virtual void on_draw()
{
typedef agg::pixfmt_gray8 pixfmt_gray8;
typedef agg::renderer_base<pixfmt_gray8> ren_base_gray8;
m_ras.clip_box(0,0, width(), height());
pixfmt_gray8 pixf_gray8(m_gray8_rbuf);
ren_base_gray8 renb_gray8(pixf_gray8);
renb_gray8.clear(agg::gray8(0));
// Testing enhanced compositing operations.
// Uncomment and replace renb.blend_from_* to renb_blend.blend_from_*
//----------------
//typedef agg::comp_op_rgba_minus<color_type, component_order> blender_type;
//typedef agg::comp_adaptor_rgba<blender_type> blend_adaptor_type;
//typedef agg::pixfmt_custom_blend_rgba<blend_adaptor_type, agg::rendering_buffer> pixfmt_type;
//typedef agg::renderer_base<pixfmt_type> ren_base;
//pixfmt_type pixf_blend(rbuf_window());
//agg::renderer_base<pixfmt_type> renb_blend(pixf_blend);
pixfmt pixf(rbuf_window());
agg::renderer_base<pixfmt> renb(pixf);
renb.clear(agg::rgba(1, 0.95, 0.95));
agg::trans_perspective shadow_persp(m_shape_bounds.x1, m_shape_bounds.y1,
m_shape_bounds.x2, m_shape_bounds.y2,
m_shadow_ctrl.polygon());
agg::conv_transform<shape_type,
agg::trans_perspective> shadow_trans(m_shape,
shadow_persp);
start_timer();
// Render shadow
m_ras.add_path(shadow_trans);
agg::render_scanlines_aa_solid(m_ras, m_sl, renb_gray8, agg::gray8(255));
// Calculate the bounding box and extend it by the blur radius
agg::rect_d bbox;
agg::bounding_rect_single(shadow_trans, 0, &bbox.x1, &bbox.y1, &bbox.x2, &bbox.y2);
bbox.x1 -= m_radius.value();
bbox.y1 -= m_radius.value();
bbox.x2 += m_radius.value();
bbox.y2 += m_radius.value();
if(bbox.clip(agg::rect_d(0, 0, width(), height())))
{
// Create a new pixel renderer and attach it to the main one as a child image.
// It returns true if the attachment suceeded. It fails if the rectangle
// (bbox) is fully clipped.
//------------------
pixfmt_gray8 pixf2(m_gray8_rbuf2);
if(pixf2.attach(pixf_gray8, int(bbox.x1), int(bbox.y1), int(bbox.x2), int(bbox.y2)))
{
// Blur it
agg::stack_blur_gray8(pixf2, agg::uround(m_radius.value()),
agg::uround(m_radius.value()));
}
if(m_method.cur_item() == 0)
{
renb.blend_from_color(pixf2,
agg::rgba8(0, 100, 0),
0,
int(bbox.x1),
int(bbox.y1));
}
else
{
renb.blend_from_lut(pixf2,
m_color_lut.data(),
0,
int(bbox.x1),
int(bbox.y1));
}
}
double tm = elapsed_time();
char buf[64];
agg::gsv_text t;
t.size(10.0);
agg::conv_stroke<agg::gsv_text> st(t);
st.width(1.5);
sprintf(buf, "%3.2f ms", tm);
t.start_point(140.0, 30.0);
t.text(buf);
m_ras.add_path(st);
agg::render_scanlines_aa_solid(m_ras, m_sl, renb, agg::rgba(0,0,0));
agg::render_ctrl(m_ras, m_sl, renb, m_method);
agg::render_ctrl(m_ras, m_sl, renb, m_radius);
agg::render_ctrl(m_ras, m_sl, renb, m_shadow_ctrl);
}
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);
if(m_feng.load_font(full_file_name("timesi.ttf"), 0, agg::glyph_ren_outline))
{
double x = 0.0;
double y = 3.0;
const char* p = text;
m_feng.hinting(false);
m_feng.height(40);
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::srgba8(0, 0, 0));
agg::render_scanlines(ras, sl, r);
}
// increment pen position
x += glyph->advance_x;
y += glyph->advance_y;
}
++p;
}
}
else
{
message("Please copy file timesi.ttf to the current directory\n"
"or download it from http://www.antigrain.com/timesi.zip");
}
typedef agg::conv_stroke<conv_bspline_type> conv_stroke_type;
conv_stroke_type stroke(bspline);
stroke.width(2.0);
r.color(agg::srgba8(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);
//--------------------------
}
virtual void on_draw()
{
typedef agg::renderer_base<pixfmt> ren_base;
typedef agg::renderer_base<pixfmt_pre> ren_base_pre;
agg::gamma_lut<agg::int8u, agg::int8u> lut;
#if !LINEAR_RGB
lut.gamma(2.2);
#endif
pixfmt pixf(rbuf_window());
ren_base renb(pixf);
pixfmt_pre pixf_pre(rbuf_window());
ren_base_pre renb_pre(pixf_pre);
// Clear the window with a gradient
agg::pod_vector<color_type> gr(pixf_pre.width());
unsigned i;
for(i = 0; i < pixf.width(); i++)
{
gr.add(agg::rgba8(255, 255, 0).gradient(agg::rgba8(0, 255, 255),
double(i) / pixf.width()));
}
for(i = 0; i < pixf.height(); i++)
{
renb.copy_color_hspan(0, i, pixf.width(), &gr[0]);
}
#if !LINEAR_RGB
pixf.apply_gamma_dir(lut);
#endif
agg::rasterizer_scanline_aa<> ras;
agg::rasterizer_compound_aa<agg::rasterizer_sl_clip_dbl> rasc;
agg::scanline_u8 sl;
agg::span_allocator<color_type> alloc;
// Draw two triangles
ras.move_to_d(0, 0);
ras.line_to_d(width(), 0);
ras.line_to_d(width(), height());
agg::render_scanlines_aa_solid(ras, sl, renb,
agg::rgba8(lut.dir(0),
lut.dir(100),
lut.dir(0)));
ras.move_to_d(0, 0);
ras.line_to_d(0, height());
ras.line_to_d(width(), 0);
agg::render_scanlines_aa_solid(ras, sl, renb,
agg::rgba8(lut.dir(0),
lut.dir(100),
lut.dir(100)));
agg::trans_affine mtx;
mtx *= agg::trans_affine_scaling(4.0);
mtx *= agg::trans_affine_translation(150, 100);
agg::conv_transform<agg::path_storage> trans(m_path, mtx);
agg::conv_curve<agg::conv_transform<agg::path_storage> > curve(trans);
agg::conv_stroke
<agg::conv_curve
<agg::conv_transform
<agg::path_storage> > > stroke(curve);
compose_path();
color_type styles[4];
if(m_invert_order.status())
{
rasc.layer_order(agg::layer_inverse);
}
else
{
rasc.layer_order(agg::layer_direct);
}
styles[3] = agg::rgba8(lut.dir(255),
lut.dir(0),
lut.dir(108),
200).premultiply();
styles[2] = agg::rgba8(lut.dir(51),
lut.dir(0),
lut.dir(151),
180).premultiply();
styles[1] = agg::rgba8(lut.dir(143),
lut.dir(90),
lut.dir(6),
200).premultiply();
styles[0] = agg::rgba8(lut.dir(0),
lut.dir(0),
lut.dir(255),
220).premultiply();
style_handler sh(styles, 4);
stroke.width(m_width.value());
rasc.reset();
rasc.master_alpha(3, m_alpha1.value());
rasc.master_alpha(2, m_alpha2.value());
rasc.master_alpha(1, m_alpha3.value());
rasc.master_alpha(0, m_alpha4.value());
agg::ellipse ell(220.0, 180.0, 120.0, 10.0, 128, false);
agg::conv_stroke<agg::ellipse> str_ell(ell);
str_ell.width(m_width.value() / 2);
rasc.styles(3, -1);
rasc.add_path(str_ell);
rasc.styles(2, -1);
rasc.add_path(ell);
rasc.styles(1, -1);
rasc.add_path(stroke);
rasc.styles(0, -1);
rasc.add_path(curve);
agg::render_scanlines_compound_layered(rasc, sl, renb_pre, alloc, sh);
agg::render_ctrl(ras, sl, renb, m_width);
agg::render_ctrl(ras, sl, renb, m_alpha1);
agg::render_ctrl(ras, sl, renb, m_alpha2);
agg::render_ctrl(ras, sl, renb, m_alpha3);
agg::render_ctrl(ras, sl, renb, m_alpha4);
agg::render_ctrl(ras, sl, renb, m_invert_order);
#if !LINEAR_RGB
pixf.apply_gamma_inv(lut);
#endif
}
virtual void on_draw()
{
double img_width = rbuf_img(0).width();
double img_height = rbuf_img(0).height();
typedef pixfmt pixfmt;
typedef agg::renderer_base<pixfmt> renderer_base;
pixfmt pixf(rbuf_window());
pixfmt img_pixf(rbuf_img(0));
renderer_base rb(pixf);
rb.clear(agg::rgba(1.0, 1.0, 1.0));
agg::trans_affine src_mtx;
src_mtx *= agg::trans_affine_translation(-img_width/2, -img_height/2);
src_mtx *= agg::trans_affine_rotation(m_angle.value() * agg::pi / 180.0);
src_mtx *= agg::trans_affine_translation(img_width/2 + 10, img_height/2 + 10 + 40);
src_mtx *= trans_affine_resizing();
agg::trans_affine img_mtx;
img_mtx *= agg::trans_affine_translation(-img_width/2, -img_height/2);
img_mtx *= agg::trans_affine_rotation(m_angle.value() * agg::pi / 180.0);
img_mtx *= agg::trans_affine_scaling(m_scale.value());
img_mtx *= agg::trans_affine_translation(img_width/2 + 10, img_height/2 + 10 + 40);
img_mtx *= trans_affine_resizing();
img_mtx.invert();
typedef agg::span_allocator<color_type> span_alloc_type;
span_alloc_type sa;
typedef agg::span_interpolator_adaptor<agg::span_interpolator_linear<>,
periodic_distortion> interpolator_type;
periodic_distortion* dist = 0;
distortion_wave dist_wave;
distortion_swirl dist_swirl;
distortion_wave_swirl dist_wave_swirl;
distortion_swirl_wave dist_swirl_wave;
switch(m_distortion.cur_item())
{
case 0: dist = &dist_wave; break;
case 1: dist = &dist_swirl; break;
case 2: dist = &dist_wave_swirl; break;
case 3: dist = &dist_swirl_wave; break;
}
dist->period(m_period.value());
dist->amplitude(m_amplitude.value());
dist->phase(m_phase);
double cx = m_center_x;
double cy = m_center_y;
img_mtx.transform(&cx, &cy);
dist->center(cx, cy);
interpolator_type interpolator(img_mtx, *dist);
typedef agg::image_accessor_clip<pixfmt> img_source_type;
img_source_type img_src(img_pixf, agg::rgba(1,1,1));
/*
// Version without filtering (nearest neighbor)
//------------------------------------------
typedef agg::span_image_filter_rgb_nn<img_source_type,
interpolator_type> span_gen_type;
span_gen_type sg(img_src, interpolator);
//------------------------------------------
*/
// Version with "hardcoded" bilinear filter and without
// image_accessor (direct filter, the old variant)
//------------------------------------------
typedef agg::span_image_filter_rgb_bilinear_clip<pixfmt,
interpolator_type> span_gen_type;
span_gen_type sg(img_pixf, agg::rgba(1,1,1), interpolator);
//------------------------------------------
/*
// Version with arbitrary 2x2 filter
//------------------------------------------
typedef agg::span_image_filter_rgb_2x2<img_source_type,
interpolator_type> span_gen_type;
agg::image_filter<agg::image_filter_kaiser> filter;
span_gen_type sg(img_src, interpolator, filter);
//------------------------------------------
*/
/*
// Version with arbitrary filter
//------------------------------------------
typedef agg::span_image_filter_rgb<img_source_type,
interpolator_type> span_gen_type;
agg::image_filter<agg::image_filter_spline36> filter;
span_gen_type sg(img_src, interpolator, filter);
//------------------------------------------
*/
agg::rasterizer_scanline_aa<> ras;
agg::scanline_u8 sl;
double r = img_width;
if(img_height < r) r = img_height;
agg::ellipse ell(img_width / 2.0,
img_height / 2.0,
r / 2.0 - 20.0,
r / 2.0 - 20.0, 200);
agg::conv_transform<agg::ellipse> tr(ell, src_mtx);
ras.add_path(tr);
agg::render_scanlines_aa(ras, sl, rb, sa, sg);
src_mtx *= ~trans_affine_resizing();
src_mtx *= agg::trans_affine_translation(img_width - img_width/10, 0.0);
src_mtx *= trans_affine_resizing();
ras.add_path(tr);
agg::render_scanlines_aa_solid(ras, sl, rb, agg::srgba8(0,0,0));
typedef agg::span_gradient<color_type,
interpolator_type,
agg::gradient_circle,
color_array_type> gradient_span_gen;
agg::gradient_circle gradient_function;
color_array_type gradient_colors(m_gradient_colors);
gradient_span_gen span_gradient(interpolator,
gradient_function,
gradient_colors,
0, 180);
agg::trans_affine gr1_mtx;
gr1_mtx *= agg::trans_affine_translation(-img_width/2, -img_height/2);
gr1_mtx *= agg::trans_affine_scaling(0.8);
gr1_mtx *= agg::trans_affine_rotation(m_angle.value() * agg::pi / 180.0);
gr1_mtx *= agg::trans_affine_translation(img_width - img_width/10 + img_width/2 + 10,
img_height/2 + 10 + 40);
gr1_mtx *= trans_affine_resizing();
agg::trans_affine gr2_mtx;
gr2_mtx *= agg::trans_affine_rotation(m_angle.value() * agg::pi / 180.0);
gr2_mtx *= agg::trans_affine_scaling(m_scale.value());
gr2_mtx *= agg::trans_affine_translation(img_width - img_width/10 + img_width/2 + 10 + 50,
img_height/2 + 10 + 40 + 50);
gr2_mtx *= trans_affine_resizing();
gr2_mtx.invert();
cx = m_center_x + img_width - img_width/10;
cy = m_center_y;
gr2_mtx.transform(&cx, &cy);
dist->center(cx, cy);
interpolator.transformer(gr2_mtx);
agg::conv_transform<agg::ellipse> tr2(ell, gr1_mtx);
ras.add_path(tr2);
agg::render_scanlines_aa(ras, sl, rb, sa, span_gradient);
agg::render_ctrl(ras, sl, rb, m_angle);
agg::render_ctrl(ras, sl, rb, m_scale);
agg::render_ctrl(ras, sl, rb, m_amplitude);
agg::render_ctrl(ras, sl, rb, m_period);
agg::render_ctrl(ras, sl, rb, m_distortion);
}
virtual void on_draw()
{
typedef agg::renderer_base<pixfmt> ren_base;
pixfmt pixf(rbuf_window());
ren_base rbase(pixf);
trans_roundoff roundoff;
if(m_redraw_flag)
{
g_rasterizer.gamma(agg::gamma_none());
rbase.clear(agg::rgba8(255,255,255));
g_rasterizer.filling_rule(agg::fill_non_zero);
agg::render_ctrl(g_rasterizer, g_scanline, rbase, m_rotate);
agg::render_ctrl(g_rasterizer, g_scanline, rbase, m_even_odd);
agg::render_ctrl(g_rasterizer, g_scanline, rbase, m_draft);
agg::render_ctrl(g_rasterizer, g_scanline, rbase, m_roundoff);
agg::render_ctrl(g_rasterizer, g_scanline, rbase, m_angle_delta);
m_redraw_flag = false;
}
else
{
rbase.copy_bar(0,
int(32.0 * rbuf_window().height() / m_dy),
rbuf_window().width(),
rbuf_window().height(),
agg::rgba8(255,255,255));
}
if(m_draft.status())
{
g_rasterizer.gamma(agg::gamma_threshold(0.4));
}
agg::trans_affine mtx;
mtx.reset();
mtx *= agg::trans_affine_rotation(g_angle * agg::pi / 180.0);
mtx *= agg::trans_affine_translation(m_dx / 2, m_dy / 2 + 10);
mtx *= agg::trans_affine_scaling(rbuf_window().width() / m_dx,
rbuf_window().height() / m_dy);
agg::conv_transform<agg::path_storage> fill(g_path, mtx);
agg::conv_transform
<
agg::conv_transform<agg::path_storage>,
trans_roundoff
>
fill_roundoff(fill, roundoff);
agg::conv_stroke
<
agg::conv_transform<agg::path_storage>
>
stroke(fill);
agg::conv_stroke
<
agg::conv_transform
<
agg::conv_transform<agg::path_storage>,
trans_roundoff
>
>
stroke_roundoff(fill_roundoff);
g_pflag = m_even_odd.status() ? agg::fill_even_odd : agg::fill_non_zero;
unsigned i;
for(i = 0; i < g_npaths; i++)
{
g_rasterizer.filling_rule(g_pflag);
if(m_roundoff.status()) g_rasterizer.add_path(fill_roundoff, g_attr[i].index);
else g_rasterizer.add_path(fill, g_attr[i].index);
if(m_draft.status())
{
agg::render_scanlines_bin_solid(g_rasterizer, g_scanline, rbase, g_attr[i].fill_color);
}
else
{
agg::render_scanlines_aa_solid(g_rasterizer, g_scanline, rbase, g_attr[i].fill_color);
}
if(g_attr[i].stroke_width > 0.001)
{
stroke.width(g_attr[i].stroke_width * mtx.scale());
stroke_roundoff.width(g_attr[i].stroke_width * mtx.scale());
if(m_roundoff.status()) g_rasterizer.add_path(stroke_roundoff, g_attr[i].index);
else g_rasterizer.add_path(stroke, g_attr[i].index);
if(m_draft.status())
{
agg::render_scanlines_bin_solid(g_rasterizer, g_scanline, rbase, g_attr[i].stroke_color);
}
else
{
agg::render_scanlines_aa_solid(g_rasterizer, g_scanline, rbase, g_attr[i].stroke_color);
}
}
}
}
virtual void on_init()
{
m_dx = rbuf_window().width();
m_dy = rbuf_window().height();
}
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_draw()
{
typedef agg::renderer_base<agg::pixfmt_bgr24> ren_base;
agg::pixfmt_bgr24 pixf(rbuf_window());
ren_base renb(pixf);
renb.clear(agg::rgba(1, 1, 1));
m_ras.clip_box(0,0, width(), height());
agg::trans_perspective shadow_persp(m_shape_bounds.x1, m_shape_bounds.y1,
m_shape_bounds.x2, m_shape_bounds.y2,
m_shadow_ctrl.polygon());
agg::conv_transform<shape_type,
agg::trans_perspective> shadow_trans(m_shape,
shadow_persp);
// Render shadow
m_ras.add_path(shadow_trans);
agg::render_scanlines_aa_solid(m_ras, m_sl, renb, agg::rgba(0.2,0.3,0));
// Calculate the bounding box and extend it by the blur radius
agg::rect_d bbox;
agg::bounding_rect_single(shadow_trans, 0, &bbox.x1, &bbox.y1, &bbox.x2, &bbox.y2);
bbox.x1 -= m_radius.value();
bbox.y1 -= m_radius.value();
bbox.x2 += m_radius.value();
bbox.y2 += m_radius.value();
if(m_method.cur_item() == 1)
{
// The recursive blur method represents the true Gussian Blur,
// with theoretically infinite kernel. The restricted window size
// results in extra influence of edge pixels. It's impossible to
// solve correctly, but extending the right and top areas to another
// radius value produces fair result.
//------------------
bbox.x2 += m_radius.value();
bbox.y2 += m_radius.value();
}
start_timer();
if(m_method.cur_item() != 2)
{
// Create a new pixel renderer and attach it to the main one as a child image.
// It returns true if the attachment suceeded. It fails if the rectangle
// (bbox) is fully clipped.
//------------------
agg::pixfmt_bgr24 pixf2(m_rbuf2);
if(pixf2.attach(pixf, int(bbox.x1), int(bbox.y1), int(bbox.x2), int(bbox.y2)))
{
// Blur it
if(m_method.cur_item() == 0)
{
// More general method, but 30-40% slower.
//------------------
//m_stack_blur.blur(pixf2, agg::uround(m_radius.value()));
// Faster, but bore specific.
// Works only for 8 bits per channel and only with radii <= 254.
//------------------
agg::stack_blur_rgb24(pixf2, agg::uround(m_radius.value()),
agg::uround(m_radius.value()));
}
else
{
// True Gaussian Blur, 3-5 times slower than Stack Blur,
// but still constant time of radius. Very sensitive
// to precision, doubles are must here.
//------------------
m_recursive_blur.blur(pixf2, m_radius.value());
}
}
}
else
{
// Blur separate channels
//------------------
if(m_channel_r.status())
{
typedef agg::pixfmt_alpha_blend_gray<
agg::blender_gray8,
agg::rendering_buffer,
3, 2> pixfmt_gray8r;
pixfmt_gray8r pixf2r(m_rbuf2);
if(pixf2r.attach(pixf, int(bbox.x1), int(bbox.y1), int(bbox.x2), int(bbox.y2)))
{
agg::stack_blur_gray8(pixf2r, agg::uround(m_radius.value()),
agg::uround(m_radius.value()));
}
}
if(m_channel_g.status())
{
typedef agg::pixfmt_alpha_blend_gray<
agg::blender_gray8,
agg::rendering_buffer,
3, 1> pixfmt_gray8g;
pixfmt_gray8g pixf2g(m_rbuf2);
if(pixf2g.attach(pixf, int(bbox.x1), int(bbox.y1), int(bbox.x2), int(bbox.y2)))
{
agg::stack_blur_gray8(pixf2g, agg::uround(m_radius.value()),
agg::uround(m_radius.value()));
}
}
if(m_channel_b.status())
{
typedef agg::pixfmt_alpha_blend_gray<
agg::blender_gray8,
agg::rendering_buffer,
3, 0> pixfmt_gray8b;
pixfmt_gray8b pixf2b(m_rbuf2);
if(pixf2b.attach(pixf, int(bbox.x1), int(bbox.y1), int(bbox.x2), int(bbox.y2)))
{
agg::stack_blur_gray8(pixf2b, agg::uround(m_radius.value()),
agg::uround(m_radius.value()));
}
}
}
double tm = elapsed_time();
agg::render_ctrl(m_ras, m_sl, renb, m_shadow_ctrl);
// Render the shape itself
//------------------
m_ras.add_path(m_shape);
agg::render_scanlines_aa_solid(m_ras, m_sl, renb, agg::rgba(0.6,0.9,0.7, 0.8));
char buf[64];
agg::gsv_text t;
t.size(10.0);
agg::conv_stroke<agg::gsv_text> st(t);
st.width(1.5);
sprintf(buf, "%3.2f ms", tm);
t.start_point(140.0, 30.0);
t.text(buf);
m_ras.add_path(st);
agg::render_scanlines_aa_solid(m_ras, m_sl, renb, agg::rgba(0,0,0));
agg::render_ctrl(m_ras, m_sl, renb, m_method);
agg::render_ctrl(m_ras, m_sl, renb, m_radius);
agg::render_ctrl(m_ras, m_sl, renb, m_channel_r);
agg::render_ctrl(m_ras, m_sl, renb, m_channel_g);
agg::render_ctrl(m_ras, m_sl, renb, m_channel_b);
}
//------------------------------------------------------------------------
virtual void on_draw()
{
double width = rbuf_window().width();
double height = rbuf_window().height();
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_base<pixfmt_pre> renderer_base_pre;
pixfmt pixf(rbuf_window());
pixfmt_pre pixf_pre(rbuf_window());
renderer_base rb(pixf);
renderer_base_pre rb_pre(pixf_pre);
rb.clear(agg::rgba(1.0, 1.0, 1.0));
agg::trans_affine polygon_mtx;
polygon_mtx *= agg::trans_affine_translation(-m_polygon_cx, -m_polygon_cy);
polygon_mtx *= agg::trans_affine_rotation(m_polygon_angle.value() * agg::pi / 180.0);
polygon_mtx *= agg::trans_affine_scaling(m_polygon_scale.value());
polygon_mtx *= agg::trans_affine_translation(m_polygon_cx, m_polygon_cy);
double r = initial_width() / 3.0 - 8.0;
create_star(m_polygon_cx, m_polygon_cy, r, r / 1.45, 14);
agg::conv_transform<agg::path_storage> tr(m_ps, polygon_mtx);
typedef agg::wrap_mode_reflect_auto_pow2 wrap_x_type;
typedef agg::wrap_mode_reflect_auto_pow2 wrap_y_type;
typedef agg::image_accessor_wrap<pixfmt,
wrap_x_type,
wrap_y_type> img_source_type;
typedef agg::span_pattern_rgba<img_source_type> span_gen_type;
unsigned offset_x = 0;
unsigned offset_y = 0;
if(m_tie_pattern.status())
{
offset_x = unsigned(width-m_polygon_cx);
offset_y = unsigned(height-m_polygon_cy);
}
agg::span_allocator<color_type> sa;
pixfmt img_pixf(m_pattern_rbuf);
img_source_type img_src(img_pixf);
span_gen_type sg(img_src, offset_x, offset_y);
// Alpha is meaningful for RGB only because RGBA has its own
sg.alpha(span_gen_type::value_type(m_pattern_alpha.value() * 255.0));
m_ras.add_path(tr);
agg::render_scanlines_aa(m_ras, m_sl, rb_pre, sa, sg);
agg::render_ctrl(m_ras, m_sl, rb, m_polygon_angle);
agg::render_ctrl(m_ras, m_sl, rb, m_polygon_scale);
agg::render_ctrl(m_ras, m_sl, rb, m_pattern_angle);
agg::render_ctrl(m_ras, m_sl, rb, m_pattern_size);
agg::render_ctrl(m_ras, m_sl, rb, m_pattern_alpha);
agg::render_ctrl(m_ras, m_sl, rb, m_rotate_polygon);
agg::render_ctrl(m_ras, m_sl, rb, m_rotate_pattern);
agg::render_ctrl(m_ras, m_sl, rb, m_tie_pattern);
}
