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Implement new prepare glyphs function.

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This commit is contained in:
Hermann Kraus 2012-07-09 22:35:02 +02:00
parent 514a0da09e
commit a8ba813423
2 changed files with 80 additions and 74 deletions
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24
include/mapnik/text/renderer.hpp
View file

@ -22,21 +22,37 @@ extern "C"
namespace mapnik
{
template <typename T>
struct text_renderer : private boost::noncopyable
{ typedef T pixmap_type;
class text_renderer : private boost::noncopyable
{
public:
typedef T pixmap_type;
text_renderer (pixmap_type & pixmap, face_manager<freetype_engine> &font_manager_, stroker & s, composite_mode_e comp_op = src_over);
text_renderer (pixmap_type & pixmap, face_manager<freetype_engine> &font_manager_, composite_mode_e comp_op = src_over);
void render(glyph_positions_ptr pos);
void render_id(int feature_id, pixel_position pos, double min_radius=1.0);
private:
void render_bitmap(FT_Bitmap *bitmap, unsigned rgba, int x, int y, double opacity);
void render_bitmap_id(FT_Bitmap *bitmap,int feature_id,int x,int y);
struct glyph_t : boost::noncopyable
{
FT_Glyph image;
char_properties_ptr properties;
glyph_t(FT_Glyph image_, char_properties_ptr properties_)
: image(image_), properties(properties_) {}
~glyph_t () { FT_Done_Glyph(image);}
};
void prepare_glyphs(glyph_positions_ptr pos);
pixmap_type & pixmap_;
face_manager<freetype_engine> &font_manager_;
stroker & stroker_;
composite_mode_e comp_op_;
boost::ptr_vector<glyph_t> glyphs_;
};
}
#endif // RENDERER_HPP

130
src/text/renderer.cpp
View file

@ -1,20 +1,21 @@
#include <mapnik/text/renderer.hpp>
#include <mapnik/graphics.hpp>
#include <mapnik/grid/grid.hpp>
#include <mapnik/text_properties.hpp>
namespace mapnik
{
template <typename T>
text_renderer<T>::text_renderer (pixmap_type & pixmap, face_manager<freetype_engine> &font_manager_, stroker & s, composite_mode_e comp_op)
text_renderer<T>::text_renderer (pixmap_type & pixmap, face_manager<freetype_engine> &font_manager_, composite_mode_e comp_op)
: pixmap_(pixmap),
font_manager_(font_manager_),
stroker_(s),
stroker_(*(font_manager_.get_stroker())),
comp_op_(comp_op) {}
#if 0
template <typename T>
box2d<double> text_renderer<T>::prepare_glyphs(text_path *path)
void text_renderer<T>::prepare_glyphs(glyph_positions_ptr pos)
{
//clear glyphs
glyphs_.clear();
@ -23,74 +24,61 @@ box2d<double> text_renderer<T>::prepare_glyphs(text_path *path)
FT_Vector pen;
FT_Error error;
FT_BBox bbox;
bbox.xMin = bbox.yMin = 32000; // Initialize these so we can tell if we
bbox.xMax = bbox.yMax = -32000; // properly grew the bbox later
for (int i = 0; i < path->num_nodes(); i++)
pos->rewind();
bool constant_angle = pos->is_constant_angle();
if (constant_angle)
{
char_info_ptr c;
double x, y, angle;
path->vertex(&c, &x, &y, &angle);
// TODO Enable when we have support for setting verbosity
// MAPNIK_LOG_DEBUG(font_engine_freetype) << "text_renderer: prepare_glyphs="
// << c << "," << x << "," << y << "," << angle;
FT_BBox glyph_bbox;
FT_Glyph image;
pen.x = int(x * 64);
pen.y = int(y * 64);
face_set_ptr faces = font_manager_.get_face_set(c->format->face_name, c->format->fontset);
faces->set_character_sizes(c->format->text_size);
glyph_ptr glyph = faces->get_glyph(unsigned(c->c));
FT_Face face = glyph->get_face()->get_face();
matrix.xx = (FT_Fixed)( cos( angle ) * 0x10000L );
matrix.xy = (FT_Fixed)(-sin( angle ) * 0x10000L );
matrix.yx = (FT_Fixed)( sin( angle ) * 0x10000L );
matrix.yy = (FT_Fixed)( cos( angle ) * 0x10000L );
FT_Set_Transform(face, &matrix, &pen);
error = FT_Load_Glyph(face, glyph->get_index(), FT_LOAD_NO_HINTING);
if ( error )
continue;
error = FT_Get_Glyph(face->glyph, &image);
if ( error )
continue;
FT_Glyph_Get_CBox(image,ft_glyph_bbox_pixels, &glyph_bbox);
if (glyph_bbox.xMin < bbox.xMin)
bbox.xMin = glyph_bbox.xMin;
if (glyph_bbox.yMin < bbox.yMin)
bbox.yMin = glyph_bbox.yMin;
if (glyph_bbox.xMax > bbox.xMax)
bbox.xMax = glyph_bbox.xMax;
if (glyph_bbox.yMax > bbox.yMax)
bbox.yMax = glyph_bbox.yMax;
// Check if we properly grew the bbox
if ( bbox.xMin > bbox.xMax )
double angle = pos->get_angle();
double cosa = cos(angle);
double sina = sin(angle);
matrix.xx = (FT_Fixed)( cosa * 0x10000L);
matrix.xy = (FT_Fixed)(-sina * 0x10000L);
matrix.yx = (FT_Fixed)( sina * 0x10000L);
matrix.yy = (FT_Fixed)( cosa * 0x10000L);
}
float text_size = 0;
while (pos->next())
{
char_properties_ptr format = pos->get_format();
if (format)
{
bbox.xMin = 0;
bbox.yMin = 0;
bbox.xMax = 0;
bbox.yMax = 0;
//Only update parameters when format has changed.
text_size = format->text_size;
}
// take ownership of the glyph
glyphs_.push_back(new glyph_t(image, c->format));
}
return box2d<double>(bbox.xMin, bbox.yMin, bbox.xMax, bbox.yMax);
pixel_position p = pos->get_position();
pen.x = int(p.x * 64);
pen.y = int(p.y * 64);
glyph_info const& glyph = pos->get_glyph();
glyph.face->set_character_sizes(text_size); //TODO: Optimize this?
if (!constant_angle)
{
double angle = pos->get_angle();
double cosa = cos(angle);
double sina = sin(angle);
matrix.xx = (FT_Fixed)( cosa * 0x10000L);
matrix.xy = (FT_Fixed)(-sina * 0x10000L);
matrix.yx = (FT_Fixed)( sina * 0x10000L);
matrix.yy = (FT_Fixed)( cosa * 0x10000L);
}
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;
// take ownership of the glyph
glyphs_.push_back(new glyph_t(image, format));
}
}
#endif
template <typename T>
void composite_bitmap(T & pixmap, FT_Bitmap *bitmap, unsigned rgba, int x, int y, double opacity, composite_mode_e comp_op)
@ -242,6 +230,8 @@ void text_renderer<T>::render_bitmap_id(FT_Bitmap *bitmap,int feature_id,int x,i
#endif
}
template <typename T>
void text_renderer<T>::render_bitmap(FT_Bitmap *bitmap, unsigned rgba, int x, int y, double opacity)
{
@ -264,10 +254,10 @@ void text_renderer<T>::render_bitmap(FT_Bitmap *bitmap, unsigned rgba, int x, in
#endif
}
template void text_renderer<image_32>::render(glyph_positions_ptr);
template text_renderer<image_32>::text_renderer(image_32&, face_manager<freetype_engine>&, stroker&, composite_mode_e);
template class text_renderer<image_32>; //::render(glyph_positions_ptr);
//template text_renderer<image_32>::text_renderer(image_32&, face_manager<freetype_engine>&, stroker&, composite_mode_e);
template void text_renderer<grid>::render_id(int, pixel_position, double );
template text_renderer<grid>::text_renderer(grid&, face_manager<freetype_engine>&, stroker&, composite_mode_e);
template class text_renderer<grid>; //::render_id(int, pixel_position, double );
//template text_renderer<grid>::text_renderer(grid&, face_manager<freetype_engine>&, stroker&, composite_mode_e);
}