Yunchao He 56b12422da Implement readonly storage buffer on OpenGL backend
Note that storage buffer and readonly storage buffer may not be
supported in vertex shader on OpenGL backend. In OpenGL Spec 4.6,
the minimum value of MAX_VERTEX_SHADER_STORAGE_BLOCKS is 0.

BUG=dawn:180, dawn:284

Change-Id: Ib637a61e4eee0a0996c0da33f492e075fd94e1e7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14380
Commit-Queue: Yunchao He <yunchao.he@intel.com>
Reviewed-by: Austin Eng <enga@chromium.org>
2019-12-09 23:59:28 +00:00
..
2019-11-07 22:23:29 +00:00