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#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_renderer_scanline.h"
#include "agg_pixfmt_rgba.h"
#include "agg_gamma_lut.h"
#include "agg_span_allocator.h"
#include "agg_span_image_filter_rgba.h"
#include "agg_span_interpolator_linear.h"
#include "agg_image_accessors.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"
enum flip_y_e { flip_y = true };
enum { l = 255 };
static agg::int8u g_image[] =
{
0,l,0,l, 0,0,l,l, l,l,l,l, l,0,0,l,
l,0,0,l, 0,0,0,l, l,l,l,l, l,l,l,l,
l,l,l,l, l,l,l,l, 0,0,l,l, l,0,0,l,
0,0,l,l, l,l,l,l, 0,0,0,l, 0,l,0,l
};
class the_application : public agg::platform_support
{
typedef agg::pixfmt_bgra32 pixfmt;
typedef agg::pixfmt_bgra32_pre pixfmt_pre;
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_base<pixfmt_pre> renderer_base_pre;
agg::slider_ctrl<agg::rgba> m_gamma;
agg::slider_ctrl<agg::rgba> m_radius;
agg::rbox_ctrl<agg::rgba> m_filters;
agg::cbox_ctrl<agg::rgba> m_normalize;
double m_cur_angle;
int m_cur_filter;
int m_num_steps;
double m_num_pix;
clock_t m_time1;
clock_t m_time2;
public:
the_application(agg::pix_format_e format, bool flip_y) :
agg::platform_support(format, flip_y),
m_gamma (115, 5, 500-5, 11, !flip_y),
m_radius(115, 5+15, 500-5, 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_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_gamma);
add_ctrl(m_radius);
add_ctrl(m_filters);
add_ctrl(m_normalize);
m_normalize.text_size(7.5);
m_normalize.status(true);
m_radius.label("Filter Radius=%.3f");
m_radius.range(2.0, 8.0);
m_radius.value(4.0);
m_gamma.label("Gamma=%.3f");
m_gamma.range(0.5, 3.0);
m_gamma.value(1.0);
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_u8 sl;
agg::rendering_buffer img_rbuf(g_image, 4, 4, 4*4);
double para[] = { 200, 40, 200+300, 40, 200+300, 40+300, 200, 40+300 };
agg::trans_affine img_mtx(para, 0,0,4,4);
typedef agg::span_interpolator_linear<> interpolator_type;
interpolator_type interpolator(img_mtx);
agg::span_allocator<agg::rgba8> sa;
pixfmt img_pixf(img_rbuf);
typedef agg::image_accessor_clone<pixfmt> img_source_type;
img_source_type source(img_pixf);
ras.reset();
ras.move_to_d(para[0], para[1]);
ras.line_to_d(para[2], para[3]);
ras.line_to_d(para[4], para[5]);
ras.line_to_d(para[6], para[7]);
switch(m_filters.cur_item())
{
case 0:
{
typedef agg::span_image_filter_rgba_nn<img_source_type,
interpolator_type> span_gen_type;
span_gen_type sg(source, interpolator);
agg::render_scanlines_aa(ras, sl, rb, sa, sg);
}
break;
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
case 16:
{
agg::image_filter_lut filter;
bool norm = m_normalize.status();
switch(m_filters.cur_item())
{
case 1: filter.calculate(agg::image_filter_bilinear(), norm); break;
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 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;
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_rgba<img_source_type,
interpolator_type> span_gen_type;
span_gen_type sg(source, interpolator, filter);
agg::render_scanlines_aa(ras, sl, rb, sa, sg);
agg::gamma_lut<agg::int8u, agg::int8u, 8, 8> gamma(m_gamma.value());
pixf.apply_gamma_inv(gamma);
double x_start = 5.0;
double x_end = 195.0;
double y_start = 235.0;
double y_end = initial_height() - 5.0;
double x_center = (x_start + x_end) / 2;
agg::path_storage p;
agg::conv_stroke<agg::path_storage> stroke(p);
stroke.width(0.8);
unsigned i;
for(i = 0; i <= 16; i++)
{
double x = x_start + (x_end - x_start) * i / 16.0;
p.remove_all();
p.move_to(x+0.5, y_start);
p.line_to(x+0.5, y_end);
ras.add_path(stroke);
agg::render_scanlines_aa_solid(ras, sl, rb,
agg::rgba8(0, 0, 0, i == 8 ? 255 : 100));
}
double ys = y_start + (y_end - y_start) / 6.0;
p.remove_all();
p.move_to(x_start, ys);
p.line_to(x_end, ys);
ras.add_path(stroke);
agg::render_scanlines_aa_solid(ras, sl, rb, agg::rgba8(0, 0, 0));
double radius = filter.radius();
unsigned n = unsigned(radius * 256 * 2);
double dx = (x_end - x_start) * radius / 8.0;
double dy = y_end - ys;
const agg::int16* weights = filter.weight_array();
double xs = (x_end + x_start)/2.0 - (filter.diameter() * (x_end - x_start) / 32.0);
unsigned nn = filter.diameter() * 256;
p.remove_all();
p.move_to(xs+0.5, ys + dy * weights[0] / agg::image_filter_scale);
for(i = 1; i < nn; i++)
{
p.line_to(xs + dx * i / n + 0.5,
ys + dy * weights[i] / agg::image_filter_scale);
}
ras.add_path(stroke);
agg::render_scanlines_aa_solid(ras, sl, rb, agg::rgba8(100, 0, 0));
}
break;
}
agg::render_ctrl(ras, sl, rb, m_gamma);
if(m_filters.cur_item() >= 14)
{
agg::render_ctrl(ras, sl, rb, m_radius);
}
agg::render_ctrl(ras, sl, rb, m_filters);
agg::render_ctrl(ras, sl, rb, m_normalize);
}
};
int agg_main(int argc, char* argv[])
{
the_application app(agg::pix_format_bgra32, flip_y);
app.caption("Image transformation filters comparison");
if(app.init(500, 340, 0))
{
return app.run();
}
return 0;
}
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