500 lines
18 KiB
C
500 lines
18 KiB
C
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//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.4
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// Copyright (C) 2002-2005 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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//
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// scanline_u8 class
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//
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//----------------------------------------------------------------------------
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#ifndef AGG_ALPHA_MASK_U8_INCLUDED
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#define AGG_ALPHA_MASK_U8_INCLUDED
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#include <string.h>
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#include "agg_basics.h"
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#include "agg_rendering_buffer.h"
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namespace agg
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{
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//===================================================one_component_mask_u8
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struct one_component_mask_u8
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{
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static unsigned calculate(const int8u* p) { return *p; }
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};
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//=====================================================rgb_to_gray_mask_u8
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template<unsigned R, unsigned G, unsigned B>
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struct rgb_to_gray_mask_u8
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{
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static unsigned calculate(const int8u* p)
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{
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return (p[R]*77 + p[G]*150 + p[B]*29) >> 8;
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}
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};
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//==========================================================alpha_mask_u8
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template<unsigned Step=1, unsigned Offset=0, class MaskF=one_component_mask_u8>
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class alpha_mask_u8
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{
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public:
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typedef int8u cover_type;
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typedef alpha_mask_u8<Step, Offset, MaskF> self_type;
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enum cover_scale_e
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{
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cover_shift = 8,
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cover_none = 0,
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cover_full = 255
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};
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alpha_mask_u8() : m_rbuf(0) {}
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alpha_mask_u8(rendering_buffer& rbuf) : m_rbuf(&rbuf) {}
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void attach(rendering_buffer& rbuf) { m_rbuf = &rbuf; }
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MaskF& mask_function() { return m_mask_function; }
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const MaskF& mask_function() const { return m_mask_function; }
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//--------------------------------------------------------------------
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cover_type pixel(int x, int y) const
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{
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if(x >= 0 && y >= 0 &&
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x < (int)m_rbuf->width() &&
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y <= (int)m_rbuf->height())
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{
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return (cover_type)m_mask_function.calculate(
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m_rbuf->row_ptr(y) + x * Step + Offset);
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}
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return 0;
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}
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//--------------------------------------------------------------------
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cover_type combine_pixel(int x, int y, cover_type val) const
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{
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if(x >= 0 && y >= 0 &&
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x < (int)m_rbuf->width() &&
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y <= (int)m_rbuf->height())
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{
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return (cover_type)((cover_full + val *
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m_mask_function.calculate(
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m_rbuf->row_ptr(y) + x * Step + Offset)) >>
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cover_shift);
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}
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return 0;
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}
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//--------------------------------------------------------------------
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void fill_hspan(int x, int y, cover_type* dst, int num_pix) const
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{
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int xmax = m_rbuf->width() - 1;
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int ymax = m_rbuf->height() - 1;
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int count = num_pix;
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cover_type* covers = dst;
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if(y < 0 || y > ymax)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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if(x < 0)
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{
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count += x;
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if(count <= 0)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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memset(covers, 0, -x * sizeof(cover_type));
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covers -= x;
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x = 0;
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}
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if(x + count > xmax)
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{
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int rest = x + count - xmax - 1;
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count -= rest;
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if(count <= 0)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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memset(covers + count, 0, rest * sizeof(cover_type));
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}
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const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
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do
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{
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*covers++ = (cover_type)m_mask_function.calculate(mask);
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mask += Step;
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}
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while(--count);
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}
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//--------------------------------------------------------------------
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void combine_hspan(int x, int y, cover_type* dst, int num_pix) const
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{
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int xmax = m_rbuf->width() - 1;
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int ymax = m_rbuf->height() - 1;
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int count = num_pix;
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cover_type* covers = dst;
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if(y < 0 || y > ymax)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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if(x < 0)
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{
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count += x;
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if(count <= 0)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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memset(covers, 0, -x * sizeof(cover_type));
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covers -= x;
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x = 0;
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}
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if(x + count > xmax)
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{
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int rest = x + count - xmax - 1;
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count -= rest;
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if(count <= 0)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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memset(covers + count, 0, rest * sizeof(cover_type));
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}
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const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
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do
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{
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*covers = (cover_type)((cover_full + (*covers) *
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m_mask_function.calculate(mask)) >>
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cover_shift);
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++covers;
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mask += Step;
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}
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while(--count);
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}
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//--------------------------------------------------------------------
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void fill_vspan(int x, int y, cover_type* dst, int num_pix) const
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{
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int xmax = m_rbuf->width() - 1;
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int ymax = m_rbuf->height() - 1;
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int count = num_pix;
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cover_type* covers = dst;
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if(x < 0 || x > xmax)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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if(y < 0)
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{
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count += y;
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if(count <= 0)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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memset(covers, 0, -y * sizeof(cover_type));
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covers -= y;
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y = 0;
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}
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if(y + count > ymax)
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{
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int rest = y + count - ymax - 1;
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count -= rest;
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if(count <= 0)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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memset(covers + count, 0, rest * sizeof(cover_type));
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}
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const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
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do
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{
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*covers++ = (cover_type)m_mask_function.calculate(mask);
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mask += m_rbuf->stride();
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}
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while(--count);
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}
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//--------------------------------------------------------------------
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void combine_vspan(int x, int y, cover_type* dst, int num_pix) const
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{
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int xmax = m_rbuf->width() - 1;
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int ymax = m_rbuf->height() - 1;
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int count = num_pix;
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cover_type* covers = dst;
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if(x < 0 || x > xmax)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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if(y < 0)
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{
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count += y;
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if(count <= 0)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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memset(covers, 0, -y * sizeof(cover_type));
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covers -= y;
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y = 0;
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}
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if(y + count > ymax)
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{
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int rest = y + count - ymax - 1;
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count -= rest;
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if(count <= 0)
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{
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memset(dst, 0, num_pix * sizeof(cover_type));
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return;
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}
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memset(covers + count, 0, rest * sizeof(cover_type));
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}
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const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
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do
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{
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*covers = (cover_type)((cover_full + (*covers) *
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m_mask_function.calculate(mask)) >>
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cover_shift);
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++covers;
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mask += m_rbuf->stride();
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}
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while(--count);
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}
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private:
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alpha_mask_u8(const self_type&);
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const self_type& operator = (const self_type&);
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rendering_buffer* m_rbuf;
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MaskF m_mask_function;
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};
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typedef alpha_mask_u8<1, 0> alpha_mask_gray8; //----alpha_mask_gray8
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typedef alpha_mask_u8<3, 0> alpha_mask_rgb24r; //----alpha_mask_rgb24r
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typedef alpha_mask_u8<3, 1> alpha_mask_rgb24g; //----alpha_mask_rgb24g
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typedef alpha_mask_u8<3, 2> alpha_mask_rgb24b; //----alpha_mask_rgb24b
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typedef alpha_mask_u8<3, 2> alpha_mask_bgr24r; //----alpha_mask_bgr24r
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typedef alpha_mask_u8<3, 1> alpha_mask_bgr24g; //----alpha_mask_bgr24g
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typedef alpha_mask_u8<3, 0> alpha_mask_bgr24b; //----alpha_mask_bgr24b
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typedef alpha_mask_u8<4, 0> alpha_mask_rgba32r; //----alpha_mask_rgba32r
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typedef alpha_mask_u8<4, 1> alpha_mask_rgba32g; //----alpha_mask_rgba32g
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typedef alpha_mask_u8<4, 2> alpha_mask_rgba32b; //----alpha_mask_rgba32b
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typedef alpha_mask_u8<4, 3> alpha_mask_rgba32a; //----alpha_mask_rgba32a
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typedef alpha_mask_u8<4, 1> alpha_mask_argb32r; //----alpha_mask_argb32r
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typedef alpha_mask_u8<4, 2> alpha_mask_argb32g; //----alpha_mask_argb32g
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typedef alpha_mask_u8<4, 3> alpha_mask_argb32b; //----alpha_mask_argb32b
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typedef alpha_mask_u8<4, 0> alpha_mask_argb32a; //----alpha_mask_argb32a
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typedef alpha_mask_u8<4, 2> alpha_mask_bgra32r; //----alpha_mask_bgra32r
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typedef alpha_mask_u8<4, 1> alpha_mask_bgra32g; //----alpha_mask_bgra32g
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typedef alpha_mask_u8<4, 0> alpha_mask_bgra32b; //----alpha_mask_bgra32b
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typedef alpha_mask_u8<4, 3> alpha_mask_bgra32a; //----alpha_mask_bgra32a
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typedef alpha_mask_u8<4, 3> alpha_mask_abgr32r; //----alpha_mask_abgr32r
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typedef alpha_mask_u8<4, 2> alpha_mask_abgr32g; //----alpha_mask_abgr32g
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typedef alpha_mask_u8<4, 1> alpha_mask_abgr32b; //----alpha_mask_abgr32b
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typedef alpha_mask_u8<4, 0> alpha_mask_abgr32a; //----alpha_mask_abgr32a
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typedef alpha_mask_u8<3, 0, rgb_to_gray_mask_u8<0, 1, 2> > alpha_mask_rgb24gray; //----alpha_mask_rgb24gray
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typedef alpha_mask_u8<3, 0, rgb_to_gray_mask_u8<2, 1, 0> > alpha_mask_bgr24gray; //----alpha_mask_bgr24gray
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typedef alpha_mask_u8<4, 0, rgb_to_gray_mask_u8<0, 1, 2> > alpha_mask_rgba32gray; //----alpha_mask_rgba32gray
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typedef alpha_mask_u8<4, 1, rgb_to_gray_mask_u8<0, 1, 2> > alpha_mask_argb32gray; //----alpha_mask_argb32gray
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typedef alpha_mask_u8<4, 0, rgb_to_gray_mask_u8<2, 1, 0> > alpha_mask_bgra32gray; //----alpha_mask_bgra32gray
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typedef alpha_mask_u8<4, 1, rgb_to_gray_mask_u8<2, 1, 0> > alpha_mask_abgr32gray; //----alpha_mask_abgr32gray
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//==========================================================amask_no_clip_u8
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template<unsigned Step=1, unsigned Offset=0, class MaskF=one_component_mask_u8>
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class amask_no_clip_u8
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{
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public:
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typedef int8u cover_type;
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typedef amask_no_clip_u8<Step, Offset, MaskF> self_type;
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enum cover_scale_e
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{
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cover_shift = 8,
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cover_none = 0,
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cover_full = 255
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};
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amask_no_clip_u8() : m_rbuf(0) {}
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amask_no_clip_u8(rendering_buffer& rbuf) : m_rbuf(&rbuf) {}
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void attach(rendering_buffer& rbuf) { m_rbuf = &rbuf; }
|
||
|
|
|
||
|
|
MaskF& mask_function() { return m_mask_function; }
|
||
|
|
const MaskF& mask_function() const { return m_mask_function; }
|
||
|
|
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
cover_type pixel(int x, int y) const
|
||
|
|
{
|
||
|
|
return (cover_type)m_mask_function.calculate(
|
||
|
|
m_rbuf->row_ptr(y) + x * Step + Offset);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
cover_type combine_pixel(int x, int y, cover_type val) const
|
||
|
|
{
|
||
|
|
return (cover_type)((cover_full + val *
|
||
|
|
m_mask_function.calculate(
|
||
|
|
m_rbuf->row_ptr(y) + x * Step + Offset)) >>
|
||
|
|
cover_shift);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
void fill_hspan(int x, int y, cover_type* dst, int num_pix) const
|
||
|
|
{
|
||
|
|
const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
*dst++ = (cover_type)m_mask_function.calculate(mask);
|
||
|
|
mask += Step;
|
||
|
|
}
|
||
|
|
while(--num_pix);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
void combine_hspan(int x, int y, cover_type* dst, int num_pix) const
|
||
|
|
{
|
||
|
|
const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
*dst = (cover_type)((cover_full + (*dst) *
|
||
|
|
m_mask_function.calculate(mask)) >>
|
||
|
|
cover_shift);
|
||
|
|
++dst;
|
||
|
|
mask += Step;
|
||
|
|
}
|
||
|
|
while(--num_pix);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
void fill_vspan(int x, int y, cover_type* dst, int num_pix) const
|
||
|
|
{
|
||
|
|
const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
*dst++ = (cover_type)m_mask_function.calculate(mask);
|
||
|
|
mask += m_rbuf->stride();
|
||
|
|
}
|
||
|
|
while(--num_pix);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------
|
||
|
|
void combine_vspan(int x, int y, cover_type* dst, int num_pix) const
|
||
|
|
{
|
||
|
|
const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
*dst = (cover_type)((cover_full + (*dst) *
|
||
|
|
m_mask_function.calculate(mask)) >>
|
||
|
|
cover_shift);
|
||
|
|
++dst;
|
||
|
|
mask += m_rbuf->stride();
|
||
|
|
}
|
||
|
|
while(--num_pix);
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
amask_no_clip_u8(const self_type&);
|
||
|
|
const self_type& operator = (const self_type&);
|
||
|
|
|
||
|
|
rendering_buffer* m_rbuf;
|
||
|
|
MaskF m_mask_function;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
typedef amask_no_clip_u8<1, 0> amask_no_clip_gray8; //----amask_no_clip_gray8
|
||
|
|
|
||
|
|
typedef amask_no_clip_u8<3, 0> amask_no_clip_rgb24r; //----amask_no_clip_rgb24r
|
||
|
|
typedef amask_no_clip_u8<3, 1> amask_no_clip_rgb24g; //----amask_no_clip_rgb24g
|
||
|
|
typedef amask_no_clip_u8<3, 2> amask_no_clip_rgb24b; //----amask_no_clip_rgb24b
|
||
|
|
|
||
|
|
typedef amask_no_clip_u8<3, 2> amask_no_clip_bgr24r; //----amask_no_clip_bgr24r
|
||
|
|
typedef amask_no_clip_u8<3, 1> amask_no_clip_bgr24g; //----amask_no_clip_bgr24g
|
||
|
|
typedef amask_no_clip_u8<3, 0> amask_no_clip_bgr24b; //----amask_no_clip_bgr24b
|
||
|
|
|
||
|
|
typedef amask_no_clip_u8<4, 0> amask_no_clip_rgba32r; //----amask_no_clip_rgba32r
|
||
|
|
typedef amask_no_clip_u8<4, 1> amask_no_clip_rgba32g; //----amask_no_clip_rgba32g
|
||
|
|
typedef amask_no_clip_u8<4, 2> amask_no_clip_rgba32b; //----amask_no_clip_rgba32b
|
||
|
|
typedef amask_no_clip_u8<4, 3> amask_no_clip_rgba32a; //----amask_no_clip_rgba32a
|
||
|
|
|
||
|
|
typedef amask_no_clip_u8<4, 1> amask_no_clip_argb32r; //----amask_no_clip_argb32r
|
||
|
|
typedef amask_no_clip_u8<4, 2> amask_no_clip_argb32g; //----amask_no_clip_argb32g
|
||
|
|
typedef amask_no_clip_u8<4, 3> amask_no_clip_argb32b; //----amask_no_clip_argb32b
|
||
|
|
typedef amask_no_clip_u8<4, 0> amask_no_clip_argb32a; //----amask_no_clip_argb32a
|
||
|
|
|
||
|
|
typedef amask_no_clip_u8<4, 2> amask_no_clip_bgra32r; //----amask_no_clip_bgra32r
|
||
|
|
typedef amask_no_clip_u8<4, 1> amask_no_clip_bgra32g; //----amask_no_clip_bgra32g
|
||
|
|
typedef amask_no_clip_u8<4, 0> amask_no_clip_bgra32b; //----amask_no_clip_bgra32b
|
||
|
|
typedef amask_no_clip_u8<4, 3> amask_no_clip_bgra32a; //----amask_no_clip_bgra32a
|
||
|
|
|
||
|
|
typedef amask_no_clip_u8<4, 3> amask_no_clip_abgr32r; //----amask_no_clip_abgr32r
|
||
|
|
typedef amask_no_clip_u8<4, 2> amask_no_clip_abgr32g; //----amask_no_clip_abgr32g
|
||
|
|
typedef amask_no_clip_u8<4, 1> amask_no_clip_abgr32b; //----amask_no_clip_abgr32b
|
||
|
|
typedef amask_no_clip_u8<4, 0> amask_no_clip_abgr32a; //----amask_no_clip_abgr32a
|
||
|
|
|
||
|
|
typedef amask_no_clip_u8<3, 0, rgb_to_gray_mask_u8<0, 1, 2> > amask_no_clip_rgb24gray; //----amask_no_clip_rgb24gray
|
||
|
|
typedef amask_no_clip_u8<3, 0, rgb_to_gray_mask_u8<2, 1, 0> > amask_no_clip_bgr24gray; //----amask_no_clip_bgr24gray
|
||
|
|
typedef amask_no_clip_u8<4, 0, rgb_to_gray_mask_u8<0, 1, 2> > amask_no_clip_rgba32gray; //----amask_no_clip_rgba32gray
|
||
|
|
typedef amask_no_clip_u8<4, 1, rgb_to_gray_mask_u8<0, 1, 2> > amask_no_clip_argb32gray; //----amask_no_clip_argb32gray
|
||
|
|
typedef amask_no_clip_u8<4, 0, rgb_to_gray_mask_u8<2, 1, 0> > amask_no_clip_bgra32gray; //----amask_no_clip_bgra32gray
|
||
|
|
typedef amask_no_clip_u8<4, 1, rgb_to_gray_mask_u8<2, 1, 0> > amask_no_clip_abgr32gray; //----amask_no_clip_abgr32gray
|
||
|
|
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|