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mpv/libvo/font_load.c

258 lines
6.4 KiB
C
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "font_load.h"
char *get_path ( char * );
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) return NULL; // can't open
if(fread(head,32,1,f)<1) return NULL; // too small
if(memcmp(head,"mhwanh",6)) return NULL; // 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->c>256) return NULL; // too many colors!?
if(verbose) printf("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;
}
font_desc_t* read_font_desc(char* fname,float factor,int verbose){
unsigned char sor[1024];
unsigned char sor2[1024];
font_desc_t *desc;
FILE *f;
char section[64];
int i,j;
int chardb=0;
int fontdb=-1;
int version=0;
desc=malloc(sizeof(font_desc_t));if(!desc) return NULL;
memset(desc,0,sizeof(font_desc_t));
f=fopen(fname,"rt");if(!f){ printf("font: can't open file: %s\n",fname); return NULL;}
// set up some defaults, and erase table
desc->charspace=2;
desc->spacewidth=12;
desc->height=0;
for(i=0;i<512;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;
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]);
if(verbose) printf("font: Reading section: %s\n",section);
if(strcmp(section,"[files]")==0){
++fontdb;
if(fontdb>=16){ printf("font: Too many bitmaps defined!\n");return NULL;}
}
continue;
}
}
if(strcmp(section,"[files]")==0){
if(pdb==2 && strcmp(p[0],"alpha")==0){
char *cp,*cp2;
if (!(cp=get_path("font/"))) return NULL;
if (!(cp2=malloc(strlen(cp)+strlen(p[1])+1))) {
free(cp);
return NULL;
}
sprintf(cp2,"%s%s",cp,p[1]);
if(!((desc->pic_a[fontdb]=load_raw(cp2,verbose)))){
printf("Can't load font bitmap: %s\n",p[1]);
free(cp);
free(cp2);
return NULL;
}
free(cp);
free(cp2);
continue;
}
if(pdb==2 && strcmp(p[0],"bitmap")==0){
char *cp,*cp2;
if (!(cp=get_path("font/"))) return NULL;
if (!(cp2=malloc(strlen(cp)+strlen(p[1])+1))) {
free(cp);
return NULL;
}
sprintf(cp2,"%s%s",cp,p[1]);
if(!((desc->pic_b[fontdb]=load_raw(cp2,verbose)))){
printf("Can't load font bitmap: %s\n",p[1]);
free(cp);
free(cp2);
return NULL;
}
free(cp);
free(cp2);
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(chr>=0x80) chr=(chr<<8)+p[0][1];
else if(strlen(p[0])!=1) chr=strtol(p[0],NULL,0);
if(end<start) {
printf("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;
}
}
printf("Syntax error in font desc: %s\n",sor);
}
fclose(f);
//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]){
printf("font: Missing bitmap(s) for sub-font #%d\n",i);
return NULL;
}
//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;
if(verbose) printf("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];
int y=desc->pic_b[i]->bmp[j];
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;
desc->pic_a[i]->bmp[j]=x;
// desc->pic_b[i]->bmp[j]=0; // hack
}
if(verbose) printf("DONE!\n");
}
if(!desc->height) desc->height=desc->pic_a[i]->h;
}
j='_';if(desc->font[j]<0) j='?';
for(i=0;i<512;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;
printf("Font %s loaded successfully! (%d chars)\n",fname,chardb);
return desc;
}
#if 0
int main(){
read_font_desc("high_arpi.desc",1);
}
#endif
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