X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=footer.comp;h=c59a93de6f3eb271c26fa4d05f99df7a629b357f;hp=a28014d684b69af8985b9fe911b2db400c089a6c;hb=10bcc7948c3911f1e4459c98205726334998229e;hpb=e683d4e49549b2d4c6906d2ebc4184904f4fe9f8

diff --git a/footer.comp b/footer.comp
index a28014d..c59a93d 100644
--- a/footer.comp
+++ b/footer.comp
@@ -5,6 +5,10 @@
 #define SQUARE_ROOT_TRANSFORMATION 0
 #endif
 
+#ifndef FLIP_ORIGIN
+#define FLIP_ORIGIN 0
+#endif
+
 void main()
 {
 	INPUT();
@@ -22,13 +26,21 @@ void cs_output(uvec2 coord, vec4 val)
 
 void cs_output(ivec2 coord, vec4 val)
 {
-	// Run the value through any preprocessing steps we might have.
+	// Run the value through any postprocessing steps we might have.
+	// Note that we need to give in the actual coordinates, since the
+	// effect could have multiple (non-compute) inputs, and would also
+	// be allowed to make effects based on the texture coordinate alone.
 	CS_OUTPUT_VAL = val;
-	val = CS_POSTPROC(vec2(0.0, 0.0));
+	val = CS_POSTPROC(NORMALIZE_TEXTURE_COORDS(coord));
 
 #if SQUARE_ROOT_TRANSFORMATION
 	// Make sure we don't give negative values to sqrt.
 	val.rgb = sqrt(max(val.rgb, 0.0));
 #endif
-	imageStore(outbuf, coord, val);
+
+#if FLIP_ORIGIN
+	coord.y = imageSize(tex_outbuf).y - coord.y - 1;
+#endif
+
+	imageStore(tex_outbuf, coord, val);
 }