1 files changed, 27 insertions, 0 deletions
diff --git a/source/blender/compositor/realtime_compositor/shaders/compositor_box_mask.glsl b/source/blender/compositor/realtime_compositor/shaders/compositor_box_mask.glsl
new file mode 100644
index 00000000000..fad23f28fde
--- /dev/null
+++ b/source/blender/compositor/realtime_compositor/shaders/compositor_box_mask.glsl
@@ -0,0 +1,27 @@
+#pragma BLENDER_REQUIRE(gpu_shader_compositor_texture_utilities.glsl)
+
+void main()
+{
+  ivec2 texel = ivec2(gl_GlobalInvocationID.xy);
+
+  vec2 uv = vec2(texel) / vec2(domain_size - ivec2(1));
+  uv -= location;
+  uv.y *= float(domain_size.y) / float(domain_size.x);
+  uv = mat2(cos_angle, -sin_angle, sin_angle, cos_angle) * uv;
+  bool is_inside = all(lessThan(abs(uv), size));
+
+  float base_mask_value = texture_load(base_mask_tx, texel).x;
+  float value = texture_load(mask_value_tx, texel).x;
+
+#if defined(CMP_NODE_MASKTYPE_ADD)
+  float output_mask_value = is_inside ? max(base_mask_value, value) : base_mask_value;
+#elif defined(CMP_NODE_MASKTYPE_SUBTRACT)
+  float output_mask_value = is_inside ? clamp(base_mask_value - value, 0.0, 1.0) : base_mask_value;
+#elif defined(CMP_NODE_MASKTYPE_MULTIPLY)
+  float output_mask_value = is_inside ? base_mask_value * value : 0.0;
+#elif defined(CMP_NODE_MASKTYPE_NOT)
+  float output_mask_value = is_inside ? (base_mask_value > 0.0 ? 0.0 : value) : base_mask_value;
+#endif
+
+  imageStore(output_mask_img, texel, vec4(output_mask_value));
+}