GLSL: Support a workaround for loading row-major matrices.

On AMD Windows OpenGL, it has been reported that we need to load
matrices via a wrapper function.

1 files changed, 44 insertions, 0 deletions

diff --git a/shaders/frag/ubo-load-row-major-workaround.frag b/shaders/frag/ubo-load-row-major-workaround.frag
new file mode 100644
index 00000000..03205ee8
--- /dev/null
+++ b/shaders/frag/ubo-load-row-major-workaround.frag
@@ -0,0 +1,44 @@
+#version 450
+
+struct RowMajor
+{
+	mat4 B;
+};
+
+struct NestedRowMajor
+{
+	RowMajor rm;
+};
+
+layout(set = 0, binding = 0, row_major) uniform UBO
+{
+	mat4 A;
+	layout(column_major) mat4 C; // This should also be worked around.
+};
+
+
+layout(set = 0, binding = 1, row_major) uniform UBO2
+{
+	RowMajor rm;
+};
+
+layout(set = 0, binding = 2, row_major) uniform UBO3
+{
+	NestedRowMajor rm2;
+};
+
+layout(set = 0, binding = 3) uniform UBONoWorkaround
+{
+	mat4 D;
+};
+
+layout(location = 0) in vec4 Clip;
+layout(location = 0) out vec4 FragColor;
+
+void main()
+{
+	NestedRowMajor rm2_loaded = rm2;
+	FragColor = rm2_loaded.rm.B * rm.B * A * C * Clip;
+	FragColor += D * Clip;
+	FragColor += A[1] * Clip;
+}