walkero
/
agg
1
0
Fork 0
Code Issues Pull Requests 1 Projects Releases Wiki Activity
agg/examples/image_filters.cpp

429 lines
13 KiB
C++
Raw Blame History

#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"
#define AGG_BGR24
//#define AGG_BGR96
#include "pixel_formats.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
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 the ../art directory.",
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;
}
Reference in New Issue View Git Blame Copy Permalink