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rasterizer_compound.cpp
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rasterizer_compound.cpp
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#include <math.h>
#include <stdio.h>
#include "agg_basics.h"
#include "agg_ellipse.h"
#include "agg_gamma_lut.h"
#include "agg_rendering_buffer.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_rasterizer_compound_aa.h"
#include "agg_conv_curve.h"
#include "agg_conv_stroke.h"
#include "agg_scanline_u.h"
#include "agg_renderer_scanline.h"
#include "agg_span_allocator.h"
#include "agg_pixfmt_rgba.h"
#include "ctrl/agg_slider_ctrl.h"
#include "ctrl/agg_cbox_ctrl.h"
#include "platform/agg_platform_support.h"
enum flip_y_e { flip_y = true };
//-------------------------------------------------
class style_handler
{
public:
style_handler(const agg::rgba8* styles, unsigned count) :
m_transparent(0, 0, 0, 0),
m_styles(styles),
m_count(count)
{}
bool is_solid(unsigned style) const { return true; }
const agg::rgba8& color(unsigned style) const
{
if (style < m_count)
return m_styles[style];
return m_transparent;
}
void generate_span(agg::rgba8* span, int x, int y, unsigned len, unsigned style)
{
}
private:
agg::rgba8 m_transparent;
const agg::rgba8* m_styles;
unsigned m_count;
};
class the_application : public agg::platform_support
{
agg::slider_ctrl<agg::rgba8> m_width;
agg::slider_ctrl<agg::rgba8> m_alpha1;
agg::slider_ctrl<agg::rgba8> m_alpha2;
agg::slider_ctrl<agg::rgba8> m_alpha3;
agg::slider_ctrl<agg::rgba8> m_alpha4;
agg::cbox_ctrl<agg::rgba8> m_invert_order;
agg::path_storage m_path;
public:
the_application(agg::pix_format_e format, bool flip_y) :
agg::platform_support(format, flip_y),
m_width(180 + 10.0, 5.0, 130 + 300.0, 12, !flip_y),
m_alpha1(5, 5, 180, 12, !flip_y),
m_alpha2(5, 25, 180, 32, !flip_y),
m_alpha3(5, 45, 180, 52, !flip_y),
m_alpha4(5, 65, 180, 72, !flip_y),
m_invert_order(190, 25, "Invert Z-Order")
{
add_ctrl(m_width);
m_width.range(-20.0, 50.0);
m_width.value(10.0);
m_width.label("Width=%1.2f");
add_ctrl(m_alpha1);
m_alpha1.range(0, 1);
m_alpha1.value(1);
m_alpha1.label("Alpha1=%1.3f");
add_ctrl(m_alpha2);
m_alpha2.range(0, 1);
m_alpha2.value(1);
m_alpha2.label("Alpha2=%1.3f");
add_ctrl(m_alpha3);
m_alpha3.range(0, 1);
m_alpha3.value(1);
m_alpha3.label("Alpha3=%1.3f");
add_ctrl(m_alpha4);
m_alpha4.range(0, 1);
m_alpha4.value(1);
m_alpha4.label("Alpha4=%1.3f");
add_ctrl(m_invert_order);
}
void compose_path()
{
m_path.remove_all();
m_path.move_to(28.47, 6.45);
m_path.curve3(21.58, 1.12, 19.82, 0.29);
m_path.curve3(17.19, -0.93, 14.21, -0.93);
m_path.curve3(9.57, -0.93, 6.57, 2.25);
m_path.curve3(3.56, 5.42, 3.56, 10.60);
m_path.curve3(3.56, 13.87, 5.03, 16.26);
m_path.curve3(7.03, 19.58, 11.99, 22.51);
m_path.curve3(16.94, 25.44, 28.47, 29.64);
m_path.line_to(28.47, 31.40);
m_path.curve3(28.47, 38.09, 26.34, 40.58);
m_path.curve3(24.22, 43.07, 20.17, 43.07);
m_path.curve3(17.09, 43.07, 15.28, 41.41);
m_path.curve3(13.43, 39.75, 13.43, 37.60);
m_path.line_to(13.53, 34.77);
m_path.curve3(13.53, 32.52, 12.38, 31.30);
m_path.curve3(11.23, 30.08, 9.38, 30.08);
m_path.curve3(7.57, 30.08, 6.42, 31.35);
m_path.curve3(5.27, 32.62, 5.27, 34.81);
m_path.curve3(5.27, 39.01, 9.57, 42.53);
m_path.curve3(13.87, 46.04, 21.63, 46.04);
m_path.curve3(27.59, 46.04, 31.40, 44.04);
m_path.curve3(34.28, 42.53, 35.64, 39.31);
m_path.curve3(36.52, 37.21, 36.52, 30.71);
m_path.line_to(36.52, 15.53);
m_path.curve3(36.52, 9.13, 36.77, 7.69);
m_path.curve3(37.01, 6.25, 37.57, 5.76);
m_path.curve3(38.13, 5.27, 38.87, 5.27);
m_path.curve3(39.65, 5.27, 40.23, 5.62);
m_path.curve3(41.26, 6.25, 44.19, 9.18);
m_path.line_to(44.19, 6.45);
m_path.curve3(38.72, -0.88, 33.74, -0.88);
m_path.curve3(31.35, -0.88, 29.93, 0.78);
m_path.curve3(28.52, 2.44, 28.47, 6.45);
m_path.close_polygon();
m_path.move_to(28.47, 9.62);
m_path.line_to(28.47, 26.66);
m_path.curve3(21.09, 23.73, 18.95, 22.51);
m_path.curve3(15.09, 20.36, 13.43, 18.02);
m_path.curve3(11.77, 15.67, 11.77, 12.89);
m_path.curve3(11.77, 9.38, 13.87, 7.06);
m_path.curve3(15.97, 4.74, 18.70, 4.74);
m_path.curve3(22.41, 4.74, 28.47, 9.62);
m_path.close_polygon();
}
virtual void on_draw()
{
typedef agg::renderer_base<agg::pixfmt_bgra32> ren_base;
typedef agg::renderer_base<agg::pixfmt_bgra32_pre> ren_base_pre;
agg::gamma_lut<agg::int8u, agg::int8u> lut(2.0);
agg::pixfmt_bgra32 pixf(rbuf_window());
ren_base renb(pixf);
agg::pixfmt_bgra32_pre pixf_pre(rbuf_window());
ren_base_pre renb_pre(pixf_pre);
// Clear the window with a gradient
agg::pod_vector<agg::rgba8> gr(pixf_pre.width());
unsigned i;
for(i = 0; i < pixf.width(); i++)
{
gr.add(agg::rgba8(255, 255, 0).gradient(agg::rgba8(0, 255, 255),
double(i) / pixf.width()));
}
for(i = 0; i < pixf.height(); i++)
{
renb.copy_color_hspan(0, i, pixf.width(), &gr[0]);
}
pixf.apply_gamma_dir(lut);
agg::rasterizer_scanline_aa<> ras;
agg::rasterizer_compound_aa<agg::rasterizer_sl_clip_dbl> rasc;
agg::scanline_u8 sl;
agg::span_allocator<agg::rgba8> alloc;
// Draw two triangles
ras.move_to_d(0, 0);
ras.line_to_d(width(), 0);
ras.line_to_d(width(), height());
agg::render_scanlines_aa_solid(ras, sl, renb,
agg::rgba8(lut.dir(0),
lut.dir(100),
lut.dir(0)));
ras.move_to_d(0, 0);
ras.line_to_d(0, height());
ras.line_to_d(width(), 0);
agg::render_scanlines_aa_solid(ras, sl, renb,
agg::rgba8(lut.dir(0),
lut.dir(100),
lut.dir(100)));
agg::trans_affine mtx;
mtx *= agg::trans_affine_scaling(4.0);
mtx *= agg::trans_affine_translation(150, 100);
agg::conv_transform<agg::path_storage> trans(m_path, mtx);
agg::conv_curve<agg::conv_transform<agg::path_storage> > curve(trans);
agg::conv_stroke
<agg::conv_curve
<agg::conv_transform
<agg::path_storage> > > stroke(curve);
compose_path();
agg::rgba8 styles[4];
if(m_invert_order.status())
{
rasc.layer_order(agg::layer_inverse);
}
else
{
rasc.layer_order(agg::layer_direct);
}
styles[3] = agg::rgba8(lut.dir(255),
lut.dir(0),
lut.dir(108),
200).premultiply();
styles[2] = agg::rgba8(lut.dir(51),
lut.dir(0),
lut.dir(151),
180).premultiply();
styles[1] = agg::rgba8(lut.dir(143),
lut.dir(90),
lut.dir(6),
200).premultiply();
styles[0] = agg::rgba8(lut.dir(0),
lut.dir(0),
lut.dir(255),
220).premultiply();
style_handler sh(styles, 4);
stroke.width(m_width.value());
rasc.reset();
rasc.master_alpha(3, m_alpha1.value());
rasc.master_alpha(2, m_alpha2.value());
rasc.master_alpha(1, m_alpha3.value());
rasc.master_alpha(0, m_alpha4.value());
agg::ellipse ell(220.0, 180.0, 120.0, 10.0, 128, false);
agg::conv_stroke<agg::ellipse> str_ell(ell);
str_ell.width(m_width.value() / 2);
rasc.styles(3, -1);
rasc.add_path(str_ell);
rasc.styles(2, -1);
rasc.add_path(ell);
rasc.styles(1, -1);
rasc.add_path(stroke);
rasc.styles(0, -1);
rasc.add_path(curve);
agg::render_scanlines_compound_layered(rasc, sl, renb_pre, alloc, sh);
agg::render_ctrl(ras, sl, renb, m_width);
agg::render_ctrl(ras, sl, renb, m_alpha1);
agg::render_ctrl(ras, sl, renb, m_alpha2);
agg::render_ctrl(ras, sl, renb, m_alpha3);
agg::render_ctrl(ras, sl, renb, m_alpha4);
agg::render_ctrl(ras, sl, renb, m_invert_order);
pixf.apply_gamma_inv(lut);
}
};
int agg_main(int argc, char* argv[])
{
the_application app(agg::pix_format_bgra32, flip_y);
app.caption("AGG Example. Compound Rasterizer -- Geometry Flattening");
if(app.init(440, 330, 0))
{
return app.run();
}
return 1;
}