[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [53609] trunk/blender/source/blender/ editors/space_view3d/view3d_draw.c: Slight modification of viewport sky: Avoid clearing the colour buffer

[Antony Riakiotakis]

Revision: 53609
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=53609
Author:   psy-fi
Date:     2013-01-06 17:06:13 +0000 (Sun, 06 Jan 2013)
Log Message:
-----------
Slight modification of viewport sky: Avoid clearing the colour buffer
since we fill it later anyway. Usually OpenGL does color + depth buffer
concurrently so this probably won't have any noticable effect. Still
better be pedantic about it in case we do earn some performance out of
it. Added alpha component in sky color to make sure it is set to zero in
the framebuffer too.

Modified Paths:
--------------
    trunk/blender/source/blender/editors/space_view3d/view3d_draw.c

Modified: trunk/blender/source/blender/editors/space_view3d/view3d_draw.c
===================================================================
--- trunk/blender/source/blender/editors/space_view3d/view3d_draw.c	2013-01-06 16:45:10 UTC (rev 53608)
+++ trunk/blender/source/blender/editors/space_view3d/view3d_draw.c	2013-01-06 17:06:13 UTC (rev 53609)
@@ -3000,7 +3000,7 @@
 #define XTOT 16
 #define YTOT 16
 
-			GLubyte grid_col[XTOT][YTOT][3];
+			GLubyte grid_col[XTOT][YTOT][4];
 			float   grid_pos[XTOT][YTOT][2];
 
 			IMB_colormanagement_pixel_to_display_space_v3(col_hor, &scene->world->horr, &scene->view_settings,
@@ -3008,8 +3008,7 @@
 			IMB_colormanagement_pixel_to_display_space_v3(col_zen, &scene->world->zenr, &scene->view_settings,
 			                                              &scene->display_settings);
 
-			glClearColor(col_hor[0], col_hor[1], col_hor[2], 0.0);
-			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+			glClear(GL_DEPTH_BUFFER_BIT);
 
 			glMatrixMode(GL_PROJECTION);
 			glPushMatrix();
@@ -3058,19 +3057,20 @@
 					interp_v3_v3v3(col_fl, col_hor, col_zen, col_fac);
 
 					rgb_float_to_uchar(col_ub, col_fl);
+					col_ub[3] = 0;
 				}
 			}
 
 			glBegin(GL_QUADS);
 			for (x = 0; x < XTOT - 1; x++) {
 				for (y = 0; y < YTOT - 1; y++) {
-					glColor3ubv(grid_col[x][y]);
+					glColor4ubv(grid_col[x][y]);
 					glVertex2fv(grid_pos[x][y]);
-					glColor3ubv(grid_col[x][y + 1]);
+					glColor4ubv(grid_col[x][y + 1]);
 					glVertex2fv(grid_pos[x][y + 1]);
-					glColor3ubv(grid_col[x + 1][y + 1]);
+					glColor4ubv(grid_col[x + 1][y + 1]);
 					glVertex2fv(grid_pos[x + 1][y + 1]);
-					glColor3ubv(grid_col[x + 1][y]);
+					glColor4ubv(grid_col[x + 1][y]);
 					glVertex2fv(grid_pos[x + 1][y]);
 				}
 			}