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| |
| #include "qpaintedtextureimage.h" |
| #include "qpaintedtextureimage_p.h" |
| |
| #include <QtGui/qpainter.h> |
| #include <QtGui/qimage.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace Qt3DRender { |
| |
| /*! |
| \class Qt3DRender::QPaintedTextureImage |
| \inmodule Qt3DRender |
| \since 5.8 |
| \brief A QAbstractTextureImage that can be written through a QPainter. |
| |
| A QPaintedTextureImage provides a way to specify a texture image |
| (and thus an OpenGL texture) through a QPainter. The width and height of the |
| texture image can be specified through the width and height or size |
| properties. |
| |
| A QPaintedTextureImage must be subclassed and the virtual paint() function |
| implemented. Each time update() is called on the QPaintedTextureImage, |
| the paint() function is invoked and the resulting image is uploaded. |
| |
| The QPaintedTextureImage must be attached to some QAbstractTexture. |
| */ |
| |
| |
| |
| QPaintedTextureImagePrivate::QPaintedTextureImagePrivate() |
| : m_imageSize(256,256) |
| , m_devicePixelRatio(1.0) |
| , m_generation(0) |
| { |
| } |
| |
| QPaintedTextureImagePrivate::~QPaintedTextureImagePrivate() |
| { |
| } |
| |
| void QPaintedTextureImagePrivate::repaint() |
| { |
| // create or re-allocate QImage with current size |
| if (m_image.isNull() |
| || m_image->size() != m_imageSize |
| || m_image->devicePixelRatio() != m_devicePixelRatio) |
| { |
| m_image.reset(new QImage(m_imageSize, QImage::Format_RGBA8888)); |
| m_image->setDevicePixelRatio(m_devicePixelRatio); |
| } |
| |
| QPainter painter(m_image.data()); |
| q_func()->paint(&painter); |
| painter.end(); |
| |
| ++m_generation; |
| m_currentGenerator = QSharedPointer<QPaintedTextureImageDataGenerator>::create(*m_image.data(), m_generation, q_func()->id()); |
| q_func()->notifyDataGeneratorChanged(); |
| } |
| |
| QPaintedTextureImage::QPaintedTextureImage(Qt3DCore::QNode *parent) |
| : QAbstractTextureImage(*new QPaintedTextureImagePrivate, parent) |
| { |
| } |
| |
| QPaintedTextureImage::~QPaintedTextureImage() |
| { |
| } |
| |
| /*! |
| \property QPaintedTextureImage::width |
| |
| This property holds the width of the texture image. |
| The width must be greater than or equal to 1. |
| */ |
| int QPaintedTextureImage::width() const |
| { |
| Q_D(const QPaintedTextureImage); |
| return d->m_imageSize.width(); |
| } |
| |
| /*! |
| \property QPaintedTextureImage::height |
| |
| This property holds the height of the texture image. |
| The height must be greater than or equal to 1. |
| */ |
| int QPaintedTextureImage::height() const |
| { |
| Q_D(const QPaintedTextureImage); |
| return d->m_imageSize.height(); |
| } |
| |
| /*! |
| \property QPaintedTextureImage::size |
| |
| This property holds the size of the texture image. |
| |
| \sa height, width |
| |
| */ |
| QSize QPaintedTextureImage::size() const |
| { |
| Q_D(const QPaintedTextureImage); |
| return d->m_imageSize; |
| } |
| |
| /*! |
| Sets the width (\a w) of the texture image. Triggers an update, if the size changes. |
| */ |
| void QPaintedTextureImage::setWidth(int w) |
| { |
| if (w < 1) { |
| qWarning() << "QPaintedTextureImage: Attempting to set invalid width" << w << ". Will be ignored"; |
| return; |
| } |
| setSize(QSize(w, height())); |
| } |
| |
| /*! |
| Sets the height (\a h) of the texture image. Triggers an update, if the size changes. |
| */ |
| void QPaintedTextureImage::setHeight(int h) |
| { |
| if (h < 1) { |
| qWarning() << "QPaintedTextureImage: Attempting to set invalid height" << h << ". Will be ignored"; |
| return; |
| } |
| setSize(QSize(width(), h)); |
| } |
| |
| /*! |
| Sets the width and height of the texture image. Triggers an update, if the \a size changes. |
| */ |
| void QPaintedTextureImage::setSize(QSize size) |
| { |
| Q_D(QPaintedTextureImage); |
| |
| if (d->m_imageSize != size) { |
| if (size.isEmpty()) { |
| qWarning() << "QPaintedTextureImage: Attempting to set invalid size" << size << ". Will be ignored"; |
| return; |
| } |
| |
| const bool changeW = d->m_imageSize.width() != size.width(); |
| const bool changeH = d->m_imageSize.height() != size.height(); |
| |
| d->m_imageSize = size; |
| |
| if (changeW) |
| Q_EMIT widthChanged(d->m_imageSize.height()); |
| if (changeH) |
| Q_EMIT heightChanged(d->m_imageSize.height()); |
| |
| Q_EMIT sizeChanged(d->m_imageSize); |
| |
| d->repaint(); |
| } |
| } |
| |
| /*! |
| Schedules the painted texture's paint() function to be called, |
| which in turn uploads the new image to the GPU. |
| Parameter \a rect is currently unused. |
| */ |
| void QPaintedTextureImage::update(const QRect &rect) |
| { |
| Q_UNUSED(rect) |
| Q_D(QPaintedTextureImage); |
| |
| d->repaint(); |
| } |
| |
| /*! |
| \fn Qt3DRender::QPaintedTextureImage::paint(QPainter *painter) |
| |
| Paints the texture image with the specified QPainter object \a painter. |
| */ |
| QTextureImageDataGeneratorPtr QPaintedTextureImage::dataGenerator() const |
| { |
| Q_D(const QPaintedTextureImage); |
| return d->m_currentGenerator; |
| } |
| |
| |
| QPaintedTextureImageDataGenerator::QPaintedTextureImageDataGenerator(const QImage &image, int gen, Qt3DCore::QNodeId texId) |
| : m_image(image) // pixels are implicitly shared, no copying |
| , m_generation(gen) |
| , m_paintedTextureImageId(texId) |
| { |
| } |
| |
| QPaintedTextureImageDataGenerator::~QPaintedTextureImageDataGenerator() |
| { |
| } |
| |
| QTextureImageDataPtr QPaintedTextureImageDataGenerator::operator ()() |
| { |
| QTextureImageDataPtr textureData = QTextureImageDataPtr::create(); |
| textureData->setImage(m_image); |
| return textureData; |
| } |
| |
| bool QPaintedTextureImageDataGenerator::operator ==(const QTextureImageDataGenerator &other) const |
| { |
| const QPaintedTextureImageDataGenerator *otherFunctor = functor_cast<QPaintedTextureImageDataGenerator>(&other); |
| return (otherFunctor != nullptr && otherFunctor->m_generation == m_generation && otherFunctor->m_paintedTextureImageId == m_paintedTextureImageId); |
| } |
| |
| } // namespace Qt3DRender |
| |
| QT_END_NAMESPACE |
| |