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f944d419a3
_cogl_bitmap_convert_format_and_premult was failing when converting from RGBA to RGB and vice versa. _cogl_bitmap_fallback_convert converts without altering the premult status so when choosing a new format it would copy over the premult bit. However, it did this regardless of whether the new format had an alpha channel so when converting from RGBA_8888_PRE to RGB_888 it would end up inventing a new meaningless format which would be RGB_888_PRE. This patch makes it avoid copying the premult flag if the destination has no alpha. It doesn't matter if it copies when the source format has no alpha because it will always be unset. _cogl_bitmap_convert_format_and_premult was also breaking when converting from RGBA_8888_PRE to RGB_888 because it would think RGB_888 is unpremultiplied and try to convert but then _cogl_bitmap_fallback_premult wouldn't know how to do the conversion. http://bugzilla.openedhand.com/show_bug.cgi?id=2057 |
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