mirror of https://github.com/xemu-project/xemu.git
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
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* Offscreen OpenGL abstraction layer - CGL (Apple) specific
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*
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* Copyright (c) 2013 Wayo
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <dlfcn.h>
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#include "gloffscreen.h"
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#include <OpenGL/CGLTypes.h>
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#include <OpenGL/CGLCurrent.h>
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struct _GloContext {
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CGLContextObj cglContext;
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};
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/* Create an OpenGL context for a certain pixel format. formatflags are from
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* the GLO_ constants */
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GloContext *glo_context_create(void)
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{
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CGLError err;
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GloContext *context = (GloContext *)malloc(sizeof(GloContext));
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/* pixel format attributes */
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CGLPixelFormatAttribute attributes[] = {
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kCGLPFAAccelerated,
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kCGLPFAOpenGLProfile,
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(CGLPixelFormatAttribute)kCGLOGLPVersion_GL3_Core,
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(CGLPixelFormatAttribute)0
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};
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CGLPixelFormatObj pix;
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GLint num;
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err = CGLChoosePixelFormat(attributes, &pix, &num);
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if (err) return NULL;
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err = CGLCreateContext(pix, NULL, &context->cglContext);
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if (err) return NULL;
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CGLDestroyPixelFormat(pix);
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glo_set_current(context);
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return context;
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}
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void* glo_get_extension_proc(const char* ext_proc)
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{
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return dlsym(RTLD_NEXT, ext_proc);
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}
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/* Set current context */
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void glo_set_current(GloContext *context)
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{
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if (context == NULL) {
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CGLSetCurrentContext(NULL);
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} else {
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CGLSetCurrentContext(context->cglContext);
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}
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}
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/* Destroy a previously created OpenGL context */
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void glo_context_destroy(GloContext *context)
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{
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if (!context) return;
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glo_set_current(NULL);
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CGLDestroyContext(context->cglContext);
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}
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