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mpv/libvo/font_load_ft.c

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/*
* Renders antialiased fonts for mplayer using freetype library.
* Should work with TrueType, Type1 and any other font supported by libfreetype.
*
* Artur Zaprzala <zybi@fanthom.irc.pl>
*
* ported inside mplayer by Jindrich Makovicka
* <makovick@kmlinux.fjfi.cvut.cz>
*
*/
#include "config.h"
#ifdef HAVE_FREETYPE
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <iconv.h>
#include <freetype/freetype.h>
#include <freetype/ftglyph.h>
#include "../bswap.h"
#include "font_load.h"
#include "mp_msg.h"
#include "../mplayer.h"
#include "osd_font.h"
#if (FREETYPE_MAJOR > 2) || (FREETYPE_MAJOR == 2 && FREETYPE_MINOR >= 1)
#define HAVE_FREETYPE21
#endif
char *get_path(char *filename);
char *subtitle_font_encoding = NULL;
float text_font_scale_factor = 5.0;
float osd_font_scale_factor = 6.0;
float subtitle_font_radius = 2.0;
float subtitle_font_thickness = 2.0;
// 0 = no autoscale
// 1 = video height
// 2 = video width
// 3 = diagonal
int subtitle_autoscale = 3;
int vo_image_width = 0;
int vo_image_height = 0;
int force_load_font;
int using_freetype = 0;
//// constants
static unsigned int const colors = 256;
static unsigned int const maxcolor = 255;
static unsigned const base = 256;
static unsigned const first_char = 33;
#define MAX_CHARSET_SIZE 60000
static FT_Library library;
#define OSD_CHARSET_SIZE 15
static FT_ULong osd_charset[OSD_CHARSET_SIZE] =
{
0xe001, 0xe002, 0xe003, 0xe004, 0xe005, 0xe006, 0xe007, 0xe008,
0xe009, 0xe00a, 0xe00b, 0xe010, 0xe011, 0xe012, 0xe013
};
static FT_ULong osd_charcodes[OSD_CHARSET_SIZE] =
{
0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,
0x09,0x0a,0x0b,0x10,0x11,0x12,0x13
};
#define f266ToInt(x) (((x)+32)>>6) // round fractional fixed point number to integer
// coordinates are in 26.6 pixels (i.e. 1/64th of pixels)
#define f266CeilToInt(x) (((x)+63)>>6) // ceiling
#define f266FloorToInt(x) ((x)>>6) // floor
#define f1616ToInt(x) (((x)+0x8000)>>16) // 16.16
#define floatTof266(x) ((int)((x)*(1<<6)+0.5))
#define ALIGN(x) (((x)+7)&~7) // 8 byte align
#define WARNING(msg, args...) mp_msg(MSGT_OSD, MSGL_WARN, msg "\n", ## args)
#define DEBUG 0
//static double ttime;
static void paste_bitmap(unsigned char *bbuffer, FT_Bitmap *bitmap, int x, int y, int width, int height, int bwidth) {
int drow = x+y*width;
int srow = 0;
int sp, dp, w, h;
if (bitmap->pixel_mode==ft_pixel_mode_mono)
for (h = bitmap->rows; h>0 && height > 0; --h, height--, drow+=width, srow+=bitmap->pitch)
for (w = bwidth, sp=dp=0; w>0; --w, ++dp, ++sp)
bbuffer[drow+dp] = (bitmap->buffer[srow+sp/8] & (0x80>>(sp%8))) ? 255:0;
else
for (h = bitmap->rows; h>0 && height > 0; --h, height--, drow+=width, srow+=bitmap->pitch)
for (w = bwidth, sp=dp=0; w>0; --w, ++dp, ++sp)
bbuffer[drow+dp] = bitmap->buffer[srow+sp];
}
static int check_font(font_desc_t *desc, float ppem, int padding, int pic_idx,
int charset_size, FT_ULong *charset, FT_ULong *charcodes,
int unicode) {
FT_Error error;
FT_Face face = desc->faces[pic_idx];
int const load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING;
int ymin = INT_MAX, ymax = INT_MIN;
int space_advance = 20;
int width, height;
unsigned char *bbuffer;
int i, uni_charmap = 1;
error = FT_Select_Charmap(face, ft_encoding_unicode);
// fprintf(stderr, "select unicode charmap: %d\n", error);
if (face->charmap==NULL || face->charmap->encoding!=ft_encoding_unicode) {
WARNING("Unicode charmap not available for this font. Very bad!");
uni_charmap = 0;
error = FT_Set_Charmap(face, face->charmaps[0]);
if (error) WARNING("No charmaps! Strange.");
}
/* set size */
if (FT_IS_SCALABLE(face)) {
error = FT_Set_Char_Size(face, 0, floatTof266(ppem), 0, 0);
if (error) WARNING("FT_Set_Char_Size failed.");
} else {
int j = 0;
int jppem = face->available_sizes[0].height;
/* find closest size */
for (i = 0; i<face->num_fixed_sizes; ++i) {
if (fabs(face->available_sizes[i].height - ppem) < abs(face->available_sizes[i].height - jppem)) {
j = i;
jppem = face->available_sizes[i].height;
}
}
WARNING("Selected font is not scalable. Using ppem=%i.", face->available_sizes[j].height);
error = FT_Set_Pixel_Sizes(face, face->available_sizes[j].width, face->available_sizes[j].height);
if (error) WARNING("FT_Set_Pixel_Sizes failed.");
}
if (FT_IS_FIXED_WIDTH(face))
WARNING("Selected font is fixed-width.");
/* compute space advance */
error = FT_Load_Char(face, ' ', load_flags);
if (error) WARNING("spacewidth set to default.");
else space_advance = f266ToInt(face->glyph->advance.x);
if (!desc->spacewidth) desc->spacewidth = 2*padding + space_advance;
if (!desc->charspace) desc->charspace = -2*padding;
if (!desc->height) desc->height = f266ToInt(face->size->metrics.height);
for (i= 0; i<charset_size; ++i) {
FT_ULong character, code;
FT_UInt glyph_index;
character = charset[i];
code = charcodes[i];
desc->font[unicode?character:code] = pic_idx;
// get glyph index
if (character==0)
glyph_index = 0;
else {
glyph_index = FT_Get_Char_Index(face, uni_charmap ? character:code);
if (glyph_index==0) {
WARNING("Glyph for char 0x%02x|U+%04X|%c not found.", code, character,
code<' '||code>255 ? '.':code);
desc->font[unicode?character:code] = -1;
continue;
}
}
desc->glyph_index[unicode?character:code] = glyph_index;
}
// fprintf(stderr, "font height: %lf\n", (double)(face->bbox.yMax-face->bbox.yMin)/(double)face->units_per_EM*ppem);
// fprintf(stderr, "font width: %lf\n", (double)(face->bbox.xMax-face->bbox.xMin)/(double)face->units_per_EM*ppem);
ymax = (double)(face->bbox.yMax)/(double)face->units_per_EM*ppem+1;
ymin = (double)(face->bbox.yMin)/(double)face->units_per_EM*ppem-1;
width = ppem*(face->bbox.xMax-face->bbox.xMin)/face->units_per_EM+3+2*padding;
if (desc->max_width < width) desc->max_width = width;
width = ALIGN(width);
desc->pic_b[pic_idx]->charwidth = width;
if (width <= 0) {
mp_msg(MSGT_OSD, MSGL_ERR, "Wrong bounding box, width <= 0 !\n");
return -1;
}
if (ymax<=ymin) {
mp_msg(MSGT_OSD, MSGL_ERR, "Something went wrong. Use the source!\n");
return -1;
}
height = ymax - ymin + 2*padding;
if (height <= 0) {
mp_msg(MSGT_OSD, MSGL_ERR, "Wrong bounding box, height <= 0 !\n");
return -1;
}
if (desc->max_height < height) desc->max_height = height;
desc->pic_b[pic_idx]->charheight = height;
// fprintf(stderr, "font height2: %d\n", height);
desc->pic_b[pic_idx]->baseline = ymax + padding;
desc->pic_b[pic_idx]->padding = padding;
desc->pic_b[pic_idx]->current_alloc = 0;
desc->pic_b[pic_idx]->current_count = 0;
bbuffer = NULL;
desc->pic_b[pic_idx]->w = width;
desc->pic_b[pic_idx]->h = height;
desc->pic_b[pic_idx]->c = colors;
desc->pic_b[pic_idx]->bmp = bbuffer;
desc->pic_b[pic_idx]->pen = 0;
return 0;
}
// general outline
void outline(
unsigned char *s,
unsigned char *t,
int width,
int height,
int stride,
unsigned char *m,
int r,
int mwidth,
int msize) {
int x, y;
for (y = 0; y<height; y++) {
for (x = 0; x<width; x++) {
const int src= s[x];
if(src==0) continue;
{
const int x1=(x<r) ? r-x : 0;
const int y1=(y<r) ? r-y : 0;
const int x2=(x+r>=width ) ? r+width -x : 2*r+1;
const int y2=(y+r>=height) ? r+height-y : 2*r+1;
register unsigned char *dstp= t + (y1+y-r)* stride + x-r;
//register int *mp = m + y1 *mwidth;
register unsigned char *mp= m + msize*src + y1*mwidth;
int my;
for(my= y1; my<y2; my++){
register int mx;
for(mx= x1; mx<x2; mx++){
if(dstp[mx] < mp[mx]) dstp[mx]= mp[mx];
}
dstp+=stride;
mp+=mwidth;
}
}
}
s+= stride;
}
}
// 1 pixel outline
void outline1(
unsigned char *s,
unsigned char *t,
int width,
int height,
int stride) {
int x, y;
int skip = stride-width;
for (x = 0; x<width; ++x, ++s, ++t) *t = *s;
s += skip;
t += skip;
for (y = 1; y<height-1; ++y) {
*t++ = *s++;
for (x = 1; x<width-1; ++x, ++s, ++t) {
unsigned v = (
s[-1-stride]+
s[-1+stride]+
s[+1-stride]+
s[+1+stride]
)/2 + (
s[-1]+
s[+1]+
s[-stride]+
s[+stride]+
s[0]
);
*t = v>maxcolor ? maxcolor : v;
}
*t++ = *s++;
s += skip;
t += skip;
}
for (x = 0; x<width; ++x, ++s, ++t) *t = *s;
}
// "0 pixel outline"
void outline0(
unsigned char *s,
unsigned char *t,
int width,
int height,
int stride) {
int y;
for (y = 0; y<height; ++y) {
memcpy(t, s, width);
s += stride;
t += stride;
}
}
// gaussian blur
void blur(
unsigned char *buffer,
unsigned short *tmp2,
int width,
int height,
int stride,
int *m2,
int r,
int mwidth) {
int x, y;
unsigned char *s = buffer;
unsigned short *t = tmp2+1;
for(y=0; y<height; y++){
memset(t-1, 0, (width+1)*sizeof(short));
for(x=0; x<r; x++){
const int src= s[x];
if(src){
register unsigned short *dstp= t + x-r;
int mx;
unsigned *m3= m2 + src*mwidth;
for(mx=r-x; mx<mwidth; mx++){
dstp[mx]+= m3[mx];
}
}
}
for(; x<width-r; x++){
const int src= s[x];
if(src){
register unsigned short *dstp= t + x-r;
int mx;
unsigned *m3= m2 + src*mwidth;
for(mx=0; mx<mwidth; mx++){
dstp[mx]+= m3[mx];
}
}
}
for(; x<width; x++){
const int src= s[x];
if(src){
register unsigned short *dstp= t + x-r;
int mx;
const int x2= r+width -x;
unsigned *m3= m2 + src*mwidth;
for(mx=0; mx<x2; mx++){
dstp[mx]+= m3[mx];
}
}
}
s+= stride;
t+= width + 1;
}
t = tmp2;
for(x=0; x<width; x++){
for(y=0; y<r; y++){
unsigned short *srcp= t + y*(width+1) + 1;
int src= *srcp;
if(src){
register unsigned short *dstp= srcp - 1 + width+1;
const int src2= (src + 128)>>8;
unsigned *m3= m2 + src2*mwidth;
int mx;
*srcp= 128;
for(mx=r-1; mx<mwidth; mx++){
*dstp += m3[mx];
dstp+= width+1;
}
}
}
for(; y<height-r; y++){
unsigned short *srcp= t + y*(width+1) + 1;
int src= *srcp;
if(src){
register unsigned short *dstp= srcp - 1 - r*(width+1);
const int src2= (src + 128)>>8;
unsigned *m3= m2 + src2*mwidth;
int mx;
*srcp= 128;
for(mx=0; mx<mwidth; mx++){
*dstp += m3[mx];
dstp+= width+1;
}
}
}
for(; y<height; y++){
unsigned short *srcp= t + y*(width+1) + 1;
int src= *srcp;
if(src){
const int y2=r+height-y;
register unsigned short *dstp= srcp - 1 - r*(width+1);
const int src2= (src + 128)>>8;
unsigned *m3= m2 + src2*mwidth;
int mx;
*srcp= 128;
for(mx=0; mx<y2; mx++){
*dstp += m3[mx];
dstp+= width+1;
}
}
}
t++;
}
t = tmp2;
s = buffer;
for(y=0; y<height; y++){
for(x=0; x<width; x++){
s[x]= t[x]>>8;
}
s+= stride;
t+= width + 1;
}
}
// Gaussian matrix
static unsigned gmatrix(unsigned char *m, int r, int w, double const A) {
unsigned volume = 0; // volume under Gaussian area is exactly -pi*base/A
int mx, my;
for (my = 0; my<w; ++my) {
for (mx = 0; mx<w; ++mx) {
m[mx+my*w] = (exp(A * ((mx-r)*(mx-r)+(my-r)*(my-r))) * base + .5);
volume+= m[mx+my*w];
}
}
mp_msg(MSGT_OSD, MSGL_DBG2, "A= %f\n", A);
mp_msg(MSGT_OSD, MSGL_DBG2, "volume: %i; exact: %.0f; volume/exact: %.6f\n\n", volume, -M_PI*base/A, volume/(-M_PI*base/A));
return volume;
}
static void resample_alpha(unsigned char *abuf, unsigned char *bbuf, int width, int height, int stride, float factor)
{
int f=factor*256.0f;
int i,j;
for (i = 0; i < height; i++) {
unsigned char *a = abuf+i*stride;
unsigned char *b = bbuf+i*stride;
for(j=0;j<width;j++,a++,b++){
int x=*a; // alpha
int y=*b; // bitmap
x=255-((x*f)>>8); // scale
if (x+y>255) x=255-y; // to avoid overflows
if (x<1) x=1; else if (x>=252) x=0;
*a=x;
}
}
}
#define ALLOC_INCR 32
void render_one_glyph(font_desc_t *desc, int c)
{
FT_GlyphSlot slot;
FT_UInt glyph_index;
FT_BitmapGlyph glyph;
int width, height, stride, maxw, off;
unsigned char *abuffer, *bbuffer;
int const load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING;
int pen_xa;
int font = desc->font[c];
int error;
// fprintf(stderr, "render_one_glyph %d\n", c);
if (!desc->dynamic) return;
if (desc->width[c] != -1) return;
if (desc->font[c] == -1) return;
glyph_index = desc->glyph_index[c];
// load glyph
error = FT_Load_Glyph(desc->faces[font], glyph_index, load_flags);
if (error) {
WARNING("FT_Load_Glyph 0x%02x (char 0x%04x) failed.", glyph_index, c);
desc->font[c] = -1;
return;
}
slot = desc->faces[font]->glyph;
// render glyph
if (slot->format != ft_glyph_format_bitmap) {
error = FT_Render_Glyph(slot, ft_render_mode_normal);
if (error) {
WARNING("FT_Render_Glyph 0x%04x (char 0x%04x) failed.", glyph_index, c);
desc->font[c] = -1;
return;
}
}
// extract glyph image
error = FT_Get_Glyph(slot, (FT_Glyph*)&glyph);
if (error) {
WARNING("FT_Get_Glyph 0x%04x (char 0x%04x) failed.", glyph_index, c);
desc->font[c] = -1;
return;
}
// fprintf(stderr, "glyph generated\n");
maxw = desc->pic_b[font]->charwidth;
if (glyph->bitmap.width > maxw) {
fprintf(stderr, "glyph too wide!\n");
}
// allocate new memory, if needed
// fprintf(stderr, "\n%d %d %d\n", desc->pic_b[font]->charwidth, desc->pic_b[font]->charheight, desc->pic_b[font]->current_alloc);
if (desc->pic_b[font]->current_count >= desc->pic_b[font]->current_alloc) {
int newsize = desc->pic_b[font]->charwidth*desc->pic_b[font]->charheight*(desc->pic_b[font]->current_alloc+ALLOC_INCR);
int increment = desc->pic_b[font]->charwidth*desc->pic_b[font]->charheight*ALLOC_INCR;
desc->pic_b[font]->current_alloc += ALLOC_INCR;
// fprintf(stderr, "\nns = %d inc = %d\n", newsize, increment);
desc->pic_b[font]->bmp = realloc(desc->pic_b[font]->bmp, newsize);
desc->pic_a[font]->bmp = realloc(desc->pic_a[font]->bmp, newsize);
off = desc->pic_b[font]->current_count*desc->pic_b[font]->charwidth*desc->pic_b[font]->charheight;
memset(desc->pic_b[font]->bmp+off, 0, increment);
memset(desc->pic_a[font]->bmp+off, 0, increment);
}
abuffer = desc->pic_a[font]->bmp;
bbuffer = desc->pic_b[font]->bmp;
off = desc->pic_b[font]->current_count*desc->pic_b[font]->charwidth*desc->pic_b[font]->charheight;
paste_bitmap(bbuffer+off,
&glyph->bitmap,
desc->pic_b[font]->padding + glyph->left,
desc->pic_b[font]->baseline - glyph->top,
desc->pic_b[font]->charwidth, desc->pic_b[font]->charheight,
glyph->bitmap.width <= maxw ? glyph->bitmap.width : maxw);
// fprintf(stderr, "glyph pasted\n");
FT_Done_Glyph((FT_Glyph)glyph);
/* advance pen */
pen_xa = f266ToInt(slot->advance.x) + 2*desc->pic_b[font]->padding;
if (pen_xa > maxw) pen_xa = maxw;
desc->start[c] = off;
width = desc->width[c] = pen_xa;
height = desc->pic_b[font]->charheight;
stride = desc->pic_b[font]->w;
if (desc->tables.o_r == 0) {
outline0(bbuffer+off, abuffer+off, width, height, stride);
} else if (desc->tables.o_r == 1) {
outline1(bbuffer+off, abuffer+off, width, height, stride);
} else {
outline(bbuffer+off, abuffer+off, width, height, stride,
desc->tables.omt, desc->tables.o_r, desc->tables.o_w,
desc->tables.o_size);
}
// fprintf(stderr, "fg: outline t = %lf\n", GetTimer()-t);
if (desc->tables.g_r) {
blur(abuffer+off, desc->tables.tmp, width, height, stride,
desc->tables.gt2, desc->tables.g_r,
desc->tables.g_w);
// fprintf(stderr, "fg: blur t = %lf\n", GetTimer()-t);
}
resample_alpha(abuffer+off, bbuffer+off, width, height, stride, font_factor);
desc->pic_b[font]->current_count++;
}
static int prepare_font(font_desc_t *desc, FT_Face face, float ppem, int pic_idx,
int charset_size, FT_ULong *charset, FT_ULong *charcodes, int unicode,
double thickness, double radius)
{
int i, err;
int padding = ceil(radius) + ceil(thickness);
desc->faces[pic_idx] = face;
desc->pic_a[pic_idx] = (raw_file*)malloc(sizeof(raw_file));
if (!desc->pic_a[pic_idx]) return -1;
desc->pic_b[pic_idx] = (raw_file*)malloc(sizeof(raw_file));
if (!desc->pic_b[pic_idx]) return -1;
desc->pic_a[pic_idx]->bmp = NULL;
desc->pic_a[pic_idx]->pal = NULL;
desc->pic_b[pic_idx]->bmp = NULL;
desc->pic_b[pic_idx]->pal = NULL;
desc->pic_a[pic_idx]->pal = (unsigned char*)malloc(sizeof(unsigned char)*256*3);
if (!desc->pic_a[pic_idx]->pal) return -1;
for (i = 0; i<768; ++i) desc->pic_a[pic_idx]->pal[i] = i/3;
desc->pic_b[pic_idx]->pal = (unsigned char*)malloc(sizeof(unsigned char)*256*3);
if (!desc->pic_b[pic_idx]->pal) return -1;
for (i = 0; i<768; ++i) desc->pic_b[pic_idx]->pal[i] = i/3;
// ttime = GetTimer();
err = check_font(desc, ppem, padding, pic_idx, charset_size, charset, charcodes, unicode);
// ttime=GetTimer()-ttime;
// printf("render: %7lf us\n",ttime);
if (err) return -1;
// fprintf(stderr, "fg: render t = %lf\n", GetTimer()-t);
desc->pic_a[pic_idx]->w = desc->pic_b[pic_idx]->w;
desc->pic_a[pic_idx]->h = desc->pic_b[pic_idx]->h;
desc->pic_a[pic_idx]->c = colors;
desc->pic_a[pic_idx]->bmp = NULL;
// fprintf(stderr, "fg: w = %d, h = %d\n", desc->pic_a[pic_idx]->w, desc->pic_a[pic_idx]->h);
return 0;
}
int generate_tables(font_desc_t *desc, double thickness, double radius)
{
int width = desc->max_height;
int height = desc->max_width;
double A = log(1.0/base)/(radius*radius*2);
int mx, my, i;
double volume_diff, volume_factor = 0;
unsigned char *omtp;
desc->tables.g_r = ceil(radius);
desc->tables.o_r = ceil(thickness);
desc->tables.g_w = 2*desc->tables.g_r+1;
desc->tables.o_w = 2*desc->tables.o_r+1;
desc->tables.o_size = desc->tables.o_w * desc->tables.o_w;
// fprintf(stderr, "o_r = %d\n", desc->tables.o_r);
if (desc->tables.g_r) {
desc->tables.g = (unsigned*)malloc(desc->tables.g_w * sizeof(unsigned));
desc->tables.gt2 = (unsigned*)malloc(256 * desc->tables.g_w * sizeof(unsigned));
if (desc->tables.g==NULL || desc->tables.gt2==NULL) {
return -1;
}
}
desc->tables.om = (unsigned*)malloc(desc->tables.o_w*desc->tables.o_w * sizeof(unsigned));
desc->tables.omt = malloc(desc->tables.o_size*256);
omtp = desc->tables.omt;
desc->tables.tmp = malloc((width+1)*height*sizeof(short));
if (desc->tables.om==NULL || desc->tables.omt==NULL || desc->tables.tmp==NULL) {
return -1;
};
if (desc->tables.g_r) {
// gaussian curve with volume = 256
for (volume_diff=10000000; volume_diff>0.0000001; volume_diff*=0.5){
volume_factor+= volume_diff;
desc->tables.volume=0;
for (i = 0; i<desc->tables.g_w; ++i) {
desc->tables.g[i] = (unsigned)(exp(A * (i-desc->tables.g_r)*(i-desc->tables.g_r)) * volume_factor + .5);
desc->tables.volume+= desc->tables.g[i];
}
if(desc->tables.volume>256) volume_factor-= volume_diff;
}
desc->tables.volume=0;
for (i = 0; i<desc->tables.g_w; ++i) {
desc->tables.g[i] = (unsigned)(exp(A * (i-desc->tables.g_r)*(i-desc->tables.g_r)) * volume_factor + .5);
desc->tables.volume+= desc->tables.g[i];
}
// gauss table:
for(mx=0;mx<desc->tables.g_w;mx++){
for(i=0;i<256;i++){
desc->tables.gt2[mx+i*desc->tables.g_w] = i*desc->tables.g[mx];
}
}
}
/* outline matrix */
for (my = 0; my<desc->tables.o_w; ++my) {
for (mx = 0; mx<desc->tables.o_w; ++mx) {
// antialiased circle would be perfect here, but this one is good enough
double d = thickness + 1 - sqrt((mx-desc->tables.o_r)*(mx-desc->tables.o_r)+(my-desc->tables.o_r)*(my-desc->tables.o_r));
desc->tables.om[mx+my*desc->tables.o_w] = d>=1 ? base : d<=0 ? 0 : (d*base + .5);
}
}
// outline table:
for(i=0;i<256;i++){
for(mx=0;mx<desc->tables.o_size;mx++) *(omtp++) = (i*desc->tables.om[mx] + (base/2))/base;
}
return 0;
}
/* decode from 'encoding' to unicode */
static FT_ULong decode_char(iconv_t *cd, char c) {
FT_ULong o;
char *inbuf = &c;
char *outbuf = (char*)&o;
int inbytesleft = 1;
int outbytesleft = sizeof(FT_ULong);
iconv(*cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
/* convert unicode BigEndian -> MachineEndian */
o = be2me_32(o);
// if (count==-1) o = 0; // not OK, at least my iconv() returns E2BIG for all
if (outbytesleft!=0) o = 0;
/* we don't want control characters */
if (o>=0x7f && o<0xa0) o = 0;
return o;
}
static int prepare_charset(char *charmap, char *encoding, FT_ULong *charset, FT_ULong *charcodes) {
FT_ULong i;
int count = 0;
int charset_size;
iconv_t cd;
// check if ucs-4 is available
cd = iconv_open(charmap, charmap);
if (cd==(iconv_t)-1) {
mp_msg(MSGT_OSD, MSGL_ERR, "iconv doesn't know %s encoding. Use the source!\n", charmap);
return -1;
}
iconv_close(cd);
cd = iconv_open(charmap, encoding);
if (cd==(iconv_t)-1) {
mp_msg(MSGT_OSD, MSGL_ERR, "Unsupported encoding `%s', use iconv --list to list character sets known on your system.\n", encoding);
return -1;
}
charset_size = 256 - first_char;
for (i = 0; i<charset_size; ++i) {
charcodes[count] = i+first_char;
charset[count] = decode_char(&cd, i+first_char);
if (charset[count]!=0) ++count;
}
charcodes[count] = charset[count] = 0; ++count;
charset_size = count;
iconv_close(cd);
if (charset_size==0) {
mp_msg(MSGT_OSD, MSGL_ERR, "No characters to render!\n");
return -1;
}
return charset_size;
}
static int prepare_charset_unicode(FT_Face face, FT_ULong *charset, FT_ULong *charcodes) {
#ifdef HAVE_FREETYPE21
FT_ULong charcode;
#endif
FT_UInt gindex;
int i,j;
if (face->charmap==NULL || face->charmap->encoding!=ft_encoding_unicode) {
WARNING("Unicode charmap not available for this font. Very bad!");
return -1;
}
#ifdef HAVE_FREETYPE21
i = 0;
charcode = FT_Get_First_Char( face, &gindex );
while (gindex != 0) {
if (charcode < 65536 && charcode >= 33) { // sanity check
charset[i] = charcode;
charcodes[i] = 0;
i++;
}
charcode = FT_Get_Next_Char( face, charcode, &gindex );
}
#else
// for FT < 2.1 we have to use brute force enumeration
i = 0;
for (j = 33; j < 65536; j++) {
gindex = FT_Get_Char_Index(face, j);
if (gindex > 0) {
charset[i] = j;
charcodes[i] = 0;
i++;
}
}
#endif
mp_msg(MSGT_OSD, MSGL_V, "Unicode font: %d glyphs.\n", i);
return i;
}
static font_desc_t* init_font_desc()
{
font_desc_t *desc;
int i;
desc = malloc(sizeof(font_desc_t));
if(!desc) return NULL;
memset(desc,0,sizeof(font_desc_t));
desc->dynamic = 1;
/* setup sane defaults */
desc->name = NULL;
desc->fpath = NULL;
desc->face_cnt = 0;
desc->charspace = 0;
desc->spacewidth = 0;
desc->height = 0;
desc->max_width = 0;
desc->max_height = 0;
desc->tables.g = NULL;
desc->tables.gt2 = NULL;
desc->tables.om = NULL;
desc->tables.omt = NULL;
desc->tables.tmp = NULL;
for(i = 0; i < 65536; i++)
desc->start[i] = desc->width[i] = desc->font[i] = -1;
for(i = 0; i < 16; i++)
desc->pic_a[i] = desc->pic_b[i] = NULL;
return desc;
}
void free_font_desc(font_desc_t *desc)
{
int i;
if (!desc) return;
if (desc->name) free(desc->name);
if (desc->fpath) free(desc->fpath);
for(i = 0; i < 16; i++) {
if (desc->pic_a[i]) {
if (desc->pic_a[i]->bmp) free(desc->pic_a[i]->bmp);
if (desc->pic_a[i]->pal) free(desc->pic_a[i]->pal);
}
if (desc->pic_b[i]) {
if (desc->pic_b[i]->bmp) free(desc->pic_b[i]->bmp);
if (desc->pic_b[i]->pal) free(desc->pic_b[i]->pal);
}
}
if (desc->tables.g) free(desc->tables.g);
if (desc->tables.gt2) free(desc->tables.gt2);
if (desc->tables.om) free(desc->tables.om);
if (desc->tables.omt) free(desc->tables.omt);
if (desc->tables.tmp) free(desc->tables.tmp);
for(i = 0; i < desc->face_cnt; i++) {
FT_Done_Face(desc->faces[i]);
}
free(desc);
}
static int load_sub_face(char *name, FT_Face *face)
{
int err = -1;
if (name) err = FT_New_Face(library, name, 0, face);
if (err) {
err = FT_New_Face(library, get_path("subfont.ttf"), 0, face);
if (err) {
err = FT_New_Face(library, DATADIR"/subfont.ttf", 0, face);
if (err) {
mp_msg(MSGT_OSD, MSGL_ERR, "New_Face failed. Maybe the font path is wrong.\nPlease supply the text font file (~/.mplayer/subfont.ttf).\n" );
return -1;
}
}
}
return err;
}
static int load_osd_face(FT_Face *face)
{
if ( FT_New_Memory_Face(library, osd_font_pfb, sizeof(osd_font_pfb), 0, face) ) {
mp_msg(MSGT_OSD, MSGL_ERR, "New_Memory_Face failed..\n");
return -1;
}
return 0;
}
int kerning(font_desc_t *desc, int prevc, int c)
{
FT_Vector kern;
if (!vo_font->dynamic) return 0;
if (prevc < 0 || c < 0) return 0;
if (desc->font[prevc] != desc->font[c]) return 0;
if (desc->font[prevc] == -1 || desc->font[c] == -1) return 0;
FT_Get_Kerning(desc->faces[desc->font[c]],
desc->glyph_index[prevc], desc->glyph_index[c],
ft_kerning_default, &kern);
// fprintf(stderr, "kern: %c %c %d\n", prevc, c, f266ToInt(kern.x));
return f266ToInt(kern.x);
}
font_desc_t* read_font_desc_ft(char *fname, int movie_width, int movie_height)
{
font_desc_t *desc;
FT_Face face;
FT_ULong my_charset[MAX_CHARSET_SIZE]; /* characters we want to render; Unicode */
FT_ULong my_charcodes[MAX_CHARSET_SIZE]; /* character codes in 'encoding' */
char *charmap = "ucs-4";
int err;
int charset_size;
int i, j;
int unicode;
float movie_size;
float subtitle_font_ppem;
float osd_font_ppem;
switch (subtitle_autoscale) {
case 1:
movie_size = movie_height;
break;
case 2:
movie_size = movie_width;
break;
case 3:
movie_size = sqrt(movie_height*movie_height+movie_width*movie_width);
break;
default:
movie_size = 100;
break;
}
subtitle_font_ppem = movie_size*text_font_scale_factor/100.0;
osd_font_ppem = movie_size*osd_font_scale_factor/100.0;
if (subtitle_font_ppem < 5) subtitle_font_ppem = 5;
if (osd_font_ppem < 5) osd_font_ppem = 5;
if (subtitle_font_ppem > 128) subtitle_font_ppem = 128;
if (osd_font_ppem > 128) osd_font_ppem = 128;
if ((subtitle_font_encoding == NULL)
|| (strcasecmp(subtitle_font_encoding, "unicode") == 0)) {
unicode = 1;
} else {
unicode = 0;
}
desc = init_font_desc();
if(!desc) return NULL;
// t=GetTimer();
/* generate the subtitle font */
err = load_sub_face(fname, &face);
if (err) {
mp_msg(MSGT_OSD, MSGL_WARN, "subtitle font: load_sub_face failed.\n");
goto gen_osd;
}
desc->face_cnt++;
if (unicode) {
charset_size = prepare_charset_unicode(face, my_charset, my_charcodes);
} else {
if (subtitle_font_encoding) {
charset_size = prepare_charset(charmap, subtitle_font_encoding, my_charset, my_charcodes);
} else {
charset_size = prepare_charset(charmap, "iso-8859-1", my_charset, my_charcodes);
}
}
if (charset_size < 0) {
mp_msg(MSGT_OSD, MSGL_ERR, "subtitle font: prepare_charset failed.\n");
free_font_desc(desc);
return NULL;
}
// fprintf(stderr, "fg: prepare t = %lf\n", GetTimer()-t);
err = prepare_font(desc, face, subtitle_font_ppem, desc->face_cnt-1,
charset_size, my_charset, my_charcodes, unicode,
subtitle_font_thickness, subtitle_font_radius);
if (err) {
mp_msg(MSGT_OSD, MSGL_ERR, "Cannot prepare subtitle font.\n");
free_font_desc(desc);
return NULL;
}
gen_osd:
/* generate the OSD font */
err = load_osd_face(&face);
if (err) {
free_font_desc(desc);
return NULL;
}
desc->face_cnt++;
err = prepare_font(desc, face, osd_font_ppem, desc->face_cnt-1,
OSD_CHARSET_SIZE, osd_charset, osd_charcodes, 0,
subtitle_font_thickness, subtitle_font_radius);
if (err) {
mp_msg(MSGT_OSD, MSGL_ERR, "Cannot prepare OSD font.\n");
free_font_desc(desc);
return NULL;
}
err = generate_tables(desc, subtitle_font_thickness, subtitle_font_radius);
if (err) {
mp_msg(MSGT_OSD, MSGL_ERR, "Cannot generate tables.\n");
free_font_desc(desc);
return NULL;
}
// final cleanup
desc->font[' ']=-1;
desc->width[' ']=desc->spacewidth;
j = '_';
if (desc->font[j] < 0) j = '?';
if (desc->font[j] < 0) j = ' ';
render_one_glyph(desc, j);
for(i = 0; i < 65536; i++) {
if (desc->font[i] < 0 && i != ' ') {
desc->start[i] = desc->start[j];
desc->width[i] = desc->width[j];
desc->font[i] = desc->font[j];
}
}
return desc;
}
int init_freetype()
{
int err;
/* initialize freetype */
err = FT_Init_FreeType(&library);
if (err) {
mp_msg(MSGT_OSD, MSGL_ERR, "Init_FreeType failed.\n");
return -1;
}
fprintf(stderr, "init_freetype\n");
using_freetype = 1;
return 0;
}
int done_freetype()
{
int err;
if (!using_freetype)
return 0;
err = FT_Done_FreeType(library);
if (err) {
mp_msg(MSGT_OSD, MSGL_ERR, "FT_Done_FreeType failed.\n");
return -1;
}
return 0;
}
void load_font_ft(int width, int height)
{
vo_image_width = width;
vo_image_height = height;
// protection against vo_aa font hacks
if (vo_font && !vo_font->dynamic) return;
if (vo_font) free_font_desc(vo_font);
#ifdef USE_OSD
vo_font=read_font_desc_ft(font_name, width, height);
#endif
}
#endif /* HAVE_FREETYPE */
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