X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=flat_input.frag;h=78d4edd8224e4fc13e80411d51c088b5261b6d02;hp=4bc055e8baec0a00f2552cea2bc65bc732e04ad8;hb=f216b7bef5a968c89f6fc78e83cc26a91e504a8a;hpb=0dc1dfe6444a700ebd2c9f006cba000b90c3a7b0

diff --git a/flat_input.frag b/flat_input.frag
index 4bc055e..78d4edd 100644
--- a/flat_input.frag
+++ b/flat_input.frag
@@ -1,10 +1,23 @@
-uniform sampler2D PREFIX(tex);
+// Implicit uniforms:
+// uniform sampler2D PREFIX(tex);
 
 vec4 FUNCNAME(vec2 tc) {
 	// OpenGL's origin is bottom-left, but most graphics software assumes
 	// a top-left origin. Thus, for inputs that come from the user,
 	// we flip the y coordinate.
-	tc.y = 1.0f - tc.y;
+	tc.y = 1.0 - tc.y;
 
-	return texture2D(PREFIX(tex), tc);
+	vec4 pixel = tex2D(PREFIX(tex), tc);
+
+	// These two are #defined to 0 or 1 in flat_input.cpp.
+#if FIXUP_SWAP_RB
+	pixel.rb = pixel.br;
+#endif
+#if FIXUP_RED_TO_GRAYSCALE
+	pixel.gb = pixel.rr;
+#endif
+	return pixel;
 }
+
+#undef FIXUP_SWAP_RB
+#undef FIXUP_RED_TO_GRAYSCALE