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
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
|
/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
* Copyright (C) 2011 Red Hat, Inc.
*
* Authors: Carlos Garnacho <carlosg@gnome.org>
* Cosimo Cecchi <cosimoc@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <cairo-gobject.h>
#include <math.h>
#include "gtkborderimageprivate.h"
#include "gtkcssbordervalueprivate.h"
#include "gtkcssimagevalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkcssrepeatvalueprivate.h"
#include "gtkstylepropertyprivate.h"
/* this is in case round() is not provided by the compiler,
* such as in the case of C89 compilers, like MSVC
*/
#include "fallback-c89.c"
gboolean
_gtk_border_image_init (GtkBorderImage *image,
GtkStyleContext *context)
{
image->source = _gtk_css_image_value_get_image (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_IMAGE_SOURCE));
if (image->source == NULL)
return FALSE;
image->slice = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_IMAGE_SLICE);
image->width = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_IMAGE_WIDTH);
image->repeat = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_IMAGE_REPEAT);
return TRUE;
}
typedef struct _GtkBorderImageSliceSize GtkBorderImageSliceSize;
struct _GtkBorderImageSliceSize {
double offset;
double size;
};
static void
gtk_border_image_compute_border_size (GtkBorderImageSliceSize sizes[3],
double offset,
double area_size,
double start_border_width,
double end_border_width,
const GtkCssValue *start_border,
const GtkCssValue *end_border)
{
double start, end;
if (_gtk_css_number_value_get_unit (start_border) == GTK_CSS_NUMBER)
start = start_border_width * _gtk_css_number_value_get (start_border, 100);
else
start = _gtk_css_number_value_get (start_border, area_size);
if (_gtk_css_number_value_get_unit (end_border) == GTK_CSS_NUMBER)
end = end_border_width * _gtk_css_number_value_get (end_border, 100);
else
end = _gtk_css_number_value_get (end_border, area_size);
/* XXX: reduce vertical and horizontal by the same factor */
if (start + end > area_size)
{
start = start * area_size / (start + end);
end = end * area_size / (start + end);
}
sizes[0].offset = offset;
sizes[0].size = start;
sizes[1].offset = offset + start;
sizes[1].size = area_size - start - end;
sizes[2].offset = offset + area_size - end;
sizes[2].size = end;
}
static void
gtk_border_image_render_slice (cairo_t *cr,
cairo_surface_t *slice,
double slice_width,
double slice_height,
double x,
double y,
double width,
double height,
GtkCssRepeatStyle hrepeat,
GtkCssRepeatStyle vrepeat)
{
double hscale, vscale;
double xstep, ystep;
cairo_extend_t extend = CAIRO_EXTEND_PAD;
cairo_matrix_t matrix;
cairo_pattern_t *pattern;
/* We can't draw center tiles yet */
g_assert (hrepeat == GTK_CSS_REPEAT_STYLE_STRETCH || vrepeat == GTK_CSS_REPEAT_STYLE_STRETCH);
hscale = width / slice_width;
vscale = height / slice_height;
xstep = width;
ystep = height;
switch (hrepeat)
{
case GTK_CSS_REPEAT_STYLE_REPEAT:
extend = CAIRO_EXTEND_REPEAT;
hscale = vscale;
break;
case GTK_CSS_REPEAT_STYLE_SPACE:
{
double space, n;
extend = CAIRO_EXTEND_NONE;
hscale = vscale;
xstep = hscale * slice_width;
n = floor (width / xstep);
space = (width - n * xstep) / (n + 1);
xstep += space;
x += space;
width -= 2 * space;
}
break;
case GTK_CSS_REPEAT_STYLE_STRETCH:
break;
case GTK_CSS_REPEAT_STYLE_ROUND:
extend = CAIRO_EXTEND_REPEAT;
hscale = width / (slice_width * MAX (round (width / (slice_width * vscale)), 1));
break;
default:
g_assert_not_reached ();
break;
}
switch (vrepeat)
{
case GTK_CSS_REPEAT_STYLE_REPEAT:
extend = CAIRO_EXTEND_REPEAT;
vscale = hscale;
break;
case GTK_CSS_REPEAT_STYLE_SPACE:
{
double space, n;
extend = CAIRO_EXTEND_NONE;
vscale = hscale;
ystep = vscale * slice_height;
n = floor (height / ystep);
space = (height - n * ystep) / (n + 1);
ystep += space;
y += space;
height -= 2 * space;
}
break;
case GTK_CSS_REPEAT_STYLE_STRETCH:
break;
case GTK_CSS_REPEAT_STYLE_ROUND:
extend = CAIRO_EXTEND_REPEAT;
vscale = height / (slice_height * MAX (round (height / (slice_height * hscale)), 1));
break;
default:
g_assert_not_reached ();
break;
}
pattern = cairo_pattern_create_for_surface (slice);
cairo_matrix_init_translate (&matrix,
hrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? slice_width / 2 : 0,
vrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? slice_height / 2 : 0);
cairo_matrix_scale (&matrix, 1 / hscale, 1 / vscale);
cairo_matrix_translate (&matrix,
hrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? - width / 2 : 0,
vrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? - height / 2 : 0);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_pattern_set_extend (pattern, extend);
cairo_save (cr);
cairo_translate (cr, x, y);
for (y = 0; y < height; y += ystep)
{
for (x = 0; x < width; x += xstep)
{
cairo_save (cr);
cairo_translate (cr, x, y);
cairo_set_source (cr, pattern);
cairo_rectangle (cr, 0, 0, xstep, ystep);
cairo_fill (cr);
cairo_restore (cr);
}
}
cairo_restore (cr);
cairo_pattern_destroy (pattern);
}
static void
gtk_border_image_compute_slice_size (GtkBorderImageSliceSize sizes[3],
int surface_size,
int start_size,
int end_size)
{
sizes[0].size = MIN (start_size, surface_size);
sizes[0].offset = 0;
sizes[2].size = MIN (end_size, surface_size);
sizes[2].offset = surface_size - sizes[2].size;
sizes[1].size = MAX (0, surface_size - sizes[0].size - sizes[2].size);
sizes[1].offset = sizes[0].size;
}
void
_gtk_border_image_render (GtkBorderImage *image,
const double border_width[4],
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
cairo_surface_t *surface, *slice;
GtkBorderImageSliceSize vertical_slice[3], horizontal_slice[3];
GtkBorderImageSliceSize vertical_border[3], horizontal_border[3];
double source_width, source_height;
int h, v;
_gtk_css_image_get_concrete_size (image->source,
0, 0,
width, height,
&source_width, &source_height);
/* XXX: Optimize for (source_width == width && source_height == height) */
surface = _gtk_css_image_get_surface (image->source,
cairo_get_target (cr),
source_width, source_height);
gtk_border_image_compute_slice_size (horizontal_slice,
source_width,
_gtk_css_number_value_get (_gtk_css_border_value_get_left (image->slice), source_width),
_gtk_css_number_value_get (_gtk_css_border_value_get_right (image->slice), source_width));
gtk_border_image_compute_slice_size (vertical_slice,
source_height,
_gtk_css_number_value_get (_gtk_css_border_value_get_top (image->slice), source_height),
_gtk_css_number_value_get (_gtk_css_border_value_get_bottom (image->slice), source_height));
gtk_border_image_compute_border_size (horizontal_border,
x,
width,
border_width[GTK_CSS_LEFT],
border_width[GTK_CSS_RIGHT],
_gtk_css_border_value_get_left (image->width),
_gtk_css_border_value_get_right (image->width));
gtk_border_image_compute_border_size (vertical_border,
y,
height,
border_width[GTK_CSS_TOP],
border_width[GTK_CSS_BOTTOM],
_gtk_css_border_value_get_top (image->width),
_gtk_css_border_value_get_bottom(image->width));
for (v = 0; v < 3; v++)
{
if (vertical_slice[v].size == 0 ||
vertical_border[v].size == 0)
continue;
for (h = 0; h < 3; h++)
{
if (horizontal_slice[h].size == 0 ||
horizontal_border[h].size == 0)
continue;
if (h == 1 && v == 1)
continue;
slice = cairo_surface_create_for_rectangle (surface,
horizontal_slice[h].offset,
vertical_slice[v].offset,
horizontal_slice[h].size,
vertical_slice[v].size);
gtk_border_image_render_slice (cr,
slice,
horizontal_slice[h].size,
vertical_slice[v].size,
horizontal_border[h].offset,
vertical_border[v].offset,
horizontal_border[h].size,
vertical_border[v].size,
h == 1 ? _gtk_css_border_repeat_value_get_x (image->repeat) : GTK_CSS_REPEAT_STYLE_STRETCH,
v == 1 ? _gtk_css_border_repeat_value_get_y (image->repeat) : GTK_CSS_REPEAT_STYLE_STRETCH);
cairo_surface_destroy (slice);
}
}
cairo_surface_destroy (surface);
}
|
