1 /*
2 * Copyright © 2014 Jon Turney
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 /*
25 Wrapper functions for calling WGL extension functions
26 */
27
28 #include "wgl.h"
29
30 #include <stdio.h>
31
32 #define RESOLVE_DECL(type) \
33 static type type##proc = NULL;
34
35 #define PRERESOLVE(type, symbol) \
36 type##proc = (type)wglGetProcAddress(symbol); \
37 if (type##proc == NULL) \
38 printf("Can't resolve \"%s\"\n", symbol);
39
40 #define CHECK_RESOLVED(type, retval) \
41 if (type##proc == NULL) { \
42 return retval; \
43 }
44
45 #define RESOLVED_PROC(type) type##proc
46
47 RESOLVE_DECL(PFNWGLGETEXTENSIONSSTRINGARBPROC);
48 RESOLVE_DECL(PFNWGLCREATECONTEXTATTRIBSARBPROC);
49 RESOLVE_DECL(PFNWGLMAKECONTEXTCURRENTARBPROC);
50 RESOLVE_DECL(PFNWGLCREATEPBUFFERARBPROC);
51 RESOLVE_DECL(PFNWGLGETPBUFFERDCARBPROC);
52 RESOLVE_DECL(PFNWGLRELEASEPBUFFERDCARBPROC);
53 RESOLVE_DECL(PFNWGLDESTROYPBUFFERARBPROC);
54
wglResolveExtensionProcs(void)55 void wglResolveExtensionProcs(void)
56 {
57 PRERESOLVE(PFNWGLGETEXTENSIONSSTRINGARBPROC, "wglGetExtensionsStringARB");
58 PRERESOLVE(PFNWGLCREATECONTEXTATTRIBSARBPROC, "wglCreateContextAttribsARB");
59 PRERESOLVE(PFNWGLMAKECONTEXTCURRENTARBPROC, "wglMakeContextCurrentARB");
60 PRERESOLVE(PFNWGLCREATEPBUFFERARBPROC, "wglCreatePbufferARB");
61 PRERESOLVE(PFNWGLGETPBUFFERDCARBPROC, "wglGetPbufferDCARB");
62 PRERESOLVE(PFNWGLRELEASEPBUFFERDCARBPROC, "wglReleasePbufferDCARB");
63 PRERESOLVE(PFNWGLDESTROYPBUFFERARBPROC, "wglDestroyPbufferARB");
64 }
65
wglGetExtensionsStringARB(HDC hdc_)66 const char *wglGetExtensionsStringARB(HDC hdc_)
67 {
68 CHECK_RESOLVED(PFNWGLGETEXTENSIONSSTRINGARBPROC, "");
69 return RESOLVED_PROC(PFNWGLGETEXTENSIONSSTRINGARBPROC)(hdc_);
70 }
71
wglCreateContextAttribsARB(HDC hdc_,HGLRC hShareContext_,const int * attribList_)72 HGLRC wglCreateContextAttribsARB(HDC hdc_, HGLRC hShareContext_,
73 const int *attribList_)
74 {
75 CHECK_RESOLVED(PFNWGLCREATECONTEXTATTRIBSARBPROC, NULL);
76 return RESOLVED_PROC(PFNWGLCREATECONTEXTATTRIBSARBPROC)(hdc_, hShareContext_, attribList_);
77 }
78
wglMakeContextCurrentARB(HDC hDrawDC_,HDC hReadDC_,HGLRC hglrc_)79 BOOL wglMakeContextCurrentARB(HDC hDrawDC_, HDC hReadDC_, HGLRC hglrc_)
80 {
81 CHECK_RESOLVED(PFNWGLMAKECONTEXTCURRENTARBPROC, FALSE);
82 return RESOLVED_PROC(PFNWGLMAKECONTEXTCURRENTARBPROC)(hDrawDC_, hReadDC_, hglrc_);
83 }
84
wglCreatePbufferARB(HDC hDC_,int iPixelFormat_,int iWidth_,int iHeight_,const int * piAttribList_)85 HPBUFFERARB wglCreatePbufferARB(HDC hDC_, int iPixelFormat_, int iWidth_,
86 int iHeight_, const int *piAttribList_)
87 {
88 CHECK_RESOLVED(PFNWGLCREATEPBUFFERARBPROC, NULL);
89 return RESOLVED_PROC(PFNWGLCREATEPBUFFERARBPROC)(hDC_, iPixelFormat_, iWidth_, iHeight_, piAttribList_);
90 }
91
wglGetPbufferDCARB(HPBUFFERARB hPbuffer_)92 HDC wglGetPbufferDCARB(HPBUFFERARB hPbuffer_)
93 {
94 CHECK_RESOLVED(PFNWGLGETPBUFFERDCARBPROC, NULL);
95 return RESOLVED_PROC(PFNWGLGETPBUFFERDCARBPROC)(hPbuffer_);
96 }
97
wglReleasePbufferDCARB(HPBUFFERARB hPbuffer_,HDC hDC_)98 int wglReleasePbufferDCARB(HPBUFFERARB hPbuffer_, HDC hDC_)
99 {
100 CHECK_RESOLVED(PFNWGLRELEASEPBUFFERDCARBPROC, 0)
101 return RESOLVED_PROC(PFNWGLRELEASEPBUFFERDCARBPROC)(hPbuffer_, hDC_);
102 }
103
wglDestroyPbufferARB(HPBUFFERARB hPbuffer_)104 BOOL wglDestroyPbufferARB(HPBUFFERARB hPbuffer_)
105 {
106 CHECK_RESOLVED(PFNWGLDESTROYPBUFFERARBPROC, FALSE);
107 return RESOLVED_PROC(PFNWGLDESTROYPBUFFERARBPROC)(hPbuffer_);
108 }
109