1 files changed, 32 insertions, 0 deletions
diff --git a/source/blender/draw/engines/gpencil/shaders/fx/gpencil_fx_shadow_resolve_frag.glsl b/source/blender/draw/engines/gpencil/shaders/fx/gpencil_fx_shadow_resolve_frag.glsl
new file mode 100644
index 00000000000..633dcf1fd63
--- /dev/null
+++ b/source/blender/draw/engines/gpencil/shaders/fx/gpencil_fx_shadow_resolve_frag.glsl
@@ -0,0 +1,32 @@
+/* ******************************************************************* */
+/* Resolve Shadow pass                                                 */
+/* ******************************************************************* */
+uniform sampler2D strokeColor;
+uniform sampler2D strokeDepth;
+uniform sampler2D shadowColor;
+uniform sampler2D shadowDepth;
+
+out vec4 FragColor;
+
+void main()
+{
+	ivec2 uv = ivec2(gl_FragCoord.xy);
+
+	float stroke_depth = texelFetch(strokeDepth, uv.xy, 0).r;
+	float shadow_depth = texelFetch(shadowDepth, uv.xy, 0).r;
+	vec4 stroke_pixel= texelFetch(strokeColor, uv.xy, 0);
+	vec4 shadow_pixel= texelFetch(shadowColor, uv.xy, 0);
+
+	/* copy original pixel */
+	vec4 outcolor = stroke_pixel;
+	float outdepth = stroke_depth;
+
+	/* if stroke is not on top, copy shadow */
+	if ((stroke_pixel.a <= 0.2) && (shadow_pixel.a > 0.0))  {
+		outcolor = shadow_pixel;
+		outdepth = shadow_depth;
+	}
+	
+	gl_FragDepth = outdepth;
+	FragColor = outcolor;
+}