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