X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=flat_input.frag;h=78d4edd8224e4fc13e80411d51c088b5261b6d02;hp=d7c04cc5718f7fc5f0d38923932a601751426f41;hb=90ac46cdc5845432df13385f946c63b5496c685e;hpb=ef82f39846c48a654b63797b78bf8b0b8935d348

diff --git a/flat_input.frag b/flat_input.frag
index d7c04cc..78d4edd 100644
--- a/flat_input.frag
+++ b/flat_input.frag
@@ -1,4 +1,5 @@
-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
@@ -6,5 +7,17 @@ vec4 FUNCNAME(vec2 tc) {
 	// we flip the y coordinate.
 	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