162 lines
4.1 KiB
C++
162 lines
4.1 KiB
C++
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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_pixfmt_rgb.h"
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#include "agg_ellipse.h"
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#include "agg_rounded_rect.h"
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#include "agg_conv_stroke.h"
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#include "platform/agg_platform_support.h"
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#include "ctrl/agg_slider_ctrl.h"
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#include "ctrl/agg_cbox_ctrl.h"
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#define AGG_BGR24
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#include "pixel_formats.h"
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enum flip_y_e { flip_y = true };
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class the_application : public agg::platform_support
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{
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double m_x[2];
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double m_y[2];
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double m_dx;
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double m_dy;
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int m_idx;
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agg::slider_ctrl<color_type> m_radius;
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agg::slider_ctrl<color_type> m_offset;
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agg::cbox_ctrl<color_type> m_white_on_black;
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public:
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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_idx(-1),
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m_radius(10, 10, 600-10, 19, !flip_y),
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m_offset(10, 10+20, 600-10, 19+20, !flip_y),
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m_white_on_black(10, 10+40, "White on black")
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{
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m_x[0] = 100; m_y[0] = 100;
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m_x[1] = 500; m_y[1] = 350;
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add_ctrl(m_radius);
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add_ctrl(m_offset);
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add_ctrl(m_white_on_black);
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m_radius.label("radius=%4.3f");
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m_radius.range(0.0, 50.0);
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m_radius.value(25.0);
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m_offset.label("subpixel offset=%4.3f");
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m_offset.range(-2.0, 3.0);
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m_white_on_black.text_color(agg::srgba8(127, 127, 127));
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m_white_on_black.inactive_color(agg::srgba8(127, 127, 127));
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}
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virtual void on_draw()
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{
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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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pixfmt pixf(rbuf_window());
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renderer_base rb(pixf);
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renderer_solid ren(rb);
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rb.clear(m_white_on_black.status() ? agg::rgba(0,0,0) : agg::rgba(1,1,1));
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agg::rasterizer_scanline_aa<> ras;
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agg::scanline_p8 sl;
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agg::ellipse e;
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// Render two "control" circles
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ren.color(agg::srgba8(127,127,127));
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e.init(m_x[0], m_y[0], 3, 3, 16);
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ras.add_path(e);
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agg::render_scanlines(ras, sl, ren);
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e.init(m_x[1], m_y[1], 3, 3, 16);
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ras.add_path(e);
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agg::render_scanlines(ras, sl, ren);
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double d = m_offset.value();
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// Creating a rounded rectangle
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agg::rounded_rect r(m_x[0]+d, m_y[0]+d, m_x[1]+d, m_y[1]+d, m_radius.value());
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r.normalize_radius();
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// Drawing as an outline
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agg::conv_stroke<agg::rounded_rect> p(r);
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p.width(1.0);
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ras.add_path(p);
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ren.color(m_white_on_black.status() ? agg::rgba(1,1,1) : agg::rgba(0,0,0));
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agg::render_scanlines(ras, sl, ren);
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// Render the controls
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agg::render_ctrl(ras, sl, rb, m_radius);
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agg::render_ctrl(ras, sl, rb, m_offset);
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agg::render_ctrl(ras, sl, rb, m_white_on_black);
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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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unsigned i;
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for (i = 0; i < 2; i++)
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{
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if(sqrt( (x-m_x[i]) * (x-m_x[i]) + (y-m_y[i]) * (y-m_y[i]) ) < 5.0)
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{
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m_dx = x - m_x[i];
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m_dy = y - m_y[i];
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m_idx = i;
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break;
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}
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}
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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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if(flags & agg::mouse_left)
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{
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if(m_idx >= 0)
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{
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m_x[m_idx] = x - m_dx;
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m_y[m_idx] = y - m_dy;
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force_redraw();
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}
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}
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else
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{
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on_mouse_button_up(x, y, flags);
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}
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}
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virtual void on_mouse_button_up(int x, int y, unsigned flags)
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{
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m_idx = -1;
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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. Rounded rectangle");
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if(app.init(600, 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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