nv50/ir: enable early fragment test with explicit user control

This feature can be enabled in two ways: as an optimization and by
explicit user control (with OpenGL 4.2 or ARB_shader_image_load_store).

This makes use of the recent TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL to
force early fragment tests when needed.

This fixes a bunch of
dEQP-GLES31.functional.image_load_store.early_fragment_tests.* tests.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
index 22aea71..e57761f 100644 (file)
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
@@ -1052,6 +1052,9 @@ void Source::scanProperty(const struct tgsi_full_property *prop)
    case TGSI_PROPERTY_NEXT_SHADER:
       /* Do not need to know the next shader stage. */
       break;
+   case TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL:
+      info->prop.fp.earlyFragTests = prop->u[0].Data;
+      break;
    default:
       INFO("unhandled TGSI property %d\n", prop->Property.PropertyName);
       break;