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/*
* gltt graphics library
* Copyright (C) 1998 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 "FTInstance.h"
#include "FTFace.h"
#include "FTEngine.h"
#include "freetype.h"
/////////////////////////////////////////////////////////////////////////////
FTInstance::FTInstance( FTFace* _face )
{
face= _face;
instance= 0;
}
/////////////////////////////////////////////////////////////////////////////
FTInstance::~FTInstance()
{
if( instance != 0 )
{
TT_Done_Instance(*instance);
delete instance;
instance= 0;
}
face= 0;
}
/////////////////////////////////////////////////////////////////////////////
GLTTboolean FTInstance::create()
{
if( instance != 0 )
return GLTT_TRUE;
if( face == 0 )
return GLTT_FALSE;
if( face->getFace() == 0 )
return GLTT_FALSE;
instance= new TT_Instance;
if( TT_New_Instance( *face->getFace(), instance ) )
{
delete instance;
instance= 0;
return GLTT_FALSE;
}
return GLTT_TRUE;
}
/////////////////////////////////////////////////////////////////////////////
GLTTboolean FTInstance::setResolutions( int x_resolution, int y_resolution )
{
if( instance == 0 )
return GLTT_FALSE;
TT_Error err= TT_Set_Instance_Resolutions( *instance,
x_resolution, y_resolution );
return err == 0;
}
/////////////////////////////////////////////////////////////////////////////
GLTTboolean FTInstance::setPointSize( int point_size )
{
if( instance == 0 )
return GLTT_FALSE;
TT_Error err= TT_Set_Instance_PointSize( *instance, point_size );
return err == 0;
}
/////////////////////////////////////////////////////////////////////////////
int FTInstance::getHeight() const
{
if( instance == 0 )
return 0;
TT_Instance_Metrics imetrics;
TT_Error err= TT_Get_Instance_Metrics( *instance, &imetrics );
if( err )
return 0;
return (imetrics.pointSize * imetrics.y_resolution) / (72*64);
}
/////////////////////////////////////////////////////////////////////////////
// Contributed by Karl Anders Oygard <Karl.Oygard@fou.telenor.no>
int FTInstance::getDescender() const
{
if( instance == 0 || face == 0 )
return 0;
TT_Instance_Metrics imetrics;
TT_Face_Properties properties;
TT_Error err;
err= TT_Get_Face_Properties( *face->getFace(), &properties );
if( err )
return 0;
err= TT_Get_Instance_Metrics( *instance, &imetrics );
if( err )
return 0;
return (properties.horizontal->Descender * imetrics.y_ppem) /
properties.header->Units_Per_EM;
}
/////////////////////////////////////////////////////////////////////////////
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