xref: /third_party/mesa3d/src/glx/windows/wgl.c (revision bf215546) 
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
47RESOLVE_DECL(PFNWGLGETEXTENSIONSSTRINGARBPROC);
48RESOLVE_DECL(PFNWGLCREATECONTEXTATTRIBSARBPROC);
49RESOLVE_DECL(PFNWGLMAKECONTEXTCURRENTARBPROC);
50RESOLVE_DECL(PFNWGLCREATEPBUFFERARBPROC);
51RESOLVE_DECL(PFNWGLGETPBUFFERDCARBPROC);
52RESOLVE_DECL(PFNWGLRELEASEPBUFFERDCARBPROC);
53RESOLVE_DECL(PFNWGLDESTROYPBUFFERARBPROC);
54
55void 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
66const char *wglGetExtensionsStringARB(HDC hdc_)
67{
68   CHECK_RESOLVED(PFNWGLGETEXTENSIONSSTRINGARBPROC, "");
69   return RESOLVED_PROC(PFNWGLGETEXTENSIONSSTRINGARBPROC)(hdc_);
70}
71
72HGLRC 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
79BOOL wglMakeContextCurrentARB(HDC hDrawDC_, HDC hReadDC_, HGLRC hglrc_)
80{
81   CHECK_RESOLVED(PFNWGLMAKECONTEXTCURRENTARBPROC, FALSE);
82   return RESOLVED_PROC(PFNWGLMAKECONTEXTCURRENTARBPROC)(hDrawDC_, hReadDC_, hglrc_);
83}
84
85HPBUFFERARB 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
92HDC wglGetPbufferDCARB(HPBUFFERARB hPbuffer_)
93{
94   CHECK_RESOLVED(PFNWGLGETPBUFFERDCARBPROC, NULL);
95   return RESOLVED_PROC(PFNWGLGETPBUFFERDCARBPROC)(hPbuffer_);
96}
97
98int wglReleasePbufferDCARB(HPBUFFERARB hPbuffer_, HDC hDC_)
99{
100   CHECK_RESOLVED(PFNWGLRELEASEPBUFFERDCARBPROC, 0)
101   return RESOLVED_PROC(PFNWGLRELEASEPBUFFERDCARBPROC)(hPbuffer_, hDC_);
102}
103
104BOOL wglDestroyPbufferARB(HPBUFFERARB hPbuffer_)
105{
106   CHECK_RESOLVED(PFNWGLDESTROYPBUFFERARBPROC, FALSE);
107   return RESOLVED_PROC(PFNWGLDESTROYPBUFFERARBPROC)(hPbuffer_);
108}
109