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Fix T52800: fix UI flickering with Mesa on Linux. 

Use triple buffer by default now on all platforms, remaing ones where:
* Mesa: seems to have been working well for a long time now, and not using
  it gives issues with the latest Mesa 17.2.0.
* Windows software OpenGL: no longer supported since OpenGL 2.1 requirement
  was introduced.
* OS X with thousands of colors: this option was removed in OS X 10.6, and
  that's our minimum requirement.
This commit is contained in:
Brecht Van Lommel 2017-09-18 13:12:36 +02:00 committed by Bastien Montagne
parent 30f53d56b6
commit c85a305c09
1 changed files with 4 additions and 16 deletions
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20
source/blender/windowmanager/intern/wm_draw.c
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@ -867,25 +867,13 @@ static bool wm_draw_update_test_window(wmWindow *win)
static int wm_automatic_draw_method(wmWindow *win)
{
/* Ideally all cards would work well with triple buffer, since if it works
* well gives the least redraws and is considerably faster at partial redraw
* for sculpting or drawing overlapping menus. For typically lower end cards
* copy to texture is slow though and so we use overlap instead there. */
/* We assume all supported GPUs now support triple buffer well. */
if (win->drawmethod == USER_DRAW_AUTOMATIC) {
/* Windows software driver darkens color on each redraw */
if (GPU_type_matches(GPU_DEVICE_SOFTWARE, GPU_OS_WIN, GPU_DRIVER_SOFTWARE))
return USER_DRAW_OVERLAP_FLIP;
else if (GPU_type_matches(GPU_DEVICE_SOFTWARE, GPU_OS_UNIX, GPU_DRIVER_SOFTWARE))
return USER_DRAW_OVERLAP;
/* drawing lower color depth again degrades colors each time */
else if (GPU_color_depth() < 24)
return USER_DRAW_OVERLAP;
else
return USER_DRAW_TRIPLE;
return USER_DRAW_TRIPLE;
}
else
else {
return win->drawmethod;
}
}
bool WM_is_draw_triple(wmWindow *win)