthMM: |
| return qRound(d->width * 1000 / d->dpmx); |
| |
| case PdmHeightMM: |
| return qRound(d->height * 1000 / d->dpmy); |
| |
| case PdmNumColors: |
| return d->colortable.size(); |
| |
| case PdmDepth: |
| return d->depth; |
| |
| case PdmDpiX: |
| return qRound(d->dpmx * 0.0254); |
| break; |
| |
| case PdmDpiY: |
| return qRound(d->dpmy * 0.0254); |
| break; |
| |
| case PdmPhysicalDpiX: |
| return qRound(d->dpmx * 0.0254); |
| break; |
| |
| case PdmPhysicalDpiY: |
| return qRound(d->dpmy * 0.0254); |
| break; |
| |
| case PdmDevicePixelRatio: |
| return d->devicePixelRatio; |
| break; |
| |
| case PdmDevicePixelRatioScaled: |
| return d->devicePixelRatio * QPaintDevice::devicePixelRatioFScale(); |
| break; |
| |
| default: |
| qWarning("QImage::metric(): Unhandled metric type %d", metric); |
| break; |
| } |
| return 0; |
| } |
| |
| |
| |
| /***************************************************************************** |
| QPixmap (and QImage) helper functions |
| *****************************************************************************/ |
| /* |
| This internal function contains the common (i.e. platform independent) code |
| to do a transformation of pixel data. It is used by QPixmap::transform() and by |
| QImage::transform(). |
| |
| \a trueMat is the true transformation matrix (see QPixmap::trueMatrix()) and |
| \a xoffset is an offset to the matrix. |
| |
| \a msbfirst specifies for 1bpp images, if the MSB or LSB comes first and \a |
| depth specifies the colordepth of the data. |
| |
| \a dptr is a pointer to the destination data, \a dbpl specifies the bits per |
| line for the destination data, \a p_inc is the offset that we advance for |
| every scanline and \a dHeight is the height of the destination image. |
| |
| \a sprt is the pointer to the source data, \a sbpl specifies the bits per |
| line of the source data, \a sWidth and \a sHeight are the width and height of |
| the source data. |
| */ |
| |
| #undef IWX_MSB |
| #define IWX_MSB(b) if (trigx < maxws && trigy < maxhs) { \ |
| if (*(sptr+sbpl*(trigy>>12)+(trigx>>15)) & \ |
| (1 << (7-((trigx>>12)&7)))) \ |
| *dptr |= b; \ |
| } \ |
| trigx += m11; \ |
| trigy += m12; |
| // END OF MACRO |
| #undef IWX_LSB |
| #define IWX_LSB(b) if (trigx < maxws && trigy < maxhs) { \ |
| if (*(sptr+sbpl*(trigy>>12)+(trigx>>15)) & \ |
| (1 << ((trigx>>12)&7))) \ |
| *dptr |= b; \ |
| } \ |
| trigx += m11; \ |
| trigy += m12; |
| // END OF MACRO |
| #undef IWX_PIX |
| #define IWX_PIX(b) if (trigx < maxws && trigy < maxhs) { \ |
| if ((*(sptr+sbpl*(trigy>>12)+(trigx>>15)) & \ |
| (1 << (7-((trigx>>12)&7)))) == 0) \ |
| *dptr &= ~b; \ |
| } \ |
| trigx += m11; \ |
| trigy += m12; |
| // END OF MACRO |
| bool qt_xForm_helper(const QTransform &trueMat, int xoffset, int type, int depth, |
| uchar *dptr, int dbpl, int p_inc, int dHeight, |
| const uchar *sptr, int sbpl, int sWidth, int sHeight) |
| { |
| int m11 = int(trueMat.m11()*4096.0); |
| int m12 = int(trueMat.m12()*4096.0); |
| int m21 = int(trueMat.m21()*4096.0); |
| int m22 = int(trueMat.m22()*4096.0); |
| int dx = qRound(trueMat.dx()*4096.0); |
| int dy = qRound(trueMat.dy()*4096.0); |
| |
| int m21ydx = dx + (xoffset<<16) + (m11 + m21) / 2; |
| int m22ydy = dy + (m12 + m22) / 2; |
| uint trigx; |
| uint trigy; |
| uint maxws = sWidth<<12; |
| uint maxhs = sHeight<<12; |
| |
| for (int y=0; y<dHeight; y++) { // for each target scanline |
| trigx = m21ydx; |
| trigy = m22ydy; |
| uchar *maxp = dptr + dbpl; |
| if (depth != 1) { |
| switch (depth) { |
| case 8: // 8 bpp transform |
| while (dptr < maxp) { |
| if (trigx < maxws && trigy < maxhs) |
| *dptr = *(sptr+sbpl*(trigy>>12)+(trigx>>12)); |
| trigx += m11; |
| trigy += m12; |
| dptr++; |
| } |
| break; |
| |
| case 16: // 16 bpp transform |
| while (dptr < maxp) { |
| if (trigx < maxws && trigy < maxhs) |
| *((ushort*)dptr) = *((const ushort *)(sptr+sbpl*(trigy>>12) + |
| ((trigx>>12)<<1))); |
| trigx += m11; |
| trigy += m12; |
| dptr++; |
| dptr++; |
| } |
| break; |
| |
| case 24: // 24 bpp transform |
| while (dptr < maxp) { |
| if (trigx < maxws && trigy < maxhs) { |
| const uchar *p2 = sptr+sbpl*(trigy>>12) + ((trigx>>12)*3); |
| dptr[0] = p2[0]; |
| dptr[1] = p2[1]; |
| dptr[2] = p2[2]; |
| } |
| trigx += m11; |
| trigy += m12; |
| dptr += 3; |
| } |
| break; |
| |
| case 32: // 32 bpp transform |
| while (dptr < maxp) { |
| if (trigx < maxws && trigy < maxhs) |
| *((uint*)dptr) = *((const uint *)(sptr+sbpl*(trigy>>12) + |
| ((trigx>>12)<<2))); |
| trigx += m11; |
| trigy += m12; |
| dptr += 4; |
| } |
| break; |
| |
| default: { |
| return false; |
| } |
| } |
| } else { |
| switch (type) { |
| case QT_XFORM_TYPE_MSBFIRST: |
| while (dptr < maxp) { |
| IWX_MSB(128); |
| IWX_MSB(64); |
| IWX_MSB(32); |
| IWX_MSB(16); |
| IWX_MSB(8); |
| IWX_MSB(4); |
| IWX_MSB(2); |
| IWX_MSB(1); |
| dptr++; |
| } |
| break; |
| case QT_XFORM_TYPE_LSBFIRST: |
| while (dptr < maxp) { |
| IWX_LSB(1); |
| IWX_LSB(2); |
| IWX_LSB(4); |
| IWX_LSB(8); |
| IWX_LSB(16); |
| IWX_LSB(32); |
| IWX_LSB(64); |
| IWX_LSB(128); |
| dptr++; |
| } |
| break; |
| } |
| } |
| m21ydx += m21; |
| m22ydy += m22; |
| dptr += p_inc; |
| } |
| return true; |
| } |
| #undef IWX_MSB |
| #undef IWX_LSB |
| #undef IWX_PIX |
| |
| /*! \fn int QImage::serialNumber() const |
| \obsolete |
| Returns a number that identifies the contents of this |
| QImage object. Distinct QImage objects can only have the same |
| serial number if they refer to the same contents (but they don't |
| have to). |
| |
| Use cacheKey() instead. |
| |
| \warning The serial number doesn't necessarily change when the |
| image is altered. This means that it may be dangerous to use |
| it as a cache key. |
| |
| \sa operator==() |
| */ |
| |
| /*! |
| Returns a number that identifies the contents of this QImage |
| object. Distinct QImage objects can only have the same key if they |
| refer to the same contents. |
| |
| The key will change when the image is altered. |
| */ |
| qint64 QImage::cacheKey() const |
| { |
| if (!d) |
| return 0; |
| else |
| return (((qint64) d->ser_no) << 32) | ((qint64) d->detach_no); |
| } |
| |
| /*! |
| \internal |
| |
| Returns \c true if the image is detached; otherwise returns \c false. |
| |
| \sa detach(), {Implicit Data Sharing} |
| */ |
| |
| bool QImage::isDetached() const |
| { |
| return d && d->ref.loadRelaxed() == 1; |
| } |
| |
| |
| /*! |
| \obsolete |
| Sets the alpha channel of this image to the given \a alphaChannel. |
| |
| If \a alphaChannel is an 8 bit grayscale image, the intensity values are |
| written into this buffer directly. Otherwise, \a alphaChannel is converted |
| to 32 bit and the intensity of the RGB pixel values is used. |
| |
| Note that the image will be converted to the Format_ARGB32_Premultiplied |
| format if the function succeeds. |
| |
| Use one of the composition modes in QPainter::CompositionMode instead. |
| |
| \warning This function is expensive. |
| |
| \sa alphaChannel(), {QImage#Image Transformations}{Image |
| Transformations}, {QImage#Image Formats}{Image Formats} |
| */ |
| |
| void QImage::setAlphaChannel(const QImage &alphaChannel) |
| { |
| if (!d) |
| return; |
| |
| int w = d->width; |
| int h = d->height; |
| |
| if (w != alphaChannel.d->width || h != alphaChannel.d->height) { |
| qWarning("QImage::setAlphaChannel: " |
| "Alpha channel must have same dimensions as the target image"); |
| return; |
| } |
| |
| if (d->paintEngine && d->paintEngine->isActive()) { |
| qWarning("QImage::setAlphaChannel: " |
| "Unable to set alpha channel while image is being painted on"); |
| return; |
| } |
| |
| if (d->format == QImage::Format_ARGB32_Premultiplied) |
| detach(); |
| else |
| *this = convertToFormat(QImage::Format_ARGB32_Premultiplied); |
| |
| if (isNull()) |
| return; |
| |
| // Slight optimization since alphachannels are returned as 8-bit grays. |
| if (alphaChannel.format() == QImage::Format_Alpha8 ||( alphaChannel.d->depth == 8 && alphaChannel.isGrayscale())) { |
| const uchar *src_data = alphaChannel.d->data; |
| uchar *dest_data = d->data; |
| for (int y=0; y<h; ++y) { |
| const uchar *src = src_data; |
| QRgb *dest = (QRgb *)dest_data; |
| for (int x=0; x<w; ++x) { |
| int alpha = *src; |
| int destAlpha = qt_div_255(alpha * qAlpha(*dest)); |
| *dest = ((destAlpha << 24) |
| | (qt_div_255(qRed(*dest) * alpha) << 16) |
| | (qt_div_255(qGreen(*dest) * alpha) << 8) |
| | (qt_div_255(qBlue(*dest) * alpha))); |
| ++dest; |
| ++src; |
| } |
| src_data += alphaChannel.d->bytes_per_line; |
| dest_data += d->bytes_per_line; |
| } |
| |
| } else { |
| const QImage sourceImage = alphaChannel.convertToFormat(QImage::Format_RGB32); |
| if (sourceImage.isNull()) |
| return; |
| const uchar *src_data = sourceImage.d->data; |
| uchar *dest_data = d->data; |
| for (int y=0; y<h; ++y) { |
| const QRgb *src = (const QRgb *) src_data; |
| QRgb *dest = (QRgb *) dest_data; |
| for (int x=0; x<w; ++x) { |
| int alpha = qGray(*src); |
| int destAlpha = qt_div_255(alpha * qAlpha(*dest)); |
| *dest = ((destAlpha << 24) |
| | (qt_div_255(qRed(*dest) * alpha) << 16) |
| | (qt_div_255(qGreen(*dest) * alpha) << 8) |
| | (qt_div_255(qBlue(*dest) * alpha))); |
| ++dest; |
| ++src; |
| } |
| src_data += sourceImage.d->bytes_per_line; |
| dest_data += d->bytes_per_line; |
| } |
| } |
| } |
| |
| |
| /*! |
| \obsolete |
| |
| Returns the alpha channel of the image as a new grayscale QImage in which |
| each pixel's red, green, and blue values are given the alpha value of the |
| original image. The color depth of the returned image is 8-bit. |
| |
| You can see an example of use of this function in QPixmap's |
| \l{QPixmap::}{alphaChannel()}, which works in the same way as |
| this function on QPixmaps. |
| |
| Most usecases for this function can be replaced with QPainter and |
| using composition modes. |
| |
| Note this returns a color-indexed image if you want the alpha channel in |
| the alpha8 format instead use convertToFormat(Format_Alpha8) on the source |
| image. |
| |
| \warning This is an expensive function. |
| |
| \sa setAlphaChannel(), hasAlphaChannel(), convertToFormat(), |
| {QPixmap#Pixmap Information}{Pixmap}, |
| {QImage#Image Transformations}{Image Transformations} |
| */ |
| |
| QImage QImage::alphaChannel() const |
| { |
| if (!d) |
| return QImage(); |
| |
| int w = d->width; |
| int h = d->height; |
| |
| QImage image(w, h, Format_Indexed8); |
| image.setColorCount(256); |
| |
| // set up gray scale table. |
| for (int i=0; i<256; ++i) |
| image.setColor(i, qRgb(i, i, i)); |
| |
| if (!hasAlphaChannel()) { |
| image.fill(255); |
| return image; |
| } |
| |
| if (d->format == Format_Indexed8) { |
| const uchar *src_data = d->data; |
| uchar *dest_data = image.d->data; |
| for (int y=0; y<h; ++y) { |
| const uchar *src = src_data; |
| uchar *dest = dest_data; |
| for (int x=0; x<w; ++x) { |
| *dest = qAlpha(d->colortable.at(*src)); |
| ++dest; |
| ++src; |
| } |
| src_data += d->bytes_per_line; |
| dest_data += image.d->bytes_per_line; |
| } |
| } else if (d->format == Format_Alpha8) { |
| const uchar *src_data = d->data; |
| uchar *dest_data = image.d->data; |
| memcpy(dest_data, src_data, d->bytes_per_line * h); |
| } else { |
| QImage alpha32 = *this; |
| bool canSkipConversion = (d->format == Format_ARGB32 || d->format == Format_ARGB32_Premultiplied); |
| #if Q_BYTE_ORDER == Q_LITTLE_ENDIAN |
| canSkipConversion = canSkipConversion || (d->format == Format_RGBA8888 || d->format == Format_RGBA8888_Premultiplied); |
| #endif |
| if (!canSkipConversion) |
| alpha32 = convertToFormat(Format_ARGB32); |
| |
| const uchar *src_data = alpha32.d->data; |
| uchar *dest_data = image.d->data; |
| for (int y=0; y<h; ++y) { |
| const QRgb *src = (const QRgb *) src_data; |
| uchar *dest = dest_data; |
| for (int x=0; x<w; ++x) { |
| *dest = qAlpha(*src); |
| ++dest; |
| ++src; |
| } |
| src_data += alpha32.d->bytes_per_line; |
| dest_data += image.d->bytes_per_line; |
| } |
| } |
| |
| return image; |
| } |
| |
| /*! |
| Returns \c true if the image has a format that respects the alpha |
| channel, otherwise returns \c false. |
| |
| \sa {QImage#Image Information}{Image Information} |
| */ |
| bool QImage::hasAlphaChannel() const |
| { |
| if (!d) |
| return false; |
| const QPixelFormat format = pixelFormat(); |
| if (format.alphaUsage() == QPixelFormat::UsesAlpha) |
| return true; |
| if (format.colorModel() == QPixelFormat::Indexed) |
| return d->has_alpha_clut; |
| return false; |
| } |
| |
| /*! |
| \since 4.7 |
| Returns the number of bit planes in the image. |
| |
| The number of bit planes is the number of bits of color and |
| transparency information for each pixel. This is different from |
| (i.e. smaller than) the depth when the image format contains |
| unused bits. |
| |
| \sa depth(), format(), {QImage#Image Formats}{Image Formats} |
| */ |
| int QImage::bitPlaneCount() const |
| { |
| if (!d) |
| return 0; |
| int bpc = 0; |
| switch (d->format) { |
| case QImage::Format_Invalid: |
| break; |
| case QImage::Format_BGR30: |
| case QImage::Format_RGB30: |
| bpc = 30; |
| break; |
| case QImage::Format_RGB32: |
| case QImage::Format_RGBX8888: |
| bpc = 24; |
| break; |
| case QImage::Format_RGB666: |
| bpc = 18; |
| break; |
| case QImage::Format_RGB555: |
| bpc = 15; |
| break; |
| case QImage::Format_ARGB8555_Premultiplied: |
| bpc = 23; |
| break; |
| case QImage::Format_RGB444: |
| bpc = 12; |
| break; |
| case QImage::Format_RGBX64: |
| bpc = 48; |
| break; |
| default: |
| bpc = qt_depthForFormat(d->format); |
| break; |
| } |
| return bpc; |
| } |
| |
| /*! |
| Returns a smoothly scaled copy of the image. The returned image has a size |
| of width \a w by height \a h pixels. |
| */ |
| QImage QImage::smoothScaled(int w, int h) const { |
| QImage src = *this; |
| switch (src.format()) { |
| case QImage::Format_RGB32: |
| case QImage::Format_ARGB32_Premultiplied: |
| #if Q_BYTE_ORDER == Q_LITTLE_ENDIAN |
| case QImage::Format_RGBX8888: |
| #endif |
| case QImage::Format_RGBA8888_Premultiplied: |
| #if QT_CONFIG(raster_64bit) |
| case QImage::Format_RGBX64: |
| case QImage::Format_RGBA64_Premultiplied: |
| break; |
| case QImage::Format_RGBA64: |
| src = src.convertToFormat(QImage::Format_RGBA64_Premultiplied); |
| break; |
| #endif |
| default: |
| if (src.hasAlphaChannel()) |
| src = src.convertToFormat(QImage::Format_ARGB32_Premultiplied); |
| else |
| src = src.convertToFormat(QImage::Format_RGB32); |
| } |
| src = qSmoothScaleImage(src, w, h); |
| if (!src.isNull()) |
| copyMetadata(src.d, d); |
| return src; |
| } |
| |
| static QImage rotated90(const QImage &image) |
| { |
| QImage out(image.height(), image.width(), image.format()); |
| copyMetadata(&out, image); |
| if (image.colorCount() > 0) |
| out.setColorTable(image.colorTable()); |
| int w = image.width(); |
| int h = image.height(); |
| const MemRotateFunc memrotate = qMemRotateFunctions[qPixelLayouts[image.format()].bpp][2]; |
| if (memrotate) { |
| memrotate(image.constBits(), w, h, image.bytesPerLine(), out.bits(), out.bytesPerLine()); |
| } else { |
| for (int y=0; y<h; ++y) { |
| if (image.colorCount()) |
| for (int x=0; x<w; ++x) |
| out.setPixel(h-y-1, x, image.pixelIndex(x, y)); |
| else |
| for (int x=0; x<w; ++x) |
| out.setPixel(h-y-1, x, image.pixel(x, y)); |
| } |
| } |
| return out; |
| } |
| |
| static QImage rotated180(const QImage &image) |
| { |
| const MemRotateFunc memrotate = qMemRotateFunctions[qPixelLayouts[image.format()].bpp][1]; |
| if (!memrotate) |
| return image.mirrored(true, true); |
| |
| QImage out(image.width(), image.height(), image.format()); |
| copyMetadata(&out, image); |
| if (image.colorCount() > 0) |
| out.setColorTable(image.colorTable()); |
| int w = image.width(); |
| int h = image.height(); |
| memrotate(image.constBits(), w, h, image.bytesPerLine(), out.bits(), out.bytesPerLine()); |
| return out; |
| } |
| |
| static QImage rotated270(const QImage &image) |
| { |
| QImage out(image.height(), image.width(), image.format()); |
| copyMetadata(&out, image); |
| if (image.colorCount() > 0) |
| out.setColorTable(image.colorTable()); |
| int w = image.width(); |
| int h = image.height(); |
| const MemRotateFunc memrotate = qMemRotateFunctions[qPixelLayouts[image.format()].bpp][0]; |
| if (memrotate) { |
| memrotate(image.constBits(), w, h, image.bytesPerLine(), out.bits(), out.bytesPerLine()); |
| } else { |
| for (int y=0; y<h; ++y) { |
| if (image.colorCount()) |
| for (int x=0; x<w; ++x) |
| out.setPixel(y, w-x-1, image.pixelIndex(x, y)); |
| else |
| for (int x=0; x<w; ++x) |
| out.setPixel(y, w-x-1, image.pixel(x, y)); |
| } |
| } |
| return out; |
| } |
| |
| /*! |
| Returns a copy of the image that is transformed using the given |
| transformation \a matrix and transformation \a mode. |
| |
| The returned image will normally have the same {Image Formats}{format} as |
| the original image. However, a complex transformation may result in an |
| image where not all pixels are covered by the transformed pixels of the |
| original image. In such cases, those background pixels will be assigned a |
| transparent color value, and the transformed image will be given a format |
| with an alpha channel, even if the orginal image did not have that. |
| |
| The transformation \a matrix is internally adjusted to compensate |
| for unwanted translation; i.e. the image produced is the smallest |
| image that contains all the transformed points of the original |
| image. Use the trueMatrix() function to retrieve the actual matrix |
| used for transforming an image. |
| |
| Unlike the other overload, this function can be used to perform perspective |
| transformations on images. |
| |
| \sa trueMatrix(), {QImage#Image Transformations}{Image |
| Transformations} |
| */ |
| |
| QImage QImage::transformed(const QTransform &matrix, Qt::TransformationMode mode ) const |
| { |
| if (!d) |
| return QImage(); |
| |
| // source image data |
| int ws = width(); |
| int hs = height(); |
| |
| // target image data |
| int wd; |
| int hd; |
| |
| // compute size of target image |
| QTransform mat = trueMatrix(matrix, ws, hs); |
| bool complex_xform = false; |
| bool scale_xform = false; |
| if (mat.type() <= QTransform::TxScale) { |
| if (mat.type() == QTransform::TxNone) // identity matrix |
| return *this; |
| else if (mat.m11() == -1. && mat.m22() == -1.) |
| return rotated180(*this); |
| |
| if (mode == Qt::FastTransformation) { |
| hd = qRound(qAbs(mat.m22()) * hs); |
| wd = qRound(qAbs(mat.m11()) * ws); |
| } else { |
| hd = int(qAbs(mat.m22()) * hs + 0.9999); |
| wd = int(qAbs(mat.m11()) * ws + 0.9999); |
| } |
| scale_xform = true; |
| } else { |
| if (mat.type() <= QTransform::TxRotate && mat.m11() == 0 && mat.m22() == 0) { |
| if (mat.m12() == 1. && mat.m21() == -1.) |
| return rotated90(*this); |
| else if (mat.m12() == -1. && mat.m21() == 1.) |
| return rotated270(*this); |
| } |
| |
| QPolygonF a(QRectF(0, 0, ws, hs)); |
| a = mat.map(a); |
| QRect r = a.boundingRect().toAlignedRect(); |
| wd = r.width(); |
| hd = r.height(); |
| complex_xform = true; |
| } |
| |
| if (wd == 0 || hd == 0) |
| return QImage(); |
| |
| // Make use of the optimized algorithm when we're scaling |
| if (scale_xform && mode == Qt::SmoothTransformation) { |
| if (mat.m11() < 0.0F && mat.m22() < 0.0F) { // horizontal/vertical flip |
| return smoothScaled(wd, hd).mirrored(true, true); |
| } else if (mat.m11() < 0.0F) { // horizontal flip |
| return smoothScaled(wd, hd).mirrored(true, false); |
| } else if (mat.m22() < 0.0F) { // vertical flip |
| return smoothScaled(wd, hd).mirrored(false, true); |
| } else { // no flipping |
| return smoothScaled(wd, hd); |
| } |
| } |
| |
| int bpp = depth(); |
| |
| int sbpl = bytesPerLine(); |
| const uchar *sptr = bits(); |
| |
| QImage::Format target_format = d->format; |
| |
| if (complex_xform || mode == Qt::SmoothTransformation) { |
| if (d->format < QImage::Format_RGB32 || !hasAlphaChannel()) { |
| target_format = qt_alphaVersion(d->format); |
| } |
| } |
| |
| QImage dImage(wd, hd, target_format); |
| QIMAGE_SANITYCHECK_MEMORY(dImage); |
| |
| if (target_format == QImage::Format_MonoLSB |
| || target_format == QImage::Format_Mono |
| || target_format == QImage::Format_Indexed8) { |
| dImage.d->colortable = d->colortable; |
| dImage.d->has_alpha_clut = d->has_alpha_clut | complex_xform; |
| } |
| |
| // initizialize the data |
| if (target_format == QImage::Format_Indexed8) { |
| if (dImage.d->colortable.size() < 256) { |
| // colors are left in the color table, so pick that one as transparent |
| dImage.d->colortable.append(0x0); |
| memset(dImage.bits(), dImage.d->colortable.size() - 1, dImage.d->nbytes); |
| } else { |
| memset(dImage.bits(), 0, dImage.d->nbytes); |
| } |
| } else |
| memset(dImage.bits(), 0x00, dImage.d->nbytes); |
| |
| if (target_format >= QImage::Format_RGB32) { |
| // Prevent QPainter from applying devicePixelRatio corrections |
| const QImage sImage = (devicePixelRatio() != 1) ? QImage(constBits(), width(), height(), format()) : *this; |
| |
| Q_ASSERT(sImage.devicePixelRatio() == 1); |
| Q_ASSERT(sImage.devicePixelRatio() == dImage.devicePixelRatio()); |
| |
| QPainter p(&dImage); |
| if (mode == Qt::SmoothTransformation) { |
| p.setRenderHint(QPainter::Antialiasing); |
| p.setRenderHint(QPainter::SmoothPixmapTransform); |
| } |
| p.setTransform(mat); |
| p.drawImage(QPoint(0, 0), sImage); |
| } else { |
| bool invertible; |
| mat = mat.inverted(&invertible); // invert matrix |
| if (!invertible) // error, return null image |
| return QImage(); |
| |
| // create target image (some of the code is from QImage::copy()) |
| int type = format() == Format_Mono ? QT_XFORM_TYPE_MSBFIRST : QT_XFORM_TYPE_LSBFIRST; |
| int dbpl = dImage.bytesPerLine(); |
| qt_xForm_helper(mat, 0, type, bpp, dImage.bits(), dbpl, 0, hd, sptr, sbpl, ws, hs); |
| } |
| copyMetadata(dImage.d, d); |
| |
| return dImage; |
| } |
| |
| /*! |
| \fn QTransform QImage::trueMatrix(const QTransform &matrix, int width, int height) |
| |
| Returns the actual matrix used for transforming an image with the |
| given \a width, \a height and \a matrix. |
| |
| When transforming an image using the transformed() function, the |
| transformation matrix is internally adjusted to compensate for |
| unwanted translation, i.e. transformed() returns the smallest |
| image containing all transformed points of the original image. |
| This function returns the modified matrix, which maps points |
| correctly from the original image into the new image. |
| |
| Unlike the other overload, this function creates transformation |
| matrices that can be used to perform perspective |
| transformations on images. |
| |
| \sa transformed(), {QImage#Image Transformations}{Image |
| Transformations} |
| */ |
| |
| QTransform QImage::trueMatrix(const QTransform &matrix, int w, int h) |
| { |
| const QRectF rect(0, 0, w, h); |
| const QRect mapped = matrix.mapRect(rect).toAlignedRect(); |
| const QPoint delta = mapped.topLeft(); |
| return matrix * QTransform().translate(-delta.x(), -delta.y()); |
| } |
| |
| /*! |
| \since 5.14 |
| |
| Sets the image color space to \a colorSpace without performing any conversions on image data. |
| |
| \sa colorSpace() |
| */ |
| void QImage::setColorSpace(const QColorSpace &colorSpace) |
| { |
| if (!d) |
| return; |
| if (d->colorSpace == colorSpace) |
| return; |
| if (!isDetached()) // Detach only if shared, not for read-only data. |
| detach(); |
| d->colorSpace = colorSpace; |
| } |
| |
| /*! |
| \since 5.14 |
| |
| Converts the image to \a colorSpace. |
| |
| If the image has no valid color space, the method does nothing. |
| |
| \sa convertedToColorSpace(), setColorSpace() |
| */ |
| void QImage::convertToColorSpace(const QColorSpace &colorSpace) |
| { |
| if (!d) |
| return; |
| if (!d->colorSpace.isValid()) |
| return; |
| if (!colorSpace.isValid()) { |
| qWarning() << "QImage::convertToColorSpace: Output colorspace is not valid"; |
| return; |
| } |
| detach(); |
| applyColorTransform(d->colorSpace.transformationToColorSpace(colorSpace)); |
| d->colorSpace = colorSpace; |
| } |
| |
| /*! |
| \since 5.14 |
| |
| Returns the image converted to \a colorSpace. |
| |
| If the image has no valid color space, a null QImage is returned. |
| |
| \sa convertToColorSpace() |
| */ |
| QImage QImage::convertedToColorSpace(const QColorSpace &colorSpace) const |
| { |
| if (!d || !d->colorSpace.isValid() || !colorSpace.isValid()) |
| return QImage(); |
| QImage image = copy(); |
| image.convertToColorSpace(colorSpace); |
| return image; |
| } |
| |
| /*! |
| \since 5.14 |
| |
| Returns the color space of the image if a color space is defined. |
| */ |
| QColorSpace QImage::colorSpace() const |
| { |
| if (!d) |
| return QColorSpace(); |
| return d->colorSpace; |
| } |
| |
| /*! |
| \since 5.14 |
| |
| Applies the color transformation \a transform to all pixels in the image. |
| */ |
| void QImage::applyColorTransform(const QColorTransform &transform) |
| { |
| QImage::Format oldFormat = format(); |
| if (depth() > 32) { |
| if (format() != QImage::Format_RGBX64 && format() != QImage::Format_RGBA64 |
| && format() != QImage::Format_RGBA64_Premultiplied) |
| *this = std::move(*this).convertToFormat(QImage::Format_RGBA64); |
| } else if (format() != QImage::Format_ARGB32 && format() != QImage::Format_RGB32 |
| && format() != QImage::Format_ARGB32_Premultiplied) { |
| if (hasAlphaChannel()) |
| *this = std::move(*this).convertToFormat(QImage::Format_ARGB32); |
| else |
| *this = std::move(*this).convertToFormat(QImage::Format_RGB32); |
| } |
| |
| QColorTransformPrivate::TransformFlags flags = QColorTransformPrivate::Unpremultiplied; |
| switch (format()) { |
| case Format_ARGB32_Premultiplied: |
| case Format_RGBA64_Premultiplied: |
| flags = QColorTransformPrivate::Premultiplied; |
| break; |
| case Format_RGB32: |
| case Format_RGBX64: |
| flags = QColorTransformPrivate::InputOpaque; |
| break; |
| case Format_ARGB32: |
| case Format_RGBA64: |
| break; |
| default: |
| Q_UNREACHABLE(); |
| } |
| |
| if (depth() > 32) { |
| for (int i = 0; i < height(); ++i) { |
| QRgba64 *scanline = reinterpret_cast<QRgba64 *>(scanLine(i)); |
| transform.d->apply(scanline, scanline, width(), flags); |
| } |
| } else { |
| for (int i = 0; i < height(); ++i) { |
| QRgb *scanline = reinterpret_cast<QRgb *>(scanLine(i)); |
| transform.d->apply(scanline, scanline, width(), flags); |
| } |
| } |
| |
| if (oldFormat != format()) |
| *this = std::move(*this).convertToFormat(oldFormat); |
| } |
| |
| |
| bool QImageData::convertInPlace(QImage::Format newFormat, Qt::ImageConversionFlags flags) |
| { |
| if (format == newFormat) |
| return true; |
| |
| // No in-place conversion if we have to detach |
| if (ref.loadRelaxed() > 1 || !own_data) |
| return false; |
| |
| InPlace_Image_Converter converter = qimage_inplace_converter_map[format][newFormat]; |
| if (converter) |
| return converter(this, flags); |
| else if (format > QImage::Format_Indexed8 && newFormat > QImage::Format_Indexed8 && !qimage_converter_map[format][newFormat]) |
| // Convert inplace generic, but only if there are no direct converters, |
| // any direct ones are probably better even if not inplace. |
| return convert_generic_inplace(this, newFormat, flags); |
| else |
| return false; |
| } |
| |
| /*! |
| \typedef QImage::DataPtr |
| \internal |
| */ |
| |
| /*! |
| \fn DataPtr & QImage::data_ptr() |
| \internal |
| */ |
| |
| #ifndef QT_NO_DEBUG_STREAM |
| QDebug operator<<(QDebug dbg, const QImage &i) |
| { |
| QDebugStateSaver saver(dbg); |
| dbg.nospace(); |
| dbg.noquote(); |
| dbg << "QImage("; |
| if (i.isNull()) { |
| dbg << "null"; |
| } else { |
| dbg << i.size() << ",format=" << i.format() << ",depth=" << i.depth(); |
| if (i.colorCount()) |
| dbg << ",colorCount=" << i.colorCount(); |
| const int bytesPerLine = i.bytesPerLine(); |
| dbg << ",devicePixelRatio=" << i.devicePixelRatio() |
| << ",bytesPerLine=" << bytesPerLine << ",sizeInBytes=" << i.sizeInBytes(); |
| if (dbg.verbosity() > 2 && i.height() > 0) { |
| const int outputLength = qMin(bytesPerLine, 24); |
| dbg << ",line0=" |
| << QByteArray(reinterpret_cast<const char *>(i.scanLine(0)), outputLength).toHex() |
| << "..."; |
| } |
| } |
| dbg << ')'; |
| return dbg; |
| } |
| #endif |
| |
| /*! |
| \fn void QImage::setNumColors(int n) |
| \obsolete |
| |
| Resizes the color table to contain \a n entries. |
| |
| \sa setColorCount() |
| */ |
| |
| /*! |
| \fn int QImage::numBytes() const |
| \obsolete |
| |
| Returns the number of bytes occupied by the image data. |
| |
| \sa sizeInBytes() |
| */ |
| |
| /*! |
| \fn QStringList QImage::textLanguages() const |
| \obsolete |
| |
| Returns the language identifiers for which some texts are recorded. |
| Note that if you want to iterate over the list, you should iterate over a copy. |
| |
| The language the text is recorded in is no longer relevant since the text is |
| always set using QString and UTF-8 representation. |
| |
| \sa textKeys() |
| */ |
| |
| /*! |
| \fn QList<QImageTextKeyLang> QImage::textList() const |
| \obsolete |
| |
| Returns a list of QImageTextKeyLang objects that enumerate all the texts |
| key/language pairs set for this image. |
| |
| The language the text is recorded in is no longer relevant since the text |
| is always set using QString and UTF-8 representation. |
| |
| \sa textKeys() |
| */ |
| |
| static Q_CONSTEXPR QPixelFormat pixelformats[] = { |
| //QImage::Format_Invalid: |
| QPixelFormat(), |
| //QImage::Format_Mono: |
| QPixelFormat(QPixelFormat::Indexed, |
| /*RED*/ 1, |
| /*GREEN*/ 0, |
| /*BLUE*/ 0, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedByte, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_MonoLSB: |
| QPixelFormat(QPixelFormat::Indexed, |
| /*RED*/ 1, |
| /*GREEN*/ 0, |
| /*BLUE*/ 0, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedByte, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_Indexed8: |
| QPixelFormat(QPixelFormat::Indexed, |
| /*RED*/ 8, |
| /*GREEN*/ 0, |
| /*BLUE*/ 0, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedByte, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGB32: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 8, |
| /*GREEN*/ 8, |
| /*BLUE*/ 8, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 8, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_ARGB32: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 8, |
| /*GREEN*/ 8, |
| /*BLUE*/ 8, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 8, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_ARGB32_Premultiplied: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 8, |
| /*GREEN*/ 8, |
| /*BLUE*/ 8, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 8, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::Premultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGB16: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 5, |
| /*GREEN*/ 6, |
| /*BLUE*/ 5, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedShort, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_ARGB8565_Premultiplied: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 5, |
| /*GREEN*/ 6, |
| /*BLUE*/ 5, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 8, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::Premultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGB666: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 6, |
| /*GREEN*/ 6, |
| /*BLUE*/ 6, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_ARGB6666_Premultiplied: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 6, |
| /*GREEN*/ 6, |
| /*BLUE*/ 6, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 6, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtEnd, |
| /*PREMULTIPLIED*/ QPixelFormat::Premultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGB555: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 5, |
| /*GREEN*/ 5, |
| /*BLUE*/ 5, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedShort, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_ARGB8555_Premultiplied: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 5, |
| /*GREEN*/ 5, |
| /*BLUE*/ 5, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 8, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::Premultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGB888: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 8, |
| /*GREEN*/ 8, |
| /*BLUE*/ 8, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedByte, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGB444: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 4, |
| /*GREEN*/ 4, |
| /*BLUE*/ 4, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedShort, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_ARGB4444_Premultiplied: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 4, |
| /*GREEN*/ 4, |
| /*BLUE*/ 4, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 4, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtEnd, |
| /*PREMULTIPLIED*/ QPixelFormat::Premultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedShort, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGBX8888: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 8, |
| /*GREEN*/ 8, |
| /*BLUE*/ 8, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 8, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtEnd, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedByte, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGBA8888: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 8, |
| /*GREEN*/ 8, |
| /*BLUE*/ 8, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 8, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtEnd, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedByte, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGBA8888_Premultiplied: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 8, |
| /*GREEN*/ 8, |
| /*BLUE*/ 8, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 8, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtEnd, |
| /*PREMULTIPLIED*/ QPixelFormat::Premultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedByte, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_BGR30: |
| QPixelFormat(QPixelFormat::BGR, |
| /*RED*/ 10, |
| /*GREEN*/ 10, |
| /*BLUE*/ 10, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 2, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_A2BGR30_Premultiplied: |
| QPixelFormat(QPixelFormat::BGR, |
| /*RED*/ 10, |
| /*GREEN*/ 10, |
| /*BLUE*/ 10, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 2, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::Premultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGB30: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 10, |
| /*GREEN*/ 10, |
| /*BLUE*/ 10, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 2, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_A2RGB30_Premultiplied: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 10, |
| /*GREEN*/ 10, |
| /*BLUE*/ 10, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 2, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::Premultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedInteger, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_Alpha8: |
| QPixelFormat(QPixelFormat::Alpha, |
| /*First*/ 0, |
| /*SECOND*/ 0, |
| /*THIRD*/ 0, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 8, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::Premultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedByte, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_Grayscale8: |
| QPixelFormat(QPixelFormat::Grayscale, |
| /*GRAY*/ 8, |
| /*SECOND*/ 0, |
| /*THIRD*/ 0, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedByte, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGBX64: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 16, |
| /*GREEN*/ 16, |
| /*BLUE*/ 16, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 16, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtEnd, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedShort, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGBA64: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 16, |
| /*GREEN*/ 16, |
| /*BLUE*/ 16, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 16, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtEnd, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedShort, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_RGBA64_Premultiplied: |
| QPixelFormat(QPixelFormat::RGB, |
| /*RED*/ 16, |
| /*GREEN*/ 16, |
| /*BLUE*/ 16, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 16, |
| /*ALPHA USAGE*/ QPixelFormat::UsesAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtEnd, |
| /*PREMULTIPLIED*/ QPixelFormat::Premultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedShort, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_Grayscale16: |
| QPixelFormat(QPixelFormat::Grayscale, |
| /*GRAY*/ 16, |
| /*SECOND*/ 0, |
| /*THIRD*/ 0, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedShort, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| //QImage::Format_BGR888: |
| QPixelFormat(QPixelFormat::BGR, |
| /*RED*/ 8, |
| /*GREEN*/ 8, |
| /*BLUE*/ 8, |
| /*FOURTH*/ 0, |
| /*FIFTH*/ 0, |
| /*ALPHA*/ 0, |
| /*ALPHA USAGE*/ QPixelFormat::IgnoresAlpha, |
| /*ALPHA POSITION*/ QPixelFormat::AtBeginning, |
| /*PREMULTIPLIED*/ QPixelFormat::NotPremultiplied, |
| /*INTERPRETATION*/ QPixelFormat::UnsignedByte, |
| /*BYTE ORDER*/ QPixelFormat::CurrentSystemEndian), |
| }; |
| Q_STATIC_ASSERT(sizeof(pixelformats) / sizeof(*pixelformats) == QImage::NImageFormats); |
| |
| /*! |
| Returns the QImage::Format as a QPixelFormat |
| */ |
| QPixelFormat QImage::pixelFormat() const noexcept |
| { |
| return toPixelFormat(format()); |
| } |
| |
| /*! |
| Converts \a format into a QPixelFormat |
| */ |
| QPixelFormat QImage::toPixelFormat(QImage::Format format) noexcept |
| { |
| Q_ASSERT(static_cast<int>(format) < NImageFormats); |
| return pixelformats[format]; |
| } |
| |
| /*! |
| Converts \a format into a QImage::Format |
| */ |
| QImage::Format QImage::toImageFormat(QPixelFormat format) noexcept |
| { |
| for (int i = 0; i < NImageFormats; i++) { |
| if (format == pixelformats[i]) |
| return Format(i); |
| } |
| return Format_Invalid; |
| } |
| |
| Q_GUI_EXPORT void qt_imageTransform(QImage &src, QImageIOHandler::Transformations orient) |
| { |
| if (orient == QImageIOHandler::TransformationNone) |
| return; |
| if (orient == QImageIOHandler::TransformationRotate270) { |
| src = rotated270(src); |
| } else { |
| src = std::move(src).mirrored(orient & QImageIOHandler::TransformationMirror, |
| orient & QImageIOHandler::TransformationFlip); |
| if (orient & QImageIOHandler::TransformationRotate90) |
| src = rotated90(src); |
| } |
| } |
| |
| QMap<QString, QString> qt_getImageText(const QImage &image, const QString &description) |
| { |
| QMap<QString, QString> text = qt_getImageTextFromDescription(description); |
| const auto textKeys = image.textKeys(); |
| for (const QString &key : textKeys) { |
| if (!key.isEmpty() && !text.contains(key)) |
| text.insert(key, image.text(key)); |
| } |
| return text; |
| } |
| |
| QMap<QString, QString> qt_getImageTextFromDescription(const QString &description) |
| { |
| QMap<QString, QString> text; |
| const auto pairs = description.splitRef(QLatin1String("\n\n")); |
| for (const QStringRef &pair : pairs) { |
| int index = pair.indexOf(QLatin1Char(':')); |
| if (index >= 0 && pair.indexOf(QLatin1Char(' ')) < index) { |
| if (!pair.trimmed().isEmpty()) |
| text.insert(QLatin1String("Description"), pair.toString().simplified()); |
| } else { |
| const QStringRef key = pair.left(index); |
| if (!key.trimmed().isEmpty()) |
| text.insert(key.toString(), pair.mid(index + 2).toString().simplified()); |
| } |
| } |
| return text; |
| } |
| |
| QT_END_NAMESPACE |