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#include "config.h"
#ifdef ENABLE_SVG_FONTS
/*
* SVGFonts rendering implementation
*
* Authors:
* Felipe C. da S. Sanches <felipe.sanches@gmail.com>
*
* Copyright (C) 2008 Felipe C. da S. Sanches
*
* Released under GNU GPL version 2 or later.
* Read the file 'COPYING' for more information.
*/
#include <libnr/n-art-bpath.h>
#include "../style.h"
#include "../sp-glyph.h"
#include "../sp-missing-glyph.h"
#include "../sp-font.h"
#include <cairo.h>
#include <vector>
#include "svg/svg.h"
#include "inkscape-cairo.h"
#include <gtk/gtk.h>
static std::vector<SPGlyph*> glyphs;
static SPMissingGlyph* missingglyph = NULL;
static std::vector<SPFont*> svgfonts;
cairo_font_face_t* nr_svgfonts_get_user_font_face();
void nr_svgfonts_append_spfont(SPFont* font);
static cairo_status_t scaled_font_init (cairo_scaled_font_t *scaled_font, cairo_font_extents_t *metrics);
static cairo_status_t scaled_font_unicode_to_glyph (cairo_scaled_font_t *scaled_font, unsigned long unicode, unsigned long *glyph);
static cairo_status_t scaled_font_render_glyph (cairo_scaled_font_t *scaled_font, unsigned long glyph, cairo_t *cr, cairo_text_extents_t *metrics);
void nr_svgfonts_append_spfont(SPFont* font){
svgfonts.push_back(font);
nr_svgfonts_get_user_font_face();
}
static cairo_status_t
scaled_font_init (cairo_scaled_font_t *scaled_font,
cairo_font_extents_t *metrics)
{
//TODO
// metrics->ascent = .75;
// metrics->descent = .25;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
scaled_font_unicode_to_glyph (cairo_scaled_font_t *scaled_font,
unsigned long unicode,
unsigned long *glyph)
{
//g_warning("scaled_font_unicode_to_glyph CALL. unicode=%c", (char)unicode);
unsigned long i;
for (i=0; i < (unsigned long) glyphs.size(); i++){
//TODO: compare unicode strings for ligadure glyphs (i.e. scaled_font_text_to_glyph)
if ( ((unsigned long) glyphs[i]->unicode[0]) == unicode){
*glyph = i;
return CAIRO_STATUS_SUCCESS;
}
}
*glyph = i;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
scaled_font_render_glyph (cairo_scaled_font_t *scaled_font,
unsigned long glyph,
cairo_t *cr,
cairo_text_extents_t *metrics)
{
//g_warning("scaled_font_render_glyph CALL. glyph=%d", (int)glyph);
if (glyph > glyphs.size()) return CAIRO_STATUS_SUCCESS;
SPObject* node;
if (glyph == glyphs.size()){
if (!missingglyph) return CAIRO_STATUS_SUCCESS;
node = (SPObject*) missingglyph;
g_warning("RENDER MISSING-GLYPH");
} else {
node = (SPObject*) glyphs[glyph];
g_warning("RENDER %c", glyphs[glyph]->unicode[0]);
}
NArtBpath *bpath = NULL;
if (SP_IS_GLYPH(node)) bpath = sp_svg_read_path(((SPGlyph*)node)->d);
if (SP_IS_MISSING_GLYPH(node)) bpath = sp_svg_read_path(((SPMissingGlyph*)node)->d);
cairo_new_path(cr);
NR::scale s(1.0/((SPFont*) node->parent)->horiz_adv_x);
NR::Matrix t(s);
NRRect area(0,0,1,1); //I need help here!
feed_curve_to_cairo (cr, bpath, t, area.upgrade(), false, 0);
cairo_fill(cr);
return CAIRO_STATUS_SUCCESS;
}
bool drawing_expose_cb (GtkWidget *widget, GdkEventExpose *event, gpointer data)
{
cairo_t *cr = gdk_cairo_create (widget->window);
cairo_set_font_face (cr, nr_svgfonts_get_user_font_face());
cairo_set_font_size (cr, 200);
cairo_move_to (cr, 200, 200);
cairo_show_text (cr, "A@!A");
cairo_move_to (cr, 200, 400);
cairo_show_text (cr, "A!@A");
cairo_destroy (cr);
return TRUE;
}
cairo_font_face_t * nr_svgfonts_get_user_font_face(){
static cairo_font_face_t *user_font_face = NULL;
if (!user_font_face) {
for(SPObject* node = svgfonts[0]->children;node;node=node->next){
if (SP_IS_GLYPH(node)){
g_warning("glyphs.push_back((SPGlyph*)node); (node->unicode[0]='%c')", ((SPGlyph*)node)->unicode[0]);
glyphs.push_back((SPGlyph*)node);
}
if (SP_IS_MISSING_GLYPH(node)){
g_warning("missingglyph=(SPMissingGlyph*)node;");
missingglyph=(SPMissingGlyph*)node;
}
}
user_font_face = cairo_user_font_face_create ();
cairo_user_font_face_set_init_func (user_font_face, scaled_font_init);
cairo_user_font_face_set_render_glyph_func (user_font_face, scaled_font_render_glyph);
cairo_user_font_face_set_unicode_to_glyph_func (user_font_face, scaled_font_unicode_to_glyph);
GtkWidget *window;
GtkWidget *drawing;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW(window), 1200, 850);
drawing = gtk_drawing_area_new ();
gtk_container_add (GTK_CONTAINER (window), drawing);
gtk_widget_show_all (window);
g_signal_connect (drawing, "expose-event", G_CALLBACK (drawing_expose_cb), NULL);
}
return user_font_face;
}
#endif //#ifdef ENABLE_SVG_FONTS
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