Vertex Paint: Alpha Support

GSOC 2017 by Darshan Kadu, see: D2859.

This is a partial merge of some of the features from
the soc-2017-vertex_paint branch.

- Alpha painting & drawing.
- 10 new color blending modes.
- Support for vertex select in vertex paint mode.

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/gpu/intern/gpu_buffers.c b/source/blender/gpu/intern/gpu_buffers.c
index 73c4d8a6804..e288c74fee6 100644
--- a/source/blender/gpu/intern/gpu_buffers.c
+++ b/source/blender/gpu/intern/gpu_buffers.c
@@ -82,7 +82,7 @@ static const GPUBufferTypeSettings gpu_buffer_type_settings[] = {
     /* normal */
     {GL_ARRAY_BUFFER, 4}, /* we copy 3 shorts per normal but we add a fourth for alignment */
     /* mcol */
-    {GL_ARRAY_BUFFER, 3},
+    {GL_ARRAY_BUFFER, 4},
     /* uv */
     {GL_ARRAY_BUFFER, 2},
     /* uv for texpaint */
@@ -690,7 +690,7 @@ void GPU_color_setup(DerivedMesh *dm, int colType)
 
 	glEnableClientState(GL_COLOR_ARRAY);
 	glBindBuffer(GL_ARRAY_BUFFER, dm->drawObject->colors->id);
-	glColorPointer(3, GL_UNSIGNED_BYTE, 0, 0);
+	glColorPointer(4, GL_UNSIGNED_BYTE, 0, 0);
 
 	GLStates |= GPU_BUFFER_COLOR_STATE;
 }