Revert "Revert 210138 "Perform glReadPixels with PBOs in the gpu, if PBO...""
Third try for getting asynchrous readpixels to work everywhere.
This is identical to: https://codereview.chromium.org/16831004/, but with the following fixes:
OutOfProcessPPAPITests.Graphics3D (removed a check in query_tracker.cc)
GLReadbackTest.ReadPixelsWithPBO (removed, no longer a valid test)
GLReadbackTest.ReadPixelsWithPBOAndQuery (now uses the correct query)
And, new in this CL:
Disable asynchronous readpixels on macosx prior to 10.8, as it would seem
that the GL_ARB_fence extension doesn't seem to work on any driver, and
there are crashes in readpixel itself on intel drivers. The original
CL only disabled the async readpixels path for intel drivers.
BUG=258169
Review URL: https://chromiumcodereview.appspot.com/19579008
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@213261 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ui/gl/gl_bindings.h b/ui/gl/gl_bindings.h
index 85fdbfb..c6a1eac 100644
--- a/ui/gl/gl_bindings.h
+++ b/ui/gl/gl_bindings.h
@@ -124,6 +124,7 @@
/* GL_CHROMIUM_async_pixel_transfers */
#define GL_ASYNC_PIXEL_TRANSFERS_COMPLETED_CHROMIUM 0x84F5
+#define GL_ASYNC_READ_PIXELS_COMPLETED_CHROMIUM 0x84F6
// GL_OES_texure_3D
#define GL_SAMPLER_3D_OES 0x8B5F
