1 files changed, 24 insertions, 0 deletions
diff --git a/source/blender/draw/modes/shaders/edit_mesh_overlay_mix_frag.glsl b/source/blender/draw/modes/shaders/edit_mesh_overlay_mix_frag.glsl
new file mode 100644
index 00000000000..f567a3a5cbd
--- /dev/null
+++ b/source/blender/draw/modes/shaders/edit_mesh_overlay_mix_frag.glsl
@@ -0,0 +1,24 @@
+
+out vec4 FragColor;
+
+uniform sampler2D wireColor;
+uniform sampler2D wireDepth;
+uniform sampler2D sceneDepth;
+uniform float alpha;
+
+void main()
+{
+	ivec2 uv = ivec2(gl_FragCoord.xy);
+	float wire_depth = texelFetch(wireDepth, uv, 0).r;
+	float scene_depth = texelFetch(sceneDepth, uv, 0).r;
+	vec4 wire_color = texelFetch(wireColor, uv, 0).rgba;
+
+	FragColor = wire_color;
+
+	/* this works because not rendered depth is 1.0 and the
+	 * following test is always true even when no wires */
+	if ((wire_depth > scene_depth) && (wire_color.a > 0)) {
+		/* Note : Using wire_color.a * alpha produce unwanted result */
+		FragColor.a = alpha;
+	}
+}