Use vertexless shaders when NVpr is available

Use vertexless shaders when NVpr is available

Adds support for vertexless shaders and enables them when
NV_path_rendering is available. This takes a
GrGLFragmentOnlyShaderBuilder class, a GrGLTexGenEffectArray class,
support for setting TexGen and the projection matrix in GrGpuGL, and
code for setting the GL fixed function state where necessary.

Committed: http://code.google.com/p/skia/source/detail?r=11620

[bsalomon, 2013-10-03 15:40:19]

On 2013/10/03 07:57:23, Chris Dalton wrote:

lgtm

[Kimmo Kinnunen, 2013-10-04 11:02:32]

https://chromiumcodereview.appspot.com/25846002/diff/15001/src/gpu/gl/GrGLPro...
File src/gpu/gl/GrGLProgramEffects.h (right):

https://chromiumcodereview.appspot.com/25846002/diff/15001/src/gpu/gl/GrGLPro...
src/gpu/gl/GrGLProgramEffects.h:175: , fFirstTexCoordIdx(0)
This variable is never set in release mode. Causes crashes.

[Chris Dalton, 2013-10-04 19:09:03]

Yikes, good catch Kimmo.

This fixes it. I simplified the TexGen stuff.

While I was at it, I also redid the GrGLProgramEffects to build themselves in
private methods called by the builders (rather than the builders building them
directly). I felt that was cleaner.

[bsalomon, 2013-10-04 19:33:01]

On 2013/10/04 19:09:03, Chris Dalton wrote:
> Yikes, good catch Kimmo.
> 
> This fixes it. I simplified the TexGen stuff.
> 
> While I was at it, I also redid the GrGLProgramEffects to build themselves in
> private methods called by the builders (rather than the builders building them
> directly). I felt that was cleaner.

I like that... lgtm.

[commit-bot: I haz the power, 2013-10-04 19:33:12]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/cdalton@nvidia.com/25846002/20001

[commit-bot: I haz the power, 2013-10-04 19:38:18]

Retried try job too often on Build-Mac10.7-Clang-x86-Release-Trybot for step(s)
BuildSkiaLib
http://skiabot-master.pogerlabs.com:10117/buildstatus?builder=Build-Mac10.7-C...

[commit-bot: I haz the power, 2013-10-04 19:52:20]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/cdalton@nvidia.com/25846002/33001

[commit-bot: I haz the power, 2013-10-04 20:02:57]

Change committed as 11620