1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
|
unit glx;
{
$Id: glx.pas,v 1.3 2006/11/20 21:20:59 savage Exp $
Translation of the Mesa GLX headers for FreePascal
Copyright (C) 1999 Sebastian Guenther
Mesa 3-D graphics library
Version: 3.0
Copyright (C) 1995-1998 Brian Paul
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
}
// {$MODE delphi} // objfpc would not work because of direct proc var assignments
{You have to enable Macros (compiler switch "-Sm") for compiling this unit!
This is necessary for supporting different platforms with different calling
conventions via a single unit.}
{
$Log: glx.pas,v $
Revision 1.3 2006/11/20 21:20:59 savage
Updated to work in MacOS X
Revision 1.2 2006/04/18 18:38:33 savage
fixed boolean test - thanks grudzio
Revision 1.1 2004/03/30 21:53:55 savage
Moved to it's own folder.
Revision 1.5 2004/02/15 22:48:35 savage
More FPC and FreeBSD support changes.
Revision 1.4 2004/02/14 22:36:29 savage
Fixed inconsistencies of using LoadLibrary and LoadModule.
Now all units make use of LoadModule rather than LoadLibrary and other dynamic proc procedures.
Revision 1.3 2004/02/14 00:23:39 savage
As UNIX is defined in jedi-sdl.inc this will be used to check linux compatability as well. Units have been changed to reflect this change.
Revision 1.2 2004/02/14 00:09:19 savage
Changed uses to now make use of moduleloader.pas rather than dllfuncs.pas
Revision 1.1 2004/02/05 00:08:19 savage
Module 1.0 release
Revision 1.1 2003/05/11 13:18:03 savage
Newest OpenGL Headers For Delphi, Kylix and FPC
Revision 1.1 2002/10/13 13:57:31 sg
* Finally, the new units are available: Match the C headers more closely;
support for OpenGL extensions, and much more. Based on the Delphi units
by Tom Nuydens of delphi3d.net
}
interface
{$I jedi-sdl.inc}
{$IFDEF UNIX}
uses
{$IFDEF FPC}
x,
xlib,
xutil;
{$ELSE}
xlib;
{$ENDIF}
{$DEFINE HasGLX} // Activate GLX stuff
{$ELSE}
{$MESSAGE Unsupported platform.}
{$ENDIF}
{$IFNDEF HasGLX}
{$MESSAGE GLX not present on this platform.}
{$ENDIF}
// =======================================================
// Unit specific extensions
// =======================================================
// Note: Requires that the GL library has already been initialized
function InitGLX: Boolean;
var
GLXDumpUnresolvedFunctions,
GLXInitialized: Boolean;
// =======================================================
// GLX consts, types and functions
// =======================================================
// Tokens for glXChooseVisual and glXGetConfig:
const
GLX_USE_GL = 1;
GLX_BUFFER_SIZE = 2;
GLX_LEVEL = 3;
GLX_RGBA = 4;
GLX_DOUBLEBUFFER = 5;
GLX_STEREO = 6;
GLX_AUX_BUFFERS = 7;
GLX_RED_SIZE = 8;
GLX_GREEN_SIZE = 9;
GLX_BLUE_SIZE = 10;
GLX_ALPHA_SIZE = 11;
GLX_DEPTH_SIZE = 12;
GLX_STENCIL_SIZE = 13;
GLX_ACCUM_RED_SIZE = 14;
GLX_ACCUM_GREEN_SIZE = 15;
GLX_ACCUM_BLUE_SIZE = 16;
GLX_ACCUM_ALPHA_SIZE = 17;
// GLX_EXT_visual_info extension
GLX_X_VISUAL_TYPE_EXT = $22;
GLX_TRANSPARENT_TYPE_EXT = $23;
GLX_TRANSPARENT_INDEX_VALUE_EXT = $24;
GLX_TRANSPARENT_RED_VALUE_EXT = $25;
GLX_TRANSPARENT_GREEN_VALUE_EXT = $26;
GLX_TRANSPARENT_BLUE_VALUE_EXT = $27;
GLX_TRANSPARENT_ALPHA_VALUE_EXT = $28;
// Error codes returned by glXGetConfig:
GLX_BAD_SCREEN = 1;
GLX_BAD_ATTRIBUTE = 2;
GLX_NO_EXTENSION = 3;
GLX_BAD_VISUAL = 4;
GLX_BAD_CONTEXT = 5;
GLX_BAD_VALUE = 6;
GLX_BAD_ENUM = 7;
// GLX 1.1 and later:
GLX_VENDOR = 1;
GLX_VERSION = 2;
GLX_EXTENSIONS = 3;
// GLX_visual_info extension
GLX_TRUE_COLOR_EXT = $8002;
GLX_DIRECT_COLOR_EXT = $8003;
GLX_PSEUDO_COLOR_EXT = $8004;
GLX_STATIC_COLOR_EXT = $8005;
GLX_GRAY_SCALE_EXT = $8006;
GLX_STATIC_GRAY_EXT = $8007;
GLX_NONE_EXT = $8000;
GLX_TRANSPARENT_RGB_EXT = $8008;
GLX_TRANSPARENT_INDEX_EXT = $8009;
type
// From XLib:
{$IFNDEF FPC}
TXID = XID;
{$ENDIF}
XPixmap = TXID;
XFont = TXID;
XColormap = TXID;
GLXContext = Pointer;
GLXPixmap = TXID;
GLXDrawable = TXID;
GLXContextID = TXID;
var
glXChooseVisual: function(dpy: PDisplay; screen: Integer; var attribList: Integer): PXVisualInfo; cdecl;
glXCreateContext: function(dpy: PDisplay; vis: PXVisualInfo; shareList: GLXContext; direct: Boolean): GLXContext; cdecl;
glXDestroyContext: procedure(dpy: PDisplay; ctx: GLXContext); cdecl;
glXMakeCurrent: function(dpy: PDisplay; drawable: GLXDrawable; ctx: GLXContext): Boolean; cdecl;
glXCopyContext: procedure(dpy: PDisplay; src, dst: GLXContext; mask: LongWord); cdecl;
glXSwapBuffers: procedure(dpy: PDisplay; drawable: GLXDrawable); cdecl;
glXCreateGLXPixmap: function(dpy: PDisplay; visual: PXVisualInfo; pixmap: XPixmap): GLXPixmap; cdecl;
glXDestroyGLXPixmap: procedure(dpy: PDisplay; pixmap: GLXPixmap); cdecl;
glXQueryExtension: function(dpy: PDisplay; var errorb, event: Integer): Boolean; cdecl;
glXQueryVersion: function(dpy: PDisplay; var maj, min: Integer): Boolean; cdecl;
glXIsDirect: function(dpy: PDisplay; ctx: GLXContext): Boolean; cdecl;
glXGetConfig: function(dpy: PDisplay; visual: PXVisualInfo; attrib: Integer; var value: Integer): Integer; cdecl;
glXGetCurrentContext: function: GLXContext; cdecl;
glXGetCurrentDrawable: function: GLXDrawable; cdecl;
glXWaitGL: procedure; cdecl;
glXWaitX: procedure; cdecl;
glXUseXFont: procedure(font: XFont; first, count, list: Integer); cdecl;
// GLX 1.1 and later
glXQueryExtensionsString: function(dpy: PDisplay; screen: Integer): PChar; cdecl;
glXQueryServerString: function(dpy: PDisplay; screen, name: Integer): PChar; cdecl;
glXGetClientString: function(dpy: PDisplay; name: Integer): PChar; cdecl;
// Mesa GLX Extensions
glXCreateGLXPixmapMESA: function(dpy: PDisplay; visual: PXVisualInfo; pixmap: XPixmap; cmap: XColormap): GLXPixmap; cdecl;
glXReleaseBufferMESA: function(dpy: PDisplay; d: GLXDrawable): Boolean; cdecl;
glXCopySubBufferMESA: procedure(dpy: PDisplay; drawbale: GLXDrawable; x, y, width, height: Integer); cdecl;
glXGetVideoSyncSGI: function(var counter: LongWord): Integer; cdecl;
glXWaitVideoSyncSGI: function(divisor, remainder: Integer; var count: LongWord): Integer; cdecl;
// =======================================================
//
// =======================================================
implementation
uses
{$IFNDEF __GPC__}
SysUtils,
{$ENDIF}
moduleloader;
(* {$LINKLIB m} *)
var
libGLX: TModuleHandle;
function InitGLXFromLibrary( dll : PChar ): Boolean;
begin
Result := False;
if not LoadModule( libGLX, dll ) then
exit;
glXChooseVisual := GetModuleSymbol(libglx, 'glXChooseVisual');
glXCreateContext := GetModuleSymbol(libglx, 'glXCreateContext');
glXDestroyContext := GetModuleSymbol(libglx, 'glXDestroyContext');
glXMakeCurrent := GetModuleSymbol(libglx, 'glXMakeCurrent');
glXCopyContext := GetModuleSymbol(libglx, 'glXCopyContext');
glXSwapBuffers := GetModuleSymbol(libglx, 'glXSwapBuffers');
glXCreateGLXPixmap := GetModuleSymbol(libglx, 'glXCreateGLXPixmap');
glXDestroyGLXPixmap := GetModuleSymbol(libglx, 'glXDestroyGLXPixmap');
glXQueryExtension := GetModuleSymbol(libglx, 'glXQueryExtension');
glXQueryVersion := GetModuleSymbol(libglx, 'glXQueryVersion');
glXIsDirect := GetModuleSymbol(libglx, 'glXIsDirect');
glXGetConfig := GetModuleSymbol(libglx, 'glXGetConfig');
glXGetCurrentContext := GetModuleSymbol(libglx, 'glXGetCurrentContext');
glXGetCurrentDrawable := GetModuleSymbol(libglx, 'glXGetCurrentDrawable');
glXWaitGL := GetModuleSymbol(libglx, 'glXWaitGL');
glXWaitX := GetModuleSymbol(libglx, 'glXWaitX');
glXUseXFont := GetModuleSymbol(libglx, 'glXUseXFont');
// GLX 1.1 and later
glXQueryExtensionsString := GetModuleSymbol(libglx, 'glXQueryExtensionsString');
glXQueryServerString := GetModuleSymbol(libglx, 'glXQueryServerString');
glXGetClientString := GetModuleSymbol(libglx, 'glXGetClientString');
// Mesa GLX Extensions
glXCreateGLXPixmapMESA := GetModuleSymbol(libglx, 'glXCreateGLXPixmapMESA');
glXReleaseBufferMESA := GetModuleSymbol(libglx, 'glXReleaseBufferMESA');
glXCopySubBufferMESA := GetModuleSymbol(libglx, 'glXCopySubBufferMESA');
glXGetVideoSyncSGI := GetModuleSymbol(libglx, 'glXGetVideoSyncSGI');
glXWaitVideoSyncSGI := GetModuleSymbol(libglx, 'glXWaitVideoSyncSGI');
GLXInitialized := True;
Result := True;
end;
function InitGLX: Boolean;
begin
Result := InitGLXFromLibrary('libGL.so') or
InitGLXFromLibrary('libGL.so.1') or
InitGLXFromLibrary('libMesaGL.so') or
InitGLXFromLibrary('libMesaGL.so.3');
end;
initialization
InitGLX;
finalization
UnloadModule(libGLX);
end.
|
