b07816d62b
In gl::ReadPixels(), ValidateReadPixels() will try to
flush staged updates before readPixels. In the case
where a texture was initialized with null RGBA data,
no Framebuffer dirty bits are set, and thus the staged
clear would never be flushed from the staged updates.
1. Add robust init in TextureVk::initImage to ensure
image is initialized.
Test: ./angle_end2end_tests --gtest_filter=\
RobustResourceInitTest*_Vulkan_AllocateNonZeroMemory
2. Update stageSubresourceRobustClear() to
kEmulatedInitColorValue in the case where robust resource
was initialized without full RGBA format to update
init value of robust resource.
Test: texture-attachment-formats.html in
webgl_conformance_vulkan_passthrough_tests.
3. Revert "Suppress Vulkan RobustResourceInit tests."
Revert commit a8e6a46312.
Reason for revert: re-enable related robust tests.
Bug: angleproject:4255
Change-Id: I79f20e0c02c2f1b1cd68ab590f0f765229f9e780
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1985503
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
ANGLE - Almost Native Graphics Layer Engine
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, 3.0 and 3.1 to Vulkan, desktop OpenGL, OpenGL ES, Direct3D 9, and Direct3D 11. Future plans include ES 3.2, translation to Metal and MacOS, Chrome OS, and Fuchsia support.
Level of OpenGL ES support via backing renderers
| Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | Metal | |
|---|---|---|---|---|---|---|
| OpenGL ES 2.0 | complete | complete | complete | complete | complete | in progress |
| OpenGL ES 3.0 | complete | complete | complete | complete | ||
| OpenGL ES 3.1 | in progress | complete | complete | in progress | ||
| OpenGL ES 3.2 | in progress | in progress | in progress |
Platform support via backing renderers
| Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | Metal | |
|---|---|---|---|---|---|---|
| Windows | complete | complete | complete | complete | complete | |
| Linux | complete | complete | ||||
| Mac OS X | complete | in progress | ||||
| iOS | planned | |||||
| Chrome OS | complete | planned | ||||
| Android | complete | complete | ||||
| Fuchsia | in progress |
ANGLE v1.0.772 was certified compliant by passing the ES 2.0.3 conformance tests in October 2011. With the Vulkan backend, ANGLE 2.1.0.d46e2fb1e341 was certified compliant to ES 2.0 in Nov 2019, and ANGLE 2.1.0.f18ff947360d to ES 3.0 in Feb 2020. 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, Vulkan GLSL, Direct3D HLSL, and even ESSL for native GLES2 platforms.
Sources
ANGLE repository is hosted by Chromium project and can be browsed online or cloned with
git clone https://chromium.googlesource.com/angle/angle
Building
View the Dev setup instructions.
Contributing
-
Join our Google group to keep up to date.
-
Join us on IRC in the #ANGLEproject channel on FreeNode.
-
Join us on Slack in the #angle channel.
-
File bugs in the issue tracker (preferably with an isolated test-case).
-
Choose an ANGLE branch to track in your own project.
-
Read ANGLE development documentation.
-
Become a code contributor.
-
Use ANGLE's coding standard.
-
Learn how to build ANGLE for Chromium development.
-
Get help on debugging ANGLE.
-
Go through ANGLE's orientation and sift through starter projects.
-
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 presentation.
-
Watch a short presentation on the Vulkan back-end.
-
Track the dEQP test conformance
-
Read design docs on the Vulkan back-end
-
If you use ANGLE in your own project, we'd love to hear about it!