round and bevel hairline rects show the same as miter hairline rects

round and bevel hairline rects show the same as miter hairline rects

So round and bevel hairline rects can generate the vertices and indices the same as miter rects do. The original code behaves the same as bevel rects for round and bevel hairline rects.

This small CL can save (vertices and indices) buffer memory as well as improve performance (draw less triangles).

gm cases show no difference after this CL is applied.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/2bff230d835fbc84f0ce8b2e7a399fe8416ec7c8

[yunchao, 2014-07-25 08:12:39]

PTAL, thanks.

[robertphillips, 2014-07-28 19:31:30]

lgtm + comment suggestion

https://codereview.chromium.org/417113002/diff/20001/src/gpu/GrAARectRenderer...
File src/gpu/GrAARectRenderer.cpp (right):

https://codereview.chromium.org/417113002/diff/20001/src/gpu/GrAARectRenderer...
src/gpu/GrAARectRenderer.cpp:765: bool miterStroke = true;
I think you comment might be better stated as:

// For hairlines, make bevel and round joins appear the same as mitered ones.

[yunchao, 2014-07-29 02:07:35]

The CQ bit was checked by yunchao.he@intel.com

[commit-bot: I haz the power, 2014-07-29 02:07:59]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/yunchao.he@intel.com/417113002/40001

[commit-bot: I haz the power, 2014-07-29 02:18:55]

Change committed as 2bff230d835fbc84f0ce8b2e7a399fe8416ec7c8