X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=ycbcr_input.frag;h=170e412314ebeb9e5434bcce3d78f8d25db42f4f;hp=bd6ff766569730287af70152ef58dc679ef9d867;hb=919101c59390dbbe380af7cc77102819e515a632;hpb=61e2a7671f7b22227dcdc34dd303ae4fcc802aaa

diff --git a/ycbcr_input.frag b/ycbcr_input.frag
index bd6ff76..170e412 100644
--- a/ycbcr_input.frag
+++ b/ycbcr_input.frag
@@ -1,6 +1,12 @@
-uniform sampler2D PREFIX(tex_y);
-uniform sampler2D PREFIX(tex_cb);
-uniform sampler2D PREFIX(tex_cr);
+// Implicit uniforms:
+// uniform sampler2D PREFIX(tex_y);
+// uniform sampler2D PREFIX(tex_cbcr);  // If CB_CR_SAME_TEXTURE.
+// uniform sampler2D PREFIX(tex_cb);    // If not CB_CR_SAME_TEXTURE.
+// uniform sampler2D PREFIX(tex_cr);    // If not CB_CR_SAME_TEXTURE.
+// uniform mat3 PREFIX(ycbcr_matrix);
+// uniform vec3 PREFIX(offset);
+// uniform vec2 PREFIX(cb_offset);
+// uniform vec2 PREFIX(cr_offset);
 
 vec4 FUNCNAME(vec2 tc) {
 	// OpenGL's origin is bottom-left, but most graphics software assumes
@@ -9,9 +15,22 @@ vec4 FUNCNAME(vec2 tc) {
 	tc.y = 1.0 - tc.y;
 
 	vec3 ycbcr;
+#if Y_CB_CR_SAME_TEXTURE
+	ycbcr = tex2D(PREFIX(tex_y), tc).xyz;
+#else
 	ycbcr.x = tex2D(PREFIX(tex_y), tc).x;
+  #if CB_CR_SAME_TEXTURE
+    #if CB_CR_OFFSETS_EQUAL
+	ycbcr.yz = tex2D(PREFIX(tex_cbcr), tc + PREFIX(cb_offset)).xy;
+    #else
+	ycbcr.y = tex2D(PREFIX(tex_cbcr), tc + PREFIX(cb_offset)).x;
+	ycbcr.z = tex2D(PREFIX(tex_cbcr), tc + PREFIX(cr_offset)).x;
+    #endif
+  #else
 	ycbcr.y = tex2D(PREFIX(tex_cb), tc + PREFIX(cb_offset)).x;
 	ycbcr.z = tex2D(PREFIX(tex_cr), tc + PREFIX(cr_offset)).x;
+  #endif
+#endif
 
 	ycbcr -= PREFIX(offset);