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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "agg_rendering_buffer.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_path_storage.h"
#include "agg_trans_affine.h"
#include "agg_conv_transform.h"
#include "agg_conv_smooth_poly1.h"
#include "agg_scanline_p.h"
#include "agg_renderer_scanline.h"
#include "agg_span_allocator.h"
#include "agg_span_pattern_gray.h"
#include "agg_span_pattern_rgb.h"
#include "agg_span_pattern_rgba.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 };
//#define AGG_GRAY8
//#define AGG_BGR24
//#define AGG_RGB24
#define AGG_BGRA32
//#define AGG_RGBA32
//#define AGG_ARGB32
//#define AGG_ABGR32
//#define AGG_RGB565
//#define AGG_RGB555
#include "pixel_formats.h"
class the_application : public agg::platform_support
{
agg::slider_ctrl<agg::rgba> m_polygon_angle;
agg::slider_ctrl<agg::rgba> m_polygon_scale;
agg::slider_ctrl<agg::rgba> m_pattern_angle;
agg::slider_ctrl<agg::rgba> m_pattern_size;
agg::slider_ctrl<agg::rgba> m_pattern_alpha;
agg::cbox_ctrl<agg::rgba> m_rotate_polygon;
agg::cbox_ctrl<agg::rgba> m_rotate_pattern;
agg::cbox_ctrl<agg::rgba> m_tie_pattern;
double m_polygon_cx;
double m_polygon_cy;
double m_dx;
double m_dy;
int m_flag;
agg::int8u* m_pattern;
agg::rendering_buffer m_pattern_rbuf;
agg::rasterizer_scanline_aa<> m_ras;
agg::scanline_p8 m_sl;
agg::path_storage m_ps;
public:
//------------------------------------------------------------------------
the_application(agg::pix_format_e format, bool flip_y) :
agg::platform_support(format, flip_y),
m_polygon_angle(5, 5, 145, 12, !flip_y),
m_polygon_scale(5, 5+14, 145, 12+14, !flip_y),
m_pattern_angle(155, 5, 300, 12, !flip_y),
m_pattern_size (155, 5+14, 300, 12+14, !flip_y),
m_pattern_alpha(310, 5, 460, 12, !flip_y),
m_rotate_polygon(5, 5+14+14, "Rotate Polygon", !flip_y),
m_rotate_pattern(5, 5+14+14+14, "Rotate Pattern", !flip_y),
m_tie_pattern (155, 5+14+14, "Tie pattern to polygon", !flip_y),
m_flag(0),
m_pattern(0)
{
add_ctrl(m_polygon_angle);
add_ctrl(m_polygon_scale);
add_ctrl(m_pattern_angle);
add_ctrl(m_pattern_size);
add_ctrl(m_pattern_alpha);
add_ctrl(m_rotate_polygon);
add_ctrl(m_rotate_pattern);
add_ctrl(m_tie_pattern);
m_polygon_angle.label("Polygon Angle=%3.2f");
m_polygon_angle.range(-180.0, 180.0);
m_polygon_scale.label("Polygon Scale=%3.2f");
m_polygon_scale.range(0.1, 5.0);
m_polygon_scale.value(1.0);
m_pattern_angle.label("Pattern Angle=%3.2f");
m_pattern_angle.range(-180.0, 180.0);
m_pattern_size.label("Pattern Size=%3.2f");
m_pattern_size.range(10, 40);
m_pattern_size.value(30);
m_pattern_alpha.label("Background Alpha=%.2f");
m_pattern_alpha.value(0.1);
}
//------------------------------------------------------------------------
virtual ~the_application()
{
delete [] m_pattern;
}
//------------------------------------------------------------------------
void create_star(double xc, double yc,
double r1, double r2,
unsigned n, double start_angle = 0.0)
{
m_ps.remove_all();
unsigned i;
start_angle *= agg::pi / 180.0;
for(i = 0; i < n; i++)
{
double a = agg::pi * 2.0 * i / n - agg::pi / 2.0;
double dx = cos(a + start_angle);
double dy = sin(a + start_angle);
if(i & 1)
{
m_ps.line_to(xc + dx * r1, yc + dy * r1);
}
else
{
if(i) m_ps.line_to(xc + dx * r2, yc + dy * r2);
else m_ps.move_to(xc + dx * r2, yc + dy * r2);
}
}
m_ps.close_polygon();
}
//------------------------------------------------------------------------
void generate_pattern()
{
unsigned size = unsigned(m_pattern_size.value());
create_star(m_pattern_size.value() / 2.0,
m_pattern_size.value() / 2.0,
m_pattern_size.value() / 2.5,
m_pattern_size.value() / 6.0,
6,
m_pattern_angle.value());
agg::conv_smooth_poly1_curve<agg::path_storage> smooth(m_ps);
agg::conv_stroke<agg::conv_smooth_poly1_curve<agg::path_storage> > stroke(smooth);
smooth.smooth_value(1.0);
smooth.approximation_scale(4.0);
stroke.width(m_pattern_size.value() / 15.0);
delete [] m_pattern;
m_pattern = new agg::int8u[size * size * 4];
m_pattern_rbuf.attach(m_pattern, size, size, size*4);
pixfmt pixf(m_pattern_rbuf);
agg::renderer_base<pixfmt> rb(pixf);
agg::renderer_scanline_aa_solid<agg::renderer_base<pixfmt> > rs(rb);
rb.clear(agg::rgba_pre(0.4, 0.0, 0.1, m_pattern_alpha.value())); // Pattern background color
m_ras.add_path(smooth);
rs.color(agg::rgba8(110,130,50));
agg::render_scanlines(m_ras, m_sl, rs);
m_ras.add_path(stroke);
rs.color(agg::rgba8(0,50,80));
agg::render_scanlines(m_ras, m_sl, rs);
}
//------------------------------------------------------------------------
virtual void on_init()
{
m_polygon_cx = initial_width() / 2.0;
m_polygon_cy = initial_height() / 2.0;
generate_pattern();
}
//------------------------------------------------------------------------
virtual void on_draw()
{
double width = rbuf_window().width();
double height = rbuf_window().height();
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_base<pixfmt_pre> renderer_base_pre;
pixfmt pixf(rbuf_window());
pixfmt_pre pixf_pre(rbuf_window());
renderer_base rb(pixf);
renderer_base_pre rb_pre(pixf_pre);
rb.clear(agg::rgba(1.0, 1.0, 1.0));
agg::trans_affine polygon_mtx;
polygon_mtx *= agg::trans_affine_translation(-m_polygon_cx, -m_polygon_cy);
polygon_mtx *= agg::trans_affine_rotation(m_polygon_angle.value() * agg::pi / 180.0);
polygon_mtx *= agg::trans_affine_scaling(m_polygon_scale.value());
polygon_mtx *= agg::trans_affine_translation(m_polygon_cx, m_polygon_cy);
double r = initial_width() / 3.0 - 8.0;
create_star(m_polygon_cx, m_polygon_cy, r, r / 1.45, 14);
agg::conv_transform<agg::path_storage> tr(m_ps, polygon_mtx);
typedef agg::wrap_mode_reflect_auto_pow2 wrap_x_type;
typedef agg::wrap_mode_reflect_auto_pow2 wrap_y_type;
typedef agg::image_accessor_wrap<pixfmt,
wrap_x_type,
wrap_y_type> img_source_type;
typedef agg::span_pattern_rgba<img_source_type> span_gen_type;
unsigned offset_x = 0;
unsigned offset_y = 0;
if(m_tie_pattern.status())
{
offset_x = unsigned(width-m_polygon_cx);
offset_y = unsigned(height-m_polygon_cy);
}
agg::span_allocator<color_type> sa;
pixfmt img_pixf(m_pattern_rbuf);
img_source_type img_src(img_pixf);
span_gen_type sg(img_src, offset_x, offset_y);
// Alpha is meaningful for RGB only because RGBA has its own
sg.alpha(span_gen_type::value_type(m_pattern_alpha.value() * 255.0));
m_ras.add_path(tr);
agg::render_scanlines_aa(m_ras, m_sl, rb_pre, sa, sg);
agg::render_ctrl(m_ras, m_sl, rb, m_polygon_angle);
agg::render_ctrl(m_ras, m_sl, rb, m_polygon_scale);
agg::render_ctrl(m_ras, m_sl, rb, m_pattern_angle);
agg::render_ctrl(m_ras, m_sl, rb, m_pattern_size);
agg::render_ctrl(m_ras, m_sl, rb, m_pattern_alpha);
agg::render_ctrl(m_ras, m_sl, rb, m_rotate_polygon);
agg::render_ctrl(m_ras, m_sl, rb, m_rotate_pattern);
agg::render_ctrl(m_ras, m_sl, rb, m_tie_pattern);
}
//------------------------------------------------------------------------
virtual void on_mouse_button_down(int x, int y, unsigned flags)
{
if(flags & agg::mouse_left)
{
agg::trans_affine polygon_mtx;
polygon_mtx *= agg::trans_affine_translation(-m_polygon_cx, -m_polygon_cy);
polygon_mtx *= agg::trans_affine_rotation(m_polygon_angle.value() * agg::pi / 180.0);
polygon_mtx *= agg::trans_affine_scaling(m_polygon_scale.value(), m_polygon_scale.value());
polygon_mtx *= agg::trans_affine_translation(m_polygon_cx, m_polygon_cy);
double r = initial_width() / 3.0 - 8.0;
create_star(m_polygon_cx, m_polygon_cy, r, r / 1.45, 14);
agg::conv_transform<agg::path_storage> tr(m_ps, polygon_mtx);
m_ras.add_path(tr);
if(m_ras.hit_test(x, y))
{
m_dx = x - m_polygon_cx;
m_dy = y - m_polygon_cy;
m_flag = 1;
}
}
}
//------------------------------------------------------------------------
virtual void on_mouse_move(int x, int y, unsigned flags)
{
if(flags & agg::mouse_left)
{
if(m_flag)
{
m_polygon_cx = x - m_dx;
m_polygon_cy = y - m_dy;
force_redraw();
}
}
else
{
on_mouse_button_up(x, y, flags);
}
}
//------------------------------------------------------------------------
virtual void on_mouse_button_up(int x, int y, unsigned flags)
{
m_flag = 0;
}
//------------------------------------------------------------------------
virtual void on_ctrl_change()
{
if(m_rotate_polygon.status() || m_rotate_pattern.status())
{
wait_mode(false);
}
else
{
wait_mode(true);
}
generate_pattern();
force_redraw();
}
//------------------------------------------------------------------------
virtual void on_idle()
{
bool redraw = false;
if(m_rotate_polygon.status())
{
m_polygon_angle.value(m_polygon_angle.value() + 0.5);
if(m_polygon_angle.value() >= 180.0)
{
m_polygon_angle.value(m_polygon_angle.value() - 360.0);
}
redraw = true;
}
if(m_rotate_pattern.status())
{
m_pattern_angle.value(m_pattern_angle.value() - 0.5);
if(m_pattern_angle.value() <= -180.0)
{
m_pattern_angle.value(m_pattern_angle.value() + 360.0);
}
generate_pattern();
redraw = true;
}
if(redraw) force_redraw();
}
};
int agg_main(int argc, char* argv[])
{
the_application app(pix_format, flip_y);
app.caption("AGG Example: Pattern Filling");
if(app.init(640, 480, 0))
{
return app.run();
}
return 0;
}