1 files changed, 27 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Vulkan/Shaders/StencilDrawToMsFragmentShaderSource.frag b/Ryujinx.Graphics.Vulkan/Shaders/StencilDrawToMsFragmentShaderSource.frag
new file mode 100644
index 00000000..a07ae9d1
--- /dev/null
+++ b/Ryujinx.Graphics.Vulkan/Shaders/StencilDrawToMsFragmentShaderSource.frag
@@ -0,0 +1,27 @@
+#version 450 core
+
+#extension GL_ARB_shader_stencil_export : require
+
+layout (std140, binding = 0) uniform sample_counts_log2_in
+{
+    ivec4 sample_counts_log2;
+};
+
+layout (set = 2, binding = 0) uniform isampler2D src;
+
+void main()
+{
+    int deltaX = sample_counts_log2.x - sample_counts_log2.z;
+    int deltaY = sample_counts_log2.y - sample_counts_log2.w;
+    int samplesInXLog2 = sample_counts_log2.z;
+    int samplesInYLog2 = sample_counts_log2.w;
+    int samplesInX = 1 << samplesInXLog2;
+    int samplesInY = 1 << samplesInYLog2;
+
+    int sampleIndex = gl_SampleID;
+
+    int inX = (int(gl_FragCoord.x) << sample_counts_log2.x) | ((sampleIndex & (samplesInX - 1)) << deltaX);
+    int inY = (int(gl_FragCoord.y) << sample_counts_log2.y) | ((sampleIndex >> samplesInXLog2) << deltaY);
+
+    gl_FragStencilRefARB = texelFetch(src, ivec2(inX, inY), 0).r;
+}
+\ No newline at end of file