322 lines
11 KiB
C++
322 lines
11 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.2
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// Copyright (C) 2002-2004 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_PIXFMT_GRAY8_INCLUDED
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#define AGG_PIXFMT_GRAY8_INCLUDED
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#include <string.h>
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#include "agg_basics.h"
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#include "agg_gray8.h"
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#include "agg_rendering_buffer.h"
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namespace agg
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{
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//======================================================pixfmt_gray8_base
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template<unsigned Step=1, unsigned Offset=0>
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class pixfmt_gray8_base
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{
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public:
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typedef gray8 color_type;
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typedef bool order_type;
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typedef rendering_buffer::row_data row_data;
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//--------------------------------------------------------------------
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pixfmt_gray8_base(rendering_buffer& rb)
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: m_rbuf(&rb)
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{
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}
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//--------------------------------------------------------------------
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unsigned width() const { return m_rbuf->width(); }
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unsigned height() const { return m_rbuf->height(); }
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//--------------------------------------------------------------------
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color_type pixel(int x, int y) const
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{
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return color_type(m_rbuf->row(y)[x * Step + Offset]);
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}
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//--------------------------------------------------------------------
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row_data span(int x, int y) const
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{
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return row_data(x, width() - 1, m_rbuf->row(y) + x);
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}
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//--------------------------------------------------------------------
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void copy_pixel(int x, int y, const color_type& c)
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{
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m_rbuf->row(y)[x * Step + Offset] = (int8u)c.v;
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}
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//--------------------------------------------------------------------
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void blend_pixel(int x, int y, const color_type& c, int8u cover)
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{
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int8u* p = m_rbuf->row(y) + x * Step + Offset;
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int v = *p;
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int alpha = int(cover) * c.a;
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*p = (int8u)((((c.v - v) * alpha) + (v << 16)) >> 16);
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}
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//--------------------------------------------------------------------
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void copy_hline(int x, int y, unsigned len, const color_type& c)
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{
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int8u* p = m_rbuf->row(y) + x * Step + Offset;
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do
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{
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*p = (int8u)c.v;
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p += Step;
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void copy_vline(int x, int y, unsigned len, const color_type& c)
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{
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int8u* p = m_rbuf->row(y) + x * Step + Offset;
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do
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{
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*p = (int8u)c.v;
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p += m_rbuf->stride();
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void blend_hline(int x, int y, unsigned len,
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const color_type& c, int8u cover)
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{
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int8u* p = m_rbuf->row(y) + x * Step + Offset;
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int alpha = int(cover) * c.a;
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if(alpha == 255*255)
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{
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do
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{
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*p = (int8u)c.v;
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p += Step;
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}
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while(--len);
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}
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else
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{
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do
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{
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int v = *p;
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*p = (int8u)((((c.v - v) * alpha) + (v << 16)) >> 16);
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p += Step;
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}
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while(--len);
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}
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}
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//--------------------------------------------------------------------
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void blend_vline(int x, int y, unsigned len,
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const color_type& c, int8u cover)
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{
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int8u* p = m_rbuf->row(y) + x * Step + Offset;
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int alpha = int(cover) * c.a;
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if(alpha == 255*255)
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{
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do
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{
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*p = (int8u)c.v;
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p += m_rbuf->stride();
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}
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while(--len);
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}
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else
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{
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do
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{
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int v = *p;
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*p = (int8u)((((c.v - v) * alpha) + (v << 16)) >> 16);
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p += m_rbuf->stride();
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}
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while(--len);
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}
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}
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//--------------------------------------------------------------------
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void copy_from(const rendering_buffer& from,
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int xdst, int ydst,
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int xsrc, int ysrc,
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unsigned len)
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{
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memmove(m_rbuf->row(ydst) + xdst * Step + Offset,
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(const void*)(from.row(ysrc) + xsrc * Step + Offset),
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len * Step);
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}
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//--------------------------------------------------------------------
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void blend_solid_hspan(int x, int y, unsigned len,
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const color_type& c, const int8u* covers)
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{
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int8u* p = m_rbuf->row(y) + x * Step + Offset;
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do
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{
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int alpha = int(*covers++) * c.a;
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if(alpha)
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{
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if(alpha == 255*255)
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{
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*p = (int8u)c.v;
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}
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else
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{
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int v = *p;
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*p = (int8u)((((c.v - v) * alpha) + (v << 16)) >> 16);
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}
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}
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p += Step;
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void blend_solid_vspan(int x, int y, unsigned len,
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const color_type& c, const int8u* covers)
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{
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int8u* p = m_rbuf->row(y) + x * Step + Offset;
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do
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{
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int alpha = int(*covers++) * c.a;
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if(alpha)
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{
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if(alpha == 255*255)
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{
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*p = (int8u)c.v;
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}
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else
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{
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int v = *p;
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*p = (int8u)((((c.v - v) * alpha) + (v << 16)) >> 16);
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}
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}
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p += m_rbuf->stride();
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void blend_color_hspan(int x, int y, unsigned len,
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const color_type* colors,
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const int8u* covers,
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int8u cover)
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{
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int8u* p = m_rbuf->row(y) + x * Step + Offset;
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do
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{
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int alpha = colors->a * (covers ? int(*covers++) : int(cover));
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if(alpha)
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{
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if(alpha == 255*255)
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{
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*p = (int8u)colors->v;
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}
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else
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{
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int v = *p;
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*p = (int8u)((((colors->v - v) * alpha) + (v << 16)) >> 16);
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}
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}
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p += Step;
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++colors;
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void blend_color_vspan(int x, int y, unsigned len,
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const color_type* colors,
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const int8u* covers,
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int8u cover)
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{
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int8u* p = m_rbuf->row(y) + x * Step + Offset;
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do
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{
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int alpha = colors->a * (covers ? int(*covers++) : int(cover));
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if(alpha)
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{
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if(alpha == 255*255)
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{
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*p = (int8u)colors->v;
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}
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else
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{
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int v = *p;
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*p = (int8u)((((colors->v - v) * alpha) + (v << 16)) >> 16);
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}
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}
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p += m_rbuf->stride();
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++colors;
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}
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while(--len);
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}
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private:
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rendering_buffer* m_rbuf;
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};
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typedef pixfmt_gray8_base<1, 0> pixfmt_gray8; //----pixfmt_gray8
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typedef pixfmt_gray8_base<3, 0> pixfmt_gray8_rgb24r; //----pixfmt_gray8_rgb24r
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typedef pixfmt_gray8_base<3, 1> pixfmt_gray8_rgb24g; //----pixfmt_gray8_rgb24g
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typedef pixfmt_gray8_base<3, 2> pixfmt_gray8_rgb24b; //----pixfmt_gray8_rgb24b
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typedef pixfmt_gray8_base<3, 2> pixfmt_gray8_bgr24r; //----pixfmt_gray8_bgr24r
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typedef pixfmt_gray8_base<3, 1> pixfmt_gray8_bgr24g; //----pixfmt_gray8_bgr24g
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typedef pixfmt_gray8_base<3, 0> pixfmt_gray8_bgr24b; //----pixfmt_gray8_bgr24b
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typedef pixfmt_gray8_base<4, 0> pixfmt_gray8_rgba32r; //----pixfmt_gray8_rgba32r
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typedef pixfmt_gray8_base<4, 1> pixfmt_gray8_rgba32g; //----pixfmt_gray8_rgba32g
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typedef pixfmt_gray8_base<4, 2> pixfmt_gray8_rgba32b; //----pixfmt_gray8_rgba32b
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typedef pixfmt_gray8_base<4, 3> pixfmt_gray8_rgba32a; //----pixfmt_gray8_rgba32a
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typedef pixfmt_gray8_base<4, 1> pixfmt_gray8_argb32r; //----pixfmt_gray8_argb32r
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typedef pixfmt_gray8_base<4, 2> pixfmt_gray8_argb32g; //----pixfmt_gray8_argb32g
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typedef pixfmt_gray8_base<4, 3> pixfmt_gray8_argb32b; //----pixfmt_gray8_argb32b
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typedef pixfmt_gray8_base<4, 0> pixfmt_gray8_argb32a; //----pixfmt_gray8_argb32a
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typedef pixfmt_gray8_base<4, 2> pixfmt_gray8_bgra32r; //----pixfmt_gray8_bgra32r
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typedef pixfmt_gray8_base<4, 1> pixfmt_gray8_bgra32g; //----pixfmt_gray8_bgra32g
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typedef pixfmt_gray8_base<4, 0> pixfmt_gray8_bgra32b; //----pixfmt_gray8_bgra32b
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typedef pixfmt_gray8_base<4, 3> pixfmt_gray8_bgra32a; //----pixfmt_gray8_bgra32a
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typedef pixfmt_gray8_base<4, 3> pixfmt_gray8_abgr32r; //----pixfmt_gray8_abgr32r
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typedef pixfmt_gray8_base<4, 2> pixfmt_gray8_abgr32g; //----pixfmt_gray8_abgr32g
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typedef pixfmt_gray8_base<4, 1> pixfmt_gray8_abgr32b; //----pixfmt_gray8_abgr32b
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typedef pixfmt_gray8_base<4, 0> pixfmt_gray8_abgr32a; //----pixfmt_gray8_abgr32a
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}
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#endif
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