docs: README update

default/frag1.glsl

@@ -8,7 +8,7 @@
 in vec2 vUV;
 out vec4 fragColor;
 
-#include inc_yuv.glsl
+#include inc_yuyv.glsl
 
 uniform sampler2D iTex0;
 uniform sampler2D iTex1;
@@ -18,6 +18,8 @@ uniform vec2 iInputResolution1;
 void main() {
     if (iInputFormat1 == YUYV_FOURCC) {
         fragColor = yuyvTex(iTex1, vUV, int(iInputResolution1.x));
+    } else if (iInputResolution1.x > 0) {
+        fragColor = texture(iTex1, vUV);
     } else {
         fragColor = texture(iTex0, vUV);
     }

default/frag2.glsl

@@ -8,7 +8,7 @@
 in vec2 vUV;
 out vec4 fragColor;
 
-#include inc_yuv.glsl
+#include inc_yuyv.glsl
 
 uniform sampler2D iTex0;
 uniform sampler2D iTex2;
@@ -18,6 +18,8 @@ uniform vec2 iInputResolution2;
 void main() {
     if (iInputFormat2 == YUYV_FOURCC) {
         fragColor = yuyvTex(iTex2, vUV, int(iInputResolution2.x));
+    } else if (iInputResolution2.x > 0) {
+        fragColor = texture(iTex2, vUV);
     } else {
         fragColor = texture(iTex0, vUV);
     }

default/inc_debug.glsl

@@ -1,6 +1,6 @@
 #include inc_magic.glsl
 #include inc_functions.glsl
-#include inc_yuv.glsl
+#include inc_yuyv.glsl
 #include inc_cp437.glsl
 
 #ifndef INC_DEBUG

default/inc_yuyv.glsl

@@ -1,9 +1,9 @@
-#ifndef INC_YUV
-#define INC_YUV
+#ifndef INC_YUYV
+#define INC_YUYV
 
 const int YUYV_FOURCC = 1448695129;
 
-const mat3x3 yuv_to_rgb = {{1,1,1},{0,-0.39465,2.03211},{1.13983,-0.5806,0}};
+const mat3x3 yuyv_to_rgb = {{1,1,1},{0,-0.39465,2.03211},{1.13983,-0.5806,0}};
 
 vec4 yuyvTex(sampler2D tex, vec2 vUV, int base_width) {
     float w = base_width - 1;
@@ -22,7 +22,7 @@ vec4 yuyvTex(sampler2D tex, vec2 vUV, int base_width) {
         tV.y - 0.5
     );
 
-    return vec4(yuv_to_rgb * yuv, 1.0);
+    return vec4(yuyv_to_rgb * yuv, 1.0);
 }
 
 #endif