Allow adjusting the output Y'CbCr coefficients after finalize.

[movit] / ycbcr_conversion_effect.frag

diff --git a/ycbcr_conversion_effect.frag b/ycbcr_conversion_effect.frag
index 4ef38016a7240e88023e32b7b5e0a8764b372526..ef289df8fa34dc35ddf74858d8a351227b96de12 100644 (file)
--- a/ycbcr_conversion_effect.frag
+++ b/ycbcr_conversion_effect.frag
@@ -17,16 +17,16 @@ vec4 FUNCNAME(vec2 tc) {
 
        ycbcr_a.rgb = PREFIX(ycbcr_matrix) * rgba.rgb + PREFIX(offset);
 
-#if YCBCR_CLAMP_RANGE
-       // If we use limited-range Y'CbCr, the card's usual 0–255 clamping
-       // won't be enough, so we need to clamp ourselves here.
-       //
-       // We clamp before dither, which is a bit unfortunate, since
-       // it means dither can take us out of the clamped range again.
-       // However, since DitherEffect never adds enough dither to change
-       // the quantized levels, we will be fine in practice.
-       ycbcr_a.rgb = clamp(ycbcr_a.rgb, PREFIX(ycbcr_min), PREFIX(ycbcr_max));
-#endif
+       if (PREFIX(clamp_range)) {
+               // If we use limited-range Y'CbCr, the card's usual 0–255 clamping
+               // won't be enough, so we need to clamp ourselves here.
+               //
+               // We clamp before dither, which is a bit unfortunate, since
+               // it means dither can take us out of the clamped range again.
+               // However, since DitherEffect never adds enough dither to change
+               // the quantized levels, we will be fine in practice.
+               ycbcr_a.rgb = clamp(ycbcr_a.rgb, PREFIX(ycbcr_min), PREFIX(ycbcr_max));
+       }
 
        ycbcr_a.a = rgba.a;