virtual void on_draw()
{
typedef agg::renderer_base<pixfmt_pre> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_scanline;
typedef agg::scanline_u8 scanline;
pixfmt_pre pixf(rbuf_window());
renderer_base ren_base(pixf);
ren_base.clear(agg::rgba(1.0, 1.0, 0.95));
renderer_scanline ren(ren_base);
agg::rasterizer_scanline_aa<agg::rasterizer_sl_clip_dbl> ras;
agg::scanline_u8 sl;
agg::conv_transform<agg::compound_shape> shape(m_shape, m_scale);
agg::conv_stroke<agg::conv_transform<agg::compound_shape> > stroke(shape);
m_shape.approximation_scale(m_scale.scale());
unsigned i;
agg::path_storage tmp_path;
ras.clip_box(0, 0, width(), height());
// This is an alternative method of Flash rasterization.
// We decompose the compound shape into separate paths
// and select the ones that fit the given style (left or right).
// So that, we form a sub-shape and draw it as a whole.
//
// Here the regular scanline rasterizer is used, but it doesn't
// automatically close the polygons. So that, the rasterizer
// actually works with a set of polylines instead of polygons.
// Of course, the data integrity must be preserved, that is,
// the polylines must eventually form a closed contour
// (or a set of closed contours). So that, first we set
// auto_close(false);
//
// The second important thing is that one path can be rasterized
// twice, if it has both, left and right fill. Sometimes the
// path has equal left and right fill, so that, the same path
// will be added twice even for a single sub-shape. If the
// rasterizer can tolerate these degenerates you can add them,
// but it's also fine just to omit them.
//
// The third thing is that for one side (left or right)
// you should invert the direction of the paths.
//
// The main disadvantage of this method is imperfect stitching
// of the adjacent polygons. The problem can be solved if we use
// compositing operation "plus" instead of alpha-blend. But
// in this case we are forced to use an RGBA buffer, clean it with
// zero, rasterize using "plus" operation, and then alpha-blend
// the result over the final scene. It can be too expensive.
//------------------------------------------------------------
ras.auto_close(false);
//ras.filling_rule(agg::fill_even_odd);
start_timer();
for(int s = m_shape.min_style(); s <= m_shape.max_style(); s++)
{
ras.reset();
for(i = 0; i < m_shape.paths(); i++)
{
const agg::path_style& style = m_shape.style(i);
if(style.left_fill != style.right_fill)
{
if(style.left_fill == s)
{
ras.add_path(shape, style.path_id);
}
if(style.right_fill == s)
{
tmp_path.remove_all();
tmp_path.concat_path(shape, style.path_id);
tmp_path.invert_polygon(0);
ras.add_path(tmp_path);
}
}
}
agg::render_scanlines_aa_solid(ras, sl, ren_base, m_colors[s]);
}
double tfill = elapsed_time();
ras.auto_close(true);
// Draw strokes
//----------------------
start_timer();
stroke.width(sqrt(m_scale.scale()));
stroke.line_join(agg::round_join);
stroke.line_cap(agg::round_cap);
for(i = 0; i < m_shape.paths(); i++)
{
ras.reset();
if(m_shape.style(i).line >= 0)
{
ras.add_path(stroke, m_shape.style(i).path_id);
ren.color(agg::srgba8(0,0,0, 128));
agg::render_scanlines(ras, sl, ren);
}
}
double tstroke = elapsed_time();
char buf[256];
agg::gsv_text t;
t.size(8.0);
t.flip(true);
agg::conv_stroke<agg::gsv_text> ts(t);
ts.width(1.6);
ts.line_cap(agg::round_cap);
sprintf(buf, "Fill=%.2fms (%dFPS) Stroke=%.2fms (%dFPS) Total=%.2fms (%dFPS)\n\n"
"Space: Next Shape\n\n"
"+/- : ZoomIn/ZoomOut (with respect to the mouse pointer)",
tfill, int(1000.0 / tfill),
tstroke, int(1000.0 / tstroke),
tfill+tstroke, int(1000.0 / (tfill+tstroke)));
t.start_point(10.0, 20.0);
t.text(buf);
ras.add_path(ts);
ren.color(agg::rgba(0,0,0));
agg::render_scanlines(ras, sl, ren);
}
virtual void on_draw()
{
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_scanline;
typedef agg::scanline_u8 scanline;
pixfmt pixf(rbuf_window());
renderer_base ren_base(pixf);
ren_base.clear(agg::rgba(1.0, 1.0, 0.95));
renderer_scanline ren(ren_base);
unsigned i;
unsigned w = unsigned(width());
m_gradient.resize(w);
agg::rgba8 c1(255, 0, 0, 180);
agg::rgba8 c2(0, 0, 255, 180);
for(i = 0; i < w; i++)
{
m_gradient[i] = c1.gradient(c2, i / width());
m_gradient[i].premultiply();
}
agg::rasterizer_scanline_aa<agg::rasterizer_sl_clip_dbl> ras;
agg::rasterizer_compound_aa<agg::rasterizer_sl_clip_dbl> rasc;
agg::scanline_u8 sl;
agg::scanline_bin sl_bin;
agg::conv_transform<agg::compound_shape> shape(m_shape, m_scale);
agg::conv_stroke<agg::conv_transform<agg::compound_shape> > stroke(shape);
agg::test_styles style_handler(m_colors, m_gradient.data());
agg::span_allocator<agg::rgba8> alloc;
m_shape.approximation_scale(m_scale.scale());
// Fill shape
//----------------------
rasc.clip_box(0, 0, width(), height());
rasc.reset();
//rasc.filling_rule(agg::fill_even_odd);
start_timer();
for(i = 0; i < m_shape.paths(); i++)
{
if(m_shape.style(i).left_fill >= 0 ||
m_shape.style(i).right_fill >= 0)
{
rasc.styles(m_shape.style(i).left_fill,
m_shape.style(i).right_fill);
rasc.add_path(shape, m_shape.style(i).path_id);
}
}
agg::render_scanlines_compound(rasc, sl, sl_bin, ren_base, alloc, style_handler);
double tfill = elapsed_time();
// Hit-test test
bool draw_strokes = true;
if(m_hit_x >= 0 && m_hit_y >= 0)
{
if(rasc.hit_test(m_hit_x, m_hit_y))
{
draw_strokes = false;
}
}
// Draw strokes
//----------------------
start_timer();
if(draw_strokes)
{
ras.clip_box(0, 0, width(), height());
stroke.width(sqrt(m_scale.scale()));
stroke.line_join(agg::round_join);
stroke.line_cap(agg::round_cap);
for(i = 0; i < m_shape.paths(); i++)
{
ras.reset();
if(m_shape.style(i).line >= 0)
{
ras.add_path(stroke, m_shape.style(i).path_id);
ren.color(agg::rgba8(0,0,0, 128));
agg::render_scanlines(ras, sl, ren);
}
}
}
double tstroke = elapsed_time();
char buf[256];
agg::gsv_text t;
t.size(8.0);
t.flip(true);
agg::conv_stroke<agg::gsv_text> ts(t);
ts.width(1.6);
ts.line_cap(agg::round_cap);
sprintf(buf, "Fill=%.2fms (%dFPS) Stroke=%.2fms (%dFPS) Total=%.2fms (%dFPS)\n\n"
"Space: Next Shape\n\n"
"+/- : ZoomIn/ZoomOut (with respect to the mouse pointer)",
tfill, int(1000.0 / tfill),
tstroke, int(1000.0 / tstroke),
tfill+tstroke, int(1000.0 / (tfill+tstroke)));
t.start_point(10.0, 20.0);
t.text(buf);
ras.add_path(ts);
ren.color(agg::rgba(0,0,0));
agg::render_scanlines(ras, sl, ren);
if(m_gamma.gamma() != 1.0)
{
pixf.apply_gamma_inv(m_gamma);
}
}