Hash :
134425c7
Author :
Date :
2019-03-15T17:02:17
Vulkan:Integrate SecondaryCommandBuffers Integrate the custom SecondaryCommandBuffer type into the CommandGraph nodes by adding new ANGLE_USE_CUSTOM_VULKAN_CMD_BUFFERS define that can be set in the BUILD gn args with angle_enable_custom_vulkan_cmd_buffers set to "true." Initially the custom cmd buffers are disabled by default. This adds some support functions to SecondaryCommandBuffer to make the integration easier by matching the wrapped cmd buffer interface: initialize(), end(), valid(). Bug: angleproject:3136 Change-Id: Ib910554583192550757bb8ce89914e3ea8737988 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1526556 Commit-Queue: Tobin Ehlis <tobine@google.com> Reviewed-by: 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 | in progress | |||
| Mac OS X | in progress | ||||
| Chrome OS | complete | planned | |||
| Android | complete | in progress |
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.
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