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mpv/sub/font_load.c

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/*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "osdep/io.h"
#include "font_load.h"
#include "mp_msg.h"
#include "libavutil/attributes.h"
raw_file* load_raw(char *name,int verbose){
int bpp;
raw_file* raw=malloc(sizeof(raw_file));
unsigned char head[32];
FILE *f=fopen(name,"rb");
if(!f) goto err_out; // can't open
if(fread(head,32,1,f)<1) goto err_out; // too small
if(memcmp(head,"mhwanh",6)) goto err_out; // not raw file
raw->w=head[8]*256+head[9];
raw->h=head[10]*256+head[11];
raw->c=head[12]*256+head[13];
if(raw->w == 0) // 2 bytes were not enough for the width... read 4 bytes from the end of the header
raw->w = ((head[28]*0x100 + head[29])*0x100 + head[30])*0x100 + head[31];
if(raw->c>256) goto err_out; // too many colors!?
mp_msg(MSGT_OSD, MSGL_DBG2, "RAW: %s %d x %d, %d colors\n",name,raw->w,raw->h,raw->c);
if(raw->c){
raw->pal=malloc(raw->c*3);
fread(raw->pal,3,raw->c,f);
bpp=1;
} else {
raw->pal=NULL;
bpp=3;
}
raw->bmp=malloc(raw->h*raw->w*bpp);
fread(raw->bmp,raw->h*raw->w*bpp,1,f);
fclose(f);
return raw;
err_out:
if (f)
fclose(f);
free(raw);
return NULL;
}
extern int sub_unicode;
font_desc_t* read_font_desc(const char* fname,float factor,int verbose){
unsigned char sor[1024];
unsigned char sor2[1024];
font_desc_t *desc;
FILE *f = NULL;
char *dn;
char section[64];
int i,j;
int chardb=0;
int fontdb=-1;
int version av_unused;
int first=1;
desc=malloc(sizeof(font_desc_t));if(!desc) goto fail_out;
memset(desc,0,sizeof(font_desc_t));
f=fopen(fname,"rt");if(!f){ mp_msg(MSGT_OSD, MSGL_V, "font: can't open file: %s\n",fname); goto fail_out;}
i = strlen (fname) - 9;
if ((dn = malloc(i+1))){
strncpy (dn, fname, i);
dn[i]='\0';
}
desc->fpath = dn; // search in the same dir as fonts.desc
// set up some defaults, and erase table
desc->charspace=2;
desc->spacewidth=12;
desc->height=0;
for(i=0;i<65536;i++) desc->start[i]=desc->width[i]=desc->font[i]=-1;
section[0]=0;
while(fgets(sor,1020,f)){
unsigned char* p[8];
int pdb=0;
unsigned char *s=sor;
unsigned char *d=sor2;
int ec=' ';
int id=0;
sor[1020]=0;
/* skip files that look like: TTF (0x00, 0x01), PFM (0x00, 0x01), PFB
* (0x80, 0x01), PCF (0x01, 0x66), fon ("MZ"), gzipped (0x1f, 0x8b) */
if (first) {
if (!sor[0] || sor[1] == 1 || (sor[0] == 'M' && sor[1] == 'Z') || (sor[0] == 0x1f && sor[1] == 0x8b) || (sor[0] == 1 && sor[1] == 0x66)) {
mp_msg(MSGT_OSD, MSGL_ERR, "%s doesn't look like a bitmap font description, ignoring.\n", fname);
goto fail_out;
}
first = 0;
}
p[0]=d;++pdb;
while(1){
int c=*s++;
if(c==0 || c==13 || c==10) break;
if(!id){
if(c==39 || c==34){ id=c;continue;} // idezojel
if(c==';' || c=='#') break;
if(c==9) c=' ';
if(c==' '){
if(ec==' ') continue;
*d=0; ++d;
p[pdb]=d;++pdb;
if(pdb>=8) break;
continue;
}
} else {
if(id==c){ id=0;continue;} // idezojel
}
*d=c;d++;
ec=c;
}
if(d==sor2) continue; // skip empty lines
*d=0;
// printf("params=%d sor=%s\n",pdb,sor);
// for(i=0;i<pdb;i++) printf(" param %d = '%s'\n",i,p[i]);
if(pdb==1 && p[0][0]=='['){
int len=strlen(p[0]);
if(len && len<63 && p[0][len-1]==']'){
strcpy(section,p[0]);
mp_msg(MSGT_OSD, MSGL_DBG2, "font: Reading section: %s\n",section);
if(strcmp(section,"[files]")==0){
++fontdb;
if(fontdb>=16){ mp_msg(MSGT_OSD, MSGL_ERR, "font: Too many bitmaps defined.\n");goto fail_out;}
}
continue;
}
}
if(strcmp(section,"[fpath]")==0){
if(pdb==1){
free (desc->fpath); // release previously allocated memory
desc->fpath=strdup(p[0]);
continue;
}
} else
#ifdef __AMIGAOS4__
#define FONT_PATH_SEP ""
#else
//! path seperator for font paths, may not be more than one character
#define FONT_PATH_SEP "/"
#endif
if(strcmp(section,"[files]")==0){
char *default_dir=MPLAYER_DATADIR FONT_PATH_SEP "font";
if(pdb==2 && strcmp(p[0],"alpha")==0){
char *cp;
if (!(cp=malloc(strlen(desc->fpath)+strlen(p[1])+2))) goto fail_out;
snprintf(cp,strlen(desc->fpath)+strlen(p[1])+2,"%s" FONT_PATH_SEP "%s",
desc->fpath,p[1]);
if(!((desc->pic_a[fontdb]=load_raw(cp,verbose)))){
free(cp);
if (!(cp=malloc(strlen(default_dir)+strlen(p[1])+2)))
goto fail_out;
snprintf(cp,strlen(default_dir)+strlen(p[1])+2,"%s" FONT_PATH_SEP "%s",
default_dir,p[1]);
if (!((desc->pic_a[fontdb]=load_raw(cp,verbose)))){
mp_msg(MSGT_OSD, MSGL_ERR, "Can't load font bitmap: %s\n",p[1]);
free(cp);
goto fail_out;
}
}
free(cp);
continue;
}
if(pdb==2 && strcmp(p[0],"bitmap")==0){
char *cp;
if (!(cp=malloc(strlen(desc->fpath)+strlen(p[1])+2))) goto fail_out;
snprintf(cp,strlen(desc->fpath)+strlen(p[1])+2,"%s" FONT_PATH_SEP "%s",
desc->fpath,p[1]);
if(!((desc->pic_b[fontdb]=load_raw(cp,verbose)))){
free(cp);
if (!(cp=malloc(strlen(default_dir)+strlen(p[1])+2)))
goto fail_out;
snprintf(cp,strlen(default_dir)+strlen(p[1])+2,"%s" FONT_PATH_SEP "%s",
default_dir,p[1]);
if (!((desc->pic_b[fontdb]=load_raw(cp,verbose)))){
mp_msg(MSGT_OSD, MSGL_ERR, "Can't load font bitmap: %s\n",p[1]);
free(cp);
goto fail_out;
}
}
free(cp);
continue;
}
} else
if(strcmp(section,"[info]")==0){
if(pdb==2 && strcmp(p[0],"name")==0){
desc->name=strdup(p[1]);
continue;
}
if(pdb==2 && strcmp(p[0],"descversion")==0){
version=atoi(p[1]);
continue;
}
if(pdb==2 && strcmp(p[0],"spacewidth")==0){
desc->spacewidth=atoi(p[1]);
continue;
}
if(pdb==2 && strcmp(p[0],"charspace")==0){
desc->charspace=atoi(p[1]);
continue;
}
if(pdb==2 && strcmp(p[0],"height")==0){
desc->height=atoi(p[1]);
continue;
}
} else
if(strcmp(section,"[characters]")==0){
if(pdb==3){
int chr=p[0][0];
int start=atoi(p[1]);
int end=atoi(p[2]);
if(sub_unicode && (chr>=0x80)) chr=(chr<<8)+p[0][1];
else if(strlen(p[0])!=1) chr=strtol(p[0],NULL,0);
if(end<start) {
mp_msg(MSGT_OSD, MSGL_WARN, "error in font desc: end<start for char '%c'\n",chr);
} else {
desc->start[chr]=start;
desc->width[chr]=end-start+1;
desc->font[chr]=fontdb;
// printf("char %d '%c' start=%d width=%d\n",chr,chr,desc->start[chr],desc->width[chr]);
++chardb;
}
continue;
}
}
mp_msg(MSGT_OSD, MSGL_ERR, "Syntax error in font desc: %s",sor);
goto fail_out;
}
fclose(f);
f = NULL;
if (first == 1) {
mp_msg(MSGT_OSD, MSGL_ERR, "%s is empty or a directory, ignoring.\n", fname);
goto fail_out;
}
//printf("font: pos of U = %d\n",desc->start[218]);
for(i=0;i<=fontdb;i++){
if(!desc->pic_a[i] || !desc->pic_b[i]){
mp_msg(MSGT_OSD, MSGL_ERR, "font: Missing bitmap(s) for sub-font #%d\n",i);
goto fail_out;
}
//if(factor!=1.0f)
{
// re-sample alpha
int f=factor*256.0f;
int size=desc->pic_a[i]->w*desc->pic_a[i]->h;
int j;
mp_msg(MSGT_OSD, MSGL_DBG2, "font: resampling alpha by factor %5.3f (%d) ",factor,f);fflush(stdout);
for(j=0;j<size;j++){
int x=desc->pic_a[i]->bmp[j]; // alpha
int y=desc->pic_b[i]->bmp[j]; // bitmap
#ifdef FAST_OSD
x=(x<(255-f))?0:1;
#else
x=255-((x*f)>>8); // scale
//if(x<0) x=0; else if(x>255) x=255;
//x^=255; // invert
if(x+y>255) x=255-y; // to avoid overflows
//x=0;
//x=((x*f*(255-y))>>16);
//x=((x*f*(255-y))>>16)+y;
//x=(x*f)>>8;if(x<y) x=y;
if(x<1) x=1; else
if(x>=252) x=0;
#endif
desc->pic_a[i]->bmp[j]=x;
// desc->pic_b[i]->bmp[j]=0; // hack
}
mp_msg(MSGT_OSD, MSGL_DBG2, "DONE!\n");
}
if(!desc->height) desc->height=desc->pic_a[i]->h;
}
j='_';if(desc->font[j]<0) j='?';
for(i=0;i<65536;i++)
if(desc->font[i]<0){
desc->start[i]=desc->start[j];
desc->width[i]=desc->width[j];
desc->font[i]=desc->font[j];
}
desc->font[' ']=-1;
desc->width[' ']=desc->spacewidth;
mp_msg(MSGT_OSD, MSGL_V, "Bitmap font %s loaded successfully! (%d chars)\n",fname,chardb);
return desc;
fail_out:
if (f)
fclose(f);
free(desc->fpath);
free(desc->name);
free(desc);
return NULL;
}
#ifndef CONFIG_FREETYPE
void render_one_glyph(font_desc_t *desc, int c) {}
int kerning(font_desc_t *desc, int prevc, int c) { return 0; }
#endif
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