392 lines
11 KiB
C++
392 lines
11 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_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_conv_bspline.h"
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#include "agg_conv_segmentator.h"
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#include "agg_font_freetype.h"
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#include "agg_trans_double_path.h"
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#include "ctrl/agg_cbox_ctrl.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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#include "interactive_polygon.h"
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#define AGG_BGR24
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//#define AGG_RGB24
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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_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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static char text[] =
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"Anti-Grain Geometry is designed as a set of loosely coupled "
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"algorithms and class templates united with a common idea, "
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"so that all the components can be easily combined. Also, "
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"the template based design allows you to replace any part of "
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"the library without the necessity to modify a single byte in "
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"the existing code. ";
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class the_application : public agg::platform_support
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{
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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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typedef agg::scanline_p8 scanline_type;
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typedef agg::font_engine_freetype_int16 font_engine_type;
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typedef agg::font_cache_manager<font_engine_type> font_manager_type;
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font_engine_type m_feng;
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font_manager_type m_fman;
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agg::interactive_polygon m_poly1;
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agg::interactive_polygon m_poly2;
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agg::slider_ctrl<color_type> m_num_points;
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agg::cbox_ctrl<color_type> m_fixed_len;
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agg::cbox_ctrl<color_type> m_preserve_x_scale;
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agg::cbox_ctrl<color_type> m_animate;
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double m_dx1[6];
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double m_dy1[6];
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double m_dx2[6];
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double m_dy2[6];
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bool m_prev_animate;
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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_feng(),
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m_fman(m_feng),
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m_poly1(6, 5.0),
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m_poly2(6, 5.0),
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m_num_points (5.0, 5.0, 340.0, 12.0, !flip_y),
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m_fixed_len (350, 5.0, "Fixed Length", !flip_y),
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m_preserve_x_scale(465, 5.0, "Preserve X scale", !flip_y),
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m_animate (350, 25.0, "Animate", !flip_y),
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m_prev_animate(false)
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{
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add_ctrl(m_fixed_len);
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add_ctrl(m_preserve_x_scale);
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add_ctrl(m_animate);
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m_fixed_len.status(true);
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m_preserve_x_scale.status(true);
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m_num_points.range(10.0, 400.0);
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m_num_points.value(200.0);
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m_num_points.label("Number of intermediate Points = %.3f");
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add_ctrl(m_num_points);
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m_poly1.close(false);
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m_poly2.close(false);
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}
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virtual void on_init()
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{
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m_poly1.xn(0) = 10 + 50;
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m_poly1.yn(0) = -10 + 50;
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m_poly1.xn(1) = 10 + 150 + 20;
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m_poly1.yn(1) = -10 + 150 - 20;
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m_poly1.xn(2) = 10 + 250 - 20;
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m_poly1.yn(2) = -10 + 250 + 20;
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m_poly1.xn(3) = 10 + 350 + 20;
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m_poly1.yn(3) = -10 + 350 - 20;
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m_poly1.xn(4) = 10 + 450 - 20;
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m_poly1.yn(4) = -10 + 450 + 20;
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m_poly1.xn(5) = 10 + 550;
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m_poly1.yn(5) = -10 + 550;
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m_poly2.xn(0) = -10 + 50;
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m_poly2.yn(0) = 10 + 50;
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m_poly2.xn(1) = -10 + 150 + 20;
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m_poly2.yn(1) = 10 + 150 - 20;
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m_poly2.xn(2) = -10 + 250 - 20;
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m_poly2.yn(2) = 10 + 250 + 20;
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m_poly2.xn(3) = -10 + 350 + 20;
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m_poly2.yn(3) = 10 + 350 - 20;
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m_poly2.xn(4) = -10 + 450 - 20;
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m_poly2.yn(4) = 10 + 450 + 20;
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m_poly2.xn(5) = -10 + 550;
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m_poly2.yn(5) = 10 + 550;
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}
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virtual void on_draw()
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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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rb.clear(agg::rgba(1, 1, 1));
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scanline_type sl;
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agg::rasterizer_scanline_aa<> ras;
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agg::simple_polygon_vertex_source path1(m_poly1.polygon(),
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m_poly1.num_points(),
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false,
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false);
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agg::simple_polygon_vertex_source path2(m_poly2.polygon(),
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m_poly2.num_points(),
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false,
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false);
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typedef agg::conv_bspline<agg::simple_polygon_vertex_source> conv_bspline_type;
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conv_bspline_type bspline1(path1);
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conv_bspline_type bspline2(path2);
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bspline1.interpolation_step(1.0 / m_num_points.value());
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bspline2.interpolation_step(1.0 / m_num_points.value());
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typedef agg::conv_curve<font_manager_type::path_adaptor_type> conv_font_curve_type;
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typedef agg::conv_segmentator<conv_font_curve_type> conv_font_segm_type;
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typedef agg::conv_transform<conv_font_segm_type, agg::trans_double_path> conv_font_trans_type;
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agg::trans_double_path tcurve;
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conv_font_curve_type fcurves(m_fman.path_adaptor());
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conv_font_segm_type fsegm(fcurves);
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conv_font_trans_type ftrans(fsegm, tcurve);
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tcurve.preserve_x_scale(m_preserve_x_scale.status());
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if(m_fixed_len.status()) tcurve.base_length(1140.0);
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tcurve.base_height(30.0);
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tcurve.add_paths(bspline1, bspline2);
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fsegm.approximation_scale(3.0);
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fcurves.approximation_scale(5.0);
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if(m_feng.load_font(full_file_name("timesi.ttf"), 0, agg::glyph_ren_outline))
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{
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double x = 0.0;
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double y = 3.0;
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const char* p = text;
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m_feng.hinting(false);
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m_feng.height(40);
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while(*p)
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{
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const agg::glyph_cache* glyph = m_fman.glyph(*p);
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if(glyph)
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{
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if(x > tcurve.total_length1()) break;
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m_fman.add_kerning(&x, &y);
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m_fman.init_embedded_adaptors(glyph, x, y);
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if(glyph->data_type == agg::glyph_data_outline)
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{
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ras.reset();
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ras.add_path(ftrans);
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r.color(agg::srgba8(0, 0, 0));
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agg::render_scanlines(ras, sl, r);
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}
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// increment pen position
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x += glyph->advance_x;
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y += glyph->advance_y;
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}
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++p;
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}
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}
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else
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{
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message("Please copy file timesi.ttf to the current directory\n"
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"or unzip it from ../art/timesi.zip");
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}
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typedef agg::conv_stroke<conv_bspline_type> conv_stroke_type;
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conv_stroke_type stroke1(bspline1);
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conv_stroke_type stroke2(bspline2);
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stroke1.width(2.0);
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stroke2.width(2.0);
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r.color(agg::srgba8(170, 50, 20, 100));
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ras.add_path(stroke1);
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agg::render_scanlines(ras, sl, r);
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ras.add_path(stroke2);
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agg::render_scanlines(ras, sl, r);
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//--------------------------
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// Render the "poly" tool and controls
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r.color(agg::rgba(0, 0.3, 0.5, 0.2));
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ras.add_path(m_poly1);
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agg::render_scanlines(ras, sl, r);
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ras.add_path(m_poly2);
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agg::render_scanlines(ras, sl, r);
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agg::render_ctrl(ras, sl, rb, m_fixed_len);
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agg::render_ctrl(ras, sl, rb, m_preserve_x_scale);
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agg::render_ctrl(ras, sl, rb, m_animate);
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agg::render_ctrl(ras, sl, rb, m_num_points);
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//--------------------------
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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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if(m_poly1.on_mouse_button_down(x, y))
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{
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force_redraw();
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}
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if(m_poly2.on_mouse_button_down(x, y))
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{
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force_redraw();
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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_poly1.on_mouse_move(x, y))
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{
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force_redraw();
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}
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if(m_poly2.on_mouse_move(x, y))
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{
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force_redraw();
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}
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}
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if((flags & agg::mouse_left) == 0)
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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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if(m_poly1.on_mouse_button_up(x, y))
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{
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force_redraw();
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}
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if(m_poly2.on_mouse_button_up(x, y))
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{
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force_redraw();
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}
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}
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virtual void on_key(int x, int y, unsigned key, unsigned flags)
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{
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}
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virtual void on_ctrl_change()
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{
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if(m_animate.status() != m_prev_animate)
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{
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if(m_animate.status())
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{
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on_init();
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int i;
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for(i = 0; i < 6; i++)
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{
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m_dx1[i] = ((rand() % 1000) - 500) * 0.01;
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m_dy1[i] = ((rand() % 1000) - 500) * 0.01;
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m_dx2[i] = ((rand() % 1000) - 500) * 0.01;
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m_dy2[i] = ((rand() % 1000) - 500) * 0.01;
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}
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wait_mode(false);
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}
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else
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{
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wait_mode(true);
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}
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m_prev_animate = m_animate.status();
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}
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}
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void move_point(double& x, double& y, double& dx, double& dy)
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{
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if(x < 0.0) { x = 0.0; dx = -dx; }
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if(x > width()) { x = width(); dx = -dx; }
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if(y < 0.0) { y = 0.0; dy = -dy; }
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if(y > height()) { y = height(); dy = -dy; }
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x += dx;
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y += dy;
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}
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void normalize_point(unsigned i)
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{
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double d = agg::calc_distance(m_poly1.xn(i), m_poly1.yn(i),
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m_poly2.xn(i), m_poly2.yn(i));
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// 28.8 is 20 * sqrt(2)
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if(d > 28.28)
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{
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m_poly2.xn(i) = m_poly1.xn(i) + (m_poly2.xn(i) - m_poly1.xn(i)) * 28.28 / d;
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m_poly2.yn(i) = m_poly1.yn(i) + (m_poly2.yn(i) - m_poly1.yn(i)) * 28.28 / d;
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}
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}
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virtual void on_idle()
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{
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int i;
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for(i = 0; i < 6; i++)
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{
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move_point(m_poly1.xn(i), m_poly1.yn(i), m_dx1[i], m_dy1[i]);
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move_point(m_poly2.xn(i), m_poly2.yn(i), m_dx2[i], m_dy2[i]);
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normalize_point(i);
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}
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force_redraw();
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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. Non-linear \"Along-A-Curve\" Transformer");
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if(app.init(600, 600, 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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