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
|
/* $Id: pbutil.c,v 1.1 2002/10/05 18:30:13 brianp Exp $ */
/*
* OpenGL pbuffers utility functions.
*
* Brian Paul
* April 1997
* Updated on 5 October 2002
*/
#include <stdio.h>
#include <string.h>
#include "pbutil.h"
/*
* Test if we pixel buffers are available for a particular X screen.
* Input: dpy - the X display
* screen - screen number
* Return: 0 = pixel buffers not available.
* 1 = pixel buffers are available.
*/
int
QueryPbuffers(Display *dpy, int screen)
{
#if defined(GLX_SGIX_fbconfig) && defined(GLX_SGIX_pbuffer)
char *extensions;
extensions = (char *) glXQueryServerString(dpy, screen, GLX_EXTENSIONS);
if (!strstr(extensions,"GLX_SGIX_fbconfig")) {
return 0;
}
if (!strstr(extensions,"GLX_SGIX_pbuffer")) {
return 0;
}
return 1;
#else
return 0;
#endif
}
#ifdef GLX_SGIX_fbconfig
/*
* Print parameters for a GLXFBConfig to stdout.
* Input: dpy - the X display
* fbConfig - the fbconfig handle
* horizFormat - if true, print in horizontal format
*/
void
PrintFBConfigInfo(Display *dpy, GLXFBConfigSGIX fbConfig, Bool horizFormat)
{
int pbAttribs[] = {GLX_LARGEST_PBUFFER_SGIX, True,
GLX_PRESERVED_CONTENTS_SGIX, False,
None};
GLXPbufferSGIX pBuffer;
int width=2, height=2;
int bufferSize, level, doubleBuffer, stereo, auxBuffers;
int redSize, greenSize, blueSize, alphaSize;
int depthSize, stencilSize;
int accumRedSize, accumBlueSize, accumGreenSize, accumAlphaSize;
int sampleBuffers, samples;
int drawableType, renderType, xRenderable, xVisual, id;
int maxWidth, maxHeight, maxPixels;
int optWidth, optHeight;
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_BUFFER_SIZE, &bufferSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_LEVEL, &level);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_DOUBLEBUFFER, &doubleBuffer);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_STEREO, &stereo);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_AUX_BUFFERS, &auxBuffers);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_RED_SIZE, &redSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_GREEN_SIZE, &greenSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_BLUE_SIZE, &blueSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ALPHA_SIZE, &alphaSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_DEPTH_SIZE, &depthSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_STENCIL_SIZE, &stencilSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_RED_SIZE, &accumRedSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_GREEN_SIZE, &accumGreenSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_BLUE_SIZE, &accumBlueSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_ACCUM_ALPHA_SIZE, &accumAlphaSize);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_SAMPLE_BUFFERS_SGIS, &sampleBuffers);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_SAMPLES_SGIS, &samples);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_DRAWABLE_TYPE_SGIX, &drawableType);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_RENDER_TYPE_SGIX, &renderType);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_X_RENDERABLE_SGIX, &xRenderable);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_X_VISUAL_TYPE_EXT, &xVisual);
if (!xRenderable || !(drawableType & GLX_WINDOW_BIT_SGIX))
xVisual = -1;
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_FBCONFIG_ID_SGIX, &id);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_MAX_PBUFFER_WIDTH_SGIX,
&maxWidth);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_MAX_PBUFFER_HEIGHT_SGIX,
&maxHeight);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_MAX_PBUFFER_PIXELS_SGIX,
&maxPixels);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_OPTIMAL_PBUFFER_WIDTH_SGIX,
&optWidth);
glXGetFBConfigAttribSGIX(dpy, fbConfig, GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX,
&optHeight);
pBuffer = CreatePbuffer(dpy, fbConfig, width, height, pbAttribs);
if (horizFormat) {
printf("0x%03x ", id);
if (xVisual==GLX_STATIC_GRAY) printf("StaticGray ");
else if (xVisual==GLX_GRAY_SCALE) printf("GrayScale ");
else if (xVisual==GLX_STATIC_COLOR) printf("StaticColor ");
else if (xVisual==GLX_PSEUDO_COLOR) printf("PseudoColor ");
else if (xVisual==GLX_TRUE_COLOR) printf("TrueColor ");
else if (xVisual==GLX_DIRECT_COLOR) printf("DirectColor ");
else printf(" -none- ");
printf(" %3d %3d %s %s %s %2s ", bufferSize, level,
(renderType & GLX_RGBA_BIT_SGIX) ? "y" : "n",
(renderType & GLX_COLOR_INDEX_BIT_SGIX) ? "y" : "n",
doubleBuffer ? "y" : "n",
stereo ? "y" : "n");
printf("%2d %2d %2d %2d ", redSize, greenSize, blueSize, alphaSize);
printf("%2d %2d ", depthSize, stencilSize);
printf("%2d %2d %2d %2d", accumRedSize, accumGreenSize, accumBlueSize,
accumAlphaSize);
printf(" %2d %2d", sampleBuffers, samples);
printf(" %s", pBuffer ? "y" : "n");
printf("\n");
}
else {
printf("Id 0x%x\n", id);
printf(" Buffer Size: %d\n", bufferSize);
printf(" Level: %d\n", level);
printf(" Double Buffer: %s\n", doubleBuffer ? "yes" : "no");
printf(" Stereo: %s\n", stereo ? "yes" : "no");
printf(" Aux Buffers: %d\n", auxBuffers);
printf(" Red Size: %d\n", redSize);
printf(" Green Size: %d\n", greenSize);
printf(" Blue Size: %d\n", blueSize);
printf(" Alpha Size: %d\n", alphaSize);
printf(" Depth Size: %d\n", depthSize);
printf(" Stencil Size: %d\n", stencilSize);
printf(" Accum Red Size: %d\n", accumRedSize);
printf(" Accum Green Size: %d\n", accumGreenSize);
printf(" Accum Blue Size: %d\n", accumBlueSize);
printf(" Accum Alpha Size: %d\n", accumAlphaSize);
printf(" Sample Buffers: %d\n", sampleBuffers);
printf(" Samples/Pixel: %d\n", samples);
printf(" Drawable Types: ");
if (drawableType & GLX_WINDOW_BIT_SGIX) printf("Window ");
if (drawableType & GLX_PIXMAP_BIT_SGIX) printf("Pixmap ");
if (drawableType & GLX_PBUFFER_BIT_SGIX) printf("PBuffer");
printf("\n");
printf(" Render Types: ");
if (renderType & GLX_RGBA_BIT_SGIX) printf("RGBA ");
if (renderType & GLX_COLOR_INDEX_BIT_SGIX) printf("CI ");
printf("\n");
printf(" X Renderable: %s\n", xRenderable ? "yes" : "no");
/*
printf(" Max width: %d\n", maxWidth);
printf(" Max height: %d\n", maxHeight);
printf(" Max pixels: %d\n", maxPixels);
printf(" Optimum width: %d\n", optWidth);
printf(" Optimum height: %d\n", optHeight);
*/
printf(" Pbuffer: %s\n", pBuffer ? "yes" : "no");
}
if (pBuffer) {
glXDestroyGLXPbufferSGIX(dpy, pBuffer);
}
}
/* This is only used by CreatePbuffer() */
static int XErrorFlag = 0;
static int HandleXError( Display *dpy, XErrorEvent *event )
{
XErrorFlag = 1;
return 0;
}
/*
* Create a pixel buffer. We loop over the list of fbconfigs trying to create
* a pixel buffer. We return the first pixel buffer which we successfully
* create. This function hides the ugliness of dealing with BadAlloc X
* protocol errors.
*
* Input: dpy - the X display
* fbConfig - an FBConfig as returned by glXChooseFBConfigSGIX().
* width, height - size of pixel buffer to request, in pixels.
* pbAttribs - list of pixel buffer attributes as used by
* glXCreateGLXPbufferSGIX().
* Return: a pixel buffer or None.
*/
GLXPbufferSGIX
CreatePbuffer( Display *dpy, GLXFBConfigSGIX fbConfig,
int width, int height, int *pbAttribs )
{
int (*oldHandler)( Display *, XErrorEvent * );
GLXPbufferSGIX pBuffer = None;
/* Catch X protocol errors with our own error handler */
oldHandler = XSetErrorHandler( HandleXError );
XErrorFlag = 0;
pBuffer = glXCreateGLXPbufferSGIX(dpy, fbConfig, width, height, pbAttribs);
/* Restore original X error handler */
(void) XSetErrorHandler( oldHandler );
/* Return pbuffer (may be None) */
if (!XErrorFlag && pBuffer!=None) {
/*printf("config %d worked!\n", i);*/
return pBuffer;
}
else {
return None;
}
}
#endif /*GLX_SGIX_fbconfig*/
|
