1 files changed, 23 insertions, 0 deletions
diff --git a/source/blender/draw/engines/overlay/shaders/paint_texture_frag.glsl b/source/blender/draw/engines/overlay/shaders/paint_texture_frag.glsl
new file mode 100644
index 00000000000..4d0692039a4
--- /dev/null
+++ b/source/blender/draw/engines/overlay/shaders/paint_texture_frag.glsl
@@ -0,0 +1,23 @@
+in vec2 uv_interp;
+
+out vec4 fragColor;
+
+uniform float opacity = 1.0;
+
+uniform sampler2D maskImage;
+uniform bool maskImagePremultiplied;
+uniform vec3 maskColor;
+uniform bool maskInvertStencil;
+
+void main()
+{
+  vec4 mask = vec4(texture_read_as_srgb(maskImage, maskImagePremultiplied, uv_interp).rgb, 1.0);
+  if (maskInvertStencil) {
+    mask.rgb = 1.0 - mask.rgb;
+  }
+  float mask_step = smoothstep(0, 3.0, mask.r + mask.g + mask.b);
+  mask.rgb *= maskColor;
+  mask.a = mask_step * opacity;
+
+  fragColor = mask;
+}