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mesa/format_utils: Add a fast-path for RGBA to BGRA

Browse source 
This is similar to an existing fast-path, but this is for an array
source while the existing one is for an array destination.

Firefox can hit this case for WebGL when GL compositing is not used.
For a WebGL sample on the Panfrost driver, the frame-rate increased
from 19.4 fps to 20.6 fps, which is a 6% gain.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4315>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4315>
This commit is contained in:
Icecream95 2020-03-25 20:01:08 +13:00 • committed by Marge Bot
parent 0847fe6e7f
commit dac1573a35
1 changed files with 9 additions and 0 deletions
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9
src/mesa/main/format_utils.c
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@ -36,6 +36,10 @@ const mesa_array_format RGBA8_UBYTE =
MESA_ARRAY_FORMAT(MESA_ARRAY_FORMAT_BASE_FORMAT_RGBA_VARIANTS,
1, 0, 0, 1, 4, 0, 1, 2, 3);
const mesa_array_format BGRA8_UBYTE =
MESA_ARRAY_FORMAT(MESA_ARRAY_FORMAT_BASE_FORMAT_RGBA_VARIANTS,
1, 0, 0, 1, 4, 2, 1, 0, 3);
const mesa_array_format RGBA32_UINT =
MESA_ARRAY_FORMAT(MESA_ARRAY_FORMAT_BASE_FORMAT_RGBA_VARIANTS,
4, 0, 0, 0, 4, 0, 1, 2, 3);
@ -350,6 +354,11 @@ _mesa_format_convert(void *void_dst, uint32_t dst_format, size_t dst_stride,
dst += dst_stride;
}
return;
} else if (dst_array_format == BGRA8_UBYTE &&
src_format == MESA_FORMAT_R8G8B8A8_UNORM) {
convert_ubyte_rgba_to_bgra(width, height, src, src_stride,
dst, dst_stride);
return;
} else if (dst_array_format == RGBA32_UINT &&
_mesa_is_format_unsigned(src_format)) {
assert(_mesa_is_format_integer_color(src_format));