* 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)

17 files changed, 252 insertions, 27 deletions

diff --git a/configure.ac b/configure.ac
index 00cffd4a7..852970ba8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -610,6 +610,15 @@ AM_CONDITIONAL(USE_IMAGE_MAGICK, test "x$magick_ok" = "xyes")
 AC_SUBST(IMAGEMAGICK_LIBS)
 AC_SUBST(IMAGEMAGICK_CFLAGS)
 
+dnl ***********************************************************************************************************
+dnl Check for a Cairo version that implements user-fonts feature, so that we conditionally add SVGFonts support
+dnl ***********************************************************************************************************
+
+PKG_CHECK_MODULES(CAIRO_USER_FONTS, cairo > 1.6.4, cairouserfonts=yes, cairouserfonts=no)
+if test "x$cairouserfonts" = "xyes"; then
+       AC_DEFINE(ENABLE_SVG_FONTS, 1, [SVG Fonts should be used])
+fi
+
 dnl ******************************
 dnl   Unconditional dependencies
 dnl ******************************
diff --git a/share/examples/svgfont.svg b/share/examples/svgfont.svg
index 4e9a06eab..10bac6e91 100644
--- a/share/examples/svgfont.svg
+++ b/share/examples/svgfont.svg
@@ -1,24 +1,19 @@
 <?xml version="1.0" standalone="yes"?>
 <svg width="400px" height="300px" version="1.1"
   xmlns = 'http://www.w3.org/2000/svg'>
-  <defs>
-    <font id="Font1" horiz-adv-x="1000">
-      <font-face font-family="Super Sans" font-weight="bold"
-           units-per-em="1234" font-style="normal, oblique" cap-height="600" x-height="400"
-           ascent="700" descent="300"
-           alphabetic="0" mathematical="350" ideographic="400" hanging="500">
-         <font-face-src>
-           <font-face-name name="Super Sans Bold"/>
-         </font-face-src>
-       </font-face>
-       <!--<missing-glyph d="M0,0h200v200h-200z"/>--><!--  uncomment this line in orther to test missing-glyph -->
-       <glyph unicode="!" d="M0,0h500v500h-500z"><circle r='500' cx='500' cy='500' style="fill:none;stroke:green;"/></glyph>
-       <glyph unicode="@" d="M500,500h500v500h-500z"><circle r='250' cx='500' cy='500' style="fill:blue;"/></glyph>
-       <!--<hkern u1="!" u2="@" k="1000" />--><!-- uncomment this line in orther to test horizontal kerning-->
 
+    <font id="Font1" horiz-adv-x="1000">
+       <font-face font-family="Super Sans" font-style="oblique" font-stretch="ultra-expanded" />
+       <glyph unicode="!" d="M0,0h500v500h-500z">
+          <circle r='500' cx='500' cy='500' style="fill:none;stroke:green;"/>
+       </glyph>
+       <glyph unicode="@" d="M500,500h500v500h-500z">
+          <circle r='250' cx='500' cy='500' style="fill:blue;"/>
+       </glyph>
+       <missing-glyph d="M0,0h1000v1000h-1000z"></missing-glyph>
+       <hkern u1="!" u2="@" k="1000" />
     </font>
-  </defs>
-  <text x="100" y="100"
-            style="font-family: 'Super Sans';font-weight: bold; font-style: normal;fill:red;">A!@A</text>
+
+  <text x="100" y="100" style="font-size:70;font-family:'Super Sans';fill:red;">This text is not used yet. Currently test strings are hardcoded...</text>
 </svg>
 
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
+
diff --git a/src/sp-font-face.cpp b/src/sp-font-face.cpp
index 78fc51a6b..ad4d586fc 100644
--- a/src/sp-font-face.cpp
+++ b/src/sp-font-face.cpp
@@ -1,3 +1,5 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
 #define __SP_FONTFACE_C__
 
 /*
@@ -531,7 +533,7 @@ static Inkscape::XML::Node *sp_fontface_write(SPObject *object, Inkscape::XML::N
 
     return repr;
 }
-
+#endif //#ifdef ENABLE_SVG_FONTS
 /*
   Local Variables:
   mode:c++
diff --git a/src/sp-font-face.h b/src/sp-font-face.h
index 754125831..d4ac8790a 100644
--- a/src/sp-font-face.h
+++ b/src/sp-font-face.h
@@ -1,3 +1,5 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
 #ifndef __SP_FONTFACE_H__
 #define __SP_FONTFACE_H__
 
@@ -65,3 +67,4 @@ struct SPFontFaceClass {
 GType sp_fontface_get_type (void);
 
 #endif //#ifndef __SP_FONTFACE_H__
+#endif //#ifdef ENABLE_SVG_FONTS
diff --git a/src/sp-font.cpp b/src/sp-font.cpp
index a78f92cc0..5f8d3440a 100644
--- a/src/sp-font.cpp
+++ b/src/sp-font.cpp
@@ -1,3 +1,5 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
 #define __SP_FONT_C__
 
 /*
@@ -19,6 +21,8 @@
 #include "document.h"
 #include "helper-fns.h"
 
+#include "display/nr-svgfonts.h"
+
 static void sp_font_class_init(SPFontClass *fc);
 static void sp_font_init(SPFont *font);
 
@@ -96,6 +100,8 @@ static void sp_font_build(SPObject *object, SPDocument *document, Inkscape::XML:
     sp_object_read_attr(object, "vert-origin-x");
     sp_object_read_attr(object, "vert-origin-y");
     sp_object_read_attr(object, "vert-adv-y");
+
+    nr_svgfonts_append_spfont(SP_FONT(object));
 }
 
 
@@ -270,7 +276,7 @@ static Inkscape::XML::Node *sp_font_write(SPObject *object, Inkscape::XML::Node
 
     return repr;
 }
-
+#endif //#ifdef ENABLE_SVG_FONTS
 /*
   Local Variables:
   mode:c++
diff --git a/src/sp-font.h b/src/sp-font.h
index 3ec866ccc..d8dc37189 100644
--- a/src/sp-font.h
+++ b/src/sp-font.h
@@ -1,3 +1,5 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
 #ifndef __SP_FONT_H__
 #define __SP_FONT_H__
 
@@ -36,3 +38,4 @@ struct SPFontClass {
 GType sp_font_get_type (void);
 
 #endif //#ifndef __SP_FONT_H__
+#endif //#ifdef ENABLE_SVG_FONTS
diff --git a/src/sp-glyph-kerning.cpp b/src/sp-glyph-kerning.cpp
index 6d7006f57..b8a2bb1ed 100644
--- a/src/sp-glyph-kerning.cpp
+++ b/src/sp-glyph-kerning.cpp
@@ -1,3 +1,5 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
 #define __SP_ANCHOR_C__
 
 /*
@@ -229,7 +231,7 @@ static Inkscape::XML::Node *sp_glyph_kerning_write(SPObject *object, Inkscape::X
 
     return repr;
 }
-
+#endif //#ifdef ENABLE_SVG_FONTS
 /*
   Local Variables:
   mode:c++
diff --git a/src/sp-glyph-kerning.h b/src/sp-glyph-kerning.h
index 2933a8abe..806ec0986 100644
--- a/src/sp-glyph-kerning.h
+++ b/src/sp-glyph-kerning.h
@@ -1,3 +1,5 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
 #ifndef __SP_GLYPH_KERNING_H__
 #define __SP_GLYPH_KERNING_H__
 
@@ -45,3 +47,4 @@ GType sp_glyph_kerning_h_get_type (void);
 GType sp_glyph_kerning_v_get_type (void);
 
 #endif //#ifndef __SP_GLYPH_KERNING_H__
+#endif //#ifdef ENABLE_SVG_FONTS
diff --git a/src/sp-glyph.cpp b/src/sp-glyph.cpp
index 0c6d3f1e0..4860b42ed 100644
--- a/src/sp-glyph.cpp
+++ b/src/sp-glyph.cpp
@@ -1,3 +1,5 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
 #define __SP_GLYPH_C__
 
 /*
@@ -295,7 +297,7 @@ static Inkscape::XML::Node *sp_glyph_write(SPObject *object, Inkscape::XML::Node
 
     return repr;
 }
-
+#endif //#ifdef ENABLE_SVG_FONTS
 /*
   Local Variables:
   mode:c++
diff --git a/src/sp-glyph.h b/src/sp-glyph.h
index 40513a259..a1657dd43 100644
--- a/src/sp-glyph.h
+++ b/src/sp-glyph.h
@@ -1,3 +1,5 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
 #ifndef __SP_GLYPH_H__
 #define __SP_GLYPH_H__
 
@@ -53,3 +55,4 @@ struct SPGlyphClass {
 GType sp_glyph_get_type (void);
 
 #endif //#ifndef __SP_GLYPH_H__
+#endif //#ifdef ENABLE_SVG_FONTS
diff --git a/src/sp-missing-glyph.cpp b/src/sp-missing-glyph.cpp
index d4cd16360..7cd75b3b8 100644
--- a/src/sp-missing-glyph.cpp
+++ b/src/sp-missing-glyph.cpp
@@ -1,3 +1,5 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
 #define __SP_MISSING_GLYPH_C__
 
 /*
@@ -178,7 +180,7 @@ static Inkscape::XML::Node *sp_missing_glyph_write(SPObject *object, Inkscape::X
 
     return repr;
 }
-
+#endif //#ifdef ENABLE_SVG_FONTS
 /*
   Local Variables:
   mode:c++
diff --git a/src/sp-missing-glyph.h b/src/sp-missing-glyph.h
index 41b988ab1..4983dce69 100644
--- a/src/sp-missing-glyph.h
+++ b/src/sp-missing-glyph.h
@@ -1,3 +1,5 @@
+#include "config.h"
+#ifdef ENABLE_SVG_FONTS
 #ifndef __SP_MISSING_GLYPH_H__
 #define __SP_MISSING_GLYPH_H__
 
@@ -35,3 +37,4 @@ struct SPMissingGlyphClass {
 GType sp_missing_glyph_get_type (void);
 
 #endif //#ifndef __SP_MISSING_GLYPH_H__
+#endif //#ifdef ENABLE_SVG_FONTS
diff --git a/src/sp-object-repr.cpp b/src/sp-object-repr.cpp
index 6ed2f9ada..7eb91d281 100644
--- a/src/sp-object-repr.cpp
+++ b/src/sp-object-repr.cpp
@@ -43,11 +43,16 @@
 #include "sp-flowdiv.h"
 #include "sp-flowregion.h"
 #include "sp-flowtext.h"
-#include "sp-font.h"
-#include "sp-font-face.h"
-#include "sp-glyph.h"
-#include "sp-missing-glyph.h"
-#include "sp-glyph-kerning.h"
+#include "config.h"
+
+#ifdef ENABLE_SVG_FONTS
+    #include "sp-font.h"
+    #include "sp-font-face.h"
+    #include "sp-glyph.h"
+    #include "sp-missing-glyph.h"
+    #include "sp-glyph-kerning.h"
+#endif
+
 #include "sp-style-elem.h"
 #include "sp-switch.h"
 #include "color-profile-fns.h"
@@ -144,12 +149,14 @@ populate_dtables()
         { "svg:flowRegionExclude", SP_TYPE_FLOWREGIONEXCLUDE },
         { "svg:flowRoot", SP_TYPE_FLOWTEXT },
         { "svg:flowSpan", SP_TYPE_FLOWTSPAN },
+#ifdef ENABLE_SVG_FONTS
         { "svg:font", SP_TYPE_FONT },
         { "svg:font-face", SP_TYPE_FONTFACE },
         { "svg:glyph", SP_TYPE_GLYPH },
         { "svg:missing-glyph", SP_TYPE_MISSING_GLYPH },
         { "svg:hkern", SP_TYPE_HKERN },
         { "svg:vkern", SP_TYPE_VKERN },
+#endif
         { "svg:g", SP_TYPE_GROUP },
         { "svg:feBlend", SP_TYPE_FEBLEND },
         { "svg:feColorMatrix", SP_TYPE_FECOLORMATRIX },