virtual void on_draw()
{
if(m_gamma.value() != m_old_gamma)
{
m_gamma_lut.gamma(m_gamma.value());
load_img(0, "spheres");
pixfmt pixf(rbuf_img(0));
pixf.apply_gamma_dir(m_gamma_lut);
m_old_gamma = m_gamma.value();
}
pixfmt pixf(rbuf_window());
pixfmt_pre pixf_pre(rbuf_window());
renderer_base rb(pixf);
renderer_base_pre rb_pre(pixf_pre);
renderer_solid r(rb);
rb.clear(agg::rgba(1, 1, 1));
if(m_trans_type.cur_item() < 2)
{
// For the affine parallelogram transformations we
// calculate the 4-th (implicit) point of the parallelogram
m_quad.xn(3) = m_quad.xn(0) + (m_quad.xn(2) - m_quad.xn(1));
m_quad.yn(3) = m_quad.yn(0) + (m_quad.yn(2) - m_quad.yn(1));
}
//--------------------------
// Render the "quad" tool and controls
g_rasterizer.add_path(m_quad);
r.color(agg::rgba(0, 0.3, 0.5, 0.1));
agg::render_scanlines(g_rasterizer, g_scanline, r);
// Prepare the polygon to rasterize. Here we need to fill
// the destination (transformed) polygon.
g_rasterizer.clip_box(0, 0, width(), height());
g_rasterizer.reset();
int b = 0;
g_rasterizer.move_to_d(m_quad.xn(0)-b, m_quad.yn(0)-b);
g_rasterizer.line_to_d(m_quad.xn(1)+b, m_quad.yn(1)-b);
g_rasterizer.line_to_d(m_quad.xn(2)+b, m_quad.yn(2)+b);
g_rasterizer.line_to_d(m_quad.xn(3)-b, m_quad.yn(3)+b);
typedef agg::span_allocator<color_type> span_alloc_type;
span_alloc_type sa;
agg::image_filter_bilinear filter_kernel;
agg::image_filter_lut filter(filter_kernel, true);
pixfmt pixf_img(rbuf_img(0));
typedef agg::image_accessor_clone<pixfmt> source_type;
source_type source(pixf_img);
start_timer();
switch(m_trans_type.cur_item())
{
case 0:
{
agg::trans_affine tr(m_quad.polygon(), g_x1, g_y1, g_x2, g_y2);
typedef agg::span_interpolator_linear<agg::trans_affine> interpolator_type;
interpolator_type interpolator(tr);
typedef image_filter_2x2_type<source_type,
interpolator_type> span_gen_type;
span_gen_type sg(source, interpolator, filter);
agg::render_scanlines_aa(g_rasterizer, g_scanline, rb_pre, sa, sg);
break;
}
case 1:
{
agg::trans_affine tr(m_quad.polygon(), g_x1, g_y1, g_x2, g_y2);
typedef agg::span_interpolator_linear<agg::trans_affine> interpolator_type;
typedef image_resample_affine_type<source_type> span_gen_type;
interpolator_type interpolator(tr);
span_gen_type sg(source, interpolator, filter);
sg.blur(m_blur.value());
agg::render_scanlines_aa(g_rasterizer, g_scanline, rb_pre, sa, sg);
break;
}
case 2:
{
agg::trans_perspective tr(m_quad.polygon(), g_x1, g_y1, g_x2, g_y2);
if(tr.is_valid())
{
typedef agg::span_interpolator_linear_subdiv<agg::trans_perspective> interpolator_type;
interpolator_type interpolator(tr);
typedef image_filter_2x2_type<source_type,
interpolator_type> span_gen_type;
span_gen_type sg(source, interpolator, filter);
agg::render_scanlines_aa(g_rasterizer, g_scanline, rb_pre, sa, sg);
}
break;
}
case 3:
{
agg::trans_perspective tr(m_quad.polygon(), g_x1, g_y1, g_x2, g_y2);
if(tr.is_valid())
{
typedef agg::span_interpolator_trans<agg::trans_perspective> interpolator_type;
interpolator_type interpolator(tr);
typedef image_filter_2x2_type<source_type,
interpolator_type> span_gen_type;
span_gen_type sg(source, interpolator, filter);
agg::render_scanlines_aa(g_rasterizer, g_scanline, rb_pre, sa, sg);
}
break;
}
case 4:
{
typedef agg::span_interpolator_persp_lerp<> interpolator_type;
typedef agg::span_subdiv_adaptor<interpolator_type> subdiv_adaptor_type;
interpolator_type interpolator(m_quad.polygon(), g_x1, g_y1, g_x2, g_y2);
subdiv_adaptor_type subdiv_adaptor(interpolator);
if(interpolator.is_valid())
{
typedef image_resample_type<source_type,
subdiv_adaptor_type> span_gen_type;
span_gen_type sg(source, subdiv_adaptor, filter);
sg.blur(m_blur.value());
agg::render_scanlines_aa(g_rasterizer, g_scanline, rb_pre, sa, sg);
}
break;
}
case 5:
{
typedef agg::span_interpolator_persp_exact<> interpolator_type;
typedef agg::span_subdiv_adaptor<interpolator_type> subdiv_adaptor_type;
interpolator_type interpolator(m_quad.polygon(), g_x1, g_y1, g_x2, g_y2);
subdiv_adaptor_type subdiv_adaptor(interpolator);
if(interpolator.is_valid())
{
typedef image_resample_type<source_type,
subdiv_adaptor_type> span_gen_type;
span_gen_type sg(source, subdiv_adaptor, filter);
sg.blur(m_blur.value());
agg::render_scanlines_aa(g_rasterizer, g_scanline, rb_pre, sa, sg);
}
break;
}
}
double tm = elapsed_time();
pixf.apply_gamma_inv(m_gamma_lut);
char buf[64];
agg::gsv_text t;
t.size(10.0);
agg::conv_stroke<agg::gsv_text> pt(t);
pt.width(1.5);
sprintf(buf, "%3.2f ms", tm);
t.start_point(10.0, 70.0);
t.text(buf);
g_rasterizer.add_path(pt);
r.color(agg::rgba(0,0,0));
agg::render_scanlines(g_rasterizer, g_scanline, r);
//--------------------------
agg::render_ctrl(g_rasterizer, g_scanline, rb, m_trans_type);
agg::render_ctrl(g_rasterizer, g_scanline, rb, m_gamma);
agg::render_ctrl(g_rasterizer, g_scanline, rb, m_blur);
}
//------------------------------------------------------------------------
virtual void on_draw() {
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_solid;
pixfmt pixf(rbuf_window());
pixfmt pixf_img(rbuf_img(0));
renderer_base rb(pixf);
renderer_solid rs(rb);
rb.clear(agg::rgba(1.0, 1.0, 1.0));
agg::trans_affine image_mtx;
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);
switch (m_example.cur_item()) {
default:
case 0:
// --------------(Example 0, Identity matrix)
break;
case 1:
// --------------(Example 1)
image_mtx *=
agg::trans_affine_translation(-m_image_center_x, -m_image_center_y);
image_mtx *= agg::trans_affine_rotation(m_polygon_angle.value() *
agg::pi / 180.0);
image_mtx *= agg::trans_affine_scaling(m_polygon_scale.value());
image_mtx *= agg::trans_affine_translation(m_polygon_cx, m_polygon_cy);
image_mtx.invert();
break;
case 2:
// --------------(Example 2)
image_mtx *=
agg::trans_affine_translation(-m_image_center_x, -m_image_center_y);
image_mtx *=
agg::trans_affine_rotation(m_image_angle.value() * agg::pi / 180.0);
image_mtx *= agg::trans_affine_scaling(m_image_scale.value());
image_mtx *= agg::trans_affine_translation(m_image_cx, m_image_cy);
image_mtx.invert();
break;
case 3:
// --------------(Example 3)
image_mtx *=
agg::trans_affine_translation(-m_image_center_x, -m_image_center_y);
image_mtx *=
agg::trans_affine_rotation(m_image_angle.value() * agg::pi / 180.0);
image_mtx *= agg::trans_affine_scaling(m_image_scale.value());
image_mtx *= agg::trans_affine_translation(m_polygon_cx, m_polygon_cy);
image_mtx.invert();
break;
case 4:
// --------------(Example 4)
image_mtx *= agg::trans_affine_translation(-m_image_cx, -m_image_cy);
image_mtx *= agg::trans_affine_rotation(m_polygon_angle.value() *
agg::pi / 180.0);
image_mtx *= agg::trans_affine_scaling(m_polygon_scale.value());
image_mtx *= agg::trans_affine_translation(m_polygon_cx, m_polygon_cy);
image_mtx.invert();
break;
case 5:
// --------------(Example 5)
image_mtx *=
agg::trans_affine_translation(-m_image_center_x, -m_image_center_y);
image_mtx *=
agg::trans_affine_rotation(m_image_angle.value() * agg::pi / 180.0);
image_mtx *= agg::trans_affine_rotation(m_polygon_angle.value() *
agg::pi / 180.0);
image_mtx *= agg::trans_affine_scaling(m_image_scale.value());
image_mtx *= agg::trans_affine_scaling(m_polygon_scale.value());
image_mtx *= agg::trans_affine_translation(m_image_cx, m_image_cy);
image_mtx.invert();
break;
case 6:
// --------------(Example 6)
image_mtx *= agg::trans_affine_translation(-m_image_cx, -m_image_cy);
image_mtx *=
agg::trans_affine_rotation(m_image_angle.value() * agg::pi / 180.0);
image_mtx *= agg::trans_affine_scaling(m_image_scale.value());
image_mtx *= agg::trans_affine_translation(m_image_cx, m_image_cy);
image_mtx.invert();
break;
}
typedef agg::span_interpolator_linear<> interpolator_type;
interpolator_type interpolator(image_mtx);
agg::span_allocator<color_type> sa;
// "hardcoded" bilinear filter
//------------------------------------------
typedef agg::span_image_filter_rgba_bilinear_clip<pixfmt, interpolator_type>
span_gen_type;
span_gen_type sg(pixf_img, agg::rgba(1, 1, 1), interpolator);
//------------------------------------------
agg::rasterizer_scanline_aa<> ras;
agg::scanline_u8 sl;
agg::path_storage ps;
create_star(ps);
agg::conv_transform<agg::path_storage> tr(ps, polygon_mtx);
ras.add_path(tr);
agg::render_scanlines_aa(ras, sl, rb, sa, sg);
agg::ellipse e1(m_image_cx, m_image_cy, 5, 5, 20);
agg::ellipse e2(m_image_cx, m_image_cy, 2, 2, 20);
agg::conv_stroke<agg::ellipse> c1(e1);
rs.color(agg::rgba(0.7, 0.8, 0));
ras.add_path(e1);
agg::render_scanlines(ras, sl, rs);
rs.color(agg::rgba(0, 0, 0));
ras.add_path(c1);
agg::render_scanlines(ras, sl, rs);
ras.add_path(e2);
agg::render_scanlines(ras, sl, rs);
agg::render_ctrl(ras, sl, rb, m_polygon_angle);
agg::render_ctrl(ras, sl, rb, m_polygon_scale);
agg::render_ctrl(ras, sl, rb, m_image_angle);
agg::render_ctrl(ras, sl, rb, m_image_scale);
agg::render_ctrl(ras, sl, rb, m_rotate_polygon);
agg::render_ctrl(ras, sl, rb, m_rotate_image);
agg::render_ctrl(ras, sl, rb, m_example);
}
