Regal
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Regal is an open source library that provides a consistent OpenGL API across platforms through emulation to enable portability of OpenGL code, it aims to make OpenGL development easier through debugging tools and it supports modern and legacy OpenGL features through emulation where needed.
Regal
- 1. Regal for OpenGL development Nigel T. Stewart NVIDIA Corporation August 4th, 2012
- 2. Regal Goals Open Source There is nothing behind the curtain. You can see what Regal is doing and change it if needed. Portability Consistent OpenGL API that runs on all major platforms: Windows, Linux, Mac, iOS, and Android Compatible Immediate mode, fixed function, GL_QUADS work everywhere, emulated as necessary. Modern OpenGL API Direct State Access (DSA) and Vertex Array Object (VAO), emulated as necessary.
- 3. Ease of Use Set breakpoints on OpenGL functions. Step into the code. Inspect state. Efficiency If it cannot be implemented efficiently in Regal, it is not universally supported. For example, tessellation support requires tessellation hardware.
- 4. Regal is a Work-In-Progress Emulation for OpenGL ES and Desktop GL Core contexts. Fixed-function lighting using GLSL shaders. Direct-state-access emulation. Immediate mode emulation Logging See all the application calls into Regal See all the driver calls from Regal into OpenGL GL_EXT_debug_marker emulation
- 5. Debugging Optional error checking layer. (glGetError) Access configuration, logs and GL state via HTTP. Other ideas (unimplemented as of now) Debugging checks Performance problems Statistics gathering – API coverage, time spent. Frame capture GL state capture and comparison.
- 6. Imagined Uses for Regal Using Regal as a portability layer for developing games for Windows, Linux, Android, Mac and/or iOS. As a way of running OpenGL 1.x or 2.x code in a core OpenGL context. (Apple Mac or AMD GPU) As a way of porting Linux OpenGL games to mobile devices. As a common infrastructure for OpenGL development tools.
- 7. More Information Source Code on github: https://github.com/p3/regal opengl.org forum thread: http://www.opengl.org/discussion_boards/showthread.php/1786 78-Introducing-Regal?p=1240974 Email: [email protected]