#include <math.h> #include <stdio.h> #include <time.h> #include "agg_math.h" #include "agg_rendering_buffer.h" #include "agg_conv_transform.h" #include "agg_conv_stroke.h" #include "agg_conv_clip_polyline.h" #include "agg_scanline_p.h" #include "agg_renderer_scanline.h" #include "agg_rasterizer_outline_aa.h" #include "agg_rasterizer_scanline_aa.h" #include "agg_pattern_filters_rgba.h" #include "agg_renderer_outline_aa.h" #include "agg_renderer_outline_image.h" #include "agg_path_storage.h" #include "agg_pixfmt_rgb.h" #include "ctrl/agg_slider_ctrl.h" #include "ctrl/agg_bezier_ctrl.h" #include "platform/agg_platform_support.h" enum flip_y_e { flip_y = true }; typedef agg::pixfmt_bgr24 pixfmt; static agg::int8u brightness_to_alpha[256 * 3] = { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 254, 254, 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 252, 252, 252, 252, 252, 252, 252, 252, 252, 252, 252, 252, 251, 251, 251, 251, 251, 251, 251, 251, 251, 250, 250, 250, 250, 250, 250, 250, 250, 249, 249, 249, 249, 249, 249, 249, 248, 248, 248, 248, 248, 248, 248, 247, 247, 247, 247, 247, 246, 246, 246, 246, 246, 246, 245, 245, 245, 245, 245, 244, 244, 244, 244, 243, 243, 243, 243, 243, 242, 242, 242, 242, 241, 241, 241, 241, 240, 240, 240, 239, 239, 239, 239, 238, 238, 238, 238, 237, 237, 237, 236, 236, 236, 235, 235, 235, 234, 234, 234, 233, 233, 233, 232, 232, 232, 231, 231, 230, 230, 230, 229, 229, 229, 228, 228, 227, 227, 227, 226, 226, 225, 225, 224, 224, 224, 223, 223, 222, 222, 221, 221, 220, 220, 219, 219, 219, 218, 218, 217, 217, 216, 216, 215, 214, 214, 213, 213, 212, 212, 211, 211, 210, 210, 209, 209, 208, 207, 207, 206, 206, 205, 204, 204, 203, 203, 202, 201, 201, 200, 200, 199, 198, 198, 197, 196, 196, 195, 194, 194, 193, 192, 192, 191, 190, 190, 189, 188, 188, 187, 186, 186, 185, 184, 183, 183, 182, 181, 180, 180, 179, 178, 177, 177, 176, 175, 174, 174, 173, 172, 171, 171, 170, 169, 168, 167, 166, 166, 165, 164, 163, 162, 162, 161, 160, 159, 158, 157, 156, 156, 155, 154, 153, 152, 151, 150, 149, 148, 148, 147, 146, 145, 144, 143, 142, 141, 140, 139, 138, 137, 136, 135, 134, 133, 132, 131, 130, 129, 128, 128, 127, 125, 124, 123, 122, 121, 120, 119, 118, 117, 116, 115, 114, 113, 112, 111, 110, 109, 108, 107, 106, 105, 104, 102, 101, 100, 99, 98, 97, 96, 95, 94, 93, 91, 90, 89, 88, 87, 86, 85, 84, 82, 81, 80, 79, 78, 77, 75, 74, 73, 72, 71, 70, 69, 67, 66, 65, 64, 63, 61, 60, 59, 58, 57, 56, 54, 53, 52, 51, 50, 48, 47, 46, 45, 44, 42, 41, 40, 39, 37, 36, 35, 34, 33, 31, 30, 29, 28, 27, 25, 24, 23, 22, 20, 19, 18, 17, 15, 14, 13, 12, 11, 9, 8, 7, 6, 4, 3, 2, 1 }; class pattern_src_brightness_to_alpha_rgba8 { public: pattern_src_brightness_to_alpha_rgba8(agg::rendering_buffer& rb) : m_rb(&rb), m_pf(*m_rb) {} unsigned width() const { return m_pf.width(); } unsigned height() const { return m_pf.height(); } agg::rgba8 pixel(int x, int y) const { agg::rgba8 c = m_pf.pixel(x, y); c.a = brightness_to_alpha[c.r + c.g + c.b]; return c; } private: agg::rendering_buffer* m_rb; pixfmt m_pf; }; class the_application : public agg::platform_support { agg::rgba8 m_ctrl_color; agg::polygon_ctrl<agg::rgba8> m_line1; agg::slider_ctrl<agg::rgba8> m_scale_x; agg::slider_ctrl<agg::rgba8> m_start_x; agg::trans_affine m_scale; public: typedef agg::renderer_base<pixfmt> renderer_base; typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_scanline; typedef agg::rasterizer_scanline_aa<agg::rasterizer_sl_clip_int_sat> rasterizer_scanline; typedef agg::scanline_p8 scanline; the_application(agg::pix_format_e format, bool flip_y) : agg::platform_support(format, flip_y), m_ctrl_color(agg::rgba(0, 0.3, 0.5, 0.3)), m_line1(5), m_scale_x(5.0, 5.0, 240.0, 12.0, !flip_y), m_start_x(250.0, 5.0, 495.0, 12.0, !flip_y) { m_line1.line_color(m_ctrl_color); m_line1.xn(0) = 20; m_line1.yn(0) = 20; m_line1.xn(1) = 500-20; m_line1.yn(1) = 500-20; m_line1.xn(2) = 500-60; m_line1.yn(2) = 20; m_line1.xn(3) = 40; m_line1.yn(3) = 500-40; m_line1.xn(4) = 100; m_line1.yn(4) = 300; m_line1.close(false); add_ctrl(m_line1); m_line1.transform(m_scale); m_scale_x.label("Scale X=%.2f"); m_scale_x.range(0.2, 3.0); m_scale_x.value(1.0); add_ctrl(m_scale_x); m_scale_x.no_transform(); m_start_x.label("Start X=%.2f"); m_start_x.range(0.0, 10.0); m_start_x.value(0.0); add_ctrl(m_start_x); m_start_x.no_transform(); } template<class Rasterizer, class Renderer> void draw_polyline(Rasterizer& ras, Renderer& ren, const double* polyline, int num_points) { agg::poly_plain_adaptor<double> vs(polyline, num_points, m_line1.close()); agg::conv_transform<agg::poly_plain_adaptor<double> > trans(vs, m_scale); ras.add_path(trans); } virtual void on_draw() { pixfmt pf(rbuf_window()); renderer_base ren_base(pf); ren_base.clear(agg::rgba(0.5, 0.75, 0.85)); renderer_scanline ren(ren_base); rasterizer_scanline ras; scanline sl; ras.clip_box(0, 0, width(), height()); // Pattern source. Must have an interface: // width() const // height() const // pixel(int x, int y) const // Any agg::renderer_base<> or derived // is good for the use as a source. //----------------------------------- pattern_src_brightness_to_alpha_rgba8 p1(rbuf_img(0)); agg::pattern_filter_bilinear_rgba8 fltr; // Filtering functor // agg::line_image_pattern is the main container for the patterns. It creates // a copy of the patterns extended according to the needs of the filter. // agg::line_image_pattern can operate with arbitrary image width, but if the // width of the pattern is power of 2, it's better to use the modified // version agg::line_image_pattern_pow2 because it works about 15-25 percent // faster than agg::line_image_pattern (because of using simple masking instead // of expensive '%' operation). typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba8> pattern_type; typedef agg::renderer_base<pixfmt> base_ren_type; typedef agg::renderer_outline_image<base_ren_type, pattern_type> renderer_img_type; typedef agg::rasterizer_outline_aa<renderer_img_type, agg::line_coord_sat> rasterizer_img_type; typedef agg::renderer_outline_aa<base_ren_type> renderer_line_type; typedef agg::rasterizer_outline_aa<renderer_line_type, agg::line_coord_sat> rasterizer_line_type; //-- Create with specifying the source //pattern_type patt(fltr, src); //-- Create uninitialized and set the source pattern_type patt(fltr); patt.create(p1); renderer_img_type ren_img(ren_base, patt); rasterizer_img_type ras_img(ren_img); //-- create uninitialized and set parameters agg::line_profile_aa profile; profile.smoother_width(10.0); //optional profile.width(8.0); //mandatory! renderer_line_type ren_line(ren_base, profile); ren_line.color(agg::rgba8(0,0,127)); //mandatory! rasterizer_line_type ras_line(ren_line); ras_line.round_cap(true); //optional //ras_line.line_join(agg::outline_no_join); //optional // Calculate the dilation value so that, the line caps were // drawn correctly. //--------------- double w2 = 9.0;//p1.height() / 2 + 2; // Set the clip box a bit bigger than you expect. You need it // to draw the clipped line caps correctly. The correct result // is achieved with raster clipping. //------------------------ ren_img.scale_x(m_scale_x.value()); ren_img.start_x(m_start_x.value()); ren_img.clip_box (50-w2, 50-w2, width()-50+w2, height()-50+w2); ren_line.clip_box(50-w2, 50-w2, width()-50+w2, height()-50+w2); // First, draw polyline without raster clipping just to show the idea //------------------------ draw_polyline(ras_line, ren_line, m_line1.polygon(), m_line1.num_points()); draw_polyline(ras_img, ren_img, m_line1.polygon(), m_line1.num_points()); // Clear the area, almost opaque, but not completely //------------------------ ren_base.blend_bar(0, 0, (int)width(), (int)height(), agg::rgba(1,1,1), 200); // Set the raster clip box and then, draw again. // In reality there shouldn't be two calls above. // It's done only for demonstration //------------------------ ren_base.clip_box((int)50, (int)50, (int)width()-50, (int)height()-50); // This "copy_bar" is also for demonstration only //------------------------ ren_base.copy_bar(0, 0, (int)width(), (int)height(), agg::rgba(1,1,1)); // Finally draw polyline correctly clipped: We use double clipping, // first is vector clipping, with extended clip box, second is raster // clipping with normal clip box. //------------------------ ren_img.scale_x(m_scale_x.value()); ren_img.start_x(m_start_x.value()); draw_polyline(ras_line, ren_line, m_line1.polygon(), m_line1.num_points()); draw_polyline(ras_img, ren_img, m_line1.polygon(), m_line1.num_points()); // Reset clipping and draw the controls and stuff ren_base.reset_clipping(true); m_line1.line_width(1/m_scale.scale()); m_line1.point_radius(5/m_scale.scale()); agg::render_ctrl(ras, sl, ren_base, m_line1); agg::render_ctrl(ras, sl, ren_base, m_scale_x); agg::render_ctrl(ras, sl, ren_base, m_start_x); char buf[256]; agg::gsv_text t; t.size(10.0); agg::conv_stroke<agg::gsv_text> pt(t); pt.width(1.5); pt.line_cap(agg::round_cap); const double* p = m_line1.polygon(); sprintf(buf, "Len=%.2f", agg::calc_distance(p[0], p[1], p[2], p[3]) * m_scale.scale()); t.start_point(10.0, 30.0); t.text(buf); ras.add_path(pt); ren.color(agg::rgba(0,0,0)); agg::render_scanlines(ras, sl, ren); } virtual void on_key(int x, int y, unsigned key, unsigned flags) { if(key == '+' || key == agg::key_kp_plus) { m_scale *= agg::trans_affine_translation(-x, -y); m_scale *= agg::trans_affine_scaling(1.1); m_scale *= agg::trans_affine_translation(x, y); force_redraw(); } if(key == '-' || key == agg::key_kp_minus) { m_scale *= agg::trans_affine_translation(-x, -y); m_scale *= agg::trans_affine_scaling(1/1.1); m_scale *= agg::trans_affine_translation(x, y); force_redraw(); } } virtual void on_ctrl_change() { } }; int agg_main(int argc, char* argv[]) { the_application app(agg::pix_format_bgr24, flip_y); app.caption("AGG Example. Clipping Lines with Image Patterns"); if(!app.load_img(0, "1")) { char buf[256]; sprintf(buf, "There must be file 1%s\n", app.img_ext(), app.img_ext()); app.message(buf); return 1; } if(app.init(500, 500, agg::window_resize)) { return app.run(); } return 1; } |