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| ****************************************************************************/ |
| |
| #ifndef QIMAGE_P_H |
| #define QIMAGE_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtGui/qcolorspace.h> |
| #include <QtGui/private/qtguiglobal_p.h> |
| #include <QtGui/qimage.h> |
| #include <QtCore/private/qnumeric_p.h> |
| |
| #include <QMap> |
| #include <QVector> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QImageWriter; |
| |
| struct Q_GUI_EXPORT QImageData { // internal image data |
| QImageData(); |
| ~QImageData(); |
| static QImageData *create(const QSize &size, QImage::Format format); |
| static QImageData *create(uchar *data, int w, int h, int bpl, QImage::Format format, bool readOnly, QImageCleanupFunction cleanupFunction = nullptr, void *cleanupInfo = nullptr); |
| |
| QAtomicInt ref; |
| |
| int width; |
| int height; |
| int depth; |
| qsizetype nbytes; // number of bytes data |
| qreal devicePixelRatio; |
| QVector<QRgb> colortable; |
| uchar *data; |
| QImage::Format format; |
| qsizetype bytes_per_line; |
| int ser_no; // serial number |
| int detach_no; |
| |
| qreal dpmx; // dots per meter X (or 0) |
| qreal dpmy; // dots per meter Y (or 0) |
| QPoint offset; // offset in pixels |
| |
| uint own_data : 1; |
| uint ro_data : 1; |
| uint has_alpha_clut : 1; |
| uint is_cached : 1; |
| uint is_locked : 1; |
| |
| QImageCleanupFunction cleanupFunction; |
| void* cleanupInfo; |
| |
| bool checkForAlphaPixels() const; |
| |
| // Convert the image in-place, minimizing memory reallocation |
| // Return false if the conversion cannot be done in-place. |
| bool convertInPlace(QImage::Format newFormat, Qt::ImageConversionFlags); |
| |
| QMap<QString, QString> text; |
| |
| bool doImageIO(const QImage *image, QImageWriter* io, int quality) const; |
| |
| QPaintEngine *paintEngine; |
| |
| QColorSpace colorSpace; |
| |
| struct ImageSizeParameters { |
| qsizetype bytesPerLine; |
| qsizetype totalSize; |
| bool isValid() const { return bytesPerLine > 0 && totalSize > 0; } |
| }; |
| static ImageSizeParameters calculateImageParameters(qsizetype width, qsizetype height, qsizetype depth); |
| }; |
| |
| inline QImageData::ImageSizeParameters |
| QImageData::calculateImageParameters(qsizetype width, qsizetype height, qsizetype depth) |
| { |
| ImageSizeParameters invalid = { -1, -1 }; |
| if (height <= 0) |
| return invalid; |
| |
| // calculate the size, taking care of overflows |
| qsizetype bytes_per_line; |
| if (mul_overflow(width, depth, &bytes_per_line)) |
| return invalid; |
| if (add_overflow(bytes_per_line, qsizetype(31), &bytes_per_line)) |
| return invalid; |
| // bytes per scanline (must be multiple of 4) |
| bytes_per_line = (bytes_per_line >> 5) << 2; // can't overflow |
| |
| qsizetype total_size; |
| if (mul_overflow(height, bytes_per_line, &total_size)) |
| return invalid; |
| qsizetype dummy; |
| if (mul_overflow(height, qsizetype(sizeof(uchar *)), &dummy)) |
| return invalid; // why is this here? |
| #if QT_VERSION < QT_VERSION_CHECK(6,0,0) |
| // Disallow images where width * depth calculations might overflow |
| if (width > (INT_MAX - 31) / depth) |
| return invalid; |
| #endif |
| |
| return { bytes_per_line, total_size }; |
| } |
| |
| typedef void (*Image_Converter)(QImageData *dest, const QImageData *src, Qt::ImageConversionFlags); |
| typedef bool (*InPlace_Image_Converter)(QImageData *data, Qt::ImageConversionFlags); |
| |
| extern Image_Converter qimage_converter_map[QImage::NImageFormats][QImage::NImageFormats]; |
| extern InPlace_Image_Converter qimage_inplace_converter_map[QImage::NImageFormats][QImage::NImageFormats]; |
| |
| void convert_generic(QImageData *dest, const QImageData *src, Qt::ImageConversionFlags); |
| void convert_generic_to_rgb64(QImageData *dest, const QImageData *src, Qt::ImageConversionFlags); |
| bool convert_generic_inplace(QImageData *data, QImage::Format dst_format, Qt::ImageConversionFlags); |
| |
| void dither_to_Mono(QImageData *dst, const QImageData *src, Qt::ImageConversionFlags flags, bool fromalpha); |
| |
| const uchar *qt_get_bitflip_array(); |
| Q_GUI_EXPORT void qGamma_correct_back_to_linear_cs(QImage *image); |
| |
| #if defined(_M_ARM) // QTBUG-42038 |
| #pragma optimize("", off) |
| #endif |
| inline int qt_depthForFormat(QImage::Format format) |
| { |
| int depth = 0; |
| switch(format) { |
| case QImage::Format_Invalid: |
| case QImage::NImageFormats: |
| Q_UNREACHABLE(); |
| case QImage::Format_Mono: |
| case QImage::Format_MonoLSB: |
| depth = 1; |
| break; |
| case QImage::Format_Indexed8: |
| case QImage::Format_Alpha8: |
| case QImage::Format_Grayscale8: |
| depth = 8; |
| break; |
| case QImage::Format_RGB32: |
| case QImage::Format_ARGB32: |
| case QImage::Format_ARGB32_Premultiplied: |
| case QImage::Format_RGBX8888: |
| case QImage::Format_RGBA8888: |
| case QImage::Format_RGBA8888_Premultiplied: |
| case QImage::Format_BGR30: |
| case QImage::Format_A2BGR30_Premultiplied: |
| case QImage::Format_RGB30: |
| case QImage::Format_A2RGB30_Premultiplied: |
| depth = 32; |
| break; |
| case QImage::Format_RGB555: |
| case QImage::Format_RGB16: |
| case QImage::Format_RGB444: |
| case QImage::Format_ARGB4444_Premultiplied: |
| case QImage::Format_Grayscale16: |
| depth = 16; |
| break; |
| case QImage::Format_RGB666: |
| case QImage::Format_ARGB6666_Premultiplied: |
| case QImage::Format_ARGB8565_Premultiplied: |
| case QImage::Format_ARGB8555_Premultiplied: |
| case QImage::Format_RGB888: |
| case QImage::Format_BGR888: |
| depth = 24; |
| break; |
| case QImage::Format_RGBX64: |
| case QImage::Format_RGBA64: |
| case QImage::Format_RGBA64_Premultiplied: |
| depth = 64; |
| break; |
| } |
| return depth; |
| } |
| |
| #if defined(_M_ARM) |
| #pragma optimize("", on) |
| #endif |
| |
| inline QImage::Format qt_opaqueVersion(QImage::Format format) |
| { |
| switch (format) { |
| case QImage::Format_ARGB8565_Premultiplied: |
| return QImage::Format_RGB16; |
| case QImage::Format_ARGB8555_Premultiplied: |
| return QImage::Format_RGB555; |
| case QImage::Format_ARGB6666_Premultiplied: |
| return QImage::Format_RGB666; |
| case QImage::Format_ARGB4444_Premultiplied: |
| return QImage::Format_RGB444; |
| case QImage::Format_RGBA8888: |
| case QImage::Format_RGBA8888_Premultiplied: |
| return QImage::Format_RGBX8888; |
| case QImage::Format_A2BGR30_Premultiplied: |
| return QImage::Format_BGR30; |
| case QImage::Format_A2RGB30_Premultiplied: |
| return QImage::Format_RGB30; |
| case QImage::Format_RGBA64: |
| case QImage::Format_RGBA64_Premultiplied: |
| return QImage::Format_RGBX64; |
| case QImage::Format_ARGB32_Premultiplied: |
| case QImage::Format_ARGB32: |
| default: |
| return QImage::Format_RGB32; |
| } |
| } |
| |
| inline QImage::Format qt_alphaVersion(QImage::Format format) |
| { |
| switch (format) { |
| case QImage::Format_RGB16: |
| return QImage::Format_ARGB8565_Premultiplied; |
| case QImage::Format_RGB555: |
| return QImage::Format_ARGB8555_Premultiplied; |
| case QImage::Format_RGB666: |
| return QImage::Format_ARGB6666_Premultiplied; |
| case QImage::Format_RGB444: |
| return QImage::Format_ARGB4444_Premultiplied; |
| case QImage::Format_RGBX8888: |
| return QImage::Format_RGBA8888_Premultiplied; |
| case QImage::Format_BGR30: |
| return QImage::Format_A2BGR30_Premultiplied; |
| case QImage::Format_RGB30: |
| return QImage::Format_A2RGB30_Premultiplied; |
| case QImage::Format_RGBX64: |
| return QImage::Format_RGBA64_Premultiplied; |
| default: |
| break; |
| } |
| return QImage::Format_ARGB32_Premultiplied; |
| } |
| |
| inline bool qt_highColorPrecision(QImage::Format format, bool opaque = false) |
| { |
| // Formats with higher color precision than ARGB32_Premultiplied. |
| switch (format) { |
| case QImage::Format_ARGB32: |
| case QImage::Format_RGBA8888: |
| return !opaque; |
| case QImage::Format_BGR30: |
| case QImage::Format_RGB30: |
| case QImage::Format_A2BGR30_Premultiplied: |
| case QImage::Format_A2RGB30_Premultiplied: |
| case QImage::Format_RGBX64: |
| case QImage::Format_RGBA64: |
| case QImage::Format_RGBA64_Premultiplied: |
| case QImage::Format_Grayscale16: |
| return true; |
| default: |
| break; |
| } |
| return false; |
| } |
| |
| |
| inline QImage::Format qt_maybeAlphaVersionWithSameDepth(QImage::Format format) |
| { |
| const QImage::Format toFormat = qt_alphaVersion(format); |
| return qt_depthForFormat(format) == qt_depthForFormat(toFormat) ? toFormat : format; |
| } |
| |
| inline QImage::Format qt_opaqueVersionForPainting(QImage::Format format) |
| { |
| return qt_opaqueVersion(format); |
| } |
| |
| inline QImage::Format qt_alphaVersionForPainting(QImage::Format format) |
| { |
| QImage::Format toFormat = qt_alphaVersion(format); |
| #if defined(__ARM_NEON__) || defined(__SSE2__) |
| // If we are switching depth anyway and we have optimized ARGB32PM routines, upgrade to that. |
| if (qt_depthForFormat(format) != qt_depthForFormat(toFormat)) |
| toFormat = QImage::Format_ARGB32_Premultiplied; |
| #endif |
| return toFormat; |
| } |
| |
| Q_GUI_EXPORT QMap<QString, QString> qt_getImageText(const QImage &image, const QString &description); |
| Q_GUI_EXPORT QMap<QString, QString> qt_getImageTextFromDescription(const QString &description); |
| |
| QT_END_NAMESPACE |
| |
| #endif // QIMAGE_P_H |