Invert blit UV coords

Author: xCollateral

src/main/resources/assets/vulkanmod/shaders/basic/blit/blit.vsh

@@ -1,7 +1,14 @@
 #version 450
 
 const vec4 pos[] = { vec4(-1, -1, 0, 1),  vec4(3, -1, 0, 1), vec4(-1, 3, 0, 1) };
-const vec2 uv[] = { vec2(0, 1),  vec2(2, 1), vec2(0, -1) };
+
+#define INVERTED_UV
+
+#ifndef INVERTED_UV
+    const vec2 uv[] = { vec2(0, 1),  vec2(2, 1), vec2(0, -1) };
+#else
+    const vec2 uv[] = { vec2(0, 0),  vec2(2, 0), vec2(0, 2) };
+#endif
 
 layout(location = 0) out vec2 outUV;