Add Platform methods for event tracing.

Event tracing requires pulling in timing counters, so we can sync
with Chromium's timestamps. It may require a bit more tricky stuff
to sync ANGLE's GPU timestamps with trace timestamps, but should
allow us to add GPU trace events in the future.

BUG=chromium:436191
BUG=angleproject:966

Change-Id: Ie1dc2981650d96888f988fa74b6fa435fbe8edc2
Reviewed-on: https://chromium-review.googlesource.com/263781
Reviewed-by: Brandon Jones <bajones@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
2 files changed
tree: ed08e5da971cf93dc9d993b9a7069d4f6fac1c1f
  1. build/
  2. extensions/
  3. include/
  4. samples/
  5. src/
  6. util/
  7. .gitattributes
  8. .gitignore
  9. angle.isolate
  10. AUTHORS
  11. BUILD.gn
  12. codereview.settings
  13. CONTRIBUTORS
  14. DEPS
  15. enumerate_files.py
  16. generate_winrt_projects.py
  17. LICENSE
  18. README.chromium
  19. README.md
README.md

#ANGLE The goal of ANGLE is to allow Windows users to seamlessly run WebGL and other OpenGL ES content by translating OpenGL ES API calls to DirectX 9 or DirectX 11 API calls.

ANGLE is a conformant implementation of the OpenGL ES 2.0 specification that is hardware‐accelerated via Direct3D. ANGLE v1.0.772 was certified compliant by passing the ES 2.0.3 conformance tests in October 2011. ANGLE also provides an implementation of the EGL 1.4 specification. Work on ANGLE's OpenGL ES 3.0 implementation is currently in progress, but should not be considered stable.

ANGLE is used as the default WebGL backend for both Google Chrome and Mozilla Firefox on Windows platforms. Chrome uses ANGLE for all graphics rendering on Windows, including the accelerated Canvas2D implementation and the Native Client sandbox environment.

Portions of the ANGLE shader compiler are used as a shader validator and translator by WebGL implementations across multiple platforms. It is used on Mac OS X, Linux, and in mobile variants of the browsers. Having one shader validator helps to ensure that a consistent set of GLSL ES shaders are accepted across browsers and platforms. The shader translator can be used to translate shaders to other shading languages, and to optionally apply shader modifications to work around bugs or quirks in the native graphics drivers. The translator targets Desktop GLSL, Direct3D HLSL, and even ESSL for native GLES2 platforms.

##Building For building instructions, visit the dev setup wiki.

##Contributing