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
|
/*
* Copyright © 2014 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include "glamor_priv.h"
#include "glamor_font.h"
#include <dixfontstr.h>
static int glamor_font_generation;
static int glamor_font_private_index;
static int glamor_font_screen_count;
glamor_font_t *
glamor_font_get(ScreenPtr screen, FontPtr font)
{
glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
glamor_font_t *privates;
glamor_font_t *glamor_font;
int overall_width, overall_height;
int num_rows;
int num_cols;
int glyph_width_pixels;
int glyph_width_bytes;
int glyph_height;
int row, col;
unsigned char c[2];
CharInfoPtr glyph;
unsigned long count;
if (glamor_priv->glsl_version < 130)
return NULL;
privates = FontGetPrivate(font, glamor_font_private_index);
if (!privates) {
privates = calloc(glamor_font_screen_count, sizeof (glamor_font_t));
if (!privates)
return NULL;
FontSetPrivate(font, glamor_font_private_index, privates);
}
glamor_font = &privates[screen->myNum];
if (glamor_font->realized)
return glamor_font;
glamor_font->realized = TRUE;
/* Figure out how many glyphs are in the font */
num_cols = font->info.lastCol - font->info.firstCol + 1;
num_rows = font->info.lastRow - font->info.firstRow + 1;
/* Figure out the size of each glyph */
glyph_width_pixels = font->info.maxbounds.rightSideBearing - font->info.minbounds.leftSideBearing;
glyph_height = font->info.maxbounds.ascent + font->info.maxbounds.descent;
glyph_width_bytes = (glyph_width_pixels + 7) >> 3;
glamor_font->glyph_width_pixels = glyph_width_pixels;
glamor_font->glyph_width_bytes = glyph_width_bytes;
glamor_font->glyph_height = glyph_height;
overall_width = glyph_width_bytes * num_cols;
overall_height = glyph_height * num_rows;
/* Check whether the font has a default character */
c[0] = font->info.lastRow + 1;
c[1] = font->info.lastCol + 1;
(*font->get_glyphs)(font, 1, c, TwoD16Bit, &count, &glyph);
glamor_font->default_char = count ? glyph : NULL;
glamor_font->default_row = font->info.defaultCh >> 8;
glamor_font->default_col = font->info.defaultCh;
glamor_priv = glamor_get_screen_private(screen);
glamor_make_current(glamor_priv);
glGenTextures(1, &glamor_font->texture_id);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, glamor_font->texture_id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
/* Allocate storage */
glTexImage2D(GL_TEXTURE_2D, 0, GL_R8UI, overall_width, overall_height,
0, GL_RED_INTEGER, GL_UNSIGNED_BYTE, NULL);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
/* Paint all of the glyphs */
for (row = 0; row < num_rows; row++) {
for (col = 0; col < num_cols; col++) {
c[0] = row + font->info.firstRow;
c[1] = col + font->info.firstCol;
(*font->get_glyphs)(font, 1, c, TwoD16Bit, &count, &glyph);
if (count)
glTexSubImage2D(GL_TEXTURE_2D, 0, col * glyph_width_bytes, row * glyph_height,
GLYPHWIDTHBYTES(glyph), GLYPHHEIGHTPIXELS(glyph),
GL_RED_INTEGER, GL_UNSIGNED_BYTE, glyph->bits);
}
}
return glamor_font;
}
static Bool
glamor_realize_font(ScreenPtr screen, FontPtr font)
{
return TRUE;
}
static Bool
glamor_unrealize_font(ScreenPtr screen, FontPtr font)
{
glamor_screen_private *glamor_priv;
glamor_font_t *privates = FontGetPrivate(font, glamor_font_private_index);
glamor_font_t *glamor_font;
int s;
if (!privates)
return TRUE;
glamor_font = &privates[screen->myNum];
if (!glamor_font->realized)
return TRUE;
/* Unrealize the font, freeing the allocated texture */
glamor_font->realized = FALSE;
glamor_priv = glamor_get_screen_private(screen);
glamor_make_current(glamor_priv);
glDeleteTextures(1, &glamor_font->texture_id);
/* Check to see if all of the screens are done with this font
* and free the private when that happens
*/
for (s = 0; s < glamor_font_screen_count; s++)
if (privates[s].realized)
return TRUE;
free(privates);
FontSetPrivate(font, glamor_font_private_index, NULL);
return TRUE;
}
Bool
glamor_font_init(ScreenPtr screen)
{
glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
if (glamor_priv->glsl_version < 130)
return TRUE;
if (glamor_font_generation != serverGeneration) {
glamor_font_private_index = AllocateFontPrivateIndex();
if (glamor_font_private_index == -1)
return FALSE;
glamor_font_screen_count = 0;
glamor_font_generation = serverGeneration;
}
if (screen->myNum >= glamor_font_screen_count)
glamor_font_screen_count = screen->myNum + 1;
screen->RealizeFont = glamor_realize_font;
screen->UnrealizeFont = glamor_unrealize_font;
return TRUE;
}
|
