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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.3
// 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
//----------------------------------------------------------------------------
//
// Adaptation for high precision colors has been sponsored by
// Liberty Technology Systems, Inc., visit http://lib-sys.com
//
// Liberty Technology Systems, Inc. is the provider of
// PostScript and PDF technology for software developers.
//
//----------------------------------------------------------------------------
#ifndef AGG_SPAN_PATTERN_RGBA_INCLUDED
#define AGG_SPAN_PATTERN_RGBA_INCLUDED
#include "agg_basics.h"
#include "agg_pixfmt_rgba.h"
#include "agg_span_pattern.h"
namespace agg
{
//======================================================span_pattern_rgba
template<class ColorT,
class Order,
class WrapModeX,
class WrapModeY,
class Allocator = span_allocator<ColorT> >
class span_pattern_rgba : public span_pattern_base<ColorT, Allocator>
{
public:
typedef ColorT color_type;
typedef Order order_type;
typedef Allocator alloc_type;
typedef span_pattern_base<color_type, alloc_type> base_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
enum
{
base_shift = color_type::base_shift,
base_mask = color_type::base_mask
};
//--------------------------------------------------------------------
span_pattern_rgba(alloc_type& alloc) :
base_type(alloc),
m_wrap_mode_x(1),
m_wrap_mode_y(1)
{}
//----------------------------------------------------------------
span_pattern_rgba(alloc_type& alloc,
const rendering_buffer& src,
unsigned offset_x, unsigned offset_y) :
base_type(alloc, src, offset_x, offset_y, 0),
m_wrap_mode_x(src.width()),
m_wrap_mode_y(src.height())
{}
//-------------------------------------------------------------------
void source_image(const rendering_buffer& src)
{
base_type::source_image(src);
m_wrap_mode_x = WrapModeX(src.width());
m_wrap_mode_y = WrapModeY(src.height());
}
//--------------------------------------------------------------------
color_type* generate(int x, int y, unsigned len)
{
color_type* span = base_type::allocator().span();
unsigned sx = m_wrap_mode_x(base_type::offset_x() + x);
const value_type* row_ptr =
(const value_type*)base_type::source_image().row(
m_wrap_mode_y(
base_type::offset_y() + y));
do
{
const value_type* p = row_ptr + (sx << 2);
span->r = p[order_type::R];
span->g = p[order_type::G];
span->b = p[order_type::B];
span->a = p[order_type::A];
sx = ++m_wrap_mode_x;
++span;
}
while(--len);
return base_type::allocator().span();
}
private:
WrapModeX m_wrap_mode_x;
WrapModeY m_wrap_mode_y;
};
}
#endif
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