| commit | b18609b9f5fd05348f44c437061f8c160f4fe6e6 | [log] [tgz] |
|---|---|---|
| author | Kimmo Kinnunen <kkinnunen@nvidia.com> | Thu Jul 16 11:13:11 2015 |
| committer | Jamie Madill <jmadill@chromium.org> | Fri Aug 07 16:47:11 2015 |
| tree | c5a274178047ab61fc753a2e50936920be6c0394 | |
| parent | 3574c614578125562c5abe243b70d37f67d351ea [diff] |
Implement ES 2,3 parts of EXT_blend_func_extended for shader translation Exposes gl_SecondaryFragColor, glSecondaryFragData[] and gl_MaxDualSourceDrawBuffers to GLES SL 1.0. Relaxes rules for undefined output locations for GLES SL 3.0 and exposes gl_MaxDualSourceDrawBuffers. If the output GL context is GL ES 2.0 or 3.0: The emulation layer is expected to turn on EXT_blend_func_extended if the output GL context supports it. If the output GL context is GL: The emulation layer is expected to turn on EXT_blend_func_extended if the output GL context supports ARB_blend_func_extended or if GL context is 3.2 or later. If the source shader spec is GLES SL 2.0: The emulation layer is expected to inspect the shader compilation output variables upon linking. If output target is GL SL, the emulation layer should bind color location 0, index 1 to "angle_SecondaryFragColor" if variable "gl_SecondaryFragColorEXT" is used. Alternatively, emulation layer should bind "angle_SecondaryFragData" to locations 0,1,2,3,..., all color index 1, if "gl_SecondaryFragData" array is used. (The caller can not bind the locations or specify output variables.) If the source shader spec is GLES SL 3.0: The emulation layer is expected to do location auto-resolve of the the output variables that have undefined output locations that have not been bound by the caller. (The caller can not use gl_ built-ins, so nothing to do with those.) BUG=angleproject:1085 TEST=angle_unittest Change-Id: I5cafe205b0c29478b0dcd24aa89a7b0000f5d046 Reviewed-on: https://chromium-review.googlesource.com/287580 Reviewed-by: Zhenyao Mo <zmo@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Kimmo Kinnunen <kkinnunen@nvidia.com>
#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 View the Dev setup instructions.
##Contributing