border radius for quads

shaders/ui.vert

@@ -1,11 +1,11 @@
 #version 330 core
-layout (location = 0) in vec3 aPos;
-layout (location = 1) in vec2 aTexCoords;
-out vec2 texCoords;
+layout (location = 0) in vec4 vertex;
 
+out vec2 v_TexCoords;
 uniform mat4 projection;
+uniform mat4 model;
 
 void main() {
-  gl_Position = projection * vec4(aPos, 1.0f);
-  texCoords = aTexCoords;
+  gl_Position = projection * model * vec4(vertex.xy, 0.0, 1.0);
+  v_TexCoords = vertex.zw;
 }