Remove C++11 dependency from ResampleEffect.

[movit] / footer.frag

diff --git a/footer.frag b/footer.frag
index 0a742a331301b725104162a9b739c48a829b65f1..8a55b01bbaa373a3a9d20d27d98ef2c80fcf1b0a 100644 (file)
--- a/footer.frag
+++ b/footer.frag
@@ -1,4 +1,94 @@
+// GLSL is pickier than the C++ preprocessor in if-testing for undefined
+// tokens; do some fixups here to keep it happy.
+
+#ifndef YCBCR_OUTPUT_PLANAR
+#define YCBCR_OUTPUT_PLANAR 0
+#endif
+
+#ifndef YCBCR_OUTPUT_SPLIT_Y_AND_CBCR
+#define YCBCR_OUTPUT_SPLIT_Y_AND_CBCR 0
+#endif
+
+#ifndef SECOND_YCBCR_OUTPUT_PLANAR
+#define SECOND_YCBCR_OUTPUT_PLANAR 0
+#endif
+
+#ifndef SECOND_YCBCR_OUTPUT_SPLIT_Y_AND_CBCR
+#define SECOND_YCBCR_OUTPUT_SPLIT_Y_AND_CBCR 0
+#endif
+
+#ifndef SECOND_YCBCR_OUTPUT_INTERLEAVED
+#define SECOND_YCBCR_OUTPUT_INTERLEAVED 0
+#endif
+
+#ifndef YCBCR_ALSO_OUTPUT_RGBA
+#define YCBCR_ALSO_OUTPUT_RGBA 0
+#endif
+
+#ifndef SQUARE_ROOT_TRANSFORMATION
+#define SQUARE_ROOT_TRANSFORMATION 0
+#endif
+
+#if YCBCR_OUTPUT_PLANAR
+out vec4 Y, Cb, Cr;
+#elif YCBCR_OUTPUT_SPLIT_Y_AND_CBCR
+out vec4 Y, Chroma;
+#else
+out vec4 FragColor;  // Y'CbCr or RGBA.
+#endif
+
+#if SECOND_YCBCR_OUTPUT_PLANAR
+out vec4 Y2, Cb2, Cr2;
+#elif SECOND_YCBCR_OUTPUT_SPLIT_Y_AND_CBCR
+out vec4 Y2, Chroma2;
+#elif SECOND_YCBCR_OUTPUT_INTERLEAVED
+out vec4 YCbCr2;
+#endif
+
+#if YCBCR_ALSO_OUTPUT_RGBA
+out vec4 RGBA;
+#endif
+
 void main()
 {
-       gl_FragColor = LAST_INPUT(tc);
+#if YCBCR_ALSO_OUTPUT_RGBA
+       vec4 color[2] = INPUT(tc);
+       vec4 color0 = color[0];
+       vec4 color1 = color[1];
+#else
+       vec4 color0 = INPUT(tc);
+#endif
+
+#if SQUARE_ROOT_TRANSFORMATION
+       // Make sure we don't give negative values to sqrt.
+       color0.rgb = sqrt(max(color0.rgb, 0.0));
+#endif
+
+#if YCBCR_OUTPUT_PLANAR
+       Y = color0.rrra;
+       Cb = color0.ggga;
+       Cr = color0.bbba;
+#elif YCBCR_OUTPUT_SPLIT_Y_AND_CBCR
+       Y = color0.rrra;
+       Chroma = color0.gbba;
+#else
+       FragColor = color0;
+#endif
+
+       // Exactly the same, just with other outputs.
+       // (GLSL does not allow arrays of outputs.)
+#if SECOND_YCBCR_OUTPUT_PLANAR
+       Y2 = color0.rrra;
+       Cb2 = color0.ggga;
+       Cr2 = color0.bbba;
+#elif SECOND_YCBCR_OUTPUT_SPLIT_Y_AND_CBCR
+       Y2 = color0.rrra;
+       Chroma2 = color0.gbba;
+#elif SECOND_YCBCR_OUTPUT_INTERLEAVED
+       YCbCr2 = color0;
+#endif
+
+#if YCBCR_ALSO_OUTPUT_RGBA
+       RGBA = color1;
+#endif
 }