added custom font scaling.
[swftools.git] / lib / modules / swffont.c
index d6f157b..ab77363 100644 (file)
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
-#ifdef USE_FREETYPE
+static int loadfont_scale = 1;
+
+int swf_SetLoadFontScale(int scale)
+{
+    loadfont_scale = scale;
+}
+
+#ifdef HAVE_FREETYPE
 
 #include <freetype/freetype.h>
 #include <freetype/ftglyph.h>
 #include <freetype/ttnameid.h>
 #include <freetype/ftoutln.h>
 
+#define FT_SCALE loadfont_scale
+#define FT_SUBPIXELS 64
+
 static int ft_move_to(FT_Vector* _to, void* user) 
 {
     drawer_t* draw = (drawer_t*)user;
     FPOINT to;
-    to.x = _to->x/256.0;
-    to.y = _to->y/256.0;
+    to.x = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
+    to.y = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
     draw->moveTo(draw, &to);
     return 0;
 }
@@ -42,8 +52,8 @@ static int ft_line_to(FT_Vector* _to, void* user)
 {
     drawer_t* draw = (drawer_t*)user;
     FPOINT to;
-    to.x = _to->x/256.0;
-    to.y = _to->y/256.0;
+    to.x = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
+    to.y = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
     draw->lineTo(draw, &to);
     return 0;
 }
@@ -51,12 +61,12 @@ static int ft_cubic_to(FT_Vector* _c1, FT_Vector* _c2, FT_Vector* _to, void* use
 {
     drawer_t* draw = (drawer_t*)user;
     FPOINT c1,c2,to;
-    to.x = _to->x/256.0;
-    to.y = _to->y/256.0;
-    c1.x = _c1->x/256.0;
-    c1.y = _c1->y/256.0;
-    c2.x = _c2->x/256.0;
-    c2.y = _c2->y/256.0;
+    to.x = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
+    to.y = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
+    c1.x = _c1->x*FT_SCALE/(float)FT_SUBPIXELS;
+    c1.y = -_c1->y*FT_SCALE/(float)FT_SUBPIXELS;
+    c2.x = _c2->x*FT_SCALE/(float)FT_SUBPIXELS;
+    c2.y = -_c2->y*FT_SCALE/(float)FT_SUBPIXELS;
     draw_cubicTo(draw, &c1, &c2, &to);
     return 0;
 }
@@ -64,10 +74,10 @@ static int ft_conic_to(FT_Vector* _c, FT_Vector* _to, void* user)
 {
     drawer_t* draw = (drawer_t*)user;
     FPOINT c,to;
-    to.x = _to->x/256.0;
-    to.y = _to->y/256.0;
-    c.x = _c->x/256.0;
-    c.y = _c->y/256.0;
+    to.x = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
+    to.y = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
+    c.x = _c->x*FT_SCALE/(float)FT_SUBPIXELS;
+    c.y = -_c->y*FT_SCALE/(float)FT_SUBPIXELS;
     draw_conicTo(draw, &c, &to);
     return 0;
 }
@@ -86,11 +96,13 @@ SWFFONT* swf_LoadTrueTypeFont(char*filename)
 {
     FT_Face face;
     FT_Error error;
-    const char* name;
+    const char* name = 0;
     FT_ULong charcode;
     FT_UInt gindex;
     SWFFONT* font;
     int t;
+    int skipunused = 1;
+    int*glyph2glyph;
    
     if(ftlibrary == 0) {
        if(FT_Init_FreeType(&ftlibrary)) {
@@ -113,26 +125,27 @@ SWFFONT* swf_LoadTrueTypeFont(char*filename)
     font->layout = malloc(sizeof(SWFLAYOUT));
     memset(font->layout, 0, sizeof(SWFLAYOUT));
     font->layout->bounds = malloc(face->num_glyphs*sizeof(SRECT));
-    font->numchars = face->num_glyphs;
     font->style =  ((face->style_flags&FT_STYLE_FLAG_ITALIC)?FONT_STYLE_ITALIC:0)
                  |((face->style_flags&FT_STYLE_FLAG_BOLD)?FONT_STYLE_BOLD:0);
     font->encoding = FONT_ENCODING_UNICODE;
     font->glyph2ascii = malloc(face->num_glyphs*sizeof(U16));
+    memset(font->glyph2ascii, 0, face->num_glyphs*sizeof(U16));
     font->maxascii = 0;
-    memset(font->ascii2glyph, 0, font->maxascii*sizeof(int));
     font->glyph = malloc(face->num_glyphs*sizeof(SWFGLYPH));
-    memset(font->glyph, 0, face->num_glyphs*sizeof(U16));
+    memset(font->glyph, 0, face->num_glyphs*sizeof(SWFGLYPH));
     if(FT_HAS_GLYPH_NAMES(face)) {
        font->glyphnames = malloc(face->num_glyphs*sizeof(char*));
+       memset(font->glyphnames,0,face->num_glyphs*sizeof(char*));
     }
 
-    font->layout->ascent = face->ascender; //face->bbox.xMin;
-    font->layout->descent = face->descender; //face->bbox.xMax;
-    font->layout->leading = -face->bbox.xMin;
+    font->layout->ascent = face->ascender*20/FT_SUBPIXELS; //face->bbox.xMin;
+    font->layout->descent = abs(face->descender)*20/FT_SUBPIXELS; //face->bbox.xMax;
+    font->layout->leading = abs(face->bbox.yMin - face->bbox.yMax); //-face->bbox.xMin*20/FT_SUBPIXELS;
     font->layout->kerningcount = 0;
     
+    name = FT_Get_Postscript_Name(face);
     if(name && *name)
-       font->name = (U8*)strdup(FT_Get_Postscript_Name(face));
+       font->name = (U8*)strdup(name);
 
 /*    // Map Glyphs to Unicode, version 1 (quick and dirty):
     int t;
@@ -162,22 +175,42 @@ SWFFONT* swf_LoadTrueTypeFont(char*filename)
        charcode = FT_Get_Next_Char(face, charcode, &gindex);
     }
     
-    memset(font->glyph2ascii, 0, face->num_glyphs*sizeof(U16));
     font->ascii2glyph = malloc(font->maxascii*sizeof(int));
     
-    for(t=0;t<font->maxascii;t++)
-       font->ascii2glyph[t] = FT_Get_Char_Index(face, t);
+    for(t=0;t<font->maxascii;t++) {
+       int g = FT_Get_Char_Index(face, t);
+       if(!g || g>=face->num_glyphs)
+           g = -1;
+       font->ascii2glyph[t] = g;
+       if(g>=0) {
+           if(!font->glyph2ascii[g]) {
+               font->glyph2ascii[g] = t;
+           }
+       }
+    }
+
+    font->numchars = 0;
+
+    glyph2glyph = (int*)malloc(face->num_glyphs*sizeof(int));
 
     for(t=0; t < face->num_glyphs; t++) {
        FT_Glyph glyph;
        FT_BBox bbox;
+       FT_Matrix matrix;
        char name[128];
        drawer_t draw;
+       int ret;
+       char hasname = 0;
        name[0]=0;
        if(FT_HAS_GLYPH_NAMES(face)) {
            error = FT_Get_Glyph_Name(face, t, name, 127);
-           if(!error) 
-               font->glyphnames[t] = strdup(name);
+           if(!error && name[0] && !strstr(name, "notdef")) {
+               font->glyphnames[font->numchars] = strdup(name);
+               hasname = 1;
+           }
+       }
+       if(!font->glyph2ascii[t] && !hasname && skipunused) {
+           continue;
        }
        error = FT_Load_Glyph(face, t, FT_LOAD_NO_BITMAP|FT_LOAD_NO_SCALE);
        if(error) return 0;
@@ -185,33 +218,70 @@ SWFFONT* swf_LoadTrueTypeFont(char*filename)
        if(error) return 0;
 
        FT_Glyph_Get_CBox(glyph, ft_glyph_bbox_unscaled, &bbox);
+       bbox.yMin = -bbox.yMin;
+       bbox.yMax = -bbox.yMax;
+       if(bbox.xMax < bbox.xMin) {
+           // swap
+           bbox.xMax ^= bbox.xMin;
+           bbox.xMin ^= bbox.xMax;
+           bbox.xMax ^= bbox.xMin;
+       }
+       if(bbox.yMax < bbox.yMin) {
+           // swap
+           bbox.yMax ^= bbox.yMin;
+           bbox.yMin ^= bbox.yMax;
+           bbox.yMax ^= bbox.yMin;
+       }
 
        swf_Shape01DrawerInit(&draw, 0);
 
+       //error = FT_Outline_Decompose(&face->glyph->outline, &outline_functions, &draw);
        error = FT_Outline_Decompose(&face->glyph->outline, &outline_functions, &draw);
        if(error) return 0;
 
        draw.finish(&draw);
 
-       font->glyph[t].advance = glyph->advance.x*20/256;
-       font->glyph[t].shape = swf_ShapeDrawerToShape(&draw);
-       //swf_ShapeDrawerGetBBox(&draw);
+#if 0
+       if(bbox.xMin > 0) {
+           font->glyph[font->numchars].advance = (bbox.xMax*FT_SCALE)/FT_SUBPIXELS;
+       } else {
+           font->glyph[font->numchars].advance = ((bbox.xMax - bbox.xMin)*FT_SCALE)/FT_SUBPIXELS;
+       }
+#else
+       font->glyph[font->numchars].advance = glyph->advance.x*20/65536;
+#endif
+       
+       font->glyph[font->numchars].shape = swf_ShapeDrawerToShape(&draw);
+       
+       font->layout->bounds[font->numchars].xmin = (bbox.xMin*FT_SCALE*20)/FT_SUBPIXELS;
+       font->layout->bounds[font->numchars].ymin = (bbox.yMin*FT_SCALE*20)/FT_SUBPIXELS;
+       font->layout->bounds[font->numchars].xmax = (bbox.xMax*FT_SCALE*20)/FT_SUBPIXELS;
+       font->layout->bounds[font->numchars].ymax = (bbox.yMax*FT_SCALE*20)/FT_SUBPIXELS;
+
        draw.dealloc(&draw);
-    
-       font->layout->bounds[t].xmin = (bbox.xMin*5*20)/266;
-       font->layout->bounds[t].ymin = (bbox.yMin*5*20)/266;
-       font->layout->bounds[t].xmax = (bbox.xMax*5*20)/266;
-       font->layout->bounds[t].ymax = (bbox.yMax*5*20)/266;
 
        FT_Done_Glyph(glyph);
+       font->glyph2ascii[font->numchars] = font->glyph2ascii[t];
+       glyph2glyph[t] = font->numchars;
+       font->numchars++;
     }
+    /* notice: if skipunused is true, font->glyph2ascii, font->glyphnames and font->layout->bounds will 
+              have more memory allocated than just font->numchars, but only the first font->numchars 
+              are used/valid */
+
+    for(t=0;t<font->maxascii;t++) {
+       if(font->ascii2glyph[t]>=0) {
+           font->ascii2glyph[t] = glyph2glyph[font->ascii2glyph[t]];
+       }
+    }
+    free(glyph2glyph);
 
     FT_Done_Face(face);
     FT_Done_FreeType(ftlibrary);ftlibrary=0;
 
     return font;
 }
-#else  //USE_FREETYPE
+#else  //HAVE_FREETYPE
 
 SWFFONT* swf_LoadTrueTypeFont(char*filename)
 {
@@ -225,6 +295,8 @@ SWFFONT* swf_LoadTrueTypeFont(char*filename)
 
 #include <t1lib.h>
 
+static int t1lib_initialized = 0;
+
 SWFFONT* swf_LoadT1Font(char*filename)
 {
     SWFFONT * font;
@@ -235,12 +307,16 @@ SWFFONT* swf_LoadT1Font(char*filename)
     int s,num;
     char*encoding[256];
     char**charnames;
-    char*charname;
-
-    T1_SetBitmapPad( 16);
-    if ((T1_InitLib(NO_LOGFILE)==NULL)){
-       fprintf(stderr, "Initialization of t1lib failed\n");
-       return 0;
+    char**charname;
+    int c;
+
+    if(!t1lib_initialized) {
+       T1_SetBitmapPad(16);
+       if ((T1_InitLib(NO_LOGFILE)==NULL)){
+           fprintf(stderr, "Initialization of t1lib failed\n");
+           return 0;
+       }
+       t1lib_initialized = 1;
     }
     nr = T1_AddFont(filename);
     T1_LoadFont(nr);
@@ -261,18 +337,21 @@ SWFFONT* swf_LoadT1Font(char*filename)
     memset(font, 0, sizeof(SWFFONT));
 
     font->version = 2;
-    font->name = (U8*)strdup(fontname);
+    if(fontname) 
+       font->name = (U8*)strdup(fontname);
+    else 
+       font->name = 0;
     font->layout = (SWFLAYOUT*)malloc(sizeof(SWFLAYOUT));
     memset(font->layout, 0, sizeof(SWFLAYOUT));
 
     num = 0;
-    charname = charnames[0];
+    charname = charnames;
     while(*charname) {
        charname++;
        num++;
     }
 
-    font->maxascii = 256;
+    font->maxascii = num;
     font->numchars = num;
     
     font->style = (/*bold*/0?FONT_STYLE_BOLD:0) + (angle>0.05?FONT_STYLE_ITALIC:0);
@@ -292,31 +371,69 @@ SWFFONT* swf_LoadT1Font(char*filename)
     memset(font->layout->bounds, 0, sizeof(SRECT)*num);
     font->layout->kerningcount = 0;
     font->layout->kerning = 0;
+    font->glyphnames = malloc(num*sizeof(char*));
+    memset(font->glyphnames, 0, num*sizeof(char*));
   
     num = 0;
-    
-    charname = charnames[0];
-    while(*charname) {
-       int c;
-       T1_OUTLINE * outline = T1_GetCharOutline(nr, c, 100.0, 0);
-       int firstx = outline->dest.x/0xffff;
 
-       font->ascii2glyph[s] = num;
-       font->glyph2ascii[num] = s;
-           
-       /* fix bounding box */
-       SHAPE2*shape2;
+    charname = charnames;
+    for(c=0;c<font->numchars;c++) {
+       drawer_t draw;
        SRECT bbox;
-       shape2 = swf_ShapeToShape2(font->glyph[s].shape);
-       if(!shape2) { fprintf(stderr, "Shape parse error\n");exit(1);}
-       bbox = swf_GetShapeBoundingBox(shape2);
-       swf_Shape2Free(shape2);
-       font->layout->bounds[num] = bbox;
-       //font->glyph[num].advance = (int)(width/6.4); // 128/20
-       font->glyph[num].advance = bbox.xmax/20;
-       if(!font->glyph[num].advance) {
-           font->glyph[num].advance = firstx;
+       T1_OUTLINE * outline;
+       FPOINT pos,last;
+       int firstx;
+       
+       outline = T1_GetCharOutline(nr, c, 100.0, 0);
+       firstx = outline->dest.x/0xffff;
+
+       pos.x = 0;
+       pos.y = 0;
+       last = pos;
+       
+       font->glyphnames[c] = strdup(*charname);
+
+       if(c<font->maxascii)
+           font->ascii2glyph[c] = c;
+       font->glyph2ascii[c] = c;
+       
+       swf_Shape01DrawerInit(&draw, 0);
+
+       while(outline) {
+           pos.x += (outline->dest.x/(float)0xffff);
+           pos.y += (outline->dest.y/(float)0xffff);
+
+           if(outline->type == T1_PATHTYPE_MOVE) {
+               draw.moveTo(&draw,&pos);
+           } else if(outline->type == T1_PATHTYPE_LINE) {
+               draw.lineTo(&draw,&pos);
+           } else if(outline->type == T1_PATHTYPE_BEZIER) {
+               T1_BEZIERSEGMENT*o2 = (T1_BEZIERSEGMENT*)outline;
+               FPOINT b,c;
+               b.x = o2->B.x/(float)0xffff+last.x;
+               b.y = o2->B.y/(float)0xffff+last.y;
+               c.x = o2->C.x/(float)0xffff+last.x;
+               c.y = o2->C.y/(float)0xffff+last.y;
+               draw_cubicTo(&draw,&b,&c,&pos);
+           } else {
+               fprintf(stderr, "loadT1Font: unknown outline type:%d\n", outline->type);
+           }
+           last = pos;
+           outline = outline->link;
        }
+       
+       draw.finish(&draw);
+
+       font->glyph[c].shape = swf_ShapeDrawerToShape(&draw);
+       bbox = swf_ShapeDrawerGetBBox(&draw);
+       draw.dealloc(&draw);
+           
+       font->layout->bounds[c] = bbox;
+       font->glyph[c].advance = bbox.xmax;
+       if(!font->glyph[c].advance) {
+           font->glyph[c].advance = firstx;
+       }
+       charname++;
     }
     return font;
 }
@@ -331,3 +448,39 @@ SWFFONT* swf_LoadT1Font(char*filename)
 
 #endif
 
+static int isSWF(const char*filename)
+{
+    FILE*fi = fopen(filename, "rb");
+    char a[8];
+    if(!fi) {
+       perror(filename);
+       return -1;
+    }
+    memset(a, 0, sizeof(a));
+    fread(a, 4, 1, fi);
+    fclose(fi);
+
+    if(!strncmp(a, "FWS", 3) || !strncmp(a, "CWS", 3)) {
+       return 1;
+    }
+    return 0;
+}
+
+SWFFONT* swf_LoadFont(char*filename)
+{
+    int is_swf = isSWF(filename);
+    if(is_swf<0)
+       return 0;
+    if(is_swf) {
+       return swf_ReadFont(filename);
+    }
+#if defined(HAVE_FREETYPE)
+    return swf_LoadTrueTypeFont(filename);
+#elif defined(HAVE_T1LIB)
+    return swf_LoadT1Font(filename);
+#else
+    fprintf(stderr, "Error: Neither T1lib nor FreeType support compiled in. Could not load %s\n", filename);
+    return 0;
+#endif
+}
+