From: Ian Romanick <ian.d.roman...@intel.com> Previously only the 32-bit X visual would match the 32-bit RGBA8888 configs. This resulted in every config with alpha getting the "magic" visual whose alpha is used by the compositor. This also resulted in no multisample visuals being advertised. How many ways could we lose?
This patch inverts the problem... now you can't get the visual with alpha used by the compositor even if you want it. I think we need to invent a new value for EGL_TRANSPARENT_TYPE that apps can use to get this. I'm surprised that there isn't already a choice for EGL_TRANSPARENT_ALPHA. Signed-off-by: Ian Romanick <ian.d.roman...@intel.com> Tested-by: Tian Ye <yex.t...@intel.com> Cc: Kristian Høgsberg <k...@bitplanet.net> Cc: Chad Versace <chad.vers...@linux.intel.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59783 --- src/egl/drivers/dri2/egl_dri2.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c index ae842d7..5d00e4f 100644 --- a/src/egl/drivers/dri2/egl_dri2.c +++ b/src/egl/drivers/dri2/egl_dri2.c @@ -195,7 +195,14 @@ dri2_add_config(_EGLDisplay *disp, const __DRIconfig *dri_config, int id, for (i = 0; attr_list[i] != EGL_NONE; i += 2) _eglSetConfigKey(&base, attr_list[i], attr_list[i+1]); - if (depth > 0 && depth != base.BufferSize) + /* Allow a 24-bit RGB visual to match a 32-bit RGBA fbconfig. Otherwise it + * will only match a 32-bit RGBA visual. On a composited window manager on + * X11, this will make all of the fbconfigs with destination alpha get + * blended by the compositor. This is probably not what the application + * wants... especially on drivers that only have 32-bit RGBA fbconfigs! + */ + if (depth > 0 && + !(depth == base.BufferSize || (depth == 24 && base.BufferSize == 32))) return NULL; if (rgba_masks && memcmp(rgba_masks, dri_masks, sizeof(dri_masks))) -- 1.7.11.7 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
