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i965: Update the comment about viewport hacks.

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It wasn't clear that this was necessary for EGL, or why.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Kenneth Graunke 2013-09-27 10:13:55 -07:00
parent 832bcc3613
commit a25caad9e4
1 changed files with 7 additions and 1 deletions
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8
src/mesa/drivers/dri/i965/intel_context.c
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@ -373,7 +373,13 @@ intelInitContext(struct brw_context *brw,
int bo_reuse_mode;
struct gl_config visual;
/* Can't rely on invalidate events, fall back to glViewport hack */
/* GLX uses DRI2 invalidate events to handle window resizing.
* Unfortunately, EGL does not - libEGL is written in XCB (not Xlib),
* which doesn't provide a mechanism for snooping the event queues.
*
* So EGL still relies on viewport hacks to handle window resizing.
* This should go away with DRI3000.
*/
if (!driContextPriv->driScreenPriv->dri2.useInvalidate) {
brw->saved_viewport = functions->Viewport;
functions->Viewport = intel_viewport;