open source projects around the opengl es api

© Copyright Khronos Group, 2006 -

Open Source ProjectsOpen Source Projectsaround the OpenGL ES APIaround the OpenGL ES API

Hans-Martin WillProject Lead, Vincent


OverviewOverview• Applications of OpenGL ES API

- Application Programs- Games & Game Engines- Libraries and Wappers

• Vincent Project- OpenGL ES 1.x API- OpenGL ES 2.x API

• Q & A


Pocket BlenderPocket Blender• Port of Blender 3D modeling

application• Windows Mobile

• Case-study for porting legacy OpenGL application to ES:

- Use OpenGL emulation layer to get started - In thise case: Klimt ES

- Convert to OpenGL ES API

• Binary License and GPL• http://russose.free.fr/BlenderPocket/


Quake 3 ArenaQuake 3 Arena• Port of Quake 3 Arena to Pocket PC• Windows Mobile 2003, 5 in the works

• Code base converted to fixed point!- And many other profile-guided changes- Case study for porting AAA title to mobile

• Playable frame-rates on hardware OpenGL ES implementation

• GPL

• http://www.noctemware.com/q3ce.html


OGRE Game EngineOGRE Game Engine• Port of OGRE to PocketPCs• Windows Mobile

• Considered one of the best OSS game engines out there

• Great asset tool chain (Collada, Blender, 3dsmax, Maya, …)

• Porting process described in- http://www.gprt.ufpe.br/~grvm/pdfs/

ArtigosCompletos/2006/SVR2006_Limaetal.pdf

• LGPL• Siggraph:

- BOF Thu at 2 pm, #213

• http://www.cin.ufpe.br/~grvm/• http://www.manifestgames.com/


Torus 3D EngineTorus 3D Engine• Game engine specifically developed for mobile

devices• BREW

• BSP-based• Small footprint, fixed-point math• Exporters for 3dsmax

• BSD License

• http://www.imersiva.com/torus3d.php

• http://sourceforge.net/projects/torus-3d


Cube EngineCube Engine• Single- and multi-player FPS engine• Simple, but not necessarily resource-conscious

• Windows Mobile, Intel XScale• Zlib/libpng License

• http://www.cubeengine.com/cube_intel_pda/


GLUT ESGLUT ES• Port of freeglut implementation; most of

GLUT v.3• WinCE and Win32

• Great to get started with OpenGL ES programming

• ZeusCMD Tutorials

• BSD-style license• http://glutes.sourceforge.net


OpenGL ES 1.0 Sample Reference OpenGL ES 1.0 Sample Reference ImplementationImplementation• Implements OpenGL ES 1.0 API on top of desktop OpenGL 1.3 impl. • Linux

• For development and testing of OpenGL ES 1.0 software on desktop computer

• Not a registered OpenGL ES implementation, but tested against OpenGL ES conformance tests.

• BSD License• http://www.khronos.org/opengles/documentation/gles-1.0c.tgz


Desktop OpenGL ESDesktop OpenGL ES• Implements OpenGL ES 1.1 API on top of desktop OpenGL 1.5 impl.• Linux, Windows XP, FreeBSD, Mac OS X

• For development and testing of OpenGL ES 1.1 software on desktop computer

• Not a registered OpenGL ES implementation, but tested against OpenGL ES conformance tests.

• BSD License• http://developer.hybrid.fi/dgles/index.html• http://sourceforge.net/projects/dgles


Misc. Applications & LibrariesMisc. Applications & Libraries• Khronos Coding Contest Entries

- http://www.khronos.org/developers/resources/opengles/

• Fogron- Tron-style game- http://www.podvlivem.net/fogron

• DOGLESS- OpenGL wrapper on top of OpenGL ES API- http://opensource.dylogic.com/DOGLESS/Articles/About.html

• Klimt ES- OpenGL wrapper on top of OpenGL ES API, used by PocketBlender- Contact Daniel Wagner


Vincent 3D Rendering Library for Vincent 3D Rendering Library for Mobile DevicesMobile Devices• Provides implementation of OpenGL ES 1.1 API; Common Lite

(fixed point)• Windows Mobile, ARM Linux

• Project created in Aug. 2003 right after release of OpenGL ES specification

• Conformance submission January 2006

• http://sourceforge.net/projects/ogl-es• BSD License


Project AdoptionProject Adoption

~2000 downloads of binaries for last release;2/3 Windows, 1/3 Linux

All time 24,669 downloads


Dynamic Compilation TechnologyDynamic Compilation Technology


What is it used for?What is it used for?

• Learning tool for OpenGL ES API- Windows Mobile is popular!

• Academic research- Mochocki, Lahiri & Cadambi (2006) Power

analysis of mobile 3D graphics, IEEE-CS\DATC- Nadalutti, Chittaro, Buttussi (2006) Rendering of

X3D content of mobile devices with OpenGL ES, Proc. 11th int. conf. on 3D Web Tech.

- Student/thesis projects

• Navigation systems- Based on support requests- Example: MagicMaps2Go


Vincent3D Rendering LibraryVincent3D Rendering Library• Goal: Develop OSS implementation of OpenGL ES 2.x API• Platform-independent C, later Verilog• Includes GL SL ES to C compiler

• Reference, content development, research• Comes with unit testing framework

• wxWindows Licence (LGPL + distribution)• http://sourceforge.net/projects/ogles2


Refresher: OpenGL ES 2.x PipelineRefresher: OpenGL ES 2.x Pipeline


Compilation ProcessCompilation Process


What’s next?What’s next?• Timeline

Alpha release of runtime Siggraph- Integrate shader language compiler 3Q06- Fully stable release 1Q07

• Outlook - Piecewise conversion to system model- Verilog

• Interested?Get involved!http://ogles2.sourceforge.net


Questions?Questions?

http://ogl-es.sourceforge.net

http://ogles2.sourceforge.net

open source projects around the opengl es api

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