more bugfixes in font transform code

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

diff --git a/lib/filters/remove_font_transforms.c b/lib/filters/remove_font_transforms.c
index a2d7c44..748ba22 100644 (file)
--- a/lib/filters/remove_font_transforms.c
+++ b/lib/filters/remove_font_transforms.c
@@ -105,16 +105,16 @@ void matrix_convert(gfxmatrix_t*in, const char*id, mymatrix_t*out, gfxmatrix_t*s
        return;
     }
     out->m00 = in->m00 / l;
-    out->m01 = in->m01 / l;
     out->m10 = in->m10 / l;
-    out->m11 = in->m11 / l;
+    out->m01 = -in->m01 / l;
+    out->m11 = -in->m11 / l;
     out->id = (char*)id;
 
     if(scalematrix) {
        scalematrix->m00 = l;
        scalematrix->m01 = 0;
        scalematrix->m10 = 0;
-       scalematrix->m11 = l;
+       scalematrix->m11 = -l;
        scalematrix->tx = in->tx;
        scalematrix->ty = in->ty;
     }
@@ -129,6 +129,7 @@ typedef struct _transformedfont {
     gfxfont_t*font;
     mymatrix_t matrix;
     int*used;
+    double dx;
 } transformedfont_t;
 
 static transformedfont_t* transformedfont_new(gfxfont_t*orig, mymatrix_t*m)
@@ -163,10 +164,10 @@ static void glyph_transform(gfxglyph_t*g, mymatrix_t*mm)
     m.m11 = mm->m11;
     m.tx = 0;
     m.ty = 0;
+    g->line = gfxline_clone(g->line);
     gfxline_transform(g->line, &m);
-    g->advance *= m.m00;
-    if(g->advance<0) 
-       g->advance = 0;
+    if(m.m00>0)
+       g->advance *= m.m00;
 }
 
 static gfxresult_t* pass1_finish(gfxfilter_t*f, gfxdevice_t*out)
@@ -195,11 +196,43 @@ static gfxresult_t* pass1_finish(gfxfilter_t*f, gfxdevice_t*out)
                count++;
            }
        }
+
+       /* adjust the origin so that every character is to the
+          right of the origin */
+       gfxbbox_t total = {0,0,0,0};
+       double average_xmax = 0;
+       for(t=0;t<count;t++) {
+           gfxline_t*line = font->glyphs[t].line;
+           gfxbbox_t b = gfxline_getbbox(line);
+           total = gfxbbox_expand_to_bbox(total, b);
+       }
+       if(count) 
+           average_xmax /= count;
+
+       fd->dx = -total.xmin;
+
+       font->ascent = total.ymax;
+       font->descent = total.ymin;
+
+       for(t=0;t<count;t++) {
+           gfxline_t*line = font->glyphs[t].line;
+           while(line) {
+               line->x += fd->dx;
+               line->sx += fd->dx;
+               line = line->next;
+           }
+       }
        gfxfont_fix_unicode(font);
     }
     return out->finish(out);
 }
 
+static void pass2_addfont(gfxfilter_t*f, gfxfont_t*font, gfxdevice_t*out)
+{
+    /* we throw away original fonts, and do the addfont() for the transformed
+       fonts in the first drawchar() */
+}
+
 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;
@@ -215,6 +248,7 @@ static void pass2_drawchar(gfxfilter_t*f, gfxfont_t*font, int glyphnr, gfxcolor_
     gfxmatrix_t scalematrix;
     matrix_convert(matrix, font->id, &m, &scalematrix);
     transformedfont_t*d = dict_lookup(i->matrices, &m);
+    scalematrix.tx -= d->dx*scalematrix.m00;
     out->drawchar(out, d->font, d->used[glyphnr], color, &scalematrix);
 }
 
@@ -231,6 +265,7 @@ void gfxtwopassfilter_remove_font_transforms_init(gfxtwopassfilter_t*f)
     f->pass1.internal = i;
 
     f->pass2.name = "remove font transforms pass 2";
+    f->pass2.addfont = pass2_addfont;
     f->pass2.drawchar = pass2_drawchar;
     f->pass2.internal = i;