Packed font rendering

source/shaders/spritevert.glsl

@@ -12,5 +12,6 @@ uniform mat4 model;
 void main()
 {
     texcoords = vertex.xy;
+    texcoords.y *= -1;
     gl_Position = projection * model * vec4(vertex.xy, 0.0, 1.0);
 }

source/shaders/textvert.glsl

@@ -10,5 +10,5 @@ layout (std140) uniform Projection
 void main()
 {
     gl_Position = projection * vec4(vertex.xy, 0.0, 1.0);
-    TexCoords = vec2(vertex.z, 1.0 - vertex.w);
+    TexCoords = vertex.zw;
 }