1 files changed, 39 insertions, 0 deletions
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_deferred_background_frag.glsl b/source/blender/draw/engines/workbench/shaders/workbench_deferred_background_frag.glsl
new file mode 100644
index 00000000000..9e4394238ff
--- /dev/null
+++ b/source/blender/draw/engines/workbench/shaders/workbench_deferred_background_frag.glsl
@@ -0,0 +1,39 @@
+
+uniform usampler2D objectId;
+
+uniform vec2 invertedViewportSize;
+
+out vec4 fragColor;
+
+layout(std140) uniform world_block {
+	WorldData world_data;
+};
+
+void main()
+{
+	vec2 uv_viewport = gl_FragCoord.xy * invertedViewportSize;
+	vec3 background = background_color(world_data, uv_viewport.y);
+
+#ifndef V3D_SHADING_OBJECT_OUTLINE
+
+	fragColor = vec4(background, world_data.background_alpha);
+
+#else /* !V3D_SHADING_OBJECT_OUTLINE */
+
+	ivec2 texel = ivec2(gl_FragCoord.xy);
+	uint object_id = texelFetch(objectId, texel, 0).r;
+	float object_outline = calculate_object_outline(objectId, texel, object_id);
+
+	if (object_outline == 0.0) {
+		fragColor = vec4(background, world_data.background_alpha);
+	}
+	else {
+		/* Do correct alpha blending. */
+		vec4 background_color = vec4(background, 1.0) * world_data.background_alpha;
+		vec4 outline_color = vec4(world_data.object_outline_color.rgb, 1.0);
+		fragColor = mix(outline_color, background_color, object_outline);
+		fragColor = vec4(fragColor.rgb / max(1e-8, fragColor.a), fragColor.a);
+	}
+
+#endif /* !V3D_SHADING_OBJECT_OUTLINE */
+}