1 files changed, 30 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Vulkan/Shaders/StencilDrawToNonMsFragmentShaderSource.frag b/Ryujinx.Graphics.Vulkan/Shaders/StencilDrawToNonMsFragmentShaderSource.frag
new file mode 100644
index 00000000..3addd9d1
--- /dev/null
+++ b/Ryujinx.Graphics.Vulkan/Shaders/StencilDrawToNonMsFragmentShaderSource.frag
@@ -0,0 +1,30 @@
+#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 isampler2DMS srcMS;
+
+void main()
+{
+    uvec2 coords = uvec2(gl_FragCoord.xy);
+
+    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 sampleIdx = ((int(coords.x) >> deltaX) & (samplesInX - 1)) | (((int(coords.y) >> deltaY) & (samplesInY - 1)) << samplesInXLog2);
+
+    samplesInXLog2 = sample_counts_log2.x;
+    samplesInYLog2 = sample_counts_log2.y;
+
+    ivec2 shiftedCoords = ivec2(int(coords.x) >> samplesInXLog2, int(coords.y) >> samplesInYLog2);
+
+    gl_FragStencilRefARB = texelFetch(srcMS, shiftedCoords, sampleIdx).r;
+}
+\ No newline at end of file