gpu: [compute] move material clip space transformation to the GPU

Signed-off-by: Elias Naur <mail@eliasnaur.com>

gpu/shaders/material.vert

@@ -4,6 +4,11 @@
 
 precision highp float;
 
+layout(binding = 0) uniform Block {
+	vec2 scale;
+	vec2 pos;
+} _block;
+
 layout(location = 0) in vec2 pos;
 layout(location = 1) in vec2 uv;
 
@@ -11,5 +16,5 @@ layout(location = 0) out vec2 vUV;
 
 void main() {
 	vUV = uv;
-	gl_Position = vec4(pos, 0, 1);
+	gl_Position = vec4(pos*_block.scale + _block.pos, 0, 1);
 }