SirVer has proposed merging lp:~widelands-dev/widelands/font_rendering_bug into
lp:widelands.
Commit message:
Flush pipeline before switching bound framebuffer to work around buggy OpenGL
implementations.
Requested reviews:
Widelands Developers (widelands-dev)
Related bugs:
Bug #1535732 in widelands: "Texts not displayed correctly with the new font
renderer"
https://bugs.launchpad.net/widelands/+bug/1535732
For more details, see:
https://code.launchpad.net/~widelands-dev/widelands/font_rendering_bug/+merge/304975
--
Your team Widelands Developers is requested to review the proposed merge of
lp:~widelands-dev/widelands/font_rendering_bug into lp:widelands.
=== modified file 'src/graphic/gl/utils.cc'
--- src/graphic/gl/utils.cc 2016-08-04 15:49:05 +0000
+++ src/graphic/gl/utils.cc 2016-09-06 08:04:16 +0000
@@ -220,6 +220,11 @@
return;
}
+ // Some graphic drivers inaccurately do not flush their pipeline when
+ // switching the framebuffer - and happily do draw calls into the wrong
+ // framebuffers. I AM LOOKING AT YOU, INTEL!!!
+ glFlush();
+
glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
if (framebuffer != 0) {
unbind_texture_if_bound(texture);
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