https://bugs.kde.org/show_bug.cgi?id=359734
--- Comment #12 from Thomas Lübking <thomas.luebk...@gmail.com> --- There's something terribly odd here. The alpha channel actually works "somehow", but it seems it's interleaved with the color channels. Blue, red or black show a reasonable alpha, but even a mid gray (160,160,160) with a supposed alpha of 16 is rather opaque (maybe 160?) - and white! Converting the image to QImage::Format_ARGB32_Premultiplied or QImage::Format_RGBA8888 (it's QImage::Format_ARGB32 and I explicitly painted the content to avoid loading issues) has no impact. static xcb_render_picture_t createPicture(xcb_pixmap_t pix, int depth) always takes a depth of 32 and returns the same format (regardless of the image color) On top of that, it looks somewhat related to the composition - yellow on black seems far more opaque than yellow on white, XCB_RENDER_PICT_OP_ATOP instead of XCB_RENDER_PICT_OP_OVER doesn't change that. -- You are receiving this mail because: You are watching all bug changes.
