Draw Manager: curve support

Draws the curve centerline and editmode verts/handles.

Handle theme colors, and normal display still need adding.

2 files changed, 65 insertions, 0 deletions

diff --git a/source/blender/draw/modes/shaders/edit_curve_overlay_frag.glsl b/source/blender/draw/modes/shaders/edit_curve_overlay_frag.glsl
new file mode 100644
index 00000000000..57e96143c75
--- /dev/null
+++ b/source/blender/draw/modes/shaders/edit_curve_overlay_frag.glsl
@@ -0,0 +1,26 @@
+
+flat in int vertFlag;
+
+#define VERTEX_SELECTED	(1 << 0)
+#define VERTEX_ACTIVE	(1 << 1)
+
+#if __VERSION__ == 120
+  #define FragColor gl_FragColor
+#else
+  out vec4 FragColor;
+#endif
+
+void main()
+{
+	/* TODO: vertex size */
+
+	if ((vertFlag & VERTEX_SELECTED) != 0) {
+		FragColor = colorVertexSelect;
+	}
+	else if ((vertFlag & VERTEX_ACTIVE) != 0) {
+		FragColor = colorEditMeshActive;
+	}
+	else {
+		FragColor = colorVertex;
+	}
+}
diff --git a/source/blender/draw/modes/shaders/edit_curve_overlay_loosevert_vert.glsl b/source/blender/draw/modes/shaders/edit_curve_overlay_loosevert_vert.glsl
new file mode 100644
index 00000000000..1af529e5482
--- /dev/null
+++ b/source/blender/draw/modes/shaders/edit_curve_overlay_loosevert_vert.glsl
@@ -0,0 +1,39 @@
+
+/* Draw Curve Vertices */
+
+uniform mat4 ModelViewProjectionMatrix;
+uniform vec2 viewportSize;
+
+in vec3 pos;
+in int data;
+
+/* these are the same for all vertices
+ * and does not need interpolation */
+flat out int vertFlag;
+flat out int clipCase;
+
+/* See fragment shader */
+noperspective out vec4 eData1;
+flat out vec4 eData2;
+
+/* project to screen space */
+vec2 proj(vec4 pos)
+{
+	return (0.5 * (pos.xy / pos.w) + 0.5) * viewportSize;
+}
+
+void main()
+{
+	clipCase = 0;
+
+	vec4 pPos = ModelViewProjectionMatrix * vec4(pos, 1.0);
+
+	/* only verterx position 0 is used */
+	eData1 = eData2 = vec4(1e10);
+	eData2.zw = proj(pPos);
+
+	vertFlag = data;
+
+	gl_PointSize = sizeEdgeFix;
+	gl_Position = pPos;
+}