1 files changed, 28 insertions, 1 deletions

diff --git a/src/video_core/renderer_opengl/gl_shader_gen.cpp b/src/video_core/renderer_opengl/gl_shader_gen.cpp
index ecbc9d8ed..e883ffb1d 100644
--- a/src/video_core/renderer_opengl/gl_shader_gen.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_gen.cpp
@@ -29,6 +29,7 @@ layout(std140) uniform vs_config {
     vec4 viewport_flip;
     uvec4 instance_id;
     uvec4 flip_stage;
+    uvec4 alpha_test;
 };
 )";
 
@@ -105,6 +106,7 @@ layout (std140) uniform gs_config {
     vec4 viewport_flip;
     uvec4 instance_id;
     uvec4 flip_stage;
+    uvec4 alpha_test;
 };
 
 void main() {
@@ -142,8 +144,33 @@ layout (std140) uniform fs_config {
     vec4 viewport_flip;
     uvec4 instance_id;
     uvec4 flip_stage;
+    uvec4 alpha_test;
 };
 
+bool AlphaFunc(in float value) {
+    float ref = uintBitsToFloat(alpha_test[2]);
+    switch (alpha_test[1]) {
+        case 1:
+            return false;
+        case 2:
+            return value < ref;
+        case 3:
+            return value == ref;
+        case 4:
+            return value <= ref;
+        case 5:
+            return value > ref;
+        case 6:
+            return value != ref;
+        case 7:
+            return value >= ref;
+        case 8:
+            return true;
+        default:
+            return false;
+    }
+}
+
 void main() {
     exec_fragment();
 }
@@ -152,4 +179,4 @@ void main() {
     out += program.first;
     return {out, program.second};
 }
-} // namespace OpenGL::GLShader
\ No newline at end of file
+} // namespace OpenGL::GLShader