kc3-lang/angle

2017-06-05T10:50:59

Make gl::Compiler reference-counted. This is helpful for implementing program binary caching in ANGLE. in order to maintain the current behaviour in Chrome, we will need to defer shader compilation until link time. Since WebGL allows the app layer to enable and disable extensions explicitly, the app can enable or disable an extension between the calls to glCompileShader and glLinkProgram. Then, if we're deferring shader compilation, we will have to preserve the extension settings at the time of the call to compile, not the current settings at the time of link. Making the compiler reference-counted gives us a pretty simple and robust solution. This also changes the Context class to lazily init the shader compiler. Lazy init prevents any unexpected nulls, and also ensures the releaseShaderCompiler does exactly that: just releases the shader compiler, and does not immediately re-initialize it. BUG=angleproject:2044 Change-Id: I0f0eeb4eb94dc4eee238f92482804a0921c77df0 Reviewed-on: https://chromium-review.googlesource.com/522868 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>