Developer(s) | |
---|---|
Repository | |
Written in | C++ |
Platform | Cross-platform |
Type | Graphics engine |
License | BSD 3-Clause License |
Website | angleproject |
ANGLE (Almost Native Graphics Layer Engine) is an open source, cross-platform graphics engine abstraction layer developed by Google. [1] ANGLE translates OpenGL ES 2/3 calls to DirectX 9, 11, OpenGL or Vulkan API calls. [2] [3] [4] [5] It is a portable version of OpenGL but with limitations of OpenGL ES standard. [6] [7]
The API is mainly designed to bring up a high-performance OpenGL compatibility to Microsoft Windows and to web browsers such as Chromium by translating OpenGL calls to Direct3D, which has much better driver support on Windows systems. [3] [4] [5] On Windows, there are two backend renderers for ANGLE: the oldest one uses Direct3D 9.0c, while the newer one uses Direct3D 11. [8]
ANGLE is currently used by Google Chrome (embedded into the Blink browser engine), Firefox, [9] Edge, WebKit, and the Qt Framework. [10] The engine is also used by Windows 10 for compatibility with apps ported from Android. [11] Throughout 2019, the Apple team contributed a Metal API backend for the ANGLE so Apple devices could run on their native graphics APIs. [12]
ANGLE is distributed under a BSD-license.
The project started as a way for Google to bring full hardware acceleration for WebGL to Windows without relying on OpenGL graphics drivers. Google initially released the program under the BSD license. [13]
The current production version (2.1.x) implements OpenGL ES 2.0, 3.0, 3.1 and EGL 1.5, claiming to pass the conformance tests for both. Work was started on then future OpenGL ES 3.0 version, [8] for the newer Direct3D 11 backend. [14]
The capability to use ANGLE in a Windows Store app was added in 2014. [11] Microsoft contributed support for lower feature levels to the project. Supporting CoreWindow and SwapChainPanel in ANGLE's EGL allows applications to run on Windows 8.1, Windows Phone 8.1, and later. [15]
Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | Metal | |
---|---|---|---|---|---|---|
OpenGL ES 2.0 | complete | complete | complete | complete | complete | complete |
OpenGL ES 3.0 | complete | complete | complete | complete | complete | |
OpenGL ES 3.1 | incomplete | complete | complete | complete | ||
OpenGL ES 3.2 | in progress | in progress | complete |
Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | Metal | |
---|---|---|---|---|---|---|
Windows | complete | complete | complete | complete | complete | |
Linux | complete | complete | ||||
macOS | complete | complete | ||||
iOS | complete | |||||
ChromeOS | complete | Planned | ||||
Android | complete | complete | ||||
GGP (Stadia) | complete | |||||
Fuchsia | complete |
ANGLE is currently used in a number of programs and software.
OpenGL is a cross-language, cross-platform application programming interface (API) for rendering 2D and 3D vector graphics. The API is typically used to interact with a graphics processing unit (GPU), to achieve hardware-accelerated rendering.
Direct3D is a graphics application programming interface (API) for Microsoft Windows. Part of DirectX, Direct3D is used to render three-dimensional graphics in applications where performance is important, such as games. Direct3D uses hardware acceleration if it is available on the graphics card, allowing for hardware acceleration of the entire 3D rendering pipeline or even only partial acceleration. Direct3D exposes the advanced graphics capabilities of 3D graphics hardware, including Z-buffering, W-buffering, stencil buffering, spatial anti-aliasing, alpha blending, color blending, mipmapping, texture blending, clipping, culling, atmospheric effects, perspective-correct texture mapping, programmable HLSL shaders and effects. Integration with other DirectX technologies enables Direct3D to deliver such features as video mapping, hardware 3D rendering in 2D overlay planes, and even sprites, providing the use of 2D and 3D graphics in interactive media ties.
WebKit is a browser engine primarily used in Apple's Safari web browser, as well as all web browsers on iOS and iPadOS. WebKit is also used by the PlayStation consoles starting with the PS3, the Tizen mobile operating systems, the Amazon Kindle e-book reader, Nintendo consoles starting with the 3DS Internet Browser, and the discontinued BlackBerry Browser.
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Cairo is an open-source graphics library that provides a vector graphics-based, device-independent API for software developers. It provides primitives for two-dimensional drawing across a number of different backends. Cairo uses hardware acceleration when available.
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Mesa, also called Mesa3D and The Mesa 3D Graphics Library, is an open source implementation of OpenGL, Vulkan, and other graphics API specifications. Mesa translates these specifications to vendor-specific graphics hardware drivers.
OpenGL Shading Language (GLSL) is a high-level shading language with a syntax based on the C programming language. It was created by the OpenGL ARB to give developers more direct control of the graphics pipeline without having to use ARB assembly language or hardware-specific languages.
A graphics library or graphics API is a program library designed to aid in rendering computer graphics to a monitor. This typically involves providing optimized versions of functions that handle common rendering tasks. This can be done purely in software and running on the CPU, common in embedded systems, or being hardware accelerated by a GPU, more common in PCs. By employing these functions, a program can assemble an image to be output to a monitor. This relieves the programmer of the task of creating and optimizing these functions, and allows them to focus on building the graphics program. Graphics libraries are mainly used in video games and simulations.
Web3D, also called 3D Web, is a group of technologies to display and navigate websites using 3D computer graphics.
Direct2D is a 2D vector graphics application programming interface (API) designed by Microsoft and implemented in Windows 10, Windows 8, Windows 7 and Windows Server 2008 R2, and also Windows Vista and Windows Server 2008.
The Skia Graphics Engine or Skia is an open-source 2D graphics library written in C++. Skia abstracts away platform-specific graphics APIs. Skia Inc. originally developed the library; Google acquired it in 2005, and then released the software as open source licensed under the New BSD free software license in 2008.
WebGL is a JavaScript API for rendering interactive 2D and 3D graphics within any compatible web browser without the use of plug-ins. WebGL is fully integrated with other web standards, allowing GPU-accelerated usage of physics, image processing, and effects in the HTML canvas. WebGL elements can be mixed with other HTML elements and composited with other parts of the page or page background.
EGL is an interface between Khronos rendering APIs and the underlying native platform windowing system. EGL handles graphics context management, surface/buffer binding, rendering synchronization, and enables "high-performance, accelerated, mixed-mode 2D and 3D rendering using other Khronos APIs." EGL is managed by the non-profit technology consortium Khronos Group.
Mantle was a low-overhead rendering API targeted at 3D video games. AMD originally developed Mantle in cooperation with DICE, starting in 2013. Mantle was designed as an alternative to Direct3D and OpenGL, primarily for use on personal computers, although Mantle supports the GPUs present in the PlayStation 4 and in the Xbox One. In 2015, Mantle's public development was suspended and in 2019 completely discontinued, as DirectX 12 and the Mantle-derived Vulkan rose in popularity.
Vulkan is a low-level, low-overhead cross-platform API and open standard for 3D graphics and computing. It was intended to address the shortcomings of OpenGL, and allow developers more control over the GPU. It is designed to support a wide variety of GPUs, CPUs and operating systems, and it is also designed to work with modern multi-core CPUs.
glTF is a standard file format for three-dimensional scenes and models. A glTF file uses one of two possible file extensions: .gltf (JSON/ASCII) or .glb (binary). Both .gltf and .glb files may reference external binary and texture resources. Alternatively, both formats may be self-contained by directly embedding binary data buffers. An open standard developed and maintained by the Khronos Group, it supports 3D model geometry, appearance, scene graph hierarchy, and animation. It is intended to be a streamlined, interoperable format for the delivery of 3D assets, while minimizing file size and runtime processing by apps. As such, its creators have described it as the "JPEG of 3D."
WebGPU is a JavaScript API provided by a web browser that enables webpage scripts to efficiently utilize a device's graphics processing unit (GPU). This is achieved with the underlying Vulkan, Metal, or Direct3D 12 system APIs. On relevant devices, WebGPU is intended to supersede the older WebGL standard.