1 files changed, 21 insertions, 0 deletions
diff --git a/source/blender/draw/engines/overlay/shaders/image_vert.glsl b/source/blender/draw/engines/overlay/shaders/image_vert.glsl
new file mode 100644
index 00000000000..621e1d8068b
--- /dev/null
+++ b/source/blender/draw/engines/overlay/shaders/image_vert.glsl
@@ -0,0 +1,21 @@
+
+uniform bool depthSet;
+
+in vec3 pos;
+
+out vec2 uvs;
+
+void main()
+{
+  vec3 world_pos = point_object_to_world(pos);
+  gl_Position = point_world_to_ndc(world_pos);
+
+  if (depthSet) {
+    /* Result in a position at 1.0 (far plane). Small epsilon to avoid precision issue.
+     * This mimics the effect of infinite projection matrix
+     * (see http://www.terathon.com/gdc07_lengyel.pdf). */
+    gl_Position.z = gl_Position.w - 2.4e-7;
+  }
+
+  uvs = pos.xy * 0.5 + 0.5;
+}