void cairo_context::add_text(text_path const& path,
cairo_face_manager & manager,
face_manager<freetype_engine> & font_manager,
double scale_factor)
{
double sx = path.center.x;
double sy = path.center.y;
path.rewind();
for (int iii = 0; iii < path.num_nodes(); iii++)
{
char_info_ptr c;
double x, y, angle;
path.vertex(&c, &x, &y, &angle);
face_set_ptr faces = font_manager.get_face_set(c->format->face_name, c->format->fontset);
double text_size = c->format->text_size * scale_factor;
faces->set_character_sizes(text_size);
glyph_ptr glyph = faces->get_glyph(c->c);
if (glyph)
{
cairo_matrix_t matrix;
matrix.xx = text_size * cos(angle);
matrix.xy = text_size * sin(angle);
matrix.yx = text_size * -sin(angle);
matrix.yy = text_size * cos(angle);
matrix.x0 = 0;
matrix.y0 = 0;
set_font_matrix(matrix);
set_font_face(manager, glyph->get_face());
glyph_path(glyph->get_index(), sx + x, sy - y);
set_line_width(2.0 * c->format->halo_radius * scale_factor);
set_line_join(ROUND_JOIN);
set_color(c->format->halo_fill);
stroke();
set_color(c->format->fill);
show_glyph(glyph->get_index(), sx + x, sy - y);
}
}
}
void cairo_context::add_text(glyph_positions const& pos,
cairo_face_manager & manager,
composite_mode_e comp_op,
composite_mode_e halo_comp_op,
double scale_factor)
{
pixel_position const& base_point = pos.get_base_point();
const double sx = base_point.x;
const double sy = base_point.y;
for (auto const& glyph_pos : pos)
{
glyph_info const& glyph = glyph_pos.glyph;
glyph.face->set_character_sizes(glyph.format->text_size * scale_factor);
}
//render halo
double halo_radius = 0;
set_operator(halo_comp_op);
for (auto const& glyph_pos : pos)
{
glyph_info const& glyph = glyph_pos.glyph;
halo_radius = glyph.format->halo_radius * scale_factor;
// make sure we've got reasonable values.
if (halo_radius <= 0.0 || halo_radius > 1024.0) continue;
double text_size = glyph.format->text_size * scale_factor;
cairo_matrix_t matrix;
matrix.xx = text_size * glyph_pos.rot.cos;
matrix.xy = text_size * glyph_pos.rot.sin;
matrix.yx = text_size * -glyph_pos.rot.sin;
matrix.yy = text_size * glyph_pos.rot.cos;
matrix.x0 = 0;
matrix.y0 = 0;
set_font_matrix(matrix);
set_font_face(manager, glyph.face);
pixel_position new_pos = glyph_pos.pos + glyph.offset.rotate(glyph_pos.rot);
glyph_path(glyph.glyph_index, pixel_position(sx + new_pos.x, sy - new_pos.y));
set_line_width(2.0 * halo_radius);
set_line_join(ROUND_JOIN);
set_color(glyph.format->halo_fill, glyph.format->halo_opacity);
stroke();
}
set_operator(comp_op);
for (auto const& glyph_pos : pos)
{
glyph_info const& glyph = glyph_pos.glyph;
double text_size = glyph.format->text_size * scale_factor;
cairo_matrix_t matrix;
matrix.xx = text_size * glyph_pos.rot.cos;
matrix.xy = text_size * glyph_pos.rot.sin;
matrix.yx = text_size * -glyph_pos.rot.sin;
matrix.yy = text_size * glyph_pos.rot.cos;
matrix.x0 = 0;
matrix.y0 = 0;
set_font_matrix(matrix);
set_font_face(manager, glyph.face);
pixel_position new_pos = glyph_pos.pos + glyph.offset.rotate(glyph_pos.rot);
set_color(glyph.format->fill, glyph.format->text_opacity);
show_glyph(glyph.glyph_index, pixel_position(sx + new_pos.x, sy - new_pos.y));
}
}