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/*
* Copyright (C) 2001-2003 the xine project
*
* This file is part of xine, a free video player.
*
* xine 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.
*
* xine 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* OSD stuff (text and graphic primitives)
*
* xine-fontconv.c
*
* converts ttf fonts to xine osd fonts
*
* compile:
* gcc -o xine-fontconv xine-fontconv.c `freetype-config --cflags --libs` -lz
*
* usage:
* xine-fontconv font.ttf fontname [encoding1 [encoding2 [...]]]
*
* begin : Sat Dec 1 2001
* copyright : (C) 2001 by Miguel Freitas
* unicode stuff : (C) 2003 by Frantisek Dvorak
*/
#include <sys/param.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <malloc.h>
#include <zlib.h>
#include <iconv.h>
#ifndef OLD_FREETYPE2
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#else /* freetype 2.0.1 */
#include <freetype/freetype.h>
#include <freetype/ftglyph.h>
#endif
/* we want UCS-2 encoding in the machine endian */
#if BYTE_ORDER == BIG_ENDIAN
# define UCS2_ENCODING "UCS-2BE"
#else
# define UCS2_ENCODING "UCS-2LE"
#endif
#ifndef MAX
# define MAX (a, b) ((a) > (b)? (a) : (b))
#endif
#define f266ToInt(x) (((x)+32)>>6) /* round fractional fixed point */
/* 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 LOG 1
*/
/* xine stuff */
typedef struct osd_fontchar_s osd_fontchar_t;
typedef struct osd_font_s osd_font_t;
typedef unsigned short uint16_t;
typedef unsigned char uint8_t;
struct osd_fontchar_s {
uint16_t code;
uint16_t width;
uint16_t height;
uint8_t *bmp;
};
struct osd_font_s {
char name[40];
uint16_t version;
uint16_t size;
uint16_t num_fontchars;
osd_fontchar_t *fontchar;
osd_font_t *next;
};
/* list */
typedef struct item_s item_t;
struct item_s {
uint16_t code;
item_t *next;
};
osd_fontchar_t fontchar;
osd_font_t font;
static int gzwrite_i16(gzFile fp, uint16_t number) {
return gzputc(fp, number & 0xFF) != -1 &&
gzputc(fp, (number >> 8) & 0xFF) != -1;
}
/* search the item with 'code' in the sorted list */
item_t *list_search(item_t *list, uint16_t code, item_t **parent) {
item_t *item;
/* searching */
item = list;
while(item && item->code < code) {
list = item;
item = item->next;
}
/* parent (or future parent) */
if (parent) *parent = list == item ? NULL : list;
if (item && item->code == code) return item;
else return NULL;
}
/* add new number into sorted list, returns if code is there already */
int list_insert(item_t **list, uint16_t code) {
item_t *item, *parent;
if ((item = list_search(*list, code, &parent)) == NULL) {
/* insert new item */
if ((item = malloc(sizeof(item_t))) == NULL) {
printf("Insufficient memory\n");
abort();
}
item->code = code;
if (parent) {
item->next = parent->next;
parent->next = item;
} else {
item->next = *list;
*list = item;
}
return 0;
} else {
/* item is there already */
return 1;
}
}
/* free the list */
void list_free(item_t *list) {
item_t *item;
while(list != NULL) {
item = list;
list = list->next;
free(item);
}
}
/*
* generate sorted list with unicodes in all given pages,
* returns number of unicodes in the list
*/
uint16_t generate_unicodes_list(item_t **list, char **pages, int number) {
int page;
uint16_t codes_count = 0; /* unicode counter */
int32_t z; /* index in the codepage */
iconv_t cd; /* iconv conversion descriptor */
*list = NULL;
/* process all given codepages */
for (page = 0; page < number; page++) {
/* prepare encoding */
if ((cd = iconv_open(UCS2_ENCODING, pages[page])) == (iconv_t)-1) {
printf("Unsupported encoding \"%s\"\n", pages[page]);
continue;
}
printf("Used encoding \"%s\"\n", pages[page]);
/* add new unicodes into list */
for (z = 32; z < 0xFFFF; z++) {
uint16_t unicode;
char *inbuf = (char *)&z;
char *outbuf = (char *)&unicode;
size_t inbytesleft = z <= 0xFF ? 1 : 2;
size_t outbytesleft = 2;
size_t count;
/* get unicode value from index 'z' in this codepage 'pages[i]' */
count = iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
if (count == (size_t)-1 || inbytesleft != 0) {
/* unused index 'z' in this codepage */
continue;
}
if (!list_insert(list, unicode)) codes_count++;
}
iconv_close(cd);
}
return codes_count;
}
#ifdef LOG
void print_bitmap (FT_Bitmap *bitmap) {
int x,y;
for( y = 0; y < bitmap->rows; y++ ) {
for( x = 0; x < bitmap->width; x++ ) {
if( bitmap->buffer[y*bitmap->width+x] > 1 )
printf("%02x ", bitmap->buffer[y*bitmap->width+x] );
else
printf(" ");
}
printf("\n");
}
}
#endif
FT_Bitmap *create_bitmap (int width, int height) {
FT_Bitmap * bitmap;
#ifdef LOG
printf("Bitmap char %d %d\n",width,height);
#endif
bitmap = malloc( sizeof( FT_Bitmap ) );
bitmap->rows = height;
bitmap->width = width;
bitmap->buffer = malloc(width*height);
memset( bitmap->buffer, 0, width*height );
return bitmap;
}
void destroy_bitmap (FT_Bitmap * bitmap) {
free(bitmap->buffer);
free(bitmap);
}
/*
This function is called to blend a slightly deslocated
version of the bitmap. This will produce the border effect.
Note that the displacement may be smaller than 1 pixel
as the bitmap is generated in freetype 1/64 units.
This border is antialiased to the background.
*/
void add_border_bitmap( FT_Bitmap *dst, FT_Bitmap *src, int left, int top )
{
int x,y;
int x1, y1;
int dstpos, srcpos;
for( y = 0; y < src->rows; y++ ) {
for( x = 0; x < src->width; x++ ) {
srcpos = y * src->width + x;
x1 = x + left;
if( x1 < 0 || x1 >= dst->width )
continue;
y1 = y + top;
if( y1 < 0 || y1 >= dst->rows )
continue;
dstpos = y1 * dst->width + x1;
src->buffer[srcpos] /= 51;
if( src->buffer[srcpos] > dst->buffer[dstpos] )
dst->buffer[dstpos] = src->buffer[srcpos];
}
}
}
/*
Blend the final version of bitmap (the foreground color) over the
already generated border. It will be antialiased to the border.
Final palette will be:
0: not used by font, always transparent
1: font background, usually transparent, may be used to implement
translucid boxes where the font will be printed.
2-5: transition between background and border (usually only alpha
value changes).
6: font border. if the font is to be displayed without border this
will probably be adjusted to font background or near.
7-9: transition between border and foreground
10: font color (foreground)
*/
void add_final_bitmap( FT_Bitmap *dst, FT_Bitmap *src, int left, int top )
{
int x,y;
int x1, y1;
int dstpos, srcpos;
for( y = 0; y < src->rows; y++ ) {
for( x = 0; x < src->width; x++ ) {
srcpos = y * src->width + x;
x1 = x + left;
if( x1 < 0 || x1 >= dst->width )
continue;
y1 = y + top;
if( y1 < 0 || y1 >= dst->rows )
continue;
dstpos = y1 * dst->width + x1;
src->buffer[srcpos] /= 52;
if( src->buffer[srcpos] )
dst->buffer[dstpos] = src->buffer[srcpos] + 5;
}
}
for( y = 0; y < dst->rows; y++ ) {
for( x = 0; x < dst->width; x++ ) {
dstpos = y * dst->width + x;
dst->buffer[dstpos]++;
}
}
}
void render_font (FT_Face face, char *fontname, int size, int thickness,
item_t *unicodes) {
char filename[1024];
FT_Bitmap *out_bitmap;
gzFile fp;
int error;
int error_counter;
int glyph_index;
FT_Glyph glyph;
FT_BitmapGlyph glyph_bitmap;
FT_Vector origin;
int max_bearing_y = 0;
int i;
int converted;
item_t *item, *error_unicodes;
static int border_pos[9][2] = {
{-1,0},{1,0},{0,-1},{0,1},
{-1,-1},{1,-1},{-1,1},{1,1}, {0,0}
};
/*
* generate filename, open file
*/
snprintf (filename, sizeof(filename), "%s-%d.xinefont.gz", fontname, size);
fp = gzopen(filename,"w");
if (!fp) {
printf ("error opening output file %s\n", filename);
return;
}
/*
* set up font
*/
strncpy(font.name, fontname, sizeof(font.name));
font.name[sizeof(font.name) - 1] = '\0';
/* changes from version 1 to version 2:
* 'code' in characters is defined as little endian 16-bit unicode
* characters are sorted by 'code'
*/
font.version = 2;
font.num_fontchars = 0;
font.size = size;
error = FT_Set_Pixel_Sizes( face, /* handle to face object */
0, /* pixel_width */
size ); /* pixel_height */
if (error) {
printf("error setting size\n");
return;
}
if( !thickness )
thickness = size * 64 / 30;
/*
* calc max bearing y.
* this is needed to align all bitmaps by the upper position.
*/
error_counter = 0;
error_unicodes = NULL;
for (item = unicodes; item; item = item->next) {
glyph_index = FT_Get_Char_Index( face, item->code);
if (!glyph_index) {
error_counter++;
list_insert(&error_unicodes, item->code);
continue;
}
error = FT_Load_Glyph (face, /* handle to face object */
glyph_index, /* glyph index */
FT_LOAD_DEFAULT ); /* load flags */
if (error) {
error_counter++;
list_insert(&error_unicodes, item->code);
continue;
}
#ifdef LOG
printf("bearing_y %ld\n",face->glyph->metrics.horiBearingY);
#endif
if( (face->glyph->metrics.horiBearingY >> 6) > max_bearing_y )
max_bearing_y = (face->glyph->metrics.horiBearingY >> 6);
font.num_fontchars++;
}
printf("max_bearing_y: %d\n", max_bearing_y + f266CeilToInt(thickness));
gzwrite(fp, font.name, sizeof(font.name));
gzwrite_i16(fp, font.version);
gzwrite_i16(fp, font.size);
gzwrite_i16(fp, font.num_fontchars);
for (item = unicodes; item; item = item->next) {
converted = 0;
for( i=0; i < 9; i++ ) {
glyph_index = FT_Get_Char_Index( face, item->code);
if (glyph_index) {
error = FT_Load_Glyph( face, /* handle to face object */
glyph_index, /* glyph index */
FT_LOAD_DEFAULT ); /* load flags */
if (!error) {
error = FT_Get_Glyph( face->glyph, &glyph );
if( i == 0 ) {
out_bitmap = create_bitmap( f266CeilToInt(thickness + MAX(face->glyph->metrics.horiAdvance, face->glyph->metrics.width + face->glyph->metrics.horiBearingX)),
f266CeilToInt((max_bearing_y<<6) - face->glyph->metrics.horiBearingY +
face->glyph->metrics.height + thickness) );
}
origin.x = thickness + border_pos[i][0]*thickness;
origin.y = thickness + border_pos[i][1]*thickness;
error = FT_Glyph_Transform(glyph, NULL, &origin) ||
FT_Glyph_To_Bitmap( &glyph, ft_render_mode_normal, NULL, 1);
if (error) {
printf("error generating bitmap [U+%04X]\n", item->code);
destroy_bitmap(out_bitmap);
return;
}
glyph_bitmap = (FT_BitmapGlyph)glyph;
if( i < 8 )
add_border_bitmap( out_bitmap, &glyph_bitmap->bitmap, glyph_bitmap->left,
max_bearing_y - glyph_bitmap->top );
else
add_final_bitmap( out_bitmap, &glyph_bitmap->bitmap, glyph_bitmap->left,
max_bearing_y - glyph_bitmap->top );
converted = 1;
FT_Done_Glyph( glyph );
}
}
}
if( converted ) {
#ifdef LOG
printf("[U+%04X] bitmap width: %d height: %d\n", item->code, out_bitmap->width, out_bitmap->rows );
/*
print_bitmap(out_bitmap);
*/
#endif
fontchar.code = item->code;
fontchar.width = out_bitmap->width;
fontchar.height = out_bitmap->rows;
gzwrite_i16 (fp, fontchar.code);
gzwrite_i16 (fp, fontchar.width);
gzwrite_i16 (fp, fontchar.height);
gzwrite (fp, out_bitmap->buffer, out_bitmap->width*out_bitmap->rows);
destroy_bitmap(out_bitmap);
}
}
gzclose(fp);
if (error_counter) {
printf("error: %d characters couldn't read: ", error_counter);
/* this unicodes wasn't readed from .ttf font */
item = error_unicodes;
while(item) {
printf("U+%04X ", item->code);
item = item->next;
}
printf("\n");
list_free(error_unicodes);
}
printf ("generated %s (%d characters)\n", filename, font.num_fontchars);
}
int main(int argc, char *argv[]) {
int error;
int len;
FT_Library library;
FT_Face face;
int thickness = 0;
char *encoding = "iso-8859-1";
item_t *unicodes = NULL; /* unicode list */
#ifdef LOG
item_t *item;
#endif
uint16_t count;
/*
* command line parsing
*/
if (argc < 3) {
printf ("usage: %s font.ttf fontname [encoding1 [encoding2 [...]]]\n", argv[0]);
exit (1);
}
len = strlen (argv[1]);
if (strncasecmp (&argv[1][len-4],".ttf",3)) {
printf ("font name must have .ttf suffix (is %s)\n", &argv[1][len-4]);
exit (1);
}
error = FT_Init_FreeType( &library );
if( error ) {
printf("error initializing freetype\n");
return 1;
}
error = FT_New_Face( library,
argv[1],
0,
&face );
if (error) {
printf("error loading font\n");
return 1;
}
error = FT_Select_Charmap( face, ft_encoding_unicode);
if (error) {
printf("error selecting unicode charmap\n");
return 1;
}
if (argc == 3) {
count = generate_unicodes_list(&unicodes, &encoding, 1);
} else {
count = generate_unicodes_list(&unicodes, argv + 3, argc - 3);
}
#ifdef LOG
printf("Prepared %d unicode values: ", count);
for (item = unicodes; item; item = item->next) printf("U+%04X ", item->code);
printf("\n");
#else
printf("Prepared %d unicode values.\n", count);
#endif
if (count) {
render_font (face, argv[2], 16, thickness, unicodes);
render_font (face, argv[2], 20, thickness, unicodes);
render_font (face, argv[2], 24, thickness, unicodes);
render_font (face, argv[2], 32, thickness, unicodes);
render_font (face, argv[2], 48, thickness, unicodes);
render_font (face, argv[2], 64, thickness, unicodes);
} else
printf("No font generated\n");
list_free(unicodes);
FT_Done_Face(face);
FT_Done_FreeType(library);
/*
* some rgb -> yuv conversion,
* can be used to calc new palettes
*/
/*
{
float f;
for (f=1.0; f<6.0; f+=1.0) {
float R=f*40.0;
float G=f*40.0;
float B=f*42.0;
float Y, Cb, Cr;
Y = 0.29900 * R + 0.58700 * G + 0.11400 * B ;
Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B + 128.0;
Cr = 0.50000 * R - 0.41869 * G - 0.08131 * B + 128.0;
printf ("CLUT_Y_CR_CB_INIT(0x%x, 0x%x, 0x%x),\n", (int) Y, (int) Cr, (int) Cb);
}
}
*/
return 0;
}