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      1 /*
      2  * GLX implementation that uses Apple's OpenGL.framework
      3  *
      4  * Copyright (c) 2007-2011 Apple Inc.
      5  * Copyright (c) 2004 Torrey T. Lyons. All Rights Reserved.
      6  * Copyright (c) 2002 Greg Parker. All Rights Reserved.
      7  *
      8  * Portions of this file are copied from Mesa's xf86glx.c,
      9  * which contains the following copyright:
     10  *
     11  * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
     12  * All Rights Reserved.
     13  *
     14  * Permission is hereby granted, free of charge, to any person obtaining a
     15  * copy of this software and associated documentation files (the "Software"),
     16  * to deal in the Software without restriction, including without limitation
     17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     18  * and/or sell copies of the Software, and to permit persons to whom the
     19  * Software is furnished to do so, subject to the following conditions:
     20  *
     21  * The above copyright notice and this permission notice shall be included in
     22  * all copies or substantial portions of the Software.
     23  *
     24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     25  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     27  * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     28  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     29  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     30  * DEALINGS IN THE SOFTWARE.
     31  */
     32 
     33 #include <assert.h>
     34 #include <dlfcn.h>
     35 #include <stdlib.h>
     36 #include <string.h>
     37 #include <stdio.h>
     38 
     39 #include <GL/gl.h>
     40 
     41 #include "main/glheader.h"
     42 #include "glapi.h"
     43 #include "glapitable.h"
     44 #include "main/dispatch.h"
     45 
     46 #include "apple_glx.h"
     47 #include "apple_xgl_api.h"
     48 #include "apple_cgl.h"
     49 
     50 struct _glapi_table * __ogl_framework_api = NULL;
     51 struct _glapi_table * __applegl_api = NULL;
     52 
     53 static void _apple_glapi_create_table(void) {
     54     if (__applegl_api)
     55         return;
     56 
     57     __ogl_framework_api = _glapi_create_table_from_handle(apple_cgl_get_dl_handle(), "gl");
     58     assert(__ogl_framework_api);
     59 
     60     __applegl_api = malloc(sizeof(struct _glapi_table));
     61     assert(__applegl_api);
     62     memcpy(__applegl_api, __ogl_framework_api, sizeof(struct _glapi_table));
     63 
     64     SET_ReadPixels(__applegl_api, __applegl_glReadPixels);
     65     SET_CopyPixels(__applegl_api, __applegl_glCopyPixels);
     66     SET_CopyColorTable(__applegl_api, __applegl_glCopyColorTable);
     67     SET_DrawBuffer(__applegl_api, __applegl_glDrawBuffer);
     68     SET_DrawBuffers(__applegl_api, __applegl_glDrawBuffers);
     69     SET_Viewport(__applegl_api, __applegl_glViewport);
     70 }
     71 
     72 void apple_glapi_set_dispatch(void) {
     73     _apple_glapi_create_table();
     74     _glapi_set_dispatch(__applegl_api);
     75 }
     76 
     77 void apple_glapi_oglfw_viewport_scissor(GLint x, GLint y, GLsizei width, GLsizei height) {
     78     _apple_glapi_create_table();
     79     __ogl_framework_api->Viewport(x, y, width, height);
     80     __ogl_framework_api->Scissor(x, y, width, height);
     81 }
     82