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r300: Set up shadow sampler lowering in precompiles. 

Otherwise you end up lowering all shadow samples to a MOV dst
temp[0].0000, which is pretty silly.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14847>
This commit is contained in:
Emma Anholt 2022-02-02 21:08:13 -08:00
parent 5f55e7b845
commit 17cea74b8c
1 changed files with 10 additions and 3 deletions
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13
src/gallium/drivers/r300/r300_state.c
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@ -1053,12 +1053,19 @@ static void* r300_create_fs_state(struct pipe_context* pipe,
/* Precompile the fragment shader at creation time to avoid jank at runtime.
* In most cases we won't have anything in the key at draw time.
*
* TODO: precompile state for shadow samplers (but this needs a decision for
* the default shadow compare and texture swizzle values).
*/
struct r300_fragment_program_external_state precompile_state;
memset(&precompile_state, 0, sizeof(precompile_state));
struct tgsi_shader_info info;
tgsi_scan_shader(fs->state.tokens, &info);
for (int i = 0; i < PIPE_MAX_SHADER_SAMPLER_VIEWS; i++) {
if (info.sampler_targets[i] == TGSI_TEXTURE_SHADOW1D ||
info.sampler_targets[i] == TGSI_TEXTURE_SHADOW2D) {
precompile_state.unit[i].compare_mode_enabled = true;
precompile_state.unit[i].texture_compare_func = PIPE_FUNC_LESS;
}
}
r300_pick_fragment_shader(r300, fs, &precompile_state);
return (void *)fs;