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// -*- c-basic-offset: 8; indent-tabs-mode: t -*-
// vim:ts=8:sw=8:noet:ai:
/*
Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <inttypes.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_SYNTHESIS_H
#include FT_GLYPH_H
#include "ass_font.h"
#include "ass_bitmap.h"
#include "ass_cache.h"
#include "ass_fontconfig.h"
#include "mputils.h"
/**
* Select Microfost Unicode CharMap, if the font has one.
* Otherwise, let FreeType decide.
*/
static void charmap_magic(FT_Face face)
{
int i;
for (i = 0; i < face->num_charmaps; ++i) {
FT_CharMap cmap = face->charmaps[i];
unsigned pid = cmap->platform_id;
unsigned eid = cmap->encoding_id;
if (pid == 3 /*microsoft*/ && (eid == 1 /*unicode bmp*/ || eid == 10 /*full unicode*/)) {
FT_Set_Charmap(face, cmap);
break;
}
}
}
ass_font_t* ass_font_new(FT_Library ftlibrary, void* fc_priv, ass_font_desc_t* desc)
{
char* path;
int index;
FT_Face face;
int error;
ass_font_t* font;
font = ass_font_cache_find(desc);
if (font)
return font;
path = fontconfig_select(fc_priv, desc->family, desc->bold, desc->italic, &index);
error = FT_New_Face(ftlibrary, path, index, &face);
if (error) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorOpeningFont, path, index);
return 0;
}
charmap_magic(face);
font = calloc(1, sizeof(ass_font_t));
font->ftlibrary = ftlibrary;
font->path = strdup(path);
font->index = index;
font->face = face;
font->desc.family = strdup(desc->family);
font->desc.bold = desc->bold;
font->desc.italic = desc->italic;
font->m.xx = font->m.yy = (FT_Fixed)0x10000L;
font->m.xy = font->m.yy = 0;
font->v.x = font->v.y = 0;
font->size = 0;
#ifdef HAVE_FONTCONFIG
font->charset = FcCharSetCreate();
#endif
ass_font_cache_add(font);
return font;
}
void ass_font_set_transform(ass_font_t* font, FT_Matrix* m, FT_Vector* v)
{
if (font->m.xx != m->xx ||
font->m.xy != m->xy ||
font->m.yx != m->yx ||
font->m.yy != m->yy ||
font->v.x != v->x ||
font->v.y != v->y
) {
font->m.xx = m->xx;
font->m.xy = m->xy;
font->m.yx = m->yx;
font->m.yy = m->yy;
font->v.x = v->x;
font->v.y = v->y;
FT_Set_Transform(font->face, &font->m, &font->v);
}
}
void ass_font_set_size(ass_font_t* font, int size)
{
if (font->size != size) {
font->size = size;
FT_Set_Pixel_Sizes(font->face, 0, size);
}
}
#ifdef HAVE_FONTCONFIG
static void ass_font_reselect(void* fontconfig_priv, ass_font_t* font)
{
char* path;
int index;
FT_Face face;
int error;
path = fontconfig_select_with_charset(fontconfig_priv, font->desc.family, font->desc.bold,
font->desc.italic, &index, font->charset);
if (strcasecmp(path, font->path) == 0 && index == font->index) {
free(path);
return;
}
error = FT_New_Face(font->ftlibrary, path, index, &face);
if (error) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorOpeningFont, path, index);
return;
}
charmap_magic(face);
if (font->face) FT_Done_Face(font->face);
free(font->path);
font->face = face;
font->path = strdup(path);
font->index = index;
FT_Set_Transform(font->face, &font->m, &font->v);
FT_Set_Pixel_Sizes(font->face, 0, font->size);
}
#endif
FT_Glyph ass_font_get_glyph(void* fontconfig_priv, ass_font_t* font, uint32_t ch)
{
int error;
int index;
FT_Glyph glyph;
if (ch < 0x20)
return 0;
index = FT_Get_Char_Index(font->face, ch);
#ifdef HAVE_FONTCONFIG
FcCharSetAddChar(font->charset, ch);
if (index == 0) {
mp_msg(MSGT_ASS, MSGL_INFO, MSGTR_LIBASS_GlyphNotFoundReselectingFont,
ch, font->desc.family, font->desc.bold, font->desc.italic);
ass_font_reselect(fontconfig_priv, font);
index = FT_Get_Char_Index(font->face, ch);
if (index == 0) {
mp_msg(MSGT_ASS, MSGL_ERR, MSGTR_LIBASS_GlyphNotFound,
ch, font->desc.family, font->desc.bold, font->desc.italic);
}
}
#endif
error = FT_Load_Glyph(font->face, index, FT_LOAD_NO_BITMAP );
if (error) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorLoadingGlyph);
return 0;
}
#if (FREETYPE_MAJOR > 2) || \
((FREETYPE_MAJOR == 2) && (FREETYPE_MINOR >= 2)) || \
((FREETYPE_MAJOR == 2) && (FREETYPE_MINOR == 1) && (FREETYPE_PATCH >= 10))
// FreeType >= 2.1.10 required
if (!(font->face->style_flags & FT_STYLE_FLAG_ITALIC) &&
(font->desc.italic > 55)) {
FT_GlyphSlot_Oblique(font->face->glyph);
}
#endif
error = FT_Get_Glyph(font->face->glyph, &glyph);
if (error) {
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorLoadingGlyph);
return 0;
}
return glyph;
}
void ass_font_free(ass_font_t* font)
{
if (font->face) FT_Done_Face(font->face);
if (font->path) free(font->path);
if (font->desc.family) free(font->desc.family);
#ifdef HAVE_FONTCONFIG
if (font->charset) FcCharSetDestroy(font->charset);
#endif
free(font);
}
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