Allow symlinked frame files. Useful for testing.

[nageru] / blend.frag

diff --git a/blend.frag b/blend.frag
index 154538ea9baa049d6b2c76635b05b079f31fef63..eb3fc80753fa0ddec596b8c2fc1a686cd7973b61 100644 (file)
--- a/blend.frag
+++ b/blend.frag
@@ -1,35 +1,49 @@
 #version 450 core
 
-in vec2 tc;
+in vec3 tc;
+
+#ifdef SPLIT_YCBCR_OUTPUT
+out float Y;
+out vec2 CbCr;
+#else
 out vec4 rgba;
+#endif
 
-uniform sampler2D image0_tex, image1_tex, flow_tex;
-uniform float alpha, flow_consistency_tolerance;
+uniform sampler2DArray image_tex;
+uniform sampler2D flow_tex;
+uniform float alpha;
 
 void main()
 {
-       vec2 flow = texture(flow_tex, tc).xy;
-       vec4 I_0 = texture(image0_tex, tc - alpha * flow);
-       vec4 I_1 = texture(image1_tex, tc + (1.0f - alpha) * flow);
+       vec2 flow = texture(flow_tex, tc.xy).xy;
+       vec4 I_0 = texture(image_tex, vec3(tc.xy - alpha * flow, 0));
+       vec4 I_1 = texture(image_tex, vec3(tc.xy + (1.0f - alpha) * flow, 1));
 
        // Occlusion reasoning:
 
-       vec2 size = textureSize(image0_tex, 0);
+       vec2 size = textureSize(image_tex, 0).xy;
 
        // Follow the flow back to the initial point (where we sample I_0 from), then forward again.
        // See how well we match the point we started at, which is out flow consistency.
-       float d0 = alpha * length(size * (texture(flow_tex, tc - alpha * flow).xy - flow));
+       float d0 = alpha * length(size * (texture(flow_tex, vec2(tc.xy - alpha * flow)).xy - flow));
 
        // Same for d1.
-       float d1 = (1.0f - alpha) * length(size * (texture(flow_tex, tc + (1.0f - alpha) * flow).xy - flow));
+       float d1 = (1.0f - alpha) * length(size * (texture(flow_tex, vec2(tc.xy + (1.0f - alpha) * flow)).xy - flow));
 
+       vec4 result;
        if (max(d0, d1) < 3.0f) {  // Arbitrary constant, not all that tuned. The UW paper says 1.0 is fine for ground truth.
                // Both are visible, so blend.
-               rgba = I_0 + alpha * (I_1 - I_0);
+               result = I_0 + alpha * (I_1 - I_0);
        } else if (d0 < d1) {
-               rgba = I_0;
+               result = I_0;
        } else {
-               rgba = I_1;
+               result = I_1;
        }
 
+#ifdef SPLIT_YCBCR_OUTPUT
+       Y = result.r;
+       CbCr = result.gb;
+#else
+       rgba = result;
+#endif
 }