/*
ttf2png - True Type Font to PNG converter
-Copyright (c) 2004-2007 Mikko Rasa
+Copyright (c) 2004-2008 Mikko Rasa
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
*/
#include <stdio.h>
+#include <ctype.h>
#include <unistd.h>
#include <getopt.h>
#include <png.h>
#include <ft2build.h>
#include FT_FREETYPE_H
-typedef struct sGlyphDef
+typedef struct sImage
{
- int code;
- int x,y;
- int w,h;
- int offset_x;
- int offset_y;
- int advance;
-} GlyphDef;
+ unsigned w, h;
+ char *data;
+} Image;
+
+typedef struct sGlyph
+{
+ unsigned code;
+ Image image;
+ unsigned x, y;
+ int offset_x;
+ int offset_y;
+ int advance;
+} Glyph;
+
+typedef struct sFont
+{
+ unsigned size;
+ int ascent;
+ int descent;
+ unsigned n_glyphs;
+ Glyph *glyphs;
+ Image image;
+} Font;
unsigned round_to_pot(unsigned);
void usage();
-int save_defs(const char *, const GlyphDef *, int, int, int, int, int, int);
-int save_png(const char *, const char *, int, int, char);
+void init_font(Font *, FT_Face, unsigned, unsigned, int);
+void render_grid(Font *, unsigned, unsigned, int);
+void render_packed(Font *);
+int save_defs(const char *, const Font *);
+int save_png(const char *, const Image *, char);
char verbose=0;
int begin=0;
int end=255;
int size=10;
- int cpl=16;
- int cell=16;
+ int cpl=0;
+ int cell=0;
char autohinter=0;
char seq=0;
char alpha=0;
+ char pack=0;
FT_Library freetype;
FT_Face face;
- int ch,cw;
- int ascent;
- int descent;
int err;
int i;
- int count;
- int w,h;
- char *data;
char *out_fn="font.png";
char *def_fn=NULL;
- GlyphDef *defs=NULL;
+
+ Font font;
if(argc<2)
{
return 1;
}
- while((i=getopt(argc, argv, "r:s:l:c:o:atvh?ed:"))!=-1)
+ while((i=getopt(argc, argv, "r:s:l:c:o:atvh?ed:p"))!=-1)
{
char *ptr;
int temp;
case 'd':
def_fn=optarg;
break;
+ case 'p':
+ pack=1;
+ break;
}
}
if(!strcmp(out_fn, "-"))
{
const char *name=FT_Get_Postscript_Name(face);
printf("Font name: %s\n", name);
- printf("Glyphs: %ld\n", face->num_glyphs);
+ printf("Glyphs: %ld\n", face->num_glyphs);
}
err=FT_Set_Pixel_Sizes(face, 0, size);
fprintf(stderr, "Couldn't set size\n");
return 1;
}
- ascent=(face->bbox.yMax*face->size->metrics.y_scale)>>16;
- ascent=(ascent+63)/64;
- descent=(face->bbox.yMin*face->size->metrics.y_scale)>>16;
- descent=(ascent+63)/64;
- ch=((face->bbox.yMax-face->bbox.yMin)*face->size->metrics.y_scale)>>16;
- ch=(ch+63)/64;
- cw=((face->bbox.xMax-face->bbox.xMin)*face->size->metrics.x_scale)>>16;
- cw=(cw+63)/64;
- if(verbose)
- {
- printf("Ascent %d\n", ascent);
- printf("Descent %d\n", descent);
- printf("Max height %d\n", ch);
- printf("Max width %d\n", cw);
- }
- if(verbose>=1 && (ch>cell || cw>cell)) fprintf(stderr,"Warning: character size exceeds cell size\n");
- w=round_to_pot(cpl*cell);
- if(seq && face->num_glyphs<end-begin)
- h=(face->num_glyphs+cpl-1)/cpl*cell;
+ font.size=size;
+ init_font(&font, face, begin, end, autohinter);
+ if(pack)
+ render_packed(&font);
else
- h=(end-begin+cpl-1)/cpl*cell;
- h=round_to_pot(h);
-
- data=(char *)malloc(w*h);
- memset(data, 255, w*h);
-
+ render_grid(&font, cell, cpl, seq);
+ save_png(out_fn, &font.image, alpha);
if(def_fn)
- {
- if(face->num_glyphs<end-begin)
- count=face->num_glyphs;
- else
- count=end-begin;
-
- defs=(GlyphDef *)malloc(count*sizeof(GlyphDef));
- }
+ save_defs(def_fn, &font);
- count=0;
- for(i=begin; i<=end; ++i)
- {
- int glyph=FT_Get_Char_Index(face,i);
- FT_Bitmap *bmp=&face->glyph->bitmap;
- int x,y;
- int cx,cy;
- int flags=0;
- int dy;
+ for(i=0; i<font.n_glyphs; ++i)
+ free(font.glyphs[i].image.data);
+ free(font.glyphs);
+ free(font.image.data);
- if(!glyph) continue;
-
- if(seq)
- {
- cx=(count%cpl)*cell;
- cy=(count/cpl)*cell;
- }
- else
- {
- cx=(i%cpl)*cell;
- cy=(i/cpl)*cell;
- }
-
- if(autohinter)
- flags|=FT_LOAD_FORCE_AUTOHINT;
- FT_Load_Glyph(face, glyph, flags);
- FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL);
- if(cell>bmp->width)
- cx+=(cell-bmp->width)/2;
- dy=ascent-face->glyph->bitmap_top;
- cy+=dy;
-
- if(verbose>=2)
- {
- printf(" Char %d: glyph %d, size %dx%d\n", i, glyph, bmp->width, bmp->rows);
- if(bmp->width>cell || dy+bmp->rows>cell || dy<0) printf(" Warning: Character %d does not fit in cell\n", i);
- }
-
- if(bmp->pitch<0)
- {
- fprintf(stderr, "Warning: Character %d not rendered (can't handle reversed bitmaps)\n", i);
- continue;
- }
-
- for(y=0; y<bmp->rows; ++y) for(x=0; x<bmp->width; ++x)
- {
- if(cx+x<0 || cx+x>=w || cy+y<0 || cy+y>=h) continue;
- data[cx+x+(cy+y)*w]=255-bmp->buffer[x+y*bmp->pitch];
- }
-
- if(def_fn)
- {
- defs[count].code=i;
- defs[count].x=cx;
- defs[count].y=cy;
- defs[count].w=bmp->width;
- defs[count].h=bmp->rows;
- defs[count].offset_x=face->glyph->bitmap_left;
- defs[count].offset_y=face->glyph->bitmap_top-bmp->rows;
- defs[count].advance=(int)(face->glyph->advance.x+32)/64;
- }
-
- ++count;
- }
-
- while(seq && h/2>=(count+cpl-1)/cpl*cell)
- h/=2;
-
- if(def_fn)
- save_defs(def_fn, defs, count, w, h, size, ascent, descent);
- save_png(out_fn, data, w, h, alpha);
-
- if(verbose) printf("Converted %d glyphs\n", count);
+ FT_Done_Face(face);
+ FT_Done_FreeType(freetype);
return 0;
}
void usage()
{
printf("ttf2png - True Type Font to PNG converter\n"
- "Copyright (c) 2004 Mikkosoft Productions\n"
+ "Copyright (c) 2004-2008 Mikko Rasa, Mikkosoft Productions\n"
"Distributed under the GNU General Public License\n\n"
"Usage: ttf2png [options] <TTF file>\n\n"
"Accepted options (default values in [brackets])\n"
" -r Range of characters to convert in the format low,high [0,255]\n"
" -s Font size to use, in pixels [10]\n"
- " -l Number of characters to put in one line [16]\n"
- " -c Character cell size, in pixels [16]\n"
+ " -l Number of characters to put in one line [auto]\n"
+ " -c Character cell size, in pixels [auto]\n"
" -o Output file name (or - for stdout) [font.png]\n"
" -a Force autohinter\n"
" -t Render font to alpha channel\n"
" -v Increase the level of verbosity\n"
" -e Use cells in sequence, rather than by code\n"
+ " -p Pack the glyphs tightly instead of in a grid\n"
" -d Write a definition to the given file\n"
" -h Print this message\n");
}
-int save_defs(const char *fn, const GlyphDef *defs, int count, int w, int h, int size, int ascent, int descent)
+void init_font(Font *font, FT_Face face, unsigned first, unsigned last, int autohinter)
{
- FILE *out;
- int i;
+ unsigned i;
+ unsigned size=0;
+
+ font->ascent=(face->size->metrics.ascender+63)>>6;
+ font->descent=(face->size->metrics.descender+63)>>6;
+
+ if(verbose>=1)
+ {
+ printf("Ascent: %d\n", font->ascent);
+ printf("Descent: %d\n", font->descent);
+ }
+
+ font->n_glyphs=0;
+ font->glyphs=NULL;
+ for(i=first; i<=last; ++i)
+ {
+ unsigned n;
+ FT_Bitmap *bmp=&face->glyph->bitmap;
+ int x, y;
+ int flags=0;
+ Glyph *glyph;
+
+ n=FT_Get_Char_Index(face, i);
+ if(!n) continue;
+
+ if(autohinter)
+ flags|=FT_LOAD_FORCE_AUTOHINT;
+ FT_Load_Glyph(face, n, flags);
+ FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL);
+
+ if(verbose>=2)
+ printf(" Char %u: glyph %u, size %dx%d\n", i, n, bmp->width, bmp->rows);
+
+ if(bmp->pixel_mode!=FT_PIXEL_MODE_GRAY)
+ {
+ fprintf(stderr, "Warning: Glyph %u skipped, not grayscale\n", n);
+ continue;
+ }
+
+ if(font->n_glyphs>=size)
+ {
+ size+=16;
+ font->glyphs=(Glyph *)realloc(font->glyphs, size*sizeof(Glyph));
+ }
+
+ glyph=&font->glyphs[font->n_glyphs++];
+ glyph->code=i;
+ glyph->image.w=bmp->width;
+ glyph->image.h=bmp->rows;
+ glyph->image.data=(char *)malloc(bmp->width*bmp->rows);
+ glyph->offset_x=face->glyph->bitmap_left;
+ glyph->offset_y=face->glyph->bitmap_top-bmp->rows;
+ glyph->advance=(int)(face->glyph->advance.x+32)/64;
+
+ if(bmp->pitch<0)
+ {
+ for(y=0; y<bmp->rows; ++y) for(x=0; x<bmp->width; ++x)
+ glyph->image.data[x+(glyph->image.h-1-y)*glyph->image.w]=bmp->buffer[x-y*bmp->pitch];
+ }
+ else
+ {
+ for(y=0; y<bmp->rows; ++y) for(x=0; x<bmp->width; ++x)
+ glyph->image.data[x+y*glyph->image.w]=bmp->buffer[x+y*bmp->pitch];
+ }
+ }
+
+ if(verbose>=1)
+ printf("Loaded %u glyphs\n", font->n_glyphs);
+}
+
+void render_grid(Font *font, unsigned cell, unsigned cpl, int seq)
+{
+ unsigned i;
+ int top=0, bot=0;
+ unsigned first, last;
+ unsigned maxw=0, maxh=0;
+
+ for(i=1;; i<<=1)
+ {
+ first=font->glyphs[0].code&~(i-1);
+ last=first+i-1;
+ if(last>=font->glyphs[font->n_glyphs-1].code)
+ break;
+ }
+
+ for(i=0; i<font->n_glyphs; ++i)
+ {
+ int y;
+
+ y=font->glyphs[i].offset_y+font->glyphs[i].image.h;
+ if(y>top)
+ top=y;
+ if(font->glyphs[i].offset_y<bot)
+ bot=font->glyphs[i].offset_y;
+ if(font->glyphs[i].image.w>maxw)
+ maxw=font->glyphs[i].image.w;
+ if(font->glyphs[i].image.h>maxh)
+ maxh=font->glyphs[i].image.h;
+ }
+
+ if(cell==0)
+ {
+ cell=top-bot;
+ if(maxw>cell)
+ cell=maxw;
+ }
+
+ if(verbose>=1)
+ {
+ printf("Max size: %u x %u\n", maxw, maxh);
+ printf("Y range: [%d %d]\n", bot, top);
+ if(maxw>cell || top-bot>cell)
+ fprintf(stderr,"Warning: character size exceeds cell size (%d)\n", cell);
+ }
+
+ if(cpl==0)
+ {
+ unsigned count=(seq ? font->n_glyphs : last-first+1);
+ for(i=1;; i<<=1)
+ {
+ cpl=i/cell;
+ if(cpl>0 && (count+cpl-1)/cpl<=cpl)
+ break;
+ }
+ }
+
+ font->image.w=round_to_pot(cpl*cell);
+ if(seq && font->n_glyphs<last-first+1)
+ font->image.h=(font->n_glyphs+cpl-1)/cpl*cell;
+ else
+ font->image.h=(last-first+cpl)/cpl*cell;
+ font->image.h=round_to_pot(font->image.h);
+
+ font->image.data=(char *)malloc(font->image.w*font->image.h);
+ memset(font->image.data, 255, font->image.w*font->image.h);
+
+ for(i=0; i<font->n_glyphs; ++i)
+ {
+ Glyph *glyph;
+ int cx, cy;
+ unsigned x, y;
+
+ glyph=&font->glyphs[i];
+
+ if(seq)
+ {
+ cx=(i%cpl)*cell;
+ cy=(i/cpl)*cell;
+ }
+ else
+ {
+ cx=((glyph->code-first)%cpl)*cell;
+ cy=((glyph->code-first)/cpl)*cell;
+ }
+
+ if(cell>glyph->image.w)
+ cx+=(cell-glyph->image.w)/2;
+ cy+=top-glyph->offset_y-glyph->image.h;
+
+ glyph->x=cx;
+ glyph->y=cy;
+
+ for(y=0; y<glyph->image.h; ++y) for(x=0; x<glyph->image.w; ++x)
+ {
+ if(cx+x<0 || cx+x>=font->image.w || cy+y<0 || cy+y>=font->image.h) continue;
+ font->image.data[cx+x+(cy+y)*font->image.w]=255-glyph->image.data[x+y*glyph->image.w];
+ }
+ }
+}
+
+void render_packed(Font *font)
+{
+ unsigned i;
+ unsigned area=0;
+ unsigned last_h=0xFFFF;
+ char *used_glyphs;
+ char *used_pixels;
+ unsigned cx=0, cy;
+
+ for(i=0; i<font->n_glyphs; ++i)
+ area+=(font->glyphs[i].image.w+1)*(font->glyphs[i].image.h+1);
+
+ for(font->image.w=1;; font->image.w<<=1)
+ {
+ font->image.h=(area*5/4)/font->image.w;
+ if(font->image.h<=font->image.w)
+ break;
+ }
+ font->image.h=round_to_pot(font->image.h);
+
+ font->image.data=(char *)malloc(font->image.w*font->image.h);
+ memset(font->image.data, 255, font->image.w*font->image.h);
+ used_pixels=(char *)malloc(font->image.w*font->image.h);
+ memset(used_pixels, 0, font->image.w*font->image.h);
+ used_glyphs=(char *)malloc(font->n_glyphs);
+ memset(used_glyphs, 0, font->n_glyphs);
+
+ for(cy=0; cy<font->image.h;)
+ {
+ unsigned w;
+ unsigned x, y;
+ Glyph *glyph=NULL;
+ unsigned best_score=0;
+
+ for(; (cx<font->image.w && used_pixels[cx+cy*font->image.w]); ++cx);
+ if(cx>=font->image.w)
+ {
+ cx=0;
+ ++cy;
+ last_h=0xFFFF;
+ continue;
+ }
+ for(w=0; (cx+w<font->image.w && !used_pixels[cx+w+cy*font->image.w]); ++w);
+
+ for(i=0; i<font->n_glyphs; ++i)
+ {
+ Glyph *g;
+
+ g=&font->glyphs[i];
+ if(!used_glyphs[i] && g->image.w<=w)
+ {
+ unsigned score;
+
+ score=g->image.h+1;
+ if(g->image.h==last_h)
+ score*=g->image.w;
+ else
+ score+=g->image.w;
+
+ if(score>best_score)
+ {
+ glyph=g;
+ best_score=score;
+ }
+ }
+ }
+
+ if(!glyph)
+ {
+ cx+=w;
+ continue;
+ }
+
+ used_glyphs[glyph-font->glyphs]=1;
+ glyph->x=cx;
+ glyph->y=cy;
+
+ for(y=0; y<glyph->image.h; ++y) for(x=0; x<glyph->image.w; ++x)
+ {
+ if(cx+x<0 || cx+x>=font->image.w || cy+y<0 || cy+y>=font->image.h) continue;
+ font->image.data[cx+x+(cy+y)*font->image.w]=255-glyph->image.data[x+y*glyph->image.w];
+ }
+ for(y=0; y<glyph->image.h+2; ++y) for(x=0; x<glyph->image.w+2; ++x)
+ {
+ if(cx+x<1 || cx+x>font->image.w || cy+y<1 || cy+y>font->image.h) continue;
+ used_pixels[cx+x-1+(cy+y-1)*font->image.w]=1;
+ }
+
+ last_h=glyph->image.h;
+ }
+}
+
+int save_defs(const char *fn, const Font *font)
+{
+ FILE *out;
+ unsigned i;
out=fopen(fn, "w");
if(!out)
return -1;
}
- fprintf(out, "%d %d %d %d %d\n", w, h, size, ascent, descent);
- for(i=0; i<count; ++i)
+ fprintf(out, "%d %d %d %d %d\n", font->image.w, font->image.h, font->size, font->ascent, font->descent);
+ for(i=0; i<font->n_glyphs; ++i)
{
- const GlyphDef *d=defs+i;
- fprintf(out, "%d %d %d %d %d %d %d %d\n", d->code, d->x, d->y, d->w, d->h, d->offset_x, d->offset_y, d->advance);
+ const Glyph *g=&font->glyphs[i];
+ fprintf(out, "%u %u %u %u %u %d %d %d\n", g->code, g->x, g->y, g->image.w, g->image.h, g->offset_x, g->offset_y, g->advance);
}
fclose(out);
return 0;
}
-int save_png(const char *fn, const char *data, int w, int h, char alpha)
+int save_png(const char *fn, const Image *image, char alpha)
{
FILE *out;
png_struct *pngs;
png_info *pngi;
- png_byte *rows[h];
+ png_byte *rows[image->h];
int i;
png_byte *data2;
int color;
png_init_io(pngs, out);
if(alpha)
{
- data2=(png_byte *)malloc(w*h*2);
- for(i=0; i<w*h; ++i)
+ data2=(png_byte *)malloc(image->w*image->h*2);
+ for(i=0; i<image->w*image->h; ++i)
{
data2[i*2]=255;
- data2[i*2+1]=255-data[i];
+ data2[i*2+1]=255-image->data[i];
}
- for(i=0; i<h; ++i)
- rows[i]=(png_byte *)(data2+i*w*2);
+ for(i=0; i<image->h; ++i)
+ rows[i]=(png_byte *)(data2+i*image->w*2);
color=PNG_COLOR_TYPE_GRAY_ALPHA;
}
else
{
- for(i=0; i<h; ++i)
- rows[i]=(png_byte *)(data+i*w);
+ for(i=0; i<image->h; ++i)
+ rows[i]=(png_byte *)(image->data+i*image->w);
color=PNG_COLOR_TYPE_GRAY;
}
- png_set_IHDR(pngs, pngi, w, h, 8, color, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
+ png_set_IHDR(pngs, pngi, image->w, image->h, 8, color, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
png_set_rows(pngs, pngi, rows);
png_write_png(pngs, pngi, PNG_TRANSFORM_IDENTITY, NULL);
png_destroy_write_struct(&pngs, &pngi);
- if(alpha) free(data2);
+ if(alpha)
+ free(data2);
- if(verbose) printf("Saved %dx%d PNG image to %s\n", w, h, fn);
+ if(verbose) printf("Saved %dx%d PNG image to %s\n", image->w, image->h, fn);
+
+ fclose(out);
return 0;
}
projects / ttf2png.git / commitdiff