depth buffer compiles and switched to 3d vertices

resources/shaders/simple_image.vertex

@@ -2,7 +2,7 @@
 // SIMPLE IMAGE : VERTEX SHADER
 
 // These come in from the vertex definition
-layout(location = 0) in vec2 v_position;
+layout(location = 0) in vec3 v_position;
 layout(location = 1) in vec4 color;
 layout(location = 2) in vec2 ti_position;
 
@@ -11,7 +11,7 @@ layout(location = 0) out vec2 img_coords;
 
 void main() {
 
-    gl_Position = vec4(v_position, 0.0, 1.0);
+    gl_Position = vec4(v_position, 1.0);
     img_coords = ti_position;
 }