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/*
* gltt graphics library
* Copyright (C) 1998-1999 Stephane Rehel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include "FTGlyphBitmap.h"
#include "FTGlyph.h"
#include "freetype.h"
/////////////////////////////////////////////////////////////////////////////
FTGlyphBitmap::FTGlyphBitmap( FTGlyph* _glyph )
{
glyph= _glyph;
width= height= 0;
cols= 0;
buffer= 0;
advance= 0;
delta_x= delta_y= 0;
}
/////////////////////////////////////////////////////////////////////////////
FTGlyphBitmap::~FTGlyphBitmap()
{
destroy();
glyph= 0;
}
/////////////////////////////////////////////////////////////////////////////
void FTGlyphBitmap::destroy()
{
delete[] buffer;
buffer= 0;
width= height= 0;
cols= 0;
advance= 0;
delta_x= delta_y= 0;
}
/////////////////////////////////////////////////////////////////////////////
GLTTboolean FTGlyphBitmap::create()
{
destroy();
if( glyph == 0 )
return GLTT_FALSE;
if( glyph->getGlyph() == 0 )
return GLTT_FALSE;
TT_Glyph_Metrics metrics;
TT_Error err= TT_Get_Glyph_Metrics( *glyph->getGlyph(), &metrics );
if( err )
return GLTT_FALSE;
TT_BBox& bbox= metrics.bbox; // glyph bounding box
advance= metrics.advance;
delta_x= bbox.xMin;
delta_y= bbox.yMin;
#define FLOOR(x) ((x) & -64)
#define CEILING(x) (((x)+63) & -64)
bbox.xMin= FLOOR(bbox.xMin);
bbox.yMin= FLOOR(bbox.yMin);
bbox.xMax= CEILING(bbox.xMax);
bbox.yMax= CEILING(bbox.yMax);
#undef CEILING
#undef FLOOR
width = (bbox.xMax - bbox.xMin)/64;
height= (bbox.yMax - bbox.yMin)/64;
cols= (width+7) / 8;
int size= cols * height;
if( size <= 0 )
return GLTT_TRUE;
buffer= new unsigned char [ size ];
memset( (void*) buffer, 0, size );
TT_Raster_Map bitmap;
bitmap.width = width;
bitmap.cols = cols;
bitmap.rows = height;
bitmap.flow = TT_Flow_Up;
bitmap.size = size;
bitmap.bitmap= (void*) buffer;
err= TT_Get_Glyph_Bitmap( *glyph->getGlyph(),
&bitmap,
-bbox.xMin,
-bbox.yMin );
if( err )
{
delete buffer;
buffer= 0;
return GLTT_FALSE;
}
return GLTT_TRUE;
}
/////////////////////////////////////////////////////////////////////////////
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