Add GL_ANGLE_pack_reverse_row_order to command buffer

Add GL_ANGLE_pack_reverse_row_order to command buffer

Bug=82559
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=112245

[greggman, 2011-11-17 19:56:54]

as for looking it up on the client side, yes, you'll need to call getString and
see. Be aware that base does not exist on the client side since it has to run in
NaCl. strstr(extensions, "GL_ANGLE_PACK_FLIPY") != NULL should work though

http://codereview.chromium.org/8513017/diff/6001/gpu/command_buffer/build_gle...
File gpu/command_buffer/build_gles2_cmd_buffer.py (right):

http://codereview.chromium.org/8513017/diff/6001/gpu/command_buffer/build_gle...
gpu/command_buffer/build_gles2_cmd_buffer.py:549: 'GL_PACK_FLIP_Y_ANGLE',
This should not be here. You should check in gpu/service/feature_info.cc and add
them only if the extension exists.

http://codereview.chromium.org/8513017/diff/6001/gpu/command_buffer/build_gle...
gpu/command_buffer/build_gles2_cmd_buffer.py:942: 'GL_PACK_FLIP_Y_ANGLE',
same as above

[bsalomon, 2011-11-28 14:00:40]

PTAL. The latest patchset determines whether the extension is available on the
client side using glGetString and adds the new pixelstore enum to the validators
dynamically. Also, the extension has landed in ANGLE and was renamed to
GL_ANGLE_pack_reverse_row_order.

http://codereview.chromium.org/8513017/diff/11001/gpu/command_buffer/client/g...
File gpu/command_buffer/client/gles2_implementation.cc (right):

http://codereview.chromium.org/8513017/diff/11001/gpu/command_buffer/client/g...
gpu/command_buffer/client/gles2_implementation.cc:2582:
angle_pack_reverse_row_order_status = kUnknownExtensionStatus;
I wasn't too sure about this.

[greggman, 2011-11-29 21:32:27]

lgtm

http://codereview.chromium.org/8513017/diff/18001/gpu/command_buffer/service/...
File gpu/command_buffer/service/gles2_cmd_decoder.cc (right):

http://codereview.chromium.org/8513017/diff/18001/gpu/command_buffer/service/...
gpu/command_buffer/service/gles2_cmd_decoder.cc:5719: if
(GL_PACK_REVERSE_ROW_ORDER_ANGLE != pname &&
this might be more future proof as a switch?