39241fe228
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9933 a95241bf-73f2-0310-859d-f6bbb57e9c96
293 lines
9.4 KiB
C++
293 lines
9.4 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_RGB24_PRE_INCLUDED
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#define AGG_PIXFMT_RGB24_PRE_INCLUDED
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#include <string.h>
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#include "agg_basics.h"
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#include "agg_color_rgba8.h"
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#include "agg_rendering_buffer.h"
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namespace agg
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{
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//==================================================pixel_formats_rgb24_pre
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template<class Order> class pixel_formats_rgb24_pre
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{
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public:
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typedef rgba8 color_type;
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private:
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//--------------------------------------------------------------------
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static inline void copy_pix(int8u* p, const color_type& c)
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{
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p[Order::R] = (int8u)c.r;
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p[Order::G] = (int8u)c.g;
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p[Order::B] = (int8u)c.b;
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}
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//--------------------------------------------------------------------
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static inline void blend_pix(int8u* p, const color_type& c,
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unsigned cover, unsigned alpha)
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{
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p[Order::R] = (int8u)((p[Order::R] * alpha + ((c.r * cover) << 8)) >> 16);
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p[Order::G] = (int8u)((p[Order::G] * alpha + ((c.g * cover) << 8)) >> 16);
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p[Order::B] = (int8u)((p[Order::B] * alpha + ((c.b * cover) << 8)) >> 16);
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}
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//--------------------------------------------------------------------
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static inline void copy_or_blend_pix(int8u* p, const color_type& c, unsigned cover)
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{
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unsigned alpha = 65535 - cover * c.a;
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if(alpha < 65535)
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{
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if(alpha <= 65535-255*255)
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{
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copy_pix(p, c);
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}
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else
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{
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blend_pix(p, c, cover, alpha);
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}
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}
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}
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//--------------------------------------------------------------------
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static inline void copy_or_blend_pix(int8u* p, const color_type& c)
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{
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unsigned alpha = 255 - c.a;
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if(alpha < 255)
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{
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if(alpha == 0)
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{
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copy_pix(p, c);
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}
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else
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{
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p[Order::R] = (int8u)((p[Order::R] * alpha + (c.r << 8)) >> 8);
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p[Order::G] = (int8u)((p[Order::G] * alpha + (c.g << 8)) >> 8);
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p[Order::B] = (int8u)((p[Order::B] * alpha + (c.b << 8)) >> 8);
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}
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}
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}
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public:
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//--------------------------------------------------------------------
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pixel_formats_rgb24_pre(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)
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{
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int8u* p = m_rbuf->row(y) + x + x + x;
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return color_type(p[Order::R], p[Order::G], p[Order::B]);
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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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int8u* p = m_rbuf->row(y) + x + x + x;
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p[Order::R] = (int8u)c.r;
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p[Order::G] = (int8u)c.g;
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p[Order::B] = (int8u)c.b;
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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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copy_or_blend_pix(m_rbuf->row(y) + x + x + x, c, cover);
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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 + x + x;
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do
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{
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p[Order::R] = (int8u)c.r;
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p[Order::G] = (int8u)c.g;
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p[Order::B] = (int8u)c.b;
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p += 3;
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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 + x + x;
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do
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{
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p[Order::R] = (int8u)c.r;
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p[Order::G] = (int8u)c.g;
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p[Order::B] = (int8u)c.b;
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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 + x + x;
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unsigned alpha = unsigned(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[Order::R] = (int8u)c.r;
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p[Order::G] = (int8u)c.g;
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p[Order::B] = (int8u)c.b;
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p += 3;
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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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alpha = 65535 - alpha;
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do
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{
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blend_pix(p, c, cover, alpha);
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p += 3;
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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 + x + x;
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unsigned alpha = unsigned(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[Order::R] = (int8u)c.r;
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p[Order::G] = (int8u)c.g;
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p[Order::B] = (int8u)c.b;
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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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alpha = 65535 - alpha;
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do
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{
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blend_pix(p, c, cover, alpha);
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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 * 3,
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(const void*)(from.row(ysrc) + xsrc * 3), len * 3);
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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 + x + x;
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do
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{
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copy_or_blend_pix(p, c, *covers++);
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p += 3;
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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 + x + x;
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do
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{
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copy_or_blend_pix(p, c, *covers++);
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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 + x + x;
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do
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{
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copy_or_blend_pix(p, *colors++, covers ? *covers++ : cover);
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p += 3;
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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 + x + x;
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do
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{
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copy_or_blend_pix(p, *colors++, covers ? *covers++ : cover);
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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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private:
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rendering_buffer* m_rbuf;
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};
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typedef pixel_formats_rgb24_pre<order_rgb24> pixfmt_rgb24_pre; //----pixfmt_rgb24_pre
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typedef pixel_formats_rgb24_pre<order_bgr24> pixfmt_bgr24_pre; //----pixfmt_bgr24_pre
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}
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#endif
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