diff options
Diffstat (limited to 'src/glx/apple/apple_cgl.c')
-rw-r--r-- | src/glx/apple/apple_cgl.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/glx/apple/apple_cgl.c b/src/glx/apple/apple_cgl.c new file mode 100644 index 0000000..737d757 --- /dev/null +++ b/src/glx/apple/apple_cgl.c @@ -0,0 +1,128 @@ +/* + Copyright (c) 2008 Apple Inc. + + Permission is hereby granted, free of charge, to any person + obtaining a copy of this software and associated documentation files + (the "Software"), to deal in the Software without restriction, + including without limitation the rights to use, copy, modify, merge, + publish, distribute, sublicense, and/or sell copies of the Software, + and to permit persons to whom the Software is furnished to do so, + subject to the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT + HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + DEALINGS IN THE SOFTWARE. + + Except as contained in this notice, the name(s) of the above + copyright holders shall not be used in advertising or otherwise to + promote the sale, use or other dealings in this Software without + prior written authorization. +*/ + +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <dlfcn.h> + +#include "apple_cgl.h" +#include "apple_glx.h" + +#ifndef OPENGL_FRAMEWORK_PATH +#define OPENGL_FRAMEWORK_PATH "/System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL" +#endif + +static void *dl_handle = NULL; + +struct apple_cgl_api apple_cgl; + +static bool initialized = false; + +static void * +sym(void *h, const char *name) +{ + void *s; + + s = dlsym(h, name); + + if (NULL == s) { + fprintf(stderr, "error: %s\n", dlerror()); + abort(); + } + + return s; +} + +void +apple_cgl_init(void) +{ + void *h; + GLint major = 0, minor = 0; + const char *opengl_framework_path; + + if (initialized) + return; + + opengl_framework_path = getenv("OPENGL_FRAMEWORK_PATH"); + if (!opengl_framework_path) { + opengl_framework_path = OPENGL_FRAMEWORK_PATH; + } + + (void) dlerror(); /*drain dlerror */ + h = dlopen(opengl_framework_path, RTLD_NOW); + + if (NULL == h) { + fprintf(stderr, "error: unable to dlopen %s : %s\n", + opengl_framework_path, dlerror()); + abort(); + } + + dl_handle = h; + + apple_cgl.get_version = sym(h, "CGLGetVersion"); + + apple_cgl.get_version(&major, &minor); + + apple_glx_diagnostic("CGL major %d minor %d\n", major, minor); + + if (1 != major) { + fprintf(stderr, "WARNING: the CGL major version has changed!\n" + "libGL may be incompatible!\n"); + } + + apple_cgl.choose_pixel_format = sym(h, "CGLChoosePixelFormat"); + apple_cgl.destroy_pixel_format = sym(h, "CGLDestroyPixelFormat"); + + apple_cgl.clear_drawable = sym(h, "CGLClearDrawable"); + apple_cgl.flush_drawable = sym(h, "CGLFlushDrawable"); + + apple_cgl.create_context = sym(h, "CGLCreateContext"); + apple_cgl.destroy_context = sym(h, "CGLDestroyContext"); + + apple_cgl.set_current_context = sym(h, "CGLSetCurrentContext"); + apple_cgl.get_current_context = sym(h, "CGLGetCurrentContext"); + apple_cgl.error_string = sym(h, "CGLErrorString"); + + apple_cgl.set_off_screen = sym(h, "CGLSetOffScreen"); + + apple_cgl.copy_context = sym(h, "CGLCopyContext"); + + apple_cgl.create_pbuffer = sym(h, "CGLCreatePBuffer"); + apple_cgl.destroy_pbuffer = sym(h, "CGLDestroyPBuffer"); + apple_cgl.set_pbuffer = sym(h, "CGLSetPBuffer"); + + initialized = true; +} + +void * +apple_cgl_get_dl_handle(void) +{ + return dl_handle; +} |