176 lines
4.4 KiB
C++
176 lines
4.4 KiB
C++
#include <stdlib.h>
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#include <ctype.h>
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#include <stdio.h>
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#include "agg_basics.h"
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#include "agg_rendering_buffer.h"
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#include "agg_rasterizer_scanline_aa.h"
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#include "agg_scanline_p.h"
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#include "agg_renderer_scanline.h"
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#include "agg_path_storage.h"
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#include "agg_conv_transform.h"
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#include "agg_bounding_rect.h"
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#include "ctrl/agg_slider_ctrl.h"
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#include "platform/agg_platform_support.h"
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//#define AGG_GRAY16
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//#define AGG_GRAY32
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#define AGG_BGR24
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//#define AGG_BGR48
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//#define AGG_RGB_AAA
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//#define AGG_BGRA32
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//#define AGG_RGBA32
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//#define AGG_ARGB32
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//#define AGG_ABGR32
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//#define AGG_BGR96
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//#define AGG_BGRA128
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//#define AGG_RGB565
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//#define AGG_RGB555
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#include "pixel_formats.h"
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enum flip_y_e { flip_y = true };
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agg::rasterizer_scanline_aa<> g_rasterizer;
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agg::scanline_p8 g_scanline;
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agg::path_storage g_path;
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agg::srgba8 g_colors[100];
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unsigned g_path_idx[100];
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unsigned g_npaths = 0;
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double g_x1 = 0;
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double g_y1 = 0;
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double g_x2 = 0;
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double g_y2 = 0;
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double g_base_dx = 0;
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double g_base_dy = 0;
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double g_angle = 0;
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double g_scale = 1.0;
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double g_skew_x = 0;
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double g_skew_y = 0;
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int g_nclick = 0;
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unsigned parse_lion(agg::path_storage& ps, agg::srgba8* colors, unsigned* path_idx);
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void parse_lion()
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{
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g_npaths = parse_lion(g_path, g_colors, g_path_idx);
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agg::pod_array_adaptor<unsigned> path_idx(g_path_idx, 100);
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agg::bounding_rect(g_path, path_idx, 0, g_npaths, &g_x1, &g_y1, &g_x2, &g_y2);
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g_base_dx = (g_x2 - g_x1) / 2.0;
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g_base_dy = (g_y2 - g_y1) / 2.0;
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}
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class the_application : public agg::platform_support
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{
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agg::slider_ctrl<color_type> m_alpha_slider;
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public:
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typedef agg::renderer_base<pixfmt> renderer_base;
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typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_solid;
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the_application(agg::pix_format_e format, bool flip_y) :
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agg::platform_support(format, flip_y),
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m_alpha_slider(5, 5, 512-5, 12, !flip_y)
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{
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parse_lion();
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add_ctrl(m_alpha_slider);
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m_alpha_slider.no_transform();
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m_alpha_slider.label("Alpha%3.3f");
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m_alpha_slider.value(0.1);
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}
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virtual void on_resize(int cx, int cy)
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{
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pixfmt pf(rbuf_window());
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renderer_base r(pf);
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r.clear(agg::rgba(1, 1, 1));
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}
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virtual void on_draw()
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{
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int width = rbuf_window().width();
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int height = rbuf_window().height();
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unsigned i;
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for(i = 0; i < g_npaths; i++)
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{
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g_colors[i].a = agg::int8u(m_alpha_slider.value() * 255);
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}
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pixfmt pixf(rbuf_window());
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renderer_base rb(pixf);
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renderer_solid r(rb);
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agg::trans_affine mtx;
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mtx *= agg::trans_affine_translation(-g_base_dx, -g_base_dy);
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mtx *= agg::trans_affine_scaling(g_scale, g_scale);
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mtx *= agg::trans_affine_rotation(g_angle + agg::pi);
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mtx *= agg::trans_affine_skewing(g_skew_x/1000.0, g_skew_y/1000.0);
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mtx *= agg::trans_affine_translation(width/2, height/2);
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// This code renders the lion:
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agg::conv_transform<agg::path_storage, agg::trans_affine> trans(g_path, mtx);
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agg::render_all_paths(g_rasterizer, g_scanline, r, trans, g_colors, g_path_idx, g_npaths);
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// Render the control
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agg::render_ctrl(g_rasterizer, g_scanline, rb, m_alpha_slider);
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}
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void transform(double width, double height, double x, double y)
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{
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x -= width / 2;
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y -= height / 2;
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g_angle = atan2(y, x);
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g_scale = sqrt(y * y + x * x) / 100.0;
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}
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virtual void on_mouse_button_down(int x, int y, unsigned flags)
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{
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if(flags & agg::mouse_left)
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{
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int width = rbuf_window().width();
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int height = rbuf_window().height();
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transform(width, height, x, y);
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force_redraw();
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}
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if(flags & agg::mouse_right)
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{
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g_skew_x = x;
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g_skew_y = y;
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force_redraw();
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}
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}
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virtual void on_mouse_move(int x, int y, unsigned flags)
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{
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on_mouse_button_down(x, y, flags);
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}
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};
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int agg_main(int argc, char* argv[])
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{
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the_application app(pix_format, flip_y);
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app.caption("AGG Example. Lion");
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if(app.init(512, 400, agg::window_resize))
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{
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return app.run();
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}
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return 1;
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}
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