X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=builtin_data%2F_ambientocclusion_combine.glsl;fp=builtin_data%2F_ambientocclusion_combine.glsl;h=616bada9e4b88b5cda6c5b139a363bd1a907d261;hb=9a63244c1342337915c4610401a24c09fa72cc3d;hp=0000000000000000000000000000000000000000;hpb=73bef37da97b6da0b99227f63235cb52c4e56c44;p=libs%2Fgl.git

diff --git a/builtin_data/_ambientocclusion_combine.glsl b/builtin_data/_ambientocclusion_combine.glsl
new file mode 100644
index 00000000..616bada9
--- /dev/null
+++ b/builtin_data/_ambientocclusion_combine.glsl
@@ -0,0 +1,29 @@
+import postprocess;
+import _ambientocclusion;
+
+#pragma MSP stage(fragment)
+void main()
+{
+	vec3 center = unproject(vec3(vertex.xy, texture(depth, texcoord).r));
+	vec2 tex_scale = 1.0/vec2(textureSize(occlusion, 0));
+	float sum = 0.0;
+	float count = 0.0;
+	for(int i=0; i<4; ++i)
+		for(int j=0; j<4; ++j)
+		{
+			vec2 offset = vec2(float(i), float(j))-1.5;
+			vec2 sample_coord = texcoord+offset*tex_scale;
+			float occ = texture(occlusion, sample_coord).r;
+			float sample = texture(depth, sample_coord).r;
+			float z_range = occlusion_radius*length(offset)*edge_depth_threshold;
+			float min_depth = project(vec3(center.xy, center.z+z_range)).z;
+			float max_depth = project(vec3(center.xy, center.z-z_range)).z;
+			if(sample>=min_depth && sample<=max_depth)
+			{
+				sum += occ;
+				count += 1.0;
+			}
+		}
+	vec4 src_color = texture(source, texcoord);
+	frag_color = vec4(src_color.rgb*mix(1.0, min(sum*2.0/count, 1.0), darkness), src_color.a);
+}