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#include "agg_basics.h"
#include "agg_rendering_buffer.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_scanline_u.h"
#include "agg_renderer_scanline.h"
#include "agg_pixfmt_rgb.h"
#include "agg_trans_affine.h"
#include "agg_conv_transform.h"
#include "agg_conv_segmentator.h"
#include "platform/agg_platform_support.h"
#include "ctrl/agg_slider_ctrl.h"
#include "ctrl/agg_cbox_ctrl.h"
enum flip_y_e { flip_y = true };
namespace agg
{
template<class ColorT, class Ctrl, class Pipeline> class transformed_control
{
public:
transformed_control(Ctrl& ctrl, Pipeline& pl) :
m_ctrl(ctrl),
m_pipeline(pl)
{}
unsigned num_paths() { return m_ctrl.num_paths(); }
void rewind(unsigned path_id) { m_pipeline.rewind(path_id); }
unsigned vertex(double* x, double* y) { return m_pipeline.vertex(x, y); }
const ColorT& color(unsigned i) const { return m_ctrl.color(i); }
private:
Ctrl& m_ctrl;
Pipeline& m_pipeline;
};
class trans_polar
{
public:
trans_polar() :
m_base_angle(1.0),
m_base_scale(1.0),
m_base_x(0.0),
m_base_y(0.0),
m_translation_x(0.0),
m_translation_y(0.0),
m_spiral(0.0)
{}
void base_scale(double v) { m_base_scale = v; }
void full_circle(double v) { m_base_angle = 2.0 * pi / v; }
void base_offset(double dx, double dy) { m_base_x = dx; m_base_y = dy; }
void translation(double dx, double dy) { m_translation_x = dx; m_translation_y = dy;}
void spiral(double v) { m_spiral = v; }
void transform(double* x, double* y) const
{
double x1 = (*x + m_base_x) * m_base_angle;
double y1 = (*y + m_base_y) * m_base_scale + (*x * m_spiral);
*x = cos(x1) * y1 + m_translation_x;
*y = sin(x1) * y1 + m_translation_y;
}
private:
double m_base_angle;
double m_base_scale;
double m_base_x;
double m_base_y;
double m_translation_x;
double m_translation_y;
double m_spiral;
};
}
class the_application : public agg::platform_support
{
agg::slider_ctrl<agg::rgba8> m_slider1;
agg::slider_ctrl<agg::rgba8> m_slider_spiral;
agg::slider_ctrl<agg::rgba8> m_slider_base_y;
public:
the_application(agg::pix_format_e format, bool flip_y) :
agg::platform_support(format, flip_y),
m_slider1 (10, 10, 600-10, 17, !flip_y),
m_slider_spiral(10, 10+20, 600-10, 17+20, !flip_y),
m_slider_base_y(10, 10+40, 600-10, 17+40, !flip_y)
{
add_ctrl(m_slider1);
m_slider1.range(0.0, 100.0);
m_slider1.num_steps(5);
m_slider1.value(32.0);
m_slider1.label("Some Value=%1.0f");
add_ctrl(m_slider_spiral);
m_slider_spiral.label("Spiral=%.3f");
m_slider_spiral.range(-0.1, 0.1);
m_slider_spiral.value(0.0);
add_ctrl(m_slider_base_y);
m_slider_base_y.label("Base Y=%.3f");
m_slider_base_y.range(50.0, 200.0);
m_slider_base_y.value(120.0);
}
virtual ~the_application()
{
}
virtual void on_init()
{
}
virtual void on_draw()
{
typedef agg::renderer_base<agg::pixfmt_bgr24> ren_base;
typedef agg::renderer_scanline_aa_solid<ren_base> renderer;
agg::pixfmt_bgr24 pixf(rbuf_window());
ren_base rb(pixf);
renderer ren(rb);
agg::scanline_u8 sl;
rb.clear(agg::rgba(1,1,1));
agg::rasterizer_scanline_aa<> ras;
agg::render_ctrl(ras, sl, rb, m_slider1);
agg::render_ctrl(ras, sl, rb, m_slider_spiral);
agg::render_ctrl(ras, sl, rb, m_slider_base_y);
typedef agg::conv_segmentator<agg::slider_ctrl<agg::rgba8> > conv_segmentator_type;
typedef agg::conv_transform<conv_segmentator_type, agg::trans_polar> conv_transform_type;
agg::trans_polar trans;
trans.full_circle(-600);
trans.base_scale(-1.0);
trans.base_offset(0.0, m_slider_base_y.value());
trans.translation(width() / 2.0, height() / 2.0 + 30.0);
trans.spiral(-m_slider_spiral.value());
conv_segmentator_type segm(m_slider1);
conv_transform_type pipeline(segm, trans);
agg::transformed_control<agg::rgba8,
agg::slider_ctrl<agg::rgba8>,
conv_transform_type> ctrl(m_slider1, pipeline);
agg::render_ctrl(ras, sl, rb, ctrl);
}
};
int agg_main(int argc, char* argv[])
{
the_application app(agg::pix_format_bgr24, flip_y);
app.caption("AGG Example. Polar Transformer");
if(app.init(600, 400, agg::window_resize))
{
return app.run();
}
return 1;
}
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