75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
|
//----------------------------------------------------------------------------
|
||
|
|
// Anti-Grain Geometry - Version 2.4
|
||
|
|
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
|
||
|
|
//
|
||
|
|
// Permission to copy, use, modify, sell and distribute this software
|
||
|
|
// is granted provided this copyright notice appears in all copies.
|
||
|
|
// This software is provided "as is" without express or implied
|
||
|
|
// warranty, and with no claim as to its suitability for any purpose.
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
// Contact: mcseem@antigrain.com
|
||
|
|
// mcseemagg@yahoo.com
|
||
|
|
// http://www.antigrain.com
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#ifndef AGG_SPAN_ALLOCATOR_INCLUDED
|
||
|
|
#define AGG_SPAN_ALLOCATOR_INCLUDED
|
||
|
|
|
||
|
|
#include "agg_basics.h"
|
||
|
|
|
||
|
|
namespace agg
|
||
|
|
{
|
||
|
|
//----------------------------------------------------------span_allocator
|
||
|
|
template<class ColorT> class span_allocator
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef ColorT color_type;
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
~span_allocator()
|
||
|
|
{
|
||
|
|
delete [] m_span;
|
||
|
|
}
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
span_allocator() :
|
||
|
|
m_max_span_len(0),
|
||
|
|
m_span(0)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
AGG_INLINE color_type* allocate(unsigned span_len)
|
||
|
|
{
|
||
|
|
if(span_len > m_max_span_len)
|
||
|
|
{
|
||
|
|
// To reduce the number of reallocs we align the
|
||
|
|
// span_len to 256 color elements.
|
||
|
|
// Well, I just like this number and it looks reasonable.
|
||
|
|
//-----------------------
|
||
|
|
delete [] m_span;
|
||
|
|
span_len = ((span_len + 255) >> 8) << 8;
|
||
|
|
m_span = new color_type[m_max_span_len = span_len];
|
||
|
|
}
|
||
|
|
return m_span;
|
||
|
|
}
|
||
|
|
|
||
|
|
AGG_INLINE color_type* span() { return m_span; }
|
||
|
|
AGG_INLINE unsigned max_span_len() const { return m_max_span_len; }
|
||
|
|
|
||
|
|
private:
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
span_allocator(const span_allocator<ColorT>&);
|
||
|
|
const span_allocator<ColorT>& operator = (const span_allocator<ColorT>&);
|
||
|
|
|
||
|
|
unsigned m_max_span_len;
|
||
|
|
color_type* m_span;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|