1 files changed, 14 insertions, 0 deletions
diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_depth_merge_vert.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_depth_merge_vert.glsl
new file mode 100644
index 00000000000..1e5a900f486
--- /dev/null
+++ b/source/blender/draw/engines/gpencil/shaders/gpencil_depth_merge_vert.glsl
@@ -0,0 +1,14 @@
+
+uniform vec4 gpModelMatrix[4];
+
+noperspective out vec4 uvcoordsvar;
+
+void main()
+{
+  mat4 model_matrix = mat4(gpModelMatrix[0], gpModelMatrix[1], gpModelMatrix[2], gpModelMatrix[3]);
+  int v = gl_VertexID % 3;
+  float x = -1.0 + float((v & 1) << 2);
+  float y = -1.0 + float((v & 2) << 1);
+  gl_Position = ViewProjectionMatrix * (model_matrix * vec4(x, y, 0.0, 1.0));
+  uvcoordsvar = vec4((gl_Position.xy / gl_Position.w + 1.0) * 0.5, 0.0, 0.0);
+}