X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=ycbcr_input.frag;h=170e412314ebeb9e5434bcce3d78f8d25db42f4f;hp=13e44b071398b986bb2a9037f27fed2016a65645;hb=8e9f58fec54a4c879035b214fd7411f6ff7b3a32;hpb=9dcbd93164611ea111cc29519c18193d4f571ac1

diff --git a/ycbcr_input.frag b/ycbcr_input.frag
index 13e44b0..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
@@ -9,12 +15,24 @@ vec4 FUNCNAME(vec2 tc) {
 	tc.y = 1.0 - tc.y;
 
 	vec3 ycbcr;
-	ycbcr.x = texture2D(PREFIX(tex_y), tc).x;
-	ycbcr.y = texture2D(PREFIX(tex_cb), tc + PREFIX(chroma_offset)).x;
-	ycbcr.z = texture2D(PREFIX(tex_cr), tc + PREFIX(chroma_offset)).x;
+#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);
-	ycbcr *= PREFIX(scale);
 
 	vec4 rgba;
 	rgba.rgb = PREFIX(inv_ycbcr_matrix) * ycbcr;