Use stream usage for dynamic vertex data.

Use stream usage for dynamic vertex data.

R=robertphillips@google.com
Committed: https://code.google.com/p/skia/source/detail?r=8129

[bsalomon, 2013-03-13 13:40:40]

Use stream usage for dynamic vertex data.

R=robertphillips@google.com

[bsalomon, 2013-03-13 13:41:07]

This will trigger the fast path for Mali and SGX in Chromium

[robertphillips, 2013-03-13 15:20:54]

LGTM

https://codereview.chromium.org/12799005/diff/3001/src/gpu/gl/GrGLBufferImpl.cpp
File src/gpu/gl/GrGLBufferImpl.cpp (right):

https://codereview.chromium.org/12799005/diff/3001/src/gpu/gl/GrGLBufferImpl....
src/gpu/gl/GrGLBufferImpl.cpp:18: 
GR_?
Comment as to why we even have this #define?

[bsalomon, 2013-03-13 15:29:22]

https://codereview.chromium.org/12799005/diff/3001/src/gpu/gl/GrGLBufferImpl.cpp
File src/gpu/gl/GrGLBufferImpl.cpp (right):

https://codereview.chromium.org/12799005/diff/3001/src/gpu/gl/GrGLBufferImpl....
src/gpu/gl/GrGLBufferImpl.cpp:18: 
On 2013/03/13 15:20:54, robertphillips wrote:
> GR_?

It's not exposed outside this cpp so I don't think it needs a prefix.

> Comment as to why we even have this #define?
Will add:
// GL_STREAM_DRAW triggers an optimization in Chromium's GPU 
// process where a client's vertex objects are implemented 
// as client-side-arrays on tile-deferred architectures.

[bsalomon, 2013-03-13 15:31:13]

Committed patchset #2 manually as r8129 (presubmit successful).