agg/examples/lion_outline.cpp

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2021-12-27 20:14:31 +01:00
#include <stdlib.h>
#include <ctype.h>
#include <stdio.h>
#include "agg_basics.h"
#include "agg_rendering_buffer.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_renderer_outline_aa.h"
#include "agg_rasterizer_outline_aa.h"
#include "agg_scanline_p.h"
#include "agg_renderer_scanline.h"
#include "agg_path_storage.h"
#include "agg_conv_transform.h"
#include "agg_bounding_rect.h"
#include "ctrl/agg_slider_ctrl.h"
#include "ctrl/agg_cbox_ctrl.h"
#include "platform/agg_platform_support.h"
#define AGG_BGR24
//#define AGG_RGB24
//#define AGG_BGRA32
//#define AGG_RGBA32
//#define AGG_ARGB32
//#define AGG_ABGR32
//#define AGG_BGR96
//#define AGG_BGRA128
//#define AGG_RGB565
//#define AGG_RGB555
#include "pixel_formats.h"
enum flip_y_e { flip_y = true };
agg::rasterizer_scanline_aa<> g_rasterizer;
agg::scanline_p8 g_scanline;
agg::path_storage g_path;
agg::srgba8 g_colors[100];
unsigned g_path_idx[100];
unsigned g_npaths = 0;
double g_x1 = 0;
double g_y1 = 0;
double g_x2 = 0;
double g_y2 = 0;
double g_base_dx = 0;
double g_base_dy = 0;
double g_angle = 0;
double g_scale = 1.0;
double g_skew_x = 0;
double g_skew_y = 0;
int g_nclick = 0;
unsigned parse_lion(agg::path_storage& ps, agg::srgba8* colors, unsigned* path_idx);
void parse_lion()
{
g_npaths = parse_lion(g_path, g_colors, g_path_idx);
agg::pod_array_adaptor<unsigned> path_idx(g_path_idx, 100);
agg::bounding_rect(g_path, path_idx, 0, g_npaths, &g_x1, &g_y1, &g_x2, &g_y2);
g_base_dx = (g_x2 - g_x1) / 2.0;
g_base_dy = (g_y2 - g_y1) / 2.0;
}
class the_application : public agg::platform_support
{
agg::slider_ctrl<color_type> m_width_slider;
agg::cbox_ctrl<color_type> m_scanline;
public:
the_application(agg::pix_format_e format, bool flip_y) :
agg::platform_support(format, flip_y),
m_width_slider(5, 5, 150, 12, !flip_y),
m_scanline(160, 5, "Use Scanline Rasterizer", !flip_y)
{
parse_lion();
add_ctrl(m_width_slider);
m_width_slider.no_transform();
m_width_slider.range(0.0, 4.0);
m_width_slider.value(1.0);
m_width_slider.label("Width %3.2f");
add_ctrl(m_scanline);
m_scanline.no_transform();
}
virtual void on_draw()
{
int width = rbuf_window().width();
int height = rbuf_window().height();
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_solid;
pixfmt pixf(rbuf_window());
renderer_base rb(pixf);
renderer_solid r(rb);
rb.clear(agg::rgba(1,1,1));
agg::trans_affine mtx;
mtx *= agg::trans_affine_translation(-g_base_dx, -g_base_dy);
mtx *= agg::trans_affine_scaling(g_scale, g_scale);
mtx *= agg::trans_affine_rotation(g_angle + agg::pi);
mtx *= agg::trans_affine_skewing(g_skew_x/1000.0, g_skew_y/1000.0);
mtx *= agg::trans_affine_translation(width/2, height/2);
if(m_scanline.status())
{
agg::conv_stroke<agg::path_storage> stroke(g_path);
stroke.width(m_width_slider.value());
stroke.line_join(agg::round_join);
agg::conv_transform<agg::conv_stroke<agg::path_storage> > trans(stroke, mtx);
agg::render_all_paths(g_rasterizer, g_scanline, r, trans, g_colors, g_path_idx, g_npaths);
}
else
{
typedef agg::renderer_outline_aa<renderer_base> renderer_type;
typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
double w = m_width_slider.value() * mtx.scale();
agg::line_profile_aa profile(w, agg::gamma_none());
renderer_type ren(rb, profile);
rasterizer_type ras(ren);
agg::conv_transform<agg::path_storage> trans(g_path, mtx);
ras.render_all_paths(trans, g_colors, g_path_idx, g_npaths);
}
agg::render_ctrl(g_rasterizer, g_scanline, rb, m_width_slider);
agg::render_ctrl(g_rasterizer, g_scanline, rb, m_scanline);
}
void transform(double width, double height, double x, double y)
{
x -= width / 2;
y -= height / 2;
g_angle = atan2(y, x);
g_scale = sqrt(y * y + x * x) / 100.0;
}
virtual void on_mouse_button_down(int x, int y, unsigned flags)
{
if(flags & agg::mouse_left)
{
int width = rbuf_window().width();
int height = rbuf_window().height();
transform(width, height, x, y);
force_redraw();
}
if(flags & agg::mouse_right)
{
g_skew_x = x;
g_skew_y = y;
force_redraw();
}
}
virtual void on_mouse_move(int x, int y, unsigned flags)
{
on_mouse_button_down(x, y, flags);
}
};
int agg_main(int argc, char* argv[])
{
the_application app(pix_format, flip_y);
app.caption("AGG Example. Lion");
if(app.init(512, 512, agg::window_resize))
{
return app.run();
}
return 1;
}