added gfxfilter for merging fonts

[swftools.git] / lib / filters / one_big_font.c

diff --git a/lib/filters/one_big_font.c b/lib/filters/one_big_font.c
new file mode 100644 (file)
index 0000000..667c999
--- /dev/null
+++ b/lib/filters/one_big_font.c
@@ -0,0 +1,117 @@
+/* remove_font_transform.c
+
+   Part of the swftools package.
+
+   Copyright (c) 2010 Matthias Kramm <kramm@quiss.org> 
+ 
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#include <stdlib.h>
+#include <memory.h>
+#include "../gfxfilter.h"
+#include "../gfxtools.h"
+#include "../gfxfont.h"
+#include "../types.h"
+#include "../mem.h"
+
+typedef struct _internal {
+    gfxfontlist_t*fonts;
+    gfxfont_t*font;
+    int num_glyphs;
+} internal_t;
+
+typedef struct _fontdata {
+    gfxfont_t*font;
+    int start;
+} fontdata_t;
+
+static void pass1_drawchar(gfxfilter_t*f, gfxfont_t*font, int glyphnr, gfxcolor_t*color, gfxmatrix_t*matrix, gfxdevice_t*out)
+{
+    internal_t*i = (internal_t*)f->internal;
+    fontdata_t*d = gfxfontlist_getuserdata(i->fonts, font->id);
+    if(!d) {
+       d = rfx_calloc(sizeof(fontdata_t));
+       d->font = font;
+       d->start = i->num_glyphs;
+       i->num_glyphs  += font->num_glyphs;
+       i->fonts = gfxfontlist_addfont2(i->fonts, font, d);
+    }
+    out->drawchar(out, font, glyphnr, color, matrix);
+}
+static gfxresult_t*pass1_finish(gfxfilter_t*f, gfxdevice_t*out)
+{
+    internal_t*i = (internal_t*)f->internal;
+    gfxfont_t*font = i->font = rfx_calloc(sizeof(gfxfont_t));
+    font->id = strdup("onebigfont");
+    font->num_glyphs = i->num_glyphs;
+    font->glyphs = rfx_calloc(sizeof(gfxglyph_t)*i->num_glyphs);
+    gfxfontlist_t*l = i->fonts;
+    while(l) {
+       gfxfont_t*old = l->font;
+       fontdata_t*d = l->user;
+       memcpy(font->glyphs + d->start, old->glyphs, sizeof(gfxglyph_t)*old->num_glyphs);
+       if(old->ascent > font->ascent)
+           font->ascent = old->ascent;
+       if(old->descent > font->descent)
+           font->descent = old->descent;
+       l = l->next;
+    }
+    gfxfont_fix_unicode(font);
+    return out->finish(out);
+}
+
+static void pass2_addfont(gfxfilter_t*f, gfxfont_t*font, gfxdevice_t*out)
+{
+    internal_t*i = (internal_t*)f->internal;
+    out->addfont(out, i->font);
+}
+static void pass2_drawchar(gfxfilter_t*f, gfxfont_t*font, int glyphnr, gfxcolor_t*color, gfxmatrix_t*matrix, gfxdevice_t*out)
+{
+    internal_t*i = (internal_t*)f->internal;
+    fontdata_t*d = gfxfontlist_getuserdata(i->fonts, font->id);
+    out->drawchar(out, i->font, glyphnr + d->start, color, matrix);
+}
+static gfxresult_t*pass2_finish(gfxfilter_t*f, gfxdevice_t*out)
+{
+    internal_t*i = (internal_t*)f->internal;
+    // clean up
+    gfxfontlist_t*l = i->fonts;
+    while(l) {
+       free(l->user);l->user=0;
+       l=l->next;
+    }
+    gfxfontlist_free(i->fonts, 0);i->fonts=0;
+    return out->finish(out);
+}
+
+void gfxtwopassfilter_one_big_font_init(gfxtwopassfilter_t*f)
+{
+    internal_t*i = (internal_t*)rfx_calloc(sizeof(internal_t));
+    
+    memset(f, 0, sizeof(gfxtwopassfilter_t));
+    f->type = gfxfilter_twopass;
+
+    f->pass1.name = "filter \"one big font\" pass 1";
+    f->pass1.drawchar = pass1_drawchar;
+    f->pass1.finish = pass1_finish;
+    f->pass1.internal = i;
+
+    f->pass2.name = "filter \"one big font\" pass 2";
+    f->pass2.addfont = pass2_addfont;
+    f->pass2.drawchar = pass2_drawchar;
+    f->pass2.finish = pass2_finish;
+    f->pass2.internal = i;
+}
+