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Merge branch 'premultiplication' [cogl-texture docs] Improves the documentation of the internal_format args [test-premult] Adds a unit test for texture upload premultiplication semantics [fog] Document that fogging only works with opaque or unmultipled colors [test-blend-strings] Explicitly request RGBA_888 tex format for test textures [premultiplication] Be more conservative with what data gets premultiplied [bitmap] Fixes _cogl_bitmap_fallback_unpremult [cogl-bitmap] Fix minor copy and paste error in _cogl_bitmap_fallback_premult Avoid unnecesary unpremultiplication when saving to local data Don't unpremultiply Cairo data Default to a blend function that expects premultiplied colors Implement premultiplication for CoglBitmap Use correct texture format for pixmap textures and FBO's Add cogl_color_premultiply()