[Webkit-unassigned] [Bug 88703] [Qt][Texmap] All layers with backingStore are opaque when using TextureMapperGL.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=88703





--- Comment #2 from Huang Dongsung <luxtella at company100.net>  2012-06-09 00:32:16 PST ---
Following code causes this bug.

void TextureMapperLayer::updateBackingStore(TextureMapper* textureMapper, GraphicsLayerTextureMapper* layer)
{
    ...
    // Paint the entire dirty rect into an image buffer. This ensures we only paint once.
    OwnPtr<ImageBuffer> imageBuffer = ImageBuffer::create(dirtyRect.size());
    ...
    RefPtr<Image> image = imageBuffer->copyImage(DontCopyBackingStore);
    TextureMapperTiledBackingStore* backingStore = static_cast<TextureMapperTiledBackingStore*>(m_backingStore.get());
    backingStore->updateContents(textureMapper, image.get(), m_size, dirtyRect);
    ...
}

void TextureMapperTiledBackingStore::updateContents(TextureMapper* textureMapper, Image* image, const FloatSize& totalSize, const IntRect& dirtyRect)
{
    createOrDestroyTilesIfNeeded(totalSize, textureMapper->maxTextureSize(), image->currentFrameHasAlpha());
    for (size_t i = 0; i < m_tiles.size(); ++i)
        m_tiles[i].updateContents(textureMapper, image, dirtyRect);
}

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