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/**
* $Id:
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2009 Blender Foundation.
* All rights reserved.
*
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef WITH_FREETYPE2
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#endif /* WITH_FREETYPE2 */
#include "MEM_guardedalloc.h"
#include "DNA_listBase.h"
#include "DNA_vec_types.h"
#include "BKE_utildefines.h"
#include "BLI_blenlib.h"
#include "BLI_linklist.h" /* linknode */
#include "BLI_string.h"
#include "BLI_arithb.h"
#include "BIF_gl.h"
#include "blf_internal_types.h"
#include "blf_internal.h"
#ifdef WITH_FREETYPE2
/* freetype2 handle. */
FT_Library global_ft_lib;
int blf_font_init(void)
{
return(FT_Init_FreeType(&global_ft_lib));
}
void blf_font_exit(void)
{
FT_Done_FreeType(global_ft_lib);
}
void blf_font_fill(FontBLF *font)
{
font->ref= 1;
font->aspect= 1.0f;
font->pos[0]= 0.0f;
font->pos[1]= 0.0f;
font->angle[0]= 0.0f;
font->angle[1]= 0.0f;
font->angle[2]= 0.0f;
Mat4One(font->mat);
font->clip_rec.xmin= 0.0f;
font->clip_rec.xmax= 0.0f;
font->clip_rec.ymin= 0.0f;
font->clip_rec.ymax= 0.0f;
font->clip_mode= BLF_CLIP_DISABLE;
font->dpi= 0;
font->size= 0;
font->cache.first= NULL;
font->cache.last= NULL;
font->glyph_cache= NULL;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, (GLint *)&font->max_tex_size);
}
FontBLF *blf_font_new(char *name, char *filename)
{
FontBLF *font;
FT_Error err;
font= (FontBLF *)MEM_mallocN(sizeof(FontBLF), "blf_font_new");
err= FT_New_Face(global_ft_lib, filename, 0, &font->face);
if (err) {
MEM_freeN(font);
return(NULL);
}
err= FT_Select_Charmap(font->face, ft_encoding_unicode);
if (err) {
printf("Can't set the unicode character map!\n");
FT_Done_Face(font->face);
MEM_freeN(font);
return(NULL);
}
font->name= BLI_strdup(name);
font->filename= BLI_strdup(filename);
blf_font_fill(font);
return(font);
}
FontBLF *blf_font_new_from_mem(char *name, unsigned char *mem, int mem_size)
{
FontBLF *font;
FT_Error err;
font= (FontBLF *)MEM_mallocN(sizeof(FontBLF), "blf_font_new_from_mem");
err= FT_New_Memory_Face(global_ft_lib, mem, mem_size, 0, &font->face);
if (err) {
MEM_freeN(font);
return(NULL);
}
err= FT_Select_Charmap(font->face, ft_encoding_unicode);
if (err) {
printf("Can't set the unicode character map!\n");
FT_Done_Face(font->face);
MEM_freeN(font);
return(NULL);
}
font->name= BLI_strdup(name);
font->filename= NULL;
blf_font_fill(font);
return(font);
}
void blf_font_size(FontBLF *font, int size, int dpi)
{
GlyphCacheBLF *gc;
FT_Error err;
err= FT_Set_Char_Size(font->face, 0, (size * 64), dpi, dpi);
if (err) {
/* FIXME: here we can go through the fixed size and choice a close one */
printf("The current font don't support the size, %d and dpi, %d\n", size, dpi);
return;
}
font->size= size;
font->dpi= dpi;
gc= blf_glyph_cache_find(font, size, dpi);
if (gc)
font->glyph_cache= gc;
else {
gc= blf_glyph_cache_new(font);
if (gc)
font->glyph_cache= gc;
else
font->glyph_cache= NULL;
}
}
void blf_font_draw(FontBLF *font, char *str)
{
unsigned int c;
GlyphBLF *g, *g_prev;
FT_Vector delta;
FT_UInt glyph_index;
int pen_x, pen_y;
int i, has_kerning;
i= 0;
pen_x= 0;
pen_y= 0;
has_kerning= FT_HAS_KERNING(font->face);
g_prev= NULL;
while (str[i]) {
c= blf_utf8_next((unsigned char *)str, &i);
if (c == 0)
break;
glyph_index= FT_Get_Char_Index(font->face, c);
g= blf_glyph_search(font->glyph_cache, glyph_index);
if (!g)
g= blf_glyph_add(font, glyph_index, c);
/* if we don't found a glyph, skip it. */
if (!g)
continue;
if (has_kerning && g_prev) {
delta.x= 0;
delta.y= 0;
FT_Get_Kerning(font->face, g_prev->index, glyph_index, FT_KERNING_UNFITTED, &delta);
pen_x += delta.x >> 6;
}
blf_glyph_render(g, (float)pen_x, (float)pen_y);
pen_x += g->advance;
g_prev= g;
}
}
void blf_font_free(FontBLF *font)
{
GlyphCacheBLF *gc;
font->glyph_cache= NULL;
while (font->cache.first) {
gc= font->cache.first;
BLI_remlink(&font->cache, gc);
blf_glyph_cache_free(gc);
}
FT_Done_Face(font->face);
if (font->filename)
MEM_freeN(font->filename);
if (font->name)
MEM_freeN(font->name);
MEM_freeN(font);
}
#endif /* WITH_FREETYPE2 */
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