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
|
/*
* Copyright © 2004 David Reveman, Peter Nilsson
*
* 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 names of
* David Reveman and Peter Nilsson not be used in advertising or
* publicity pertaining to distribution of the software without
* specific, written prior permission. David Reveman and Peter Nilsson
* makes no representations about the suitability of this software for
* any purpose. It is provided "as is" without express or implied warranty.
*
* DAVID REVEMAN AND PETER NILSSON DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DAVID REVEMAN AND
* PETER NILSSON 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.
*
* Authors: David Reveman <c99drn@cs.umu.se>
* Peter Nilsson <c99pnn@cs.umu.se>
*/
#ifdef HAVE_CONFIG_H
# include "../config.h"
#endif
#include "glitzint.h"
static void
_glitz_texture_find_best_target (unsigned int width, unsigned int height,
long int target_mask,
unsigned int *target)
{
*target = GLITZ_GL_TEXTURE_2D;
if ((!(target_mask & GLITZ_TEXTURE_TARGET_2D_MASK)) ||
(!glitz_uint_is_power_of_two (width)) ||
(!glitz_uint_is_power_of_two (height))) {
if (target_mask & GLITZ_TEXTURE_TARGET_RECTANGLE_MASK)
*target = GLITZ_GL_TEXTURE_RECTANGLE_EXT;
}
}
glitz_texture_t *
glitz_texture_generate (glitz_gl_proc_address_list_t *gl,
unsigned int width,
unsigned int height,
unsigned int texture_format,
long int target_mask)
{
glitz_texture_t *texture;
texture = (glitz_texture_t *) malloc (sizeof (glitz_texture_t));
if (texture == NULL)
return NULL;
texture->filter = -1;
texture->repeat = -1;
texture->width = width;
texture->height = height;
texture->format = texture_format;
texture->allocated = 0;
switch (texture->format) {
case GLITZ_GL_LUMINANCE_ALPHA:
texture->internal_format = GLITZ_GL_LUMINANCE_ALPHA;
break;
default:
texture->internal_format = GLITZ_GL_RGBA;
break;
}
if (!(target_mask & GLITZ_TEXTURE_TARGET_NPOT_MASK)) {
_glitz_texture_find_best_target (width, height,
target_mask, &texture->target);
if (texture->target == GLITZ_GL_TEXTURE_2D) {
glitz_uint_to_power_of_two (&texture->width);
glitz_uint_to_power_of_two (&texture->height);
}
} else
texture->target = GLITZ_GL_TEXTURE_2D;
gl->gen_textures (1, &texture->name);
if (texture->target == GLITZ_GL_TEXTURE_2D &&
texture->width == width && texture->height == height) {
texture->repeatable = 1;
texture->texcoord_width = texture->texcoord_height = 1.0;
} else {
texture->repeatable = 0;
if (texture->target == GLITZ_GL_TEXTURE_2D) {
texture->texcoord_width = (double) width / (double) texture->width;
texture->texcoord_height = (double) height / (double) texture->height;
} else {
texture->texcoord_width = texture->width;
texture->texcoord_height = texture->height;
}
}
return texture;
}
void
glitz_texture_allocate (glitz_gl_proc_address_list_t *gl,
glitz_texture_t *texture)
{
if (texture->allocated)
return;
glitz_texture_bind (gl, texture);
gl->tex_image_2d (texture->target, 0,
texture->internal_format,
texture->width, texture->height,
0, texture->format, GLITZ_GL_UNSIGNED_BYTE, NULL);
glitz_texture_unbind (gl, texture);
texture->allocated = 1;
}
void
glitz_texture_destroy (glitz_gl_proc_address_list_t *gl,
glitz_texture_t *texture)
{
gl->delete_textures (1, &texture->name);
free (texture);
}
void
glitz_texture_ensure_filter (glitz_gl_proc_address_list_t *gl,
glitz_texture_t *texture,
glitz_filter_t filter)
{
if (!texture->target)
return;
if (texture->filter != filter) {
switch (filter) {
case GLITZ_FILTER_FAST:
case GLITZ_FILTER_NEAREST:
gl->tex_parameter_i (texture->target,
GLITZ_GL_TEXTURE_MAG_FILTER, GLITZ_GL_NEAREST);
gl->tex_parameter_i (texture->target,
GLITZ_GL_TEXTURE_MIN_FILTER, GLITZ_GL_NEAREST);
break;
case GLITZ_FILTER_GOOD:
case GLITZ_FILTER_BEST:
case GLITZ_FILTER_BILINEAR:
gl->tex_parameter_i (texture->target,
GLITZ_GL_TEXTURE_MAG_FILTER, GLITZ_GL_LINEAR);
gl->tex_parameter_i (texture->target,
GLITZ_GL_TEXTURE_MIN_FILTER, GLITZ_GL_LINEAR);
break;
}
texture->filter = filter;
}
}
void
glitz_texture_ensure_repeat (glitz_gl_proc_address_list_t *gl,
glitz_texture_t *texture,
glitz_bool_t repeat)
{
if (!texture->target)
return;
if (texture->repeat != repeat) {
if (repeat) {
gl->tex_parameter_i(texture->target,
GLITZ_GL_TEXTURE_WRAP_S, GLITZ_GL_REPEAT);
gl->tex_parameter_i (texture->target,
GLITZ_GL_TEXTURE_WRAP_T, GLITZ_GL_REPEAT);
} else {
gl->tex_parameter_i (texture->target,
GLITZ_GL_TEXTURE_WRAP_S, GLITZ_GL_CLAMP_TO_EDGE);
gl->tex_parameter_i (texture->target,
GLITZ_GL_TEXTURE_WRAP_T, GLITZ_GL_CLAMP_TO_EDGE);
}
texture->repeat = repeat;
}
}
void
glitz_texture_bind (glitz_gl_proc_address_list_t *gl,
glitz_texture_t *texture)
{
gl->disable (GLITZ_GL_TEXTURE_RECTANGLE_EXT);
gl->disable (GLITZ_GL_TEXTURE_2D);
if (!texture->target)
return;
gl->enable (texture->target);
gl->bind_texture (texture->target, texture->name);
}
void
glitz_texture_unbind (glitz_gl_proc_address_list_t *gl,
glitz_texture_t *texture)
{
gl->bind_texture (texture->target, 0);
gl->disable (texture->target);
}
void
glitz_texture_copy_surface (glitz_texture_t *texture,
glitz_surface_t *surface,
glitz_region_box_t *region)
{
glitz_surface_push_current (surface, GLITZ_CN_SURFACE_DRAWABLE_CURRENT);
glitz_texture_bind (surface->gl, texture);
if (region->x1 < 0) region->x1 = 0;
if (region->y1 < 0) region->y1 = 0;
if (region->x2 > surface->width) region->x2 = surface->width;
if (region->y2 > surface->height) region->y2 = surface->height;
surface->gl->copy_tex_sub_image_2d (texture->target, 0,
region->x1, region->y1,
region->x1, region->y1,
region->x2 - region->x1,
region->y2 - region->y1);
surface->gl->flush ();
glitz_texture_unbind (surface->gl, texture);
glitz_surface_pop_current (surface);
}
|
