Curve Edit: Cleanup/Improve/Fix handles drawing

Now handles are drawn using index buffer instead of duplicating memory
requirement.

Also make use of shader tricks to draw handles antialiased, and respond to
UI scalling.

Make vertex point match edit mesh vertex size.

1 files changed, 15 insertions, 0 deletions

diff --git a/source/blender/draw/modes/shaders/edit_curve_overlay_handle_vert.glsl b/source/blender/draw/modes/shaders/edit_curve_overlay_handle_vert.glsl
new file mode 100644
index 00000000000..d3f9deedf0c
--- /dev/null
+++ b/source/blender/draw/modes/shaders/edit_curve_overlay_handle_vert.glsl
@@ -0,0 +1,15 @@
+
+/* Draw Curve Handles */
+
+uniform mat4 ModelViewProjectionMatrix;
+
+in vec3 pos;
+in int data;
+
+flat out int vertFlag;
+
+void main()
+{
+	gl_Position = ModelViewProjectionMatrix * vec4(pos, 1.0);
+	vertFlag = data;
+}