mirror of
https://gitee.com/zlgopen/awtk.git
synced 2024-11-30 11:08:34 +08:00
306 lines
7.5 KiB
C++
306 lines
7.5 KiB
C++
#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 "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
|
|
{
|
|
|
|
class square
|
|
{
|
|
public:
|
|
square(double size) : m_size(size) {}
|
|
|
|
template<class Rasterizer, class Scanline, class Renderer, class ColorT>
|
|
void draw(Rasterizer& ras, Scanline& sl, Renderer& ren, ColorT color,
|
|
double x, double y)
|
|
{
|
|
ras.reset();
|
|
ras.move_to_d(x*m_size, y*m_size);
|
|
ras.line_to_d(x*m_size+m_size, y*m_size);
|
|
ras.line_to_d(x*m_size+m_size, y*m_size+m_size);
|
|
ras.line_to_d(x*m_size, y*m_size+m_size);
|
|
agg::render_scanlines_aa_solid(ras, sl, ren, color);
|
|
}
|
|
|
|
private:
|
|
double m_size;
|
|
};
|
|
|
|
|
|
|
|
template<class Renderer> class renderer_enlarged
|
|
{
|
|
public:
|
|
renderer_enlarged(Renderer& ren, double size) :
|
|
m_ren(ren),
|
|
m_square(size),
|
|
m_size(size) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
void color(rgba8 c) { m_color = c; }
|
|
|
|
//--------------------------------------------------------------------
|
|
void prepare() {}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class Scanline> void render(const Scanline& sl)
|
|
{
|
|
int y = sl.y();
|
|
|
|
unsigned num_spans = sl.num_spans();
|
|
typename Scanline::const_iterator span = sl.begin();
|
|
|
|
do
|
|
{
|
|
int x = span->x;
|
|
const typename Scanline::cover_type* covers = span->covers;
|
|
int num_pix = span->len;
|
|
|
|
do
|
|
{
|
|
int a = (*covers++ * m_color.a) >> 8;
|
|
m_square.draw(m_ras, m_sl, m_ren,
|
|
rgba8(m_color.r, m_color.g, m_color.b, a),
|
|
x, y);
|
|
++x;
|
|
}
|
|
while(--num_pix);
|
|
}
|
|
while(--num_spans);
|
|
}
|
|
|
|
private:
|
|
rasterizer_scanline_aa<> m_ras;
|
|
scanline_u8 m_sl;
|
|
Renderer& m_ren;
|
|
square m_square;
|
|
rgba8 m_color;
|
|
double m_size;
|
|
};
|
|
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class the_application : public agg::platform_support
|
|
{
|
|
double m_x[3];
|
|
double m_y[3];
|
|
double m_dx;
|
|
double m_dy;
|
|
int m_idx;
|
|
|
|
agg::slider_ctrl<agg::rgba8> m_slider1;
|
|
agg::slider_ctrl<agg::rgba8> m_slider2;
|
|
|
|
public:
|
|
the_application(agg::pix_format_e format, bool flip_y) :
|
|
agg::platform_support(format, flip_y),
|
|
m_slider1(80, 10, 600-10, 19, !flip_y),
|
|
m_slider2(80, 10+20, 600-10, 19+20, !flip_y)
|
|
{
|
|
m_idx = -1;
|
|
m_x[0] = 57; m_y[0] = 100;
|
|
m_x[1] = 369; m_y[1] = 170;
|
|
m_x[2] = 143; m_y[2] = 310;
|
|
|
|
add_ctrl(m_slider1);
|
|
add_ctrl(m_slider2);
|
|
|
|
m_slider1.range(8.0, 100.0);
|
|
m_slider1.num_steps(23);
|
|
m_slider1.value(32.0);
|
|
|
|
m_slider2.range(0.1, 3.0);
|
|
m_slider2.value(1.0);
|
|
|
|
m_slider1.label("Pixel size=%1.0f");
|
|
m_slider2.label("Gamma=%4.3f");
|
|
|
|
m_slider1.no_transform();
|
|
m_slider2.no_transform();
|
|
}
|
|
|
|
|
|
virtual ~the_application()
|
|
{
|
|
}
|
|
|
|
|
|
virtual void on_init()
|
|
{
|
|
}
|
|
|
|
|
|
virtual void on_draw()
|
|
{
|
|
typedef agg::renderer_base<agg::pixfmt_bgr24> ren_base;
|
|
|
|
agg::pixfmt_bgr24 pixf(rbuf_window());
|
|
ren_base ren(pixf);
|
|
agg::scanline_u8 sl;
|
|
|
|
ren.clear(agg::rgba(1,1,1));
|
|
|
|
agg::rasterizer_scanline_aa<> ras;
|
|
|
|
int size_mul = int(m_slider1.value());
|
|
|
|
ras.gamma(agg::gamma_power(m_slider2.value()));
|
|
|
|
|
|
agg::renderer_enlarged<ren_base> ren_en(ren, size_mul);
|
|
|
|
ras.reset();
|
|
ras.move_to_d(m_x[0]/size_mul, m_y[0]/size_mul);
|
|
ras.line_to_d(m_x[1]/size_mul, m_y[1]/size_mul);
|
|
ras.line_to_d(m_x[2]/size_mul, m_y[2]/size_mul);
|
|
ren_en.color(agg::rgba8(0,0,0, 255));
|
|
agg::render_scanlines(ras, sl, ren_en);
|
|
|
|
|
|
agg::render_scanlines_aa_solid(ras, sl, ren, agg::rgba8(0,0,0));
|
|
|
|
ras.gamma(agg::gamma_none());
|
|
|
|
agg::path_storage ps;
|
|
agg::conv_stroke<agg::path_storage> pg(ps);
|
|
pg.width(2.0);
|
|
|
|
ps.remove_all();
|
|
ps.move_to(m_x[0], m_y[0]);
|
|
ps.line_to(m_x[1], m_y[1]);
|
|
ras.add_path(pg);
|
|
agg::render_scanlines_aa_solid(ras, sl, ren, agg::rgba8(0,150,160, 200));
|
|
|
|
ps.remove_all();
|
|
ps.move_to(m_x[1], m_y[1]);
|
|
ps.line_to(m_x[2], m_y[2]);
|
|
ras.add_path(pg);
|
|
agg::render_scanlines_aa_solid(ras, sl, ren, agg::rgba8(0,150,160, 200));
|
|
|
|
ps.remove_all();
|
|
ps.move_to(m_x[2], m_y[2]);
|
|
ps.line_to(m_x[0], m_y[0]);
|
|
ras.add_path(pg);
|
|
agg::render_scanlines_aa_solid(ras, sl, ren, agg::rgba8(0,150,160, 200));
|
|
|
|
// Render the controls
|
|
agg::render_ctrl(ras, sl, ren, m_slider1);
|
|
agg::render_ctrl(ras, sl, ren, m_slider2);
|
|
}
|
|
|
|
|
|
|
|
|
|
virtual void on_mouse_button_down(int x, int y, unsigned flags)
|
|
{
|
|
if(flags & agg::mouse_left)
|
|
{
|
|
unsigned i;
|
|
for (i = 0; i < 3; i++)
|
|
{
|
|
if(sqrt( (x-m_x[i]) * (x-m_x[i]) + (y-m_y[i]) * (y-m_y[i]) ) < 10.0)
|
|
{
|
|
m_dx = x - m_x[i];
|
|
m_dy = y - m_y[i];
|
|
m_idx = i;
|
|
break;
|
|
}
|
|
}
|
|
if(i == 3)
|
|
{
|
|
if(agg::point_in_triangle(m_x[0], m_y[0],
|
|
m_x[1], m_y[1],
|
|
m_x[2], m_y[2],
|
|
x, y))
|
|
{
|
|
m_dx = x - m_x[0];
|
|
m_dy = y - m_y[0];
|
|
m_idx = 3;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
virtual void on_mouse_move(int x, int y, unsigned flags)
|
|
{
|
|
if(flags & agg::mouse_left)
|
|
{
|
|
if(m_idx == 3)
|
|
{
|
|
double dx = x - m_dx;
|
|
double dy = y - m_dy;
|
|
m_x[1] -= m_x[0] - dx;
|
|
m_y[1] -= m_y[0] - dy;
|
|
m_x[2] -= m_x[0] - dx;
|
|
m_y[2] -= m_y[0] - dy;
|
|
m_x[0] = dx;
|
|
m_y[0] = dy;
|
|
force_redraw();
|
|
return;
|
|
}
|
|
|
|
if(m_idx >= 0)
|
|
{
|
|
m_x[m_idx] = x - m_dx;
|
|
m_y[m_idx] = 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_idx = -1;
|
|
}
|
|
};
|
|
|
|
|
|
int agg_main(int argc, char* argv[])
|
|
{
|
|
the_application app(agg::pix_format_bgr24, flip_y);
|
|
app.caption("AGG Example. Anti-Aliasing Demo");
|
|
|
|
if(app.init(600, 400, agg::window_resize))
|
|
{
|
|
return app.run();
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|