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authorbunnei <bunneidev@gmail.com>2018-08-19 19:21:14 +0200
committerGitHub <noreply@github.com>2018-08-19 19:21:14 +0200
commit9baf5de90cb47bdf767ff9302d586ac54e9f525d (patch)
treeb6042566a3163c5fb1ebaab711917f3441a1df64
parentMerge pull request #1103 from Subv/lop_pred (diff)
parentShaders: Implemented the gl_FrontFacing input attribute (attr 63). (diff)
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-rw-r--r--src/video_core/engines/shader_bytecode.h3
-rw-r--r--src/video_core/renderer_opengl/gl_shader_decompiler.cpp4
2 files changed, 7 insertions, 0 deletions
diff --git a/src/video_core/engines/shader_bytecode.h b/src/video_core/engines/shader_bytecode.h
index 6cfb9c5f8..059dc2e5d 100644
--- a/src/video_core/engines/shader_bytecode.h
+++ b/src/video_core/engines/shader_bytecode.h
@@ -79,6 +79,9 @@ union Attribute {
// shader, and a tuple of (TessCoord.x, TessCoord.y, TessCoord.z, ~) when inside a Tess Eval
// shader.
TessCoordInstanceIDVertexID = 47,
+ // This attribute contains a tuple of (Unk, Unk, Unk, gl_FrontFacing) when inside a fragment
+ // shader. It is unknown what the other values contain.
+ FrontFacing = 63,
};
union {
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
index 77974b9d2..4007ecc02 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -542,6 +542,10 @@ private:
// shader.
ASSERT(stage == Maxwell3D::Regs::ShaderStage::Vertex);
return "vec4(0, 0, uintBitsToFloat(instance_id.x), uintBitsToFloat(gl_VertexID))";
+ case Attribute::Index::FrontFacing:
+ // TODO(Subv): Find out what the values are for the other elements.
+ ASSERT(stage == Maxwell3D::Regs::ShaderStage::Fragment);
+ return "vec4(0, 0, 0, uintBitsToFloat(gl_FrontFacing ? 1 : 0))";
default:
const u32 index{static_cast<u32>(attribute) -
static_cast<u32>(Attribute::Index::Attribute_0)};