diff options
| author | Melissa Wen <[email protected]> | 2020-08-25 08:45:32 -0300 |
|---|---|---|
| committer | Rodrigo Siqueira <[email protected]> | 2020-08-30 09:23:26 -0400 |
| commit | 39cba5cf8c2c23c9c1fe3e0a8612d4f2d932d79b (patch) | |
| tree | 343323078c3d8c073c19b30a8b1e46397f404bcf /scripts/gcc-plugins/cyc_complexity_plugin.c | |
| parent | 3b8095169982ff4ec2a1b4be61b7224bbef23b48 (diff) | |
drm/vkms: add alpha-premultiplied color blending
The VKMS blend function was ignoring the alpha channel and just
overwriting vaddr_src with vaddr_dst. This XRGB approach triggers a
warning when running the kms_cursor_crc/cursor-alpha-transparent test
case. In IGT, cairo_format_argb32 uses premultiplied alpha (according to
documentation). Also current DRM assumption is that alpha is
premultiplied. Therefore, this patch considers premultiplied alpha
blending eq to compose vaddr_src with vaddr_dst.
This change removes the following cursor-alpha-transparent warning:
"Suspicious CRC: All values are 0."
V2:
- static for local functions
- const for the read-only variable argb_src
- replaces variable names
- drops unnecessary comment
Cc: Daniel Vetter <[email protected]>
Cc: Rodrigo Siqueira <[email protected]>
Cc: Haneen Mohammed <[email protected]>
Signed-off-by: Melissa Wen <[email protected]>
Reviewed-by: Rodrigo Siqueira <[email protected]>
Signed-off-by: Rodrigo Siqueira <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'scripts/gcc-plugins/cyc_complexity_plugin.c')
0 files changed, 0 insertions, 0 deletions