| 0,0 → 1,127 |
|---|
| /* |
| 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; |
| 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(&apple_cgl.version_major, &apple_cgl.version_minor); |
| |
| apple_glx_diagnostic("CGL major %d minor %d\n", apple_cgl.version_major, apple_cgl.version_minor); |
| |
| if (1 != apple_cgl.version_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; |
| } |