* add rule in configure.ac so that only who has cairo > 1.6.4 (currently cairo git master branch) will compile SVGFonts (experimental) support.

* First code for SVGFonts rendering. Renders in a separate window because we still dont have pango integration.

(bzr r5753)

4 files changed, 185 insertions, 0 deletions

diff --git a/src/display/Makefile_insert b/src/display/Makefile_insert
index 2e27cc188..5c7fd892e 100644
--- a/src/display/Makefile_insert
+++ b/src/display/Makefile_insert
@@ -55,6 +55,8 @@ display_libspdisplay_a_SOURCES = \
 	display/nr-plain-stuff-gdk.h	\
 	display/nr-plain-stuff.cpp	\
 	display/nr-plain-stuff.h	\
+	display/nr-svgfonts.cpp		\
+	display/nr-svgfonts.h		\
 	display/rendermode.h		\
 	display/snap-indicator.cpp	\
 	display/snap-indicator.h	\
diff --git a/src/display/nr-arena-glyphs.cpp b/src/display/nr-arena-glyphs.cpp
index 6ee1be796..63af4787a 100644
--- a/src/display/nr-arena-glyphs.cpp
+++ b/src/display/nr-arena-glyphs.cpp
@@ -37,6 +37,8 @@
 void nr_pixblock_render_shape_mask_or(NRPixBlock &m, Shape *theS);
 #endif
 
+#include "nr-svgfonts.h"
+
 static void nr_arena_glyphs_class_init(NRArenaGlyphsClass *klass);
 static void nr_arena_glyphs_init(NRArenaGlyphs *glyphs);
 static void nr_arena_glyphs_finalize(NRObject *object);
diff --git a/src/display/nr-svgfonts.cpp b/src/display/nr-svgfonts.cpp
new file mode 100644
index 000000000..472d232cf
--- /dev/null
+++ b/src/display/nr-svgfonts.cpp
@@ -0,0 +1,156 @@
+#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
+
diff --git a/src/display/nr-svgfonts.h b/src/display/nr-svgfonts.h
new file mode 100644
index 000000000..f1671cb7d
--- /dev/null
+++ b/src/display/nr-svgfonts.h
@@ -0,0 +1,25 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
+#ifndef __SVGFONTS_H__
+#define __SVGFONTS_H__
+/*
+ * SVGFonts rendering headear
+ *
+ * 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 "../sp-font.h"
+#include "cairo.h"
+
+void nr_svgfonts_append_spfont(SPFont* font);
+cairo_font_face_t* nr_svgfonts_get_user_font_face();
+
+#endif //#ifndef __SVGFONTS_H__
+#endif //#ifdef ENABLE_SVG_FONTS
+