Fixes the following piglit tests:
arb_blend_func_extended-fbo-extended-blend
arb_blend_func_extended-fbo-extended-blend-explicit
arb_blend_func_extended-fbo-extended-blend-explicit_gles3
arb_blend_func_extended-fbo-extended-blend-pattern
arb_blend_func_extended-fbo-extended-blend-pattern_gles2
arb_blend_func_extended-fbo-extended-blend-pattern_gles3
arb_blend_func_extended-fbo-extended-blend_gles3
ext_framebuffer_multisample/alpha-to-coverage-dual-src-blend
ext_framebuffer_multisample/alpha-to-one-dual-src-blend
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
if (nir->info.stage == MESA_SHADER_FRAGMENT) {
tgsi_get_gl_frag_result_semantic(variable->data.location,
&semantic_name, &semantic_index);
+
+ /* Adjust for dual source blending */
+ if (variable->data.index > 0) {
+ semantic_index++;
+ }
} else {
tgsi_get_gl_varying_semantic(variable->data.location, true,
&semantic_name, &semantic_index);