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util: add new helper util_format_rgb_to_bgr

Browse source 
We have BGR formats for all RGB formats where it matters except
USCALED/SSCALED. radeonsi will use it.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9615>
This commit is contained in:
Marek Olšák 2021-03-15 19:55:35 -04:00 • committed by Marge Bot
parent 5a29a55aa3
commit e3e66e1fab
2 changed files with 108 additions and 0 deletions
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101
src/util/format/u_format.c
View file

@ -994,3 +994,104 @@ util_format_snorm8_to_sint8(enum pipe_format format)
return format;
}
}
/**
* If the format is RGB, return BGR. If the format is BGR, return RGB.
* This may fail by returning PIPE_FORMAT_NONE.
*/
enum pipe_format
util_format_rgb_to_bgr(enum pipe_format format)
{
#define REMAP_RGB_ONE(r, rs, g, gs, b, bs, type) \
case PIPE_FORMAT_##r##rs##g##gs##b##bs##_##type: \
return PIPE_FORMAT_##b##bs##g##gs##r##rs##_##type;
#define REMAP_RGB(rs, gs, bs, type) \
REMAP_RGB_ONE(R, rs, G, gs, B, bs, type) \
REMAP_RGB_ONE(B, bs, G, gs, R, rs, type) \
#define REMAP_RGBA_ONE(r, rs, g, gs, b, bs, a, as, type) \
case PIPE_FORMAT_##r##rs##g##gs##b##bs##a##as##_##type: \
return PIPE_FORMAT_##b##bs##g##gs##r##rs##a##as##_##type;
#define REMAP_ARGB_ONE(a, as, r, rs, g, gs, b, bs, type) \
case PIPE_FORMAT_##a##as##r##rs##g##gs##b##bs##_##type: \
return PIPE_FORMAT_##a##as##b##bs##g##gs##r##rs##_##type;
#define REMAP_RGB_AX(A, rs, gs, bs, as, type) \
REMAP_RGBA_ONE(R, rs, G, gs, B, bs, A, as, type) \
REMAP_RGBA_ONE(B, bs, G, gs, R, rs, A, as, type) \
#define REMAP_AX_RGB(A, rs, gs, bs, as, type) \
REMAP_ARGB_ONE(A, as, R, rs, G, gs, B, bs, type) \
REMAP_ARGB_ONE(A, as, B, bs, G, gs, R, rs, type) \
#define REMAP_RGBA(rs, gs, bs, as, type) REMAP_RGB_AX(A, rs, gs, bs, as, type)
#define REMAP_RGBX(rs, gs, bs, as, type) REMAP_RGB_AX(X, rs, gs, bs, as, type)
#define REMAP_ARGB(rs, gs, bs, as, type) REMAP_AX_RGB(A, rs, gs, bs, as, type)
#define REMAP_XRGB(rs, gs, bs, as, type) REMAP_AX_RGB(X, rs, gs, bs, as, type)
#define REMAP_RGBA_ALL(rs, gs, bs, as, type) \
REMAP_RGBA(rs, gs, bs, as, type) \
REMAP_RGBX(rs, gs, bs, as, type) \
REMAP_ARGB(rs, gs, bs, as, type) \
REMAP_XRGB(rs, gs, bs, as, type)
switch (format) {
REMAP_RGB(3, 3, 2, UNORM);
REMAP_RGB(3, 3, 2, UINT);
REMAP_RGB(5, 6, 5, SRGB);
REMAP_RGB(5, 6, 5, UNORM);
REMAP_RGB(5, 6, 5, UINT);
REMAP_RGB(8, 8, 8, SRGB);
REMAP_RGB(8, 8, 8, UNORM);
REMAP_RGB(8, 8, 8, SNORM);
REMAP_RGB(8, 8, 8, UINT);
REMAP_RGB(8, 8, 8, SINT);
REMAP_RGB(8, 8, 8, USCALED);
REMAP_RGB(8, 8, 8, SSCALED);
/* Complete format sets. */
REMAP_RGBA_ALL(5, 5, 5, 1, UNORM);
REMAP_RGBA_ALL(8, 8, 8, 8, SRGB);
REMAP_RGBA_ALL(8, 8, 8, 8, UNORM);
REMAP_RGBA_ALL(8, 8, 8, 8, SNORM);
REMAP_RGBA_ALL(8, 8, 8, 8, SINT);
/* Format sets missing XRGB/XBGR. */
REMAP_RGBA(4, 4, 4, 4, UNORM);
REMAP_RGBX(4, 4, 4, 4, UNORM);
REMAP_ARGB(4, 4, 4, 4, UNORM);
REMAP_RGBA(8, 8, 8, 8, UINT);
REMAP_RGBX(8, 8, 8, 8, UINT);
REMAP_ARGB(8, 8, 8, 8, UINT);
REMAP_RGBA(10, 10, 10, 2, UNORM);
REMAP_RGBX(10, 10, 10, 2, UNORM);
REMAP_ARGB(10, 10, 10, 2, UNORM);
/* Format sets missing a half of combinations. */
REMAP_RGBA(4, 4, 4, 4, UINT);
REMAP_ARGB(4, 4, 4, 4, UINT);
REMAP_RGBA(5, 5, 5, 1, UINT);
REMAP_ARGB(5, 5, 5, 1, UINT);
REMAP_RGBA(10, 10, 10, 2, SNORM);
REMAP_RGBX(10, 10, 10, 2, SNORM);
REMAP_RGBA(10, 10, 10, 2, UINT);
REMAP_ARGB(10, 10, 10, 2, UINT);
/* Format sets having only RGBA/BGRA. */
REMAP_RGBA(8, 8, 8, 8, USCALED);
REMAP_RGBA(8, 8, 8, 8, SSCALED);
REMAP_RGBA(10, 10, 10, 2, SINT);
REMAP_RGBA(10, 10, 10, 2, USCALED);
REMAP_RGBA(10, 10, 10, 2, SSCALED);
default:
return PIPE_FORMAT_NONE;
}
}

7
src/util/format/u_format.h
View file

@ -1625,6 +1625,13 @@ util_copy_rect(ubyte * dst, enum pipe_format format,
unsigned width, unsigned height, const ubyte * src,
int src_stride, unsigned src_x, unsigned src_y);
/**
* If the format is RGB, return BGR. If the format is BGR, return RGB.
* This may fail by returning PIPE_FORMAT_NONE.
*/
enum pipe_format
util_format_rgb_to_bgr(enum pipe_format format);
#ifdef __cplusplus
} // extern "C" {
#endif