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63 lines
2.2 KiB
C++
63 lines
2.2 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry (AGG) - Version 2.5
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// A high quality rendering engine for C++
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// Copyright (C) 2002-2006 Maxim Shemanarev
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://antigrain.com
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//
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// AGG is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// AGG is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with AGG; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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// MA 02110-1301, USA.
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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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