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| |
| #include "qrasterbackingstore_p.h" |
| |
| #include <QtGui/qbackingstore.h> |
| #include <QtGui/qpainter.h> |
| |
| #include <private/qhighdpiscaling_p.h> |
| #include <qpa/qplatformwindow.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| QRasterBackingStore::QRasterBackingStore(QWindow *window) |
| : QPlatformBackingStore(window) |
| { |
| } |
| |
| QRasterBackingStore::~QRasterBackingStore() |
| { |
| } |
| |
| void QRasterBackingStore::resize(const QSize &size, const QRegion &staticContents) |
| { |
| Q_UNUSED(staticContents); |
| m_requestedSize = size; |
| } |
| |
| QImage::Format QRasterBackingStore::format() const |
| { |
| if (window()->format().hasAlpha()) |
| return QImage::Format_ARGB32_Premultiplied; |
| else |
| return QImage::Format_RGB32; |
| } |
| |
| QPaintDevice *QRasterBackingStore::paintDevice() |
| { |
| return &m_image; |
| } |
| |
| QImage QRasterBackingStore::toImage() const |
| { |
| return m_image; |
| } |
| |
| bool QRasterBackingStore::scroll(const QRegion ®ion, int dx, int dy) |
| { |
| if (window()->surfaceType() != QSurface::RasterSurface) |
| return false; |
| |
| extern void qt_scrollRectInImage(QImage &, const QRect &, const QPoint &); |
| |
| const qreal devicePixelRatio = m_image.devicePixelRatio(); |
| const QPoint delta(dx * devicePixelRatio, dy * devicePixelRatio); |
| |
| for (const QRect &rect : region) |
| qt_scrollRectInImage(m_image, QRect(rect.topLeft() * devicePixelRatio, rect.size() * devicePixelRatio), delta); |
| |
| return true; |
| } |
| |
| void QRasterBackingStore::beginPaint(const QRegion ®ion) |
| { |
| qreal nativeWindowDevicePixelRatio = window()->handle()->devicePixelRatio(); |
| QSize effectiveBufferSize = m_requestedSize * nativeWindowDevicePixelRatio; |
| if (m_image.devicePixelRatio() != nativeWindowDevicePixelRatio || m_image.size() != effectiveBufferSize) { |
| m_image = QImage(effectiveBufferSize, format()); |
| m_image.setDevicePixelRatio(nativeWindowDevicePixelRatio); |
| if (m_image.format() == QImage::Format_ARGB32_Premultiplied) |
| m_image.fill(Qt::transparent); |
| } |
| |
| if (!m_image.hasAlphaChannel()) |
| return; |
| |
| QPainter painter(&m_image); |
| painter.setCompositionMode(QPainter::CompositionMode_Source); |
| for (const QRect &rect : region) |
| painter.fillRect(rect, Qt::transparent); |
| } |
| |
| QT_END_NAMESPACE |