v3d: Add support for GL_SAMPLE_ALPHA_TO_ONE.

Fixes piglit ext_framebuffer_multisample-draw-buffers-alpha-to-one

diff --git a/src/broadcom/compiler/nir_to_vir.c b/src/broadcom/compiler/nir_to_vir.c
index 8012d483a720cfa6d6f260522f904f3b203ef640..89e4bc9fafae7b27bd79e6959a9552957b5b096a 100644 (file)
--- a/src/broadcom/compiler/nir_to_vir.c
+++ b/src/broadcom/compiler/nir_to_vir.c
@@ -1030,6 +1030,9 @@ emit_frag_end(struct v3d_compile *c)
                                 b = color[0];
                         }
 
+                        if (c->fs_key->sample_alpha_to_one)
+                                a = vir_uniform_f(c, 1.0);
+
                         if (c->fs_key->f32_color_rb & (1 << rt)) {
                                 inst = vir_MOV_dest(c, vir_reg(QFILE_TLBU, 0), r);
                                 inst->src[vir_get_implicit_uniform_src(inst)] =