scoped_glyph_positions_offset(glyph_positions & glyphs, pixel_position const& offset)
: glyphs_(glyphs)
, base_point_(glyphs.get_base_point())
, marker_pos_(glyphs.marker_pos())
{
// move the glyphs to the correct offset
glyphs_.set_base_point(base_point_ + offset);
// update the position of any marker
if (auto const& marker_info = glyphs_.get_marker())
{
glyphs_.set_marker(marker_info, marker_pos_ + offset);
}
}
void text_renderer::prepare_glyphs(glyph_positions const& positions)
{
FT_Matrix matrix;
FT_Vector pen;
FT_Error error;
glyphs_.reserve(positions.size());
for (auto const& glyph_pos : positions)
{
glyph_info const& glyph = glyph_pos.glyph;
glyph.face->set_character_sizes(glyph.format->text_size * scale_factor_); //TODO: Optimize this?
matrix.xx = static_cast<FT_Fixed>( glyph_pos.rot.cos * 0x10000L);
matrix.xy = static_cast<FT_Fixed>(-glyph_pos.rot.sin * 0x10000L);
matrix.yx = static_cast<FT_Fixed>( glyph_pos.rot.sin * 0x10000L);
matrix.yy = static_cast<FT_Fixed>( glyph_pos.rot.cos * 0x10000L);
pixel_position pos = glyph_pos.pos + glyph.offset.rotate(glyph_pos.rot);
pen.x = static_cast<FT_Pos>(pos.x * 64);
pen.y = static_cast<FT_Pos>(pos.y * 64);
FT_Face face = glyph.face->get_face();
FT_Set_Transform(face, &matrix, &pen);
error = FT_Load_Glyph(face, glyph.glyph_index, FT_LOAD_NO_HINTING);
if (error) continue;
FT_Glyph image;
error = FT_Get_Glyph(face->glyph, &image);
if (error) continue;
glyphs_.emplace_back(image, *glyph.format);
}
}
void grid_text_renderer<T>::render(glyph_positions const& pos, value_integer feature_id)
{
glyphs_.clear();
prepare_glyphs(pos);
FT_Error error;
FT_Vector start;
unsigned height = pixmap_.height();
pixel_position const& base_point = pos.get_base_point();
start.x = static_cast<FT_Pos>(base_point.x * (1 << 6));
start.y = static_cast<FT_Pos>((height - base_point.y) * (1 << 6));
// now render transformed glyphs
double halo_radius = 0.0;
for (auto & glyph : glyphs_)
{
if (glyph.properties)
{
halo_radius = glyph.properties->halo_radius * scale_factor_;
}
FT_Glyph_Transform(glyph.image, 0, &start);
error = FT_Glyph_To_Bitmap(&glyph.image, FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(glyph.image);
render_halo_id(&bit->bitmap,
feature_id,
bit->left,
height - bit->top,
static_cast<int>(halo_radius));
}
}
}
void text_renderer::prepare_glyphs(glyph_positions const& positions)
{
FT_Matrix matrix;
FT_Vector pen;
FT_Error error;
glyphs_.clear();
glyphs_.reserve(positions.size());
for (auto const& glyph_pos : positions)
{
glyph_info const& glyph = glyph_pos.glyph;
FT_Int32 load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING;
FT_Face face = glyph.face->get_face();
if (glyph.face->is_color())
{
load_flags |= FT_LOAD_COLOR ;
if (face->num_fixed_sizes > 0)
{
int scaled_size = static_cast<int>(glyph.format->text_size * scale_factor_);
int best_match = 0;
int diff = std::abs(scaled_size - face->available_sizes[0].width);
for (int i = 1; i < face->num_fixed_sizes; ++i)
{
int ndiff = std::abs(scaled_size - face->available_sizes[i].height);
if (ndiff < diff)
{
best_match = i;
diff = ndiff;
}
}
error = FT_Select_Size(face, best_match);
}
}
else
{
glyph.face->set_character_sizes(glyph.format->text_size * scale_factor_);
}
double size = glyph.format->text_size * scale_factor_;
matrix.xx = static_cast<FT_Fixed>( glyph_pos.rot.cos * 0x10000L);
matrix.xy = static_cast<FT_Fixed>(-glyph_pos.rot.sin * 0x10000L);
matrix.yx = static_cast<FT_Fixed>( glyph_pos.rot.sin * 0x10000L);
matrix.yy = static_cast<FT_Fixed>( glyph_pos.rot.cos * 0x10000L);
pixel_position pos = glyph_pos.pos + glyph.offset.rotate(glyph_pos.rot);
pen.x = static_cast<FT_Pos>(pos.x * 64);
pen.y = static_cast<FT_Pos>(pos.y * 64);
FT_Set_Transform(face, &matrix, &pen);
error = FT_Load_Glyph(face, glyph.glyph_index, load_flags);
if (error) continue;
FT_Glyph image;
error = FT_Get_Glyph(face->glyph, &image);
if (error) continue;
box2d<double> bbox(0, glyph_pos.glyph.ymin(), glyph_pos.glyph.advance(), glyph_pos.glyph.ymax());
glyphs_.emplace_back(image, *glyph.format, pos, glyph_pos.rot, size, bbox);
}
}
void grid_text_renderer<T>::render(glyph_positions const& pos, value_integer feature_id)
{
prepare_glyphs(pos);
FT_Error error;
FT_Vector start;
unsigned height = pixmap_.height();
pixel_position const& base_point = pos.get_base_point();
start.x = static_cast<FT_Pos>(base_point.x * (1 << 6));
start.y = static_cast<FT_Pos>((height - base_point.y) * (1 << 6));
start.x += transform_.tx * 64;
start.y += transform_.ty * 64;
// now render transformed glyphs
double halo_radius = 0.0;
FT_Matrix halo_matrix;
halo_matrix.xx = halo_transform_.sx * 0x10000L;
halo_matrix.xy = halo_transform_.shx * 0x10000L;
halo_matrix.yy = halo_transform_.sy * 0x10000L;
halo_matrix.yx = halo_transform_.shy * 0x10000L;
for (auto & glyph : glyphs_)
{
halo_radius = glyph.properties.halo_radius * scale_factor_;
FT_Glyph_Transform(glyph.image, &halo_matrix, &start);
error = FT_Glyph_To_Bitmap(&glyph.image, FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(glyph.image);
if (bit->bitmap.pixel_mode == FT_PIXEL_MODE_BGRA)
{
pixel_position render_pos(base_point);
image_rgba8 glyph_image(render_glyph_image(glyph,
bit->bitmap,
transform_,
render_pos));
const constexpr std::size_t pixel_size = sizeof(image_rgba8::pixel_type);
render_halo_id<pixel_size>(glyph_image.bytes(),
glyph_image.width(),
glyph_image.height(),
feature_id,
render_pos.x, render_pos.y,
static_cast<int>(halo_radius));
}
else
{
render_halo_id<1>(bit->bitmap.buffer,
bit->bitmap.width,
bit->bitmap.rows,
feature_id,
bit->left,
height - bit->top,
static_cast<int>(halo_radius));
}
}
FT_Done_Glyph(glyph.image);
}
}
void grid_text_renderer<T>::render(glyph_positions const& pos, value_integer feature_id)
{
prepare_glyphs(pos);
FT_Error error;
FT_Vector start;
unsigned height = pixmap_.height();
pixel_position const& base_point = pos.get_base_point();
start.x = static_cast<FT_Pos>(base_point.x * (1 << 6));
start.y = static_cast<FT_Pos>((height - base_point.y) * (1 << 6));
start.x += transform_.tx * 64;
start.y += transform_.ty * 64;
// now render transformed glyphs
double halo_radius = 0.0;
FT_Matrix halo_matrix;
halo_matrix.xx = halo_transform_.sx * 0x10000L;
halo_matrix.xy = halo_transform_.shx * 0x10000L;
halo_matrix.yy = halo_transform_.sy * 0x10000L;
halo_matrix.yx = halo_transform_.shy * 0x10000L;
for (auto & glyph : glyphs_)
{
halo_radius = glyph.properties.halo_radius * scale_factor_;
FT_Glyph_Transform(glyph.image, &halo_matrix, &start);
error = FT_Glyph_To_Bitmap(&glyph.image, FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(glyph.image);
render_halo_id(&bit->bitmap,
feature_id,
bit->left,
height - bit->top,
static_cast<int>(halo_radius));
}
FT_Done_Glyph(glyph.image);
}
}
void agg_text_renderer<T>::render(glyph_positions const& pos)
{
glyphs_.clear();
prepare_glyphs(pos);
FT_Error error;
FT_Vector start;
FT_Vector start_halo;
int height = pixmap_.height();
pixel_position const& base_point = pos.get_base_point();
start.x = static_cast<FT_Pos>(base_point.x * (1 << 6));
start.y = static_cast<FT_Pos>((height - base_point.y) * (1 << 6));
start_halo = start;
start.x += transform_.tx * 64;
start.y += transform_.ty * 64;
start_halo.x += halo_transform_.tx * 64;
start_halo.y += halo_transform_.ty * 64;
FT_Matrix halo_matrix;
halo_matrix.xx = halo_transform_.sx * 0x10000L;
halo_matrix.xy = halo_transform_.shx * 0x10000L;
halo_matrix.yy = halo_transform_.sy * 0x10000L;
halo_matrix.yx = halo_transform_.shy * 0x10000L;
FT_Matrix matrix;
matrix.xx = transform_.sx * 0x10000L;
matrix.xy = transform_.shx * 0x10000L;
matrix.yy = transform_.sy * 0x10000L;
matrix.yx = transform_.shy * 0x10000L;
// default formatting
double halo_radius = 0;
color black(0,0,0);
unsigned fill = black.rgba();
unsigned halo_fill = black.rgba();
double text_opacity = 1.0;
double halo_opacity = 1.0;
for (auto const& glyph : glyphs_)
{
halo_fill = glyph.properties.halo_fill.rgba();
halo_opacity = glyph.properties.halo_opacity;
halo_radius = glyph.properties.halo_radius * scale_factor_;
// make sure we've got reasonable values.
if (halo_radius <= 0.0 || halo_radius > 1024.0) continue;
FT_Glyph g;
error = FT_Glyph_Copy(glyph.image, &g);
if (!error)
{
FT_Glyph_Transform(g, &halo_matrix, &start_halo);
if (rasterizer_ == HALO_RASTERIZER_FULL)
{
stroker_->init(halo_radius);
FT_Glyph_Stroke(&g, stroker_->get(), 1);
error = FT_Glyph_To_Bitmap(&g, FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(g);
composite_bitmap(pixmap_,
&bit->bitmap,
halo_fill,
bit->left,
height - bit->top,
halo_opacity,
halo_comp_op_);
}
}
else
{
error = FT_Glyph_To_Bitmap(&g, FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(g);
render_halo(&bit->bitmap,
halo_fill,
bit->left,
height - bit->top,
halo_radius,
halo_opacity,
halo_comp_op_);
}
}
}
FT_Done_Glyph(g);
}
// render actual text
for (auto & glyph : glyphs_)
{
fill = glyph.properties.fill.rgba();
text_opacity = glyph.properties.text_opacity;
FT_Glyph_Transform(glyph.image, &matrix, &start);
error = FT_Glyph_To_Bitmap(&glyph.image ,FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(glyph.image);
composite_bitmap(pixmap_,
&bit->bitmap,
fill,
bit->left,
height - bit->top,
text_opacity,
comp_op_);
}
FT_Done_Glyph(glyph.image);
}
}
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));
}
}
void agg_text_renderer<T>::render(glyph_positions const& pos)
{
glyphs_.clear();
prepare_glyphs(pos);
FT_Error error;
FT_Vector start;
int height = pixmap_.height();
pixel_position const& base_point = pos.get_base_point();
start.x = static_cast<FT_Pos>(base_point.x * (1 << 6));
start.y = static_cast<FT_Pos>((height - base_point.y) * (1 << 6));
//render halo
double halo_radius = 0;
char_properties_ptr format;
for (auto const& glyph : glyphs_)
{
if (glyph.properties)
{
format = glyph.properties;
// Settings have changed.
halo_radius = glyph.properties->halo_radius * scale_factor_;
}
// make sure we've got reasonable values.
if (halo_radius <= 0.0 || halo_radius > 1024.0) continue;
FT_Glyph g;
error = FT_Glyph_Copy(glyph.image, &g);
if (!error)
{
FT_Glyph_Transform(g,0,&start);
if (rasterizer_ == HALO_RASTERIZER_FULL)
{
stroker_->init(halo_radius);
FT_Glyph_Stroke(&g, stroker_->get(), 1);
error = FT_Glyph_To_Bitmap(&g, FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(g);
composite_bitmap(pixmap_,
&bit->bitmap,
format->halo_fill.rgba(),
bit->left,
height - bit->top,
format->text_opacity,
comp_op_);
}
}
else
{
error = FT_Glyph_To_Bitmap(&g, FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(g);
render_halo(&bit->bitmap,
format->halo_fill.rgba(),
bit->left,
height - bit->top,
halo_radius,
format->text_opacity,
comp_op_);
}
}
}
FT_Done_Glyph(g);
}
// render actual text
for (auto & glyph : glyphs_)
{
if (glyph.properties)
{
format = glyph.properties;
}
FT_Glyph_Transform(glyph.image, 0, &start);
error = FT_Glyph_To_Bitmap(&glyph.image ,FT_RENDER_MODE_NORMAL,0,1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(glyph.image);
composite_bitmap(pixmap_,
&bit->bitmap,
format->fill.rgba(),
bit->left,
height - bit->top,
format->text_opacity,
comp_op_);
}
}
}
void agg_text_renderer<T>::render(glyph_positions const& pos)
{
prepare_glyphs(pos);
FT_Error error;
FT_Vector start;
FT_Vector start_halo;
int height = pixmap_.height();
pixel_position const& base_point = pos.get_base_point();
start.x = static_cast<FT_Pos>(base_point.x * (1 << 6));
start.y = static_cast<FT_Pos>((height - base_point.y) * (1 << 6));
start_halo = start;
start.x += transform_.tx * 64;
start.y += transform_.ty * 64;
start_halo.x += halo_transform_.tx * 64;
start_halo.y += halo_transform_.ty * 64;
FT_Matrix halo_matrix;
halo_matrix.xx = halo_transform_.sx * 0x10000L;
halo_matrix.xy = halo_transform_.shx * 0x10000L;
halo_matrix.yy = halo_transform_.sy * 0x10000L;
halo_matrix.yx = halo_transform_.shy * 0x10000L;
FT_Matrix matrix;
matrix.xx = transform_.sx * 0x10000L;
matrix.xy = transform_.shx * 0x10000L;
matrix.yy = transform_.sy * 0x10000L;
matrix.yx = transform_.shy * 0x10000L;
// default formatting
double halo_radius = 0;
color black(0,0,0);
unsigned fill = black.rgba();
unsigned halo_fill = black.rgba();
double text_opacity = 1.0;
double halo_opacity = 1.0;
for (auto const& glyph : glyphs_)
{
halo_fill = glyph.properties.halo_fill.rgba();
halo_opacity = glyph.properties.halo_opacity;
halo_radius = glyph.properties.halo_radius * scale_factor_;
// make sure we've got reasonable values.
if (halo_radius <= 0.0 || halo_radius > 1024.0) continue;
FT_Glyph g;
error = FT_Glyph_Copy(glyph.image, &g);
if (!error)
{
FT_Glyph_Transform(g, &halo_matrix, &start_halo);
if (rasterizer_ == HALO_RASTERIZER_FULL)
{
stroker_->init(halo_radius);
FT_Glyph_Stroke(&g, stroker_->get(), 1);
error = FT_Glyph_To_Bitmap(&g, FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(g);
if (bit->bitmap.pixel_mode != FT_PIXEL_MODE_BGRA)
{
composite_bitmap(pixmap_,
&bit->bitmap,
halo_fill,
bit->left,
height - bit->top,
halo_opacity,
halo_comp_op_);
}
}
}
else
{
error = FT_Glyph_To_Bitmap(&g, FT_RENDER_MODE_NORMAL, 0, 1);
if (error)
{
continue;
}
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(g);
if (bit->bitmap.pixel_mode == FT_PIXEL_MODE_BGRA)
{
pixel_position render_pos(base_point);
image_rgba8 glyph_image(render_glyph_image(glyph,
bit->bitmap,
transform_,
render_pos));
const constexpr std::size_t pixel_size = sizeof(image_rgba8::pixel_type);
render_halo<pixel_size>(glyph_image.bytes(),
glyph_image.width(),
glyph_image.height(),
halo_fill,
render_pos.x, render_pos.y,
halo_radius,
halo_opacity,
halo_comp_op_);
}
else
{
render_halo<1>(bit->bitmap.buffer,
bit->bitmap.width,
bit->bitmap.rows,
halo_fill,
bit->left,
height - bit->top,
halo_radius,
halo_opacity,
halo_comp_op_);
}
}
}
FT_Done_Glyph(g);
}
// render actual text
for (auto & glyph : glyphs_)
{
fill = glyph.properties.fill.rgba();
text_opacity = glyph.properties.text_opacity;
FT_Glyph_Transform(glyph.image, &matrix, &start);
error = 0;
if ( glyph.image->format != FT_GLYPH_FORMAT_BITMAP )
{
error = FT_Glyph_To_Bitmap(&glyph.image ,FT_RENDER_MODE_NORMAL, 0, 1);
}
if (error == 0)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(glyph.image);
int pixel_mode = bit->bitmap.pixel_mode;
if (pixel_mode == FT_PIXEL_MODE_BGRA)
{
int x = base_point.x + glyph.pos.x;
int y = base_point.y - glyph.pos.y;
agg::trans_affine transform(
glyph_transform(transform_,
bit->bitmap.rows,
x, y,
-glyph.rot.angle(),
glyph.bbox));
composite_color_glyph(pixmap_,
bit->bitmap,
transform,
text_opacity,
comp_op_);
}
else
{
composite_bitmap(pixmap_,
&bit->bitmap,
fill,
bit->left,
height - bit->top,
text_opacity,
comp_op_);
}
}
FT_Done_Glyph(glyph.image);
}
}