Hash :
f618c9e5
        
        Author :
  
        
        Date :
2018-02-15T14:45:40
        
      
Vulkan: Add depth/stencil surfaces. This change lets us create egl::Surfaces from a D24S8 config. This is a bit hacky, because the spec only mandates 24 -or- 32 bit depth support, but not both or either individually. Will need follow-up work for proper EGL config setup. A single depth buffer is allocated for the entire set of swapchain images and is used with each. This also might be a problem if we're rendering to multiple frames at the same time. We'll likely have to revisit this in the future as well. This adds a new RenderTargetVk to the SurfaceVk class which points to the Depth/Stencil image. Since ImageViews must refer to either the depth or stencil, but not both, we'll need to address this when we get to implementing depth/stencil texture reads in shaders. Bug: angleproject:2357 Change-Id: Ibed0eed7e1d0efb272758dbfc79fa2c5aa93997f Reviewed-on: https://chromium-review.googlesource.com/919761 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>
The goal of ANGLE is to allow users of multiple operating systems to seamlessly run WebGL and other OpenGL ES content by translating OpenGL ES API calls to one of the hardware-supported APIs available for that platform. ANGLE currently provides translation from OpenGL ES 2.0 and 3.0 to desktop OpenGL, OpenGL ES, Direct3D 9, and Direct3D 11. Support for translation from OpenGL ES to Vulkan is underway, and future plans include compute shader support (ES 3.1) and MacOS support.
| Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | |
|---|---|---|---|---|---|
| OpenGL ES 2.0 | complete | complete | complete | complete | in progress | 
| OpenGL ES 3.0 | complete | complete | in progress | not started | |
| OpenGL ES 3.1 | not started | in progress | in progress | not started | 
| Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | |
|---|---|---|---|---|---|
| Windows | complete | complete | complete | complete | in progress | 
| Linux | complete | planned | |||
| Mac OS X | in progress | ||||
| Chrome OS | complete | planned | |||
| Android | complete | planned | 
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.
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.
ANGLE repository is hosted by Chromium project and can be browsed online or cloned with
git clone https://chromium.googlesource.com/angle/angle
View the Dev setup instructions. For generating a Windows Store version of ANGLE view the Windows Store instructions
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Use ANGLE’s coding standard.
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Read about WebGL on the Khronos WebGL Wiki.
Learn about implementation details in the OpenGL Insights chapter on ANGLE and this ANGLE presentation.
Learn about the past, present, and future of the ANGLE implementation in this recent presentation.
If you use ANGLE in your own project, we’d love to hear about it!