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Qt: Use ARGB32_Premultiplied for transparent covers

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Stenzek
2025-09-09 13:58:27 +10:00
parent 6e4da72552
commit d944966db6
1 changed files with 36 additions and 4 deletions
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40
src/duckstation-qt/gamelistwidget.cpp
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@@ -67,11 +67,43 @@ static constexpr int MIN_COVER_CACHE_ROW_BUFFER = 4;
static constexpr int MEMORY_CARD_ICON_SIZE = 16;
static constexpr int MEMORY_CARD_ICON_PADDING = 12;
static void resizeAndPadImage(QImage* image, int expected_width, int expected_height, bool fill_with_top_left, bool expand_to_fill)
static void resizeAndPadImage(QImage* image, int expected_width, int expected_height, bool fill_with_top_left,
bool expand_to_fill)
{
// Get source image in RGB32 format for QPainter.
if (image->format() != QImage::Format_RGB32)
*image = image->convertToFormat(QImage::Format_RGB32);
QImage::Format format;
switch (image->format())
{
case QImage::Format_ARGB32:
case QImage::Format_ARGB32_Premultiplied:
case QImage::Format_ARGB8565_Premultiplied:
case QImage::Format_ARGB6666_Premultiplied:
case QImage::Format_ARGB8555_Premultiplied:
case QImage::Format_ARGB4444_Premultiplied:
case QImage::Format_RGBA8888:
case QImage::Format_RGBA8888_Premultiplied:
case QImage::Format_A2BGR30_Premultiplied:
case QImage::Format_A2RGB30_Premultiplied:
case QImage::Format_Alpha8:
case QImage::Format_RGBA64:
case QImage::Format_RGBA64_Premultiplied:
case QImage::Format_RGBA16FPx4:
case QImage::Format_RGBA16FPx4_Premultiplied:
case QImage::Format_RGBA32FPx4:
case QImage::Format_RGBA32FPx4_Premultiplied:
format = QImage::Format_ARGB32_Premultiplied;
break;
default:
format = QImage::Format_RGB32;
break;
}
// fill_with_top_left is used for the game list background, which cannot be transparent.
format = fill_with_top_left ? QImage::Format_RGB32 : format;
if (image->format() != format)
*image = image->convertToFormat(format);
const qreal dpr = image->devicePixelRatio();
const int dpr_expected_width = static_cast<int>(static_cast<qreal>(expected_width) * dpr);
@@ -102,7 +134,7 @@ static void resizeAndPadImage(QImage* image, int expected_width, int expected_he
if ((image_height < dpr_expected_height) != expand_to_fill)
yoffs = static_cast<int>(static_cast<qreal>((dpr_expected_height - image_height) / 2) / dpr);
QImage padded_image(dpr_expected_width, dpr_expected_height, QImage::Format_RGB32);
QImage padded_image(dpr_expected_width, dpr_expected_height, format);
padded_image.setDevicePixelRatio(dpr);
if (fill_with_top_left)
padded_image.fill(image->pixel(0, 0));