stuff

shaders/ImageBox.vert

@@ -11,6 +11,10 @@ uniform vec2 pixelScale;
 uniform float z;
 uniform float rotation;
 
+uniform int uvMode = 0;                // 0 = stretch, 1 = tile
+uniform vec3 tileScale = vec3(1.0);
+uniform vec2 uvOffset = vec2(0.0);
+
 void main()
 {
     vec2 unitPos = aPos * 0.5 + 0.5;
@@ -20,5 +24,7 @@ void main()
 
     gl_Position = vec4(ndc, 0.0f, 1.0f);
 
-    TexCoords = aTexCoords;
+    // Screen y runs down here, so flip v to keep images the right way up
+    vec2 uv = vec2(aTexCoords.x, 1.0 - aTexCoords.y);
+    TexCoords = (uvMode == 1 ? uv * tileScale.xy : uv) + uvOffset;
 }