Revision: 227 http://trac.macosforge.org/projects/xquartz/changeset/227 Author: gstaplin@apple.com Date: 2009-02-21 21:19:26 -0800 (Sat, 21 Feb 2009) Log Message: ----------- Add a test program that according to the CGL documentation provides the maximum size of a Pbuffer. This is used for getting a value for the xserver's hw/xquartz/GL/indirect.c We may at some point want to create a context, and probe at runtime, but I'm not sure what will be involved with doing that in the X server. Added Paths: ----------- AppleSGLX/trunk/apple_GL_pbuffer_max.c Added: AppleSGLX/trunk/apple_GL_pbuffer_max.c =================================================================== --- AppleSGLX/trunk/apple_GL_pbuffer_max.c (rev 0) +++ AppleSGLX/trunk/apple_GL_pbuffer_max.c 2009-02-22 05:19:26 UTC (rev 227) @@ -0,0 +1,42 @@ +#include <stdio.h> +#include <stdlib.h> +#include <OpenGL/OpenGL.h> + +int main() { + CGLPixelFormatAttribute attribs[] = { + kCGLPFAAccelerated, + kCGLPFADoubleBuffer, + kCGLPFAColorSize, 24, + 0 + }; + + CGLPixelFormatObj pixobj; + GLint npix; + CGLError err; + CGLContextObj context; + GLint maxview[2]; + + err = CGLChoosePixelFormat(attribs, &pixobj, &npix); + + if(err != kCGLNoError) { + fprintf(stderr, "choose pixel format error!\n"); + return EXIT_FAILURE; + } + + err = CGLCreateContext(pixobj, NULL, &context); + + if(err != kCGLNoError) { + fprintf(stderr, "create context error!\n"); + return EXIT_FAILURE; + } + + CGLSetCurrentContext(context); + + maxview[0] = 0; + maxview[1] = 0; + glGetIntegerv(GL_MAX_VIEWPORT_DIMS, maxview); + + printf("max pbuffer width %d heigth %d\n", maxview[0], maxview[1]); + + return EXIT_SUCCESS; +}