src/glx/apple/apple_glapi.c

   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
  45 #include "apple_glx.h"
  46 #include "apple_xgl_api.h"
  47 #include "apple_cgl.h"
  48
  49 struct _glapi_table * __ogl_framework_api = NULL;
  50 struct _glapi_table * __applegl_api = NULL;
  51
  52 static void _apple_glapi_create_table(void) {
  53     if (__applegl_api)
  54         return;
  55
  56     __ogl_framework_api = _glapi_create_table_from_handle(apple_cgl_get_dl_handle(), "gl");
  57     assert(__ogl_framework_api);
  58
  59     __applegl_api = malloc(sizeof(struct _glapi_table));
  60     assert(__applegl_api);
  61     memcpy(__applegl_api, __ogl_framework_api, sizeof(struct _glapi_table));
  62
  63     _glapi_table_patch(__applegl_api, "ReadPixels", __applegl_glReadPixels);
  64     _glapi_table_patch(__applegl_api, "CopyPixels", __applegl_glCopyPixels);
  65     _glapi_table_patch(__applegl_api, "CopyColorTable", __applegl_glCopyColorTable);
  66     _glapi_table_patch(__applegl_api, "DrawBuffers", __applegl_glDrawBuffer);
  67     _glapi_table_patch(__applegl_api, "Viewport", __applegl_glViewport);
  68 }
  69
  70 void apple_glapi_set_dispatch(void) {
  71     _apple_glapi_create_table();
  72     _glapi_set_dispatch(__applegl_api);
  73 }
  74
  75 void apple_glapi_oglfw_viewport_scissor(GLint x, GLint y, GLsizei width, GLsizei height) {
  76     _apple_glapi_create_table();
  77     __ogl_framework_api->Viewport(x, y, width, height);
  78     __ogl_framework_api->Scissor(x, y, width, height);
  79 }