OpenGL: fixes related to GL_POINTS

I put all usage of GL_POINTS under the microscope. Fixed problems &
optimized a couple of spots.

- reduce calls to glPointSize by about 50%
- draw selected & unselected vertices together for UV editor & EditMesh
- draw initial gpencil stroke point the proper size
- a few other smaller fixes

New policy: each GL_POINTS draw call needs to set its desired point
size. This eliminates half our calls to glPointSize (setting it back to
its 1.0 default after every draw).

1 files changed, 2 insertions, 3 deletions

diff --git a/source/blender/editors/gpencil/drawgpencil.c b/source/blender/editors/gpencil/drawgpencil.c
index f207c71474c..d5c7c523ca8 100644
--- a/source/blender/editors/gpencil/drawgpencil.c
+++ b/source/blender/editors/gpencil/drawgpencil.c
@@ -105,9 +105,9 @@ static void gp_draw_stroke_buffer(tGPspoint *points, int totpoints, short thickn
 	if (dflag & (GP_DRAWDATA_ONLY3D | GP_DRAWDATA_ONLYV2D))
 		return;
 	
-	/* if drawing a single point, draw it larger */
 	if (totpoints == 1) {
-		/* draw point */
+		/* if drawing a single point, draw it larger */
+		glPointSize((float)(thickness + 2) * points->pressure);
 		glBegin(GL_POINTS);
 		glVertex2iv(&points->x);
 		glEnd();
@@ -1123,7 +1123,6 @@ static void gp_draw_data(bGPdata *gpd, int offsx, int offsy, int winx, int winy,
 	
 	/* restore initial gl conditions */
 	glLineWidth(1.0);
-	glPointSize(1.0);
 	glColor4f(0, 0, 0, 1);
 }