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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.2
// Copyright (C) 2002-2004 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_PATTERN_RGBA32_INCLUDED
#define AGG_SPAN_PATTERN_RGBA32_INCLUDED
#include "agg_basics.h"
#include "agg_pixfmt_rgba32.h"
#include "agg_span_pattern.h"
namespace agg
{
//======================================================span_pattern_rgba32
template<class Order, class Allocator = span_allocator<rgba8> >
class span_pattern_rgba32 : public span_pattern<rgba8, int8u, Allocator>
{
public:
typedef Allocator alloc_type;
typedef rgba8 color_type;
typedef span_pattern<color_type, int8u, alloc_type> base_type;
//--------------------------------------------------------------------
span_pattern_rgba32(alloc_type& alloc) : base_type(alloc) {}
//----------------------------------------------------------------
span_pattern_rgba32(alloc_type& alloc,
const rendering_buffer& src,
unsigned offset_x, unsigned offset_y) :
base_type(alloc, src, offset_x, offset_y, 0)
{}
//--------------------------------------------------------------------
color_type* generate(int x, int y, unsigned len)
{
color_type* span = base_type::allocator().span();
unsigned sx = (base_type::offset_x() + x) % base_type::source_image().width();
unsigned wp = base_type::source_image().width() << 2;
const int8u* p = base_type::source_image().row((base_type::offset_y() + y) % base_type::source_image().height());
p += sx << 2;
do
{
span->r = p[Order::R];
span->g = p[Order::G];
span->b = p[Order::B];
span->a = p[Order::A];
p += 4;
++sx;
++span;
if(sx >= base_type::source_image().width())
{
sx -= base_type::source_image().width();
p -= wp;
}
}
while(--len);
return base_type::allocator().span();
}
};
}
#endif
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