diff options
Diffstat (limited to 'src/plugins/platforms/xcb/qxcbimage.cpp')
-rw-r--r-- | src/plugins/platforms/xcb/qxcbimage.cpp | 144 |
1 files changed, 97 insertions, 47 deletions
diff --git a/src/plugins/platforms/xcb/qxcbimage.cpp b/src/plugins/platforms/xcb/qxcbimage.cpp index 9fb0d44b74..e259fbf0b4 100644 --- a/src/plugins/platforms/xcb/qxcbimage.cpp +++ b/src/plugins/platforms/xcb/qxcbimage.cpp @@ -53,39 +53,108 @@ extern "C" { #undef template #endif +#include "qxcbconnection.h" +#include "qxcbintegration.h" + +namespace { + +QImage::Format imageFormatForMasks(int depth, int bits_per_pixel, int red_mask, int blue_mask) +{ + if (bits_per_pixel == 32) { + switch (depth) { + case 32: + if (red_mask == 0xff0000 && blue_mask == 0xff) + return QImage::Format_ARGB32_Premultiplied; +#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN + if (red_mask == 0xff && blue_mask == 0xff0000) + return QImage::Format_RGBA8888_Premultiplied; +#else + if (red_mask == 0xff000000 && blue_mask == 0xff00) + return QImage::Format_RGBA8888_Premultiplied; +#endif + if (red_mask == 0x3ff && blue_mask == 0x3ff00000) + return QImage::Format_A2BGR30_Premultiplied; + if (red_mask == 0x3ff00000 && blue_mask == 0x3ff) + return QImage::Format_A2RGB30_Premultiplied; + break; + case 30: + if (red_mask == 0x3ff && blue_mask == 0x3ff00000) + return QImage::Format_BGR30; + if (blue_mask == 0x3ff && red_mask == 0x3ff00000) + return QImage::Format_RGB30; + break; + case 24: + if (red_mask == 0xff0000 && blue_mask == 0xff) + return QImage::Format_RGB32; +#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN + if (red_mask == 0xff && blue_mask == 0xff0000) + return QImage::Format_RGBX8888; +#else + if (red_mask == 0xff000000 && blue_mask == 0xff00) + return QImage::Format_RGBX8888; +#endif + break; + } + } else if (bits_per_pixel == 16) { + if (depth == 16 && red_mask == 0xf800 && blue_mask == 0x1f) + return QImage::Format_RGB16; + if (depth == 15 && red_mask == 0x7c00 && blue_mask == 0x1f) + return QImage::Format_RGB555; + } + return QImage::Format_Invalid; +} + +} // namespace + QT_BEGIN_NAMESPACE -// TODO: Merge with imageFormatForVisual in qxcbwindow.cpp -QImage::Format qt_xcb_imageFormatForVisual(QXcbConnection *connection, uint8_t depth, - const xcb_visualtype_t *visual) +bool qt_xcb_imageFormatForVisual(QXcbConnection *connection, uint8_t depth, const xcb_visualtype_t *visual, + QImage::Format *imageFormat, bool *needsRgbSwap) { - const xcb_format_t *format = connection->formatForDepth(depth); + Q_ASSERT(connection && visual && imageFormat); + + if (needsRgbSwap) + *needsRgbSwap = false; + *imageFormat = QImage::Format_Invalid; - if (!visual || !format) - return QImage::Format_Invalid; + if (depth == 8) { + if (visual->_class == XCB_VISUAL_CLASS_GRAY_SCALE) { + *imageFormat = QImage::Format_Grayscale8; + return true; + } +#if QT_CONFIG(xcb_native_painting) + if (QXcbIntegration::instance() && QXcbIntegration::instance()->nativePaintingEnabled()) { + *imageFormat = QImage::Format_Indexed8; + return true; + } +#endif + return false; + } - if (depth == 32 && format->bits_per_pixel == 32 && visual->red_mask == 0xff0000 - && visual->green_mask == 0xff00 && visual->blue_mask == 0xff) - return QImage::Format_ARGB32_Premultiplied; + const xcb_format_t *format = connection->formatForDepth(depth); + if (!format) + return false; - if (depth == 30 && format->bits_per_pixel == 32 && visual->red_mask == 0x3ff - && visual->green_mask == 0x0ffc00 && visual->blue_mask == 0x3ff00000) - return QImage::Format_BGR30; + const bool connectionEndianSwap = connection->imageNeedsEndianSwap(); + // We swap the masks and see if we can recognize it as a host format + const quint32 red_mask = connectionEndianSwap ? qbswap(visual->red_mask) : visual->red_mask; + const quint32 blue_mask = connectionEndianSwap ? qbswap(visual->blue_mask) : visual->blue_mask; - if (depth == 30 && format->bits_per_pixel == 32 && visual->blue_mask == 0x3ff - && visual->green_mask == 0x0ffc00 && visual->red_mask == 0x3ff00000) - return QImage::Format_RGB30; + *imageFormat = imageFormatForMasks(depth, format->bits_per_pixel, red_mask, blue_mask); + if (*imageFormat != QImage::Format_Invalid) + return true; - if (depth == 24 && format->bits_per_pixel == 32 && visual->red_mask == 0xff0000 - && visual->green_mask == 0xff00 && visual->blue_mask == 0xff) - return QImage::Format_RGB32; + if (needsRgbSwap) { + *imageFormat = imageFormatForMasks(depth, format->bits_per_pixel, blue_mask, red_mask); + if (*imageFormat != QImage::Format_Invalid) { + *needsRgbSwap = true; + return true; + } + } - if (depth == 16 && format->bits_per_pixel == 16 && visual->red_mask == 0xf800 - && visual->green_mask == 0x7e0 && visual->blue_mask == 0x1f) - return QImage::Format_RGB16; + qWarning("Unsupported screen format: depth: %d, bits_per_pixel: %d, red_mask: %x, blue_mask: %x", depth, format->bits_per_pixel, red_mask, blue_mask); - qWarning("qt_xcb_imageFormatForVisual did not recognize format"); - return QImage::Format_Invalid; + return false; } QPixmap qt_xcb_pixmapFromXPixmap(QXcbConnection *connection, xcb_pixmap_t pixmap, @@ -105,33 +174,14 @@ QPixmap qt_xcb_pixmapFromXPixmap(QXcbConnection *connection, xcb_pixmap_t pixmap QPixmap result; - QImage::Format format = qt_xcb_imageFormatForVisual(connection, depth, visual); - if (format != QImage::Format_Invalid) { + QImage::Format format; + bool needsRgbSwap; + if (qt_xcb_imageFormatForVisual(connection, depth, visual, &format, &needsRgbSwap)) { uint32_t bytes_per_line = length / height; QImage image(const_cast<uint8_t *>(data), width, height, bytes_per_line, format); - // we may have to swap the byte order - if (connection->imageNeedsEndianSwap()) { - if (image.depth() == 16) { - for (int i = 0; i < image.height(); ++i) { - ushort *p = reinterpret_cast<ushort *>(image.scanLine(i)); - ushort *end = p + image.width(); - while (p < end) { - *p = qbswap(*p); - p++; - } - } - } else if (image.depth() == 32) { - for (int i = 0; i < image.height(); ++i) { - uint *p = reinterpret_cast<uint *>(image.scanLine(i)); - uint *end = p + image.width(); - while (p < end) { - *p = qbswap(*p); - p++; - } - } - } - } + if (needsRgbSwap) + image = std::move(image).rgbSwapped(); // fix-up alpha channel if (format == QImage::Format_RGB32) { |