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
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
|
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include "agg_rendering_buffer.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_ellipse.h"
#include "agg_trans_affine.h"
#include "agg_conv_transform.h"
#include "agg_scanline_u.h"
#include "agg_scanline_p.h"
#include "agg_image_accessors.h"
#include "agg_renderer_scanline.h"
#include "agg_span_allocator.h"
#include "agg_span_interpolator_linear.h"
#include "ctrl/agg_slider_ctrl.h"
#include "ctrl/agg_rbox_ctrl.h"
#include "ctrl/agg_cbox_ctrl.h"
#include "platform/agg_platform_support.h"
#include "agg_pixfmt_rgb.h"
#include "agg_span_image_filter_rgb.h"
#define span_image_filter span_image_filter_rgb
#define span_image_filter_nn span_image_filter_rgb_nn
#define span_image_filter_bilinear span_image_filter_rgb_bilinear_clip
#define span_image_filter_2x2 span_image_filter_rgb_2x2
#define pix_format agg::pix_format_bgr24
typedef agg::pixfmt_bgr24 pixfmt;
typedef agg::pixfmt_bgr24_pre pixfmt_pre;
typedef pixfmt::color_type color_type;
enum flip_y_e { flip_y = true };
// Uncomment this for more accurate timings.
// Well, it currently works well only on Windows, where there's
// high accuracy QueryPerformanceCounter is available. On Unix
// it uses regular clock() anyway, so, it won't work for short
// time periods and will give you totally wrong result (probably #INF).
#define AGG_ACCURATE_TIME
class the_application : public agg::platform_support
{
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_base<pixfmt_pre> renderer_base_pre;
agg::slider_ctrl<agg::rgba> m_radius;
agg::slider_ctrl<agg::rgba> m_step;
agg::rbox_ctrl<agg::rgba> m_filters;
agg::cbox_ctrl<agg::rgba> m_normalize;
agg::cbox_ctrl<agg::rgba> m_run;
agg::cbox_ctrl<agg::rgba> m_single_step;
agg::cbox_ctrl<agg::rgba> m_refresh;
double m_cur_angle;
int m_cur_filter;
int m_num_steps;
double m_num_pix;
double m_time1;
double m_time2;
public:
the_application(agg::pix_format_e format, bool flip_y) :
agg::platform_support(format, flip_y),
m_step (115, 5, 400, 11, !flip_y),
m_radius(115, 5+15, 400, 11+15, !flip_y),
m_filters(0.0, 0.0, 110.0, 210.0, !flip_y),
m_normalize (8.0, 215.0, "Normalize Filter", !flip_y),
m_run (8.0, 245.0, "RUN Test!", !flip_y),
m_single_step(8.0, 230.0, "Single Step", !flip_y),
m_refresh (8.0, 265.0, "Refresh", !flip_y),
m_cur_angle(0.0),
m_cur_filter(1),
m_num_steps(0),
m_num_pix(0.0),
m_time1(0),
m_time2(0)
{
add_ctrl(m_radius);
add_ctrl(m_step);
add_ctrl(m_filters);
add_ctrl(m_run);
add_ctrl(m_single_step);
add_ctrl(m_normalize);
add_ctrl(m_refresh);
m_run.text_size(7.5);
m_single_step.text_size(7.5);
m_normalize.text_size(7.5);
m_refresh.text_size(7.5);
m_normalize.status(true);
m_radius.label("Filter Radius=%.3f");
m_step.label("Step=%3.2f");
m_radius.range(2.0, 8.0);
m_radius.value(4.0);
m_step.range(1.0, 10.0);
m_step.value(5.0);
m_filters.add_item("simple (NN)");
m_filters.add_item("bilinear");
m_filters.add_item("bicubic");
m_filters.add_item("spline16");
m_filters.add_item("spline36");
m_filters.add_item("hanning");
m_filters.add_item("hamming");
m_filters.add_item("hermite");
m_filters.add_item("kaiser");
m_filters.add_item("quadric");
m_filters.add_item("catrom");
m_filters.add_item("gaussian");
m_filters.add_item("bessel");
m_filters.add_item("mitchell");
m_filters.add_item("sinc");
m_filters.add_item("lanczos");
m_filters.add_item("blackman");
m_filters.cur_item(1);
m_filters.border_width(0, 0);
m_filters.background_color(agg::rgba(0.0, 0.0, 0.0, 0.1));
m_filters.text_size(6.0);
m_filters.text_thickness(0.85);
}
virtual ~the_application()
{
}
virtual void on_draw()
{
pixfmt pixf(rbuf_window());
renderer_base rb(pixf);
rb.clear(agg::rgba(1.0, 1.0, 1.0));
rb.copy_from(rbuf_img(0), 0, 110, 35);
agg::rasterizer_scanline_aa<> ras;
agg::scanline_p8 sl;
char buf[64];
sprintf(buf, "NSteps=%d", m_num_steps);
agg::gsv_text t;
t.start_point(10.0, 295.0);
t.size(10.0);
t.text(buf);
agg::conv_stroke<agg::gsv_text> pt(t);
pt.width(1.5);
ras.add_path(pt);
agg::render_scanlines_aa_solid(ras, sl, rb, agg::rgba(0,0,0));
if(m_time1 != m_time2 && m_num_pix > 0.0)
{
#ifdef AGG_ACCURATE_TIME
sprintf(buf, "%3.2f Kpix/sec", m_num_pix / (m_time2 - m_time1));
#else
sprintf(buf, "%3.2f Kpix/sec", m_num_pix /
1000.0 /
(double(m_time2 - m_time1) / CLOCKS_PER_SEC));
#endif
t.start_point(10.0, 310.0);
t.text(buf);
ras.add_path(pt);
agg::render_scanlines_aa_solid(ras, sl, rb, agg::rgba(0,0,0));
}
if(m_filters.cur_item() >= 14)
{
agg::render_ctrl(ras, sl, rb, m_radius);
}
agg::render_ctrl(ras, sl, rb, m_step);
agg::render_ctrl(ras, sl, rb, m_filters);
agg::render_ctrl(ras, sl, rb, m_run);
agg::render_ctrl(ras, sl, rb, m_normalize);
agg::render_ctrl(ras, sl, rb, m_single_step);
agg::render_ctrl(ras, sl, rb, m_refresh);
}
void transform_image(double angle)
{
double width = rbuf_img(0).width();
double height = rbuf_img(0).height();
pixfmt pixf(rbuf_img(0));
pixfmt_pre pixf_pre(rbuf_img(0));
renderer_base rb(pixf);
renderer_base_pre rb_pre(pixf_pre);
rb.clear(agg::rgba(1.0, 1.0, 1.0));
agg::rasterizer_scanline_aa<> ras;
agg::scanline_u8 sl;
agg::span_allocator<color_type> sa;
agg::trans_affine src_mtx;
src_mtx *= agg::trans_affine_translation(-width/2.0, -height/2.0);
src_mtx *= agg::trans_affine_rotation(angle * agg::pi / 180.0);
src_mtx *= agg::trans_affine_translation(width/2.0, height/2.0);
agg::trans_affine img_mtx = src_mtx;
img_mtx.invert();
double r = width;
if(height < r) r = height;
r *= 0.5;
r -= 4.0;
agg::ellipse ell(width / 2.0,
height / 2.0,
r, r, 200);
agg::conv_transform<agg::ellipse> tr(ell, src_mtx);
m_num_pix += r * r * agg::pi;
typedef agg::span_interpolator_linear<> interpolator_type;
interpolator_type interpolator(img_mtx);
agg::image_filter_lut filter;
bool norm = m_normalize.status();
typedef agg::image_accessor_clip<pixfmt> source_type;
pixfmt pixf_img(rbuf_img(1));
source_type source(pixf_img, agg::rgba_pre(0,0,0,0));
switch(m_filters.cur_item())
{
case 0:
{
typedef agg::span_image_filter_nn<source_type, interpolator_type> span_gen_type;
span_gen_type sg(source, interpolator);
ras.add_path(tr);
agg::render_scanlines_aa(ras, sl, rb_pre, sa, sg);
}
break;
case 1:
{
typedef agg::span_image_filter_bilinear<pixfmt, interpolator_type> span_gen_type;
span_gen_type sg(pixf_img, agg::rgba_pre(0,0,0,0), interpolator);
ras.add_path(tr);
agg::render_scanlines_aa(ras, sl, rb_pre, sa, sg);
}
break;
case 5:
case 6:
case 7:
{
switch(m_filters.cur_item())
{
case 5: filter.calculate(agg::image_filter_hanning(), norm); break;
case 6: filter.calculate(agg::image_filter_hamming(), norm); break;
case 7: filter.calculate(agg::image_filter_hermite(), norm); break;
}
typedef agg::span_image_filter_2x2<source_type, interpolator_type> span_gen_type;
span_gen_type sg(source, interpolator, filter);
ras.add_path(tr);
agg::render_scanlines_aa(ras, sl, rb_pre, sa, sg);
}
break;
case 2:
case 3:
case 4:
case 8:
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
case 16:
{
switch(m_filters.cur_item())
{
case 2: filter.calculate(agg::image_filter_bicubic(), norm); break;
case 3: filter.calculate(agg::image_filter_spline16(), norm); break;
case 4: filter.calculate(agg::image_filter_spline36(), norm); break;
case 8: filter.calculate(agg::image_filter_kaiser(), norm); break;
case 9: filter.calculate(agg::image_filter_quadric(), norm); break;
case 10: filter.calculate(agg::image_filter_catrom(), norm); break;
case 11: filter.calculate(agg::image_filter_gaussian(), norm); break;
case 12: filter.calculate(agg::image_filter_bessel(), norm); break;
case 13: filter.calculate(agg::image_filter_mitchell(), norm); break;
case 14: filter.calculate(agg::image_filter_sinc(m_radius.value()), norm); break;
case 15: filter.calculate(agg::image_filter_lanczos(m_radius.value()), norm); break;
case 16: filter.calculate(agg::image_filter_blackman(m_radius.value()), norm); break;
}
typedef agg::span_image_filter<source_type, interpolator_type> span_gen_type;
span_gen_type sg(source, interpolator, filter);
ras.add_path(tr);
agg::render_scanlines_aa(ras, sl, rb_pre, sa, sg);
}
break;
}
}
void on_ctrl_change()
{
if(m_single_step.status())
{
m_cur_angle += m_step.value();
copy_img_to_img(1, 0);
transform_image(m_step.value());
m_num_steps++;
force_redraw();
m_single_step.status(false);
}
if(m_run.status())
{
#ifdef AGG_ACCURATE_TIME
start_timer();
m_time1 = m_time2 = elapsed_time();
#else
m_time1 = m_time2 = clock();
#endif
m_num_pix = 0.0;
wait_mode(false);
}
if(m_refresh.status() || m_filters.cur_item() != m_cur_filter)
{
#ifdef AGG_ACCURATE_TIME
start_timer();
m_time1 = m_time2 = 0;
#else
m_time1 = m_time2 = clock();
#endif
m_num_pix = 0.0;
m_cur_angle = 0.0;
copy_img_to_img(1, 2);
transform_image(0.0);
m_refresh.status(false);
m_cur_filter = m_filters.cur_item();
m_num_steps = 0;
force_redraw();
}
}
void on_idle()
{
if(m_run.status())
{
if(m_cur_angle < 360.0)
{
m_cur_angle += m_step.value();
copy_img_to_img(1, 0);
#ifdef AGG_ACCURATE_TIME
start_timer();
#endif
transform_image(m_step.value());
#ifdef AGG_ACCURATE_TIME
m_time2 += elapsed_time();
#endif
m_num_steps++;
}
else
{
m_cur_angle = 0.0;
#ifndef AGG_ACCURATE_TIME
m_time2 = clock();
#endif
wait_mode(true);
m_run.status(false);
}
force_redraw();
}
else
{
wait_mode(true);
}
}
};
int agg_main(int argc, char* argv[])
{
the_application app(pix_format, flip_y);
app.caption("Image transformation filters comparison");
const char* img_name = "spheres";
if(argc >= 2) img_name = argv[1];
if(!app.load_img(0, img_name))
{
char buf[256];
if(strcmp(img_name, "spheres") == 0)
{
sprintf(buf, "File not found: %s%s. Download http://www.antigrain.com/%s%s\n"
"or copy it from another directory if available.",
img_name, app.img_ext(), img_name, app.img_ext());
}
else
{
sprintf(buf, "File not found: %s%s", img_name, app.img_ext());
}
app.message(buf);
return 1;
}
app.copy_img_to_img(1, 0);
app.copy_img_to_img(2, 0);
app.transform_image(0.0);
unsigned w = app.rbuf_img(0).width() + 110;
unsigned h = app.rbuf_img(0).height() + 40;
if(w < 305) w = 305;
if(h < 325) h = 325;
if(app.init(w, h, 0))
{
return app.run();
}
return 0;
}
|
