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
|
/*
* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice including the dates of first publication and
* either this permission notice or a reference to
* http://oss.sgi.com/projects/FreeB/
* shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of Silicon Graphics, Inc.
* shall not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization from
* Silicon Graphics, Inc.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "glxserver.h"
#include "glxutil.h"
#include "unpack.h"
#include "indirect_dispatch.h"
#include <GL/gl.h>
#include <pixmapstr.h>
#include <windowstr.h>
#include <dixfontstr.h>
/*
** Make a single GL bitmap from a single X glyph
*/
static int
__glXMakeBitmapFromGlyph(FontPtr font, CharInfoPtr pci)
{
int i, j;
int widthPadded; /* width of glyph in bytes, as padded by X */
int allocBytes; /* bytes to allocate to store bitmap */
int w; /* width of glyph in bits */
int h; /* height of glyph */
register unsigned char *pglyph;
register unsigned char *p;
unsigned char *allocbuf;
#define __GL_CHAR_BUF_SIZE 2048
unsigned char buf[__GL_CHAR_BUF_SIZE];
w = GLYPHWIDTHPIXELS(pci);
h = GLYPHHEIGHTPIXELS(pci);
widthPadded = GLYPHWIDTHBYTESPADDED(pci);
/*
** Use the local buf if possible, otherwise malloc.
*/
allocBytes = widthPadded * h;
if (allocBytes <= __GL_CHAR_BUF_SIZE) {
p = buf;
allocbuf = 0;
}
else {
p = (unsigned char *) malloc(allocBytes);
if (!p)
return BadAlloc;
allocbuf = p;
}
/*
** We have to reverse the picture, top to bottom
*/
pglyph = FONTGLYPHBITS(FONTGLYPHS(font), pci) + (h - 1) * widthPadded;
for (j = 0; j < h; j++) {
for (i = 0; i < widthPadded; i++) {
p[i] = pglyph[i];
}
pglyph -= widthPadded;
p += widthPadded;
}
glBitmap(w, h, -pci->metrics.leftSideBearing, pci->metrics.descent,
pci->metrics.characterWidth, 0, allocbuf ? allocbuf : buf);
free(allocbuf);
return Success;
#undef __GL_CHAR_BUF_SIZE
}
/*
** Create a GL bitmap for each character in the X font. The bitmap is stored
** in a display list.
*/
static int
MakeBitmapsFromFont(FontPtr pFont, int first, int count, int list_base)
{
unsigned long i, nglyphs;
CARD8 chs[2]; /* the font index we are going after */
CharInfoPtr pci;
int rv; /* return value */
int encoding = (FONTLASTROW(pFont) == 0) ? Linear16Bit : TwoD16Bit;
glPixelStorei(GL_UNPACK_SWAP_BYTES, FALSE);
glPixelStorei(GL_UNPACK_LSB_FIRST, BITMAP_BIT_ORDER == LSBFirst);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_ALIGNMENT, GLYPHPADBYTES);
for (i = 0; i < count; i++) {
chs[0] = (first + i) >> 8; /* high byte is first byte */
chs[1] = first + i;
(*pFont->get_glyphs) (pFont, 1, chs, (FontEncoding) encoding,
&nglyphs, &pci);
/*
** Define a display list containing just a glBitmap() call.
*/
glNewList(list_base + i, GL_COMPILE);
if (nglyphs) {
rv = __glXMakeBitmapFromGlyph(pFont, pci);
if (rv) {
return rv;
}
}
glEndList();
}
return Success;
}
/************************************************************************/
int
__glXDisp_UseXFont(__GLXclientState * cl, GLbyte * pc)
{
ClientPtr client = cl->client;
xGLXUseXFontReq *req;
FontPtr pFont;
GLuint currentListIndex;
__GLXcontext *cx;
int error;
req = (xGLXUseXFontReq *) pc;
cx = __glXForceCurrent(cl, req->contextTag, &error);
if (!cx) {
return error;
}
glGetIntegerv(GL_LIST_INDEX, (GLint *) ¤tListIndex);
if (currentListIndex != 0) {
/*
** A display list is currently being made. It is an error
** to try to make a font during another lists construction.
*/
client->errorValue = cx->id;
return __glXError(GLXBadContextState);
}
/*
** Font can actually be either the ID of a font or the ID of a GC
** containing a font.
*/
error = dixLookupFontable(&pFont, req->font, client, DixReadAccess);
if (error != Success)
return error;
return MakeBitmapsFromFont(pFont, req->first, req->count, req->listBase);
}
|
