1 files changed, 29 insertions, 0 deletions
diff --git a/source/blender/draw/modes/shaders/edit_mesh_overlay_facefill_frag.glsl b/source/blender/draw/modes/shaders/edit_mesh_overlay_facefill_frag.glsl
new file mode 100644
index 00000000000..23b794d9b8b
--- /dev/null
+++ b/source/blender/draw/modes/shaders/edit_mesh_overlay_facefill_frag.glsl
@@ -0,0 +1,29 @@
+
+/* Solid Wirefram implementation
+ * Mike Erwin, Clément Foucault */
+
+/* This shader follows the principles of
+ * http://developer.download.nvidia.com/SDK/10/direct3d/Source/SolidWireframe/Doc/SolidWireframe.pdf */
+
+flat in vec4 faceColor;
+flat in int faceActive;
+
+out vec4 FragColor;
+
+const vec4 stipple_matrix[4] = vec4[4](
+	vec4(1.0, 0.0, 0.0, 0.0),
+	vec4(0.0, 0.0, 0.0, 0.0),
+	vec4(0.0, 0.0, 1.0, 0.0),
+	vec4(0.0, 0.0, 0.0, 0.0)
+);
+
+void main()
+{
+	FragColor = faceColor;
+
+	if (faceActive == 1) {
+		int x = int(gl_FragCoord.x) & 0x3; /* mod 4 */
+		int y = int(gl_FragCoord.y) & 0x3; /* mod 4 */
+		FragColor *= stipple_matrix[x][y];
+	}
+}