Added documentation for GL_CHROMIUM_texture_mailbox GL extension.

Added documentation for GL_CHROMIUM_texture_mailbox GL extension.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=134847

[Ken Russell (switch to Gerrit), 2012-04-26 00:37:19]

lgtm

https://chromiumcodereview.appspot.com/10222015/diff/1/gpu/GLES2/extensions/C...
File gpu/GLES2/extensions/CHROMIUM/CHROMIUM_texture_mailbox.txt (right):

https://chromiumcodereview.appspot.com/10222015/diff/1/gpu/GLES2/extensions/C...
gpu/GLES2/extensions/CHROMIUM/CHROMIUM_texture_mailbox.txt:26: 
Should it be mentioned that there may be implementation-dependent restrictions
on which two contexts may reference the same mailbox? In our case, the contexts
have to be in the same renderer, which would be the same as having them in the
same process.

If you think this is implicit, then ignore this comment and the one at the
bottom about another possible error.

https://chromiumcodereview.appspot.com/10222015/diff/1/gpu/GLES2/extensions/C...
gpu/GLES2/extensions/CHROMIUM/CHROMIUM_texture_mailbox.txt:71: INVALID_OPERATION
is generated if <mailbox> is emopty.
typo: empty

https://chromiumcodereview.appspot.com/10222015/diff/1/gpu/GLES2/extensions/C...
gpu/GLES2/extensions/CHROMIUM/CHROMIUM_texture_mailbox.txt:78: context.
Any error if the mailbox isn't referenceable from this context? See above.

[apatrick_chromium, 2012-04-26 21:18:04]

Updated to match new semantics.

[Ken Russell (switch to Gerrit), 2012-04-26 21:26:33]

lgtm

[Ken Russell (switch to Gerrit), 2012-04-26 22:18:09]

https://chromiumcodereview.appspot.com/10222015/diff/6001/gpu/GLES2/extension...
File gpu/GLES2/extensions/CHROMIUM/CHROMIUM_texture_mailbox.txt (right):

https://chromiumcodereview.appspot.com/10222015/diff/6001/gpu/GLES2/extension...
gpu/GLES2/extensions/CHROMIUM/CHROMIUM_texture_mailbox.txt:62: INVALID_OPERATION
is generated if <mailbox> is invalid.
Upon further thought: what happens to the texture bound to this target in this
case?

[apatrick_chromium, 2012-05-01 19:50:35]

Clarified and updated mailbox size to 64-bytes.

[Ken Russell (switch to Gerrit), 2012-05-01 23:42:38]

LGTM again.

[commit-bot: I haz the power, 2012-05-01 23:50:43]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/apatrick@chromium.org/10222015/13002

[commit-bot: I haz the power, 2012-05-02 01:24:11]

Change committed as 134847