SDL2 and GLES 1 on the desktop |
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Guest
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Hi,
I had converted (or so I thought) my game (Bitfighter) to use GLES 1, the subset of OpenGL 1 that it has traditionally used. I know it is old and outdated and we have great plans to add an abstraction layer for GLES 2. But in the meantime, I'd like to get GLES 1 to properly work - apparently it doesn't work on some devices like RPi and ODROID, and it just shows a black screen. It otherwise compiles just find with SDL2. In order to debug this, I've been compiling and linking the game with SDL2 and libGLESv1_CM on my desktop Linux system (openSUSE 13.2 x86_64), which is part of the Mesa project providing GLES1 support on the desktop. I launch the game using the standard SDL_CreateWindow() and SDL_GL_CreateContext() calls. Doing this, even when linking to the GLES1 libraries results in a glGetString() version of "3.0 Mesa 10.3.7" and the game shows a black screen. I've traced the black screen down to glOrtho not working with the GL context I have. Figuring I don't have an ES context I added this code to explicitly try and grab one (before window creation): SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES); SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 1); SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1); But using this results in an SDL error of "Could not create GL context". Is there a way to get a proper GLES 1 context on my desktop system so I can further debug? Thanks! David _______________________________________________ SDL mailing list http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org |
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