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a09e091a JB |
1 | /* |
2 | * File: glthunk.c | |
3 | * Purpose: cdecl thunk wrapper library for Win32 stdcall OpenGL library | |
4 | * | |
5 | * Copyright (c) Jon TURNEY 2009,2013 | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a | |
8 | * copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation | |
10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
11 | * and/or sell copies of the Software, and to permit persons to whom the | |
12 | * Software is furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
21 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
22 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
23 | * DEALINGS IN THE SOFTWARE. | |
24 | */ | |
25 | ||
26 | // define USE_OPENGL32 makes gl.h declare gl*() function prototypes with stdcall linkage, | |
27 | // so our generated wrappers will correctly link with the functions in opengl32.dll | |
28 | #define USE_OPENGL32 | |
29 | ||
30 | #ifdef HAVE_XWIN_CONFIG_H | |
31 | #include <xwin-config.h> | |
32 | #endif | |
33 | ||
34 | #include <X11/Xwindows.h> | |
35 | ||
36 | #define GL_GLEXT_LEGACY | |
37 | #include <GL/gl.h> | |
38 | #undef GL_ARB_imaging | |
39 | #undef GL_VERSION_1_3 | |
40 | #include <GL/glext.h> | |
41 | ||
42 | static PROC | |
43 | glWinResolveHelper(PROC * cache, const char *symbol) | |
44 | { | |
45 | PROC proc = NULL; | |
46 | ||
47 | /* If not yet cached, call wglGetProcAddress */ | |
48 | if ((*cache) == NULL) { | |
49 | proc = wglGetProcAddress(symbol); | |
50 | if (proc == NULL) { | |
51 | (*cache) = (PROC) - 1; | |
52 | } | |
53 | else { | |
54 | (*cache) = proc; | |
55 | } | |
56 | } | |
57 | /* Cached wglGetProcAddress failure */ | |
58 | else if ((*cache) == (PROC) - 1) { | |
59 | proc = 0; | |
60 | } | |
61 | /* Cached wglGetProcAddress result */ | |
62 | else { | |
63 | proc = (*cache); | |
64 | } | |
65 | ||
66 | return proc; | |
67 | } | |
68 | ||
69 | #define RESOLVE_RET(proctype, symbol, retval) \ | |
70 | static PROC cache = NULL; \ | |
71 | __stdcall proctype proc = (proctype)glWinResolveHelper(&cache, symbol); \ | |
72 | if (proc == NULL) { \ | |
73 | return retval; \ | |
74 | } | |
75 | ||
76 | #define RESOLVE(proctype, symbol) RESOLVE_RET(proctype, symbol,) | |
77 | ||
78 | #define RESOLVED_PROC(proctype) proc | |
79 | ||
80 | /* | |
81 | Include generated cdecl wrappers for stdcall gl*() functions in opengl32.dll | |
82 | ||
83 | OpenGL 1.2 and upward is treated as extensions, function address must | |
84 | found using wglGetProcAddress(), but also stdcall so still need wrappers... | |
85 | */ | |
86 | ||
87 | #include "generated_gl_thunks.c" |