Exemplo n.º 1
0
    the_application(agg::pix_format_e format, bool flip_y) :
        agg::platform_support(format, flip_y),
        m_feng(),
        m_fman(m_feng),
        m_poly1(6, 5.0),
        m_poly2(6, 5.0),
        m_num_points      (5.0, 5.0, 340.0, 12.0, !flip_y),
        m_fixed_len       (350, 5.0,  "Fixed Length", !flip_y),
        m_preserve_x_scale(465, 5.0,  "Preserve X scale", !flip_y),
        m_animate         (350, 25.0, "Animate", !flip_y),
        m_prev_animate(false)
    {
        add_ctrl(m_fixed_len);
        add_ctrl(m_preserve_x_scale);
        add_ctrl(m_animate);
        m_fixed_len.status(true);
        m_preserve_x_scale.status(true);
        m_num_points.range(10.0, 400.0);
        m_num_points.value(200.0);
        m_num_points.label("Number of intermediate Points = %.3f");
        add_ctrl(m_num_points);

        m_poly1.close(false);
        m_poly2.close(false);
    }
Exemplo n.º 2
0
    virtual void on_draw()
    {
        pixfmt pixf(rbuf_window());
        renderer_base rb(pixf);
        renderer_solid r(rb);
        rb.clear(agg::rgba(1, 1, 1));

        scanline_type sl;
        agg::rasterizer_scanline_aa<> ras;

        m_poly.close(m_close.status());
        agg::simple_polygon_vertex_source path(m_poly.polygon(), 
                                               m_poly.num_points(), 
                                               false, 
                                               m_close.status());

        typedef agg::conv_bspline<agg::simple_polygon_vertex_source> conv_bspline_type;
        conv_bspline_type bspline(path);
        bspline.interpolation_step(1.0 / m_num_points.value());

        agg::trans_single_path tcurve;
        tcurve.add_path(bspline);
        tcurve.preserve_x_scale(m_preserve_x_scale.status());
        if(m_fixed_len.status()) tcurve.base_length(1120);

        typedef agg::conv_curve<font_manager_type::path_adaptor_type>             conv_font_curve_type;
        typedef agg::conv_segmentator<conv_font_curve_type>                      conv_font_segm_type;
        typedef agg::conv_transform<conv_font_segm_type, agg::trans_single_path> conv_font_trans_type;
        conv_font_curve_type fcurves(m_fman.path_adaptor());

        conv_font_segm_type  fsegm(fcurves);
        conv_font_trans_type ftrans(fsegm, tcurve);
        fsegm.approximation_scale(3.0);
        fcurves.approximation_scale(2.0);

        m_feng.height(40.0);
        //m_feng.italic(true);

        if(m_feng.create_font("Times New Roman", agg::glyph_ren_outline))
        {
            double x = 0.0;
            double y = 3.0;
            const char* p = text;

            while(*p)
            {
                const agg::glyph_cache* glyph = m_fman.glyph(*p);
                if(glyph)
                {
                    if(x > tcurve.total_length()) break;

                    m_fman.add_kerning(&x, &y);
                    m_fman.init_embedded_adaptors(glyph, x, y);

                    if(glyph->data_type == agg::glyph_data_outline)
                    {
                        ras.reset();
                        ras.add_path(ftrans);
                        r.color(agg::rgba8(0, 0, 0));
                        agg::render_scanlines(ras, sl, r);
                    }

                    // increment pen position
                    x += glyph->advance_x;
                    y += glyph->advance_y;
                }
                ++p;
            }

        }



        typedef agg::conv_stroke<conv_bspline_type> conv_stroke_type;
        conv_stroke_type stroke(bspline);

        stroke.width(2.0);

        r.color(agg::rgba8(170, 50, 20, 100));
        ras.add_path(stroke);
        agg::render_scanlines(ras, sl, r);

        //--------------------------
        // Render the "poly" tool and controls
        r.color(agg::rgba(0, 0.3, 0.5, 0.3));
        ras.add_path(m_poly);
        agg::render_scanlines(ras, sl, r);

        agg::render_ctrl(ras, sl, rb, m_close);
        agg::render_ctrl(ras, sl, rb, m_preserve_x_scale);
        agg::render_ctrl(ras, sl, rb, m_fixed_len);
        agg::render_ctrl(ras, sl, rb, m_animate);
        agg::render_ctrl(ras, sl, rb, m_num_points);
        //--------------------------

    }