1 files changed, 21 insertions, 0 deletions
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_material_lib.glsl b/source/blender/draw/engines/workbench/shaders/workbench_material_lib.glsl
new file mode 100644
index 00000000000..1d8950e34b3
--- /dev/null
+++ b/source/blender/draw/engines/workbench/shaders/workbench_material_lib.glsl
@@ -0,0 +1,21 @@
+
+layout(std140) uniform material_block
+{
+  vec4 mat_data[4096];
+};
+
+/* If set to -1, the resource handle is used instead. */
+uniform int materialIndex;
+
+void workbench_material_data_get(
+    int handle, out vec3 color, out float alpha, out float roughness, out float metallic)
+{
+  handle = (materialIndex != -1) ? materialIndex : handle;
+  vec4 data = mat_data[uint(handle) & 0xFFFu];
+  color = data.rgb;
+
+  uint encoded_data = floatBitsToUint(data.w);
+  alpha = float((encoded_data >> 16u) & 0xFFu) * (1.0 / 255.0);
+  roughness = float((encoded_data >> 8u) & 0xFFu) * (1.0 / 255.0);
+  metallic = float(encoded_data & 0xFFu) * (1.0 / 255.0);
+}