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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.