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st/mesa: always set sampler swizzle according to the texture base format

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Mainly don't (indirectly) call util_format_description here.

If the driver supports texture swizzling, this will always do the right
thing. If the driver doesn't support it, it doesn't matter.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2017-06-12 01:20:34 +02:00
parent 25723857d9
commit bfe1e7737a
1 changed files with 9 additions and 32 deletions
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41
src/mesa/state_tracker/st_sampler_view.c
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@ -189,49 +189,27 @@ swizzle_swizzle(unsigned swizzle1, unsigned swizzle2)
*/
static unsigned
compute_texture_format_swizzle(GLenum baseFormat, GLenum depthMode,
enum pipe_format actualFormat,
bool glsl130_or_later)
{
switch (baseFormat) {
case GL_RGBA:
return SWIZZLE_XYZW;
case GL_RGB:
if (util_format_has_alpha(actualFormat))
return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_ONE);
else
return SWIZZLE_XYZW;
return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_ONE);
case GL_RG:
if (util_format_get_nr_components(actualFormat) > 2)
return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_ZERO, SWIZZLE_ONE);
else
return SWIZZLE_XYZW;
return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_ZERO, SWIZZLE_ONE);
case GL_RED:
if (util_format_get_nr_components(actualFormat) > 1)
return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_ZERO,
SWIZZLE_ZERO, SWIZZLE_ONE);
else
return SWIZZLE_XYZW;
return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_ZERO,
SWIZZLE_ZERO, SWIZZLE_ONE);
case GL_ALPHA:
if (util_format_get_nr_components(actualFormat) > 1)
return MAKE_SWIZZLE4(SWIZZLE_ZERO, SWIZZLE_ZERO,
SWIZZLE_ZERO, SWIZZLE_W);
else
return SWIZZLE_XYZW;
return MAKE_SWIZZLE4(SWIZZLE_ZERO, SWIZZLE_ZERO,
SWIZZLE_ZERO, SWIZZLE_W);
case GL_LUMINANCE:
if (util_format_get_nr_components(actualFormat) > 1)
return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_ONE);
else
return SWIZZLE_XYZW;
return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_ONE);
case GL_LUMINANCE_ALPHA:
if (util_format_get_nr_components(actualFormat) > 2)
return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_W);
else
return SWIZZLE_XYZW;
return MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_W);
case GL_INTENSITY:
if (util_format_get_nr_components(actualFormat) > 1)
return SWIZZLE_XXXX;
else
return SWIZZLE_XYZW;
return SWIZZLE_XXXX;
case GL_STENCIL_INDEX:
case GL_DEPTH_STENCIL:
case GL_DEPTH_COMPONENT:
@ -301,7 +279,6 @@ get_texture_format_swizzle(const struct st_context *st,
}
tex_swizzle = compute_texture_format_swizzle(baseFormat,
depth_mode,
stObj->pt->format,
glsl130_or_later);
/* Combine the texture format swizzle with user's swizzle */