fixed memory initialization bug in remove_font_transforms filter
[swftools.git] / lib / pdf / InfoOutputDev.cc
index fd9bf99..a977970 100644 (file)
@@ -15,6 +15,9 @@
 #endif
 #include "GfxState.h"
 #include "../log.h"
+#include "../types.h"
+#include "../q.h"
+#include "../gfxfont.h"
 #include <math.h>
 #include <assert.h>
 
@@ -51,36 +54,37 @@ InfoOutputDev::~InfoOutputDev()
     delete id2font;id2font=0;
     delete splash;splash=0;
 }
+
 void FontInfo::grow(int size)
 {
     if(size >= this->num_glyphs) {
        this->glyphs = (GlyphInfo**)realloc(this->glyphs, sizeof(GlyphInfo*)*(size));
+       this->kerning = (dict_t**)realloc(this->kerning, sizeof(dict_t*)*(size));
        memset(&this->glyphs[this->num_glyphs], 0, sizeof(SplashPath*)*((size)-this->num_glyphs));
+       memset(&this->kerning[this->num_glyphs], 0, sizeof(dict_t*)*((size)-this->num_glyphs));
        this->num_glyphs = size;
     }
 }
 FontInfo::FontInfo(char*id)
 {
     this->id = strdup(id);
-    this->charid2glyph = 0;
     this->seen = 0;
     this->num_glyphs = 0;
     this->glyphs = 0;
+    this->kerning = 0;
     this->splash_font = 0;
     this->lastchar = -1;
     this->lastx = 0;
     this->lasty = 0;
     this->gfxfont = 0;
     this->space_char = -1;
+    this->ascender = 0;
+    this->descender = 0;
 }
 FontInfo::~FontInfo()
 {
     if(this->id) {free(this->id);this->id=0;}
     this->font = 0;
-    if(this->charid2glyph) {
-       free(this->charid2glyph);
-       this->charid2glyph = 0;
-    }
     int t;
     for(t=0;t<num_glyphs;t++) {
        if(glyphs[t]) {
@@ -92,6 +96,19 @@ FontInfo::~FontInfo()
     free(glyphs);glyphs=0;
     if(this->gfxfont)
         gfxfont_free(this->gfxfont);
+   
+    if(kerning) {
+       for(t=0;t<num_glyphs;t++) {
+           dict_t* d = kerning[t];
+           if(!d) continue;
+           DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
+               mtf_destroy(m);
+           }
+           dict_destroy(d);
+       }
+       free(kerning);
+       kerning=0;
+    }
 }
 
 static int findSpace(gfxfont_t*font)
@@ -102,25 +119,25 @@ static int findSpace(gfxfont_t*font)
        gfxglyph_t*g = &font->glyphs[t];
        if(GLYPH_IS_SPACE(g)) {
            if(g->unicode == 32) return t;
-           if(first_space<0)
-               first_space = t;
        }
     }
-    if(font->num_glyphs>32 && GLYPH_IS_SPACE(&font->glyphs[32])) {
-       return 32;
-    }
-    return first_space;
+    return -1;
 }
 
 static int addSpace(gfxfont_t*font)
 {
+    /* first, make sure the new space char is the only char that'll use unicode 32 */
+    int t;
+    for(t=0;t<font->num_glyphs;t++) {
+       if(font->glyphs[t].unicode==32)
+           font->glyphs[t].unicode=0;
+    }
     font->num_glyphs++;
     font->glyphs = (gfxglyph_t*)realloc(font->glyphs, sizeof(gfxglyph_t)*font->num_glyphs);
     gfxglyph_t*g = &font->glyphs[font->num_glyphs-1];
     memset(g, 0, sizeof(*g));
     g->unicode = 32;
-    //g->advance = font->ascent;
-    g->advance = fabs(font->ascent - font->descent)*2 / 3;
+    g->advance = fabs(font->ascent + font->descent)*2 / 3;
     if(font->max_unicode > 32)
        font->unicode2glyph[32] = font->num_glyphs-1;
 #if 0
@@ -131,8 +148,7 @@ static int addSpace(gfxfont_t*font)
 
 static gfxfont_t* createGfxFont(FontInfo*src)
 {
-    gfxfont_t*font = (gfxfont_t*)malloc(sizeof(gfxfont_t));
-    memset(font, 0, sizeof(gfxfont_t));
+    gfxfont_t*font = (gfxfont_t*)rfx_calloc(sizeof(gfxfont_t));
 
     font->glyphs = (gfxglyph_t*)malloc(sizeof(gfxglyph_t)*src->num_glyphs);
     memset(font->glyphs, 0, sizeof(gfxglyph_t)*src->num_glyphs);
@@ -143,8 +159,8 @@ static gfxfont_t* createGfxFont(FontInfo*src)
     double scale = 1;
     //printf("%d glyphs\n", font->num_glyphs);
     font->num_glyphs = 0;
-    font->ascent = fabs(src->descender);
-    font->descent = fabs(src->ascender);
+    font->ascent = fabs(src->ascender);
+    font->descent = fabs(src->descender);
     
     for(t=0;t<src->num_glyphs;t++) {
        if(src->glyphs[t]) {
@@ -154,8 +170,6 @@ static gfxfont_t* createGfxFont(FontInfo*src)
            gfxglyph_t*glyph = &font->glyphs[font->num_glyphs];
            src->glyphs[t]->glyphid = font->num_glyphs;
            glyph->unicode = src->glyphs[t]->unicode;
-           if(glyph->unicode >= font->max_unicode)
-               font->max_unicode = glyph->unicode+1;
            gfxdrawer_t drawer;
            gfxdrawer_target_gfxline(&drawer);
            int s;
@@ -192,7 +206,6 @@ static gfxfont_t* createGfxFont(FontInfo*src)
            if(src->glyphs[t]->advance>0) {
                glyph->advance = src->glyphs[t]->advance;
            } else {
-               msg("<warning> Approximating advance value for glyph %d", t);
                glyph->advance = xmax*scale;
            }
            if(config_bigchar) {
@@ -205,17 +218,51 @@ static gfxfont_t* createGfxFont(FontInfo*src)
            font->num_glyphs++;
        }
     }
-    font->unicode2glyph = (int*)malloc(sizeof(int)*font->max_unicode);
-    memset(font->unicode2glyph, -1, sizeof(int)*font->max_unicode);
-    for(t=0;t<font->num_glyphs;t++) {
-       if(font->glyphs[t].unicode>0 && font->glyphs[t].unicode<font->max_unicode) {
-           font->unicode2glyph[font->glyphs[t].unicode] = t;
-       }
 
+    int kerning_size = 0;
+    for(t=0;t<src->num_glyphs;t++) {
+       dict_t* d = src->kerning[t];
+       if(!d) continue;
+       DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
+           if(m) {
+               kerning_size++;
+           }
+       }
     }
+    font->kerning_size = kerning_size;
+    font->kerning = (gfxkerning_t*)malloc(sizeof(gfxkerning_t)*kerning_size);
+    int pos = 0;
+    for(t=0;t<src->num_glyphs;t++) {
+       dict_t* d = src->kerning[t];
+       if(!d) continue;
+       DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
+           if(m) {
+               font->kerning[pos].c1 = src->glyphs[t]->glyphid;
+               font->kerning[pos].c2 = src->glyphs[(int)(ptroff_t)key]->glyphid;
+               font->kerning[pos].advance = (int)(ptroff_t)m->first->key;
+               pos++;
+           }
+       }
+    }
+    //int advance = (int)(ptroff_t)m->first->key;
+
     return font;
 }
 
+static float find_average_glyph_advance(gfxfont_t*f)
+{
+    if(!f->num_glyphs)
+       return 0.0;
+
+    float*values = (float*)malloc(sizeof(float)*f->num_glyphs);
+    int t;
+    for(t=0;t<f->num_glyphs;t++) {
+       values[t] = f->glyphs[t].advance;
+    }
+    float m = medianf(values, f->num_glyphs);
+    free(values);
+    return m;
+}
 
 gfxfont_t* FontInfo::getGfxFont()
 {
@@ -223,14 +270,17 @@ gfxfont_t* FontInfo::getGfxFont()
         this->gfxfont = createGfxFont(this);
         this->gfxfont->id = strdup(this->id);
        this->space_char = findSpace(this->gfxfont);
+       this->average_advance = find_average_glyph_advance(this->gfxfont);
+
        if(this->space_char>=0) {
            msg("<debug> Font %s has space char %d (unicode=%d)", 
                    this->id, this->space_char, 
                    this->gfxfont->glyphs[this->space_char].unicode);
        } else if(config_addspace) {
            this->space_char = addSpace(this->gfxfont);
-           msg("<debug> Appending space char to font %s, position %d", this->gfxfont->id, this->space_char);
+           msg("<debug> Appending space char to font %s, position %d, width %f", this->gfxfont->id, this->space_char, this->gfxfont->glyphs[this->space_char].advance);
        }
+       gfxfont_fix_unicode(this->gfxfont);
     }
     return this->gfxfont;
 }
@@ -390,15 +440,31 @@ void InfoOutputDev::drawChar(GfxState *state, double x, double y,
        g->unicode = u[0];
     }
     if(currentfont->lastchar>=0 && currentfont->lasty == y) {
-       double xshift = x - currentfont->lastx;
+       double xshift = (x - currentfont->lastx);
        if(xshift>=0 && xshift > g->advance_max) {
            g->advance_max = xshift;
        }
+       int advance = (int)xshift;
+       if(advance>=0 && advance<g->advance*4 && advance!=currentfont->lastadvance) {
+           int c1 = currentfont->lastchar;
+           int c2 = code;
+           dict_t*d = currentfont->kerning[c1];
+           if(!d) {
+               d = currentfont->kerning[c1] = dict_new2(&int_type);
+           }
+           mtf_t*k = (mtf_t*)dict_lookup(d, (void*)(ptroff_t)c2);
+           if(!k) {
+               k = mtf_new(&int_type);
+               dict_put(d, (void*)(ptroff_t)c2, k);
+           }
+           mtf_increase(k, (void*)(ptroff_t)advance);
+       }
     }
 
     currentfont->lastx = x;
     currentfont->lasty = y;
     currentfont->lastchar = code;
+    currentfont->lastadvance = (int)(g->advance+0.5);
 }
 
 GBool InfoOutputDev::beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, Unicode *u, int uLen)
@@ -430,6 +496,7 @@ GBool InfoOutputDev::beginType3Char(GfxState *state, double x, double y, double
        currentglyph->y1=0;
        currentglyph->x2=dx;
        currentglyph->y2=dy;
+       currentglyph->advance=dx;
        return gFalse;
     } else {
        return gTrue;
@@ -446,6 +513,11 @@ void InfoOutputDev::type3D0(GfxState *state, double wx, double wy)
 
 void InfoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury)
 {
+    if(-lly>currentfont->descender)
+       currentfont->descender = -lly;
+    if(ury>currentfont->ascender)
+       currentfont->ascender = ury;
+
     currentglyph->x1=llx;
     currentglyph->y1=lly;
     currentglyph->x2=urx;