664 lines
19 KiB
C++
664 lines
19 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2017 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_GRID_PIXFMT_HPP
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#define MAPNIK_GRID_PIXFMT_HPP
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#include <string>
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#include <mapnik/grid/grid_rendering_buffer.hpp>
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#include <mapnik/warning.hpp>
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MAPNIK_DISABLE_WARNING_PUSH
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#include <mapnik/warning_ignore.hpp>
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#include "agg_basics.h"
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#include <mapnik/grid/grid_pixel.hpp>
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MAPNIK_DISABLE_WARNING_POP
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namespace mapnik
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{
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//============================================================blender_gray
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template<typename ColorT> struct blender_gray
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{
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using color_type = ColorT;
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using value_type = typename color_type::value_type;
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using calc_type = typename color_type::calc_type;
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enum base_scale_e { base_shift = color_type::base_shift };
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static AGG_INLINE void blend_pix(value_type* p, unsigned cv,
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unsigned alpha, unsigned /*cover*/=0)
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{
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*p = (value_type)((((cv - calc_type(*p)) * alpha) + (calc_type(*p) << base_shift)) >> base_shift);
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}
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};
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//=====================================================apply_gamma_dir_gray
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template<typename ColorT, class GammaLut> class apply_gamma_dir_gray
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{
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public:
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using value_type = typename ColorT::value_type;
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apply_gamma_dir_gray(const GammaLut& gamma) : m_gamma(gamma) {}
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AGG_INLINE void operator () (value_type* p)
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{
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*p = m_gamma.dir(*p);
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}
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private:
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const GammaLut& m_gamma;
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};
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//=====================================================apply_gamma_inv_gray
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template<typename ColorT, class GammaLut> class apply_gamma_inv_gray
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{
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public:
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using value_type = typename ColorT::value_type;
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apply_gamma_inv_gray(const GammaLut& gamma) : m_gamma(gamma) {}
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AGG_INLINE void operator () (value_type* p)
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{
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*p = m_gamma.inv(*p);
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}
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private:
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const GammaLut& m_gamma;
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};
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//=================================================pixfmt_alpha_blend_gray
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template<typename Blender, class RenBuf, unsigned Step=1, unsigned Offset=0>
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class pixfmt_alpha_blend_gray
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{
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public:
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using rbuf_type = RenBuf ;
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using row_data = typename rbuf_type::row_data;
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using blender_type = Blender ;
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using color_type = typename blender_type::color_type;
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using order_type = int ; // A fake one
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using value_type = typename color_type::value_type ;
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using calc_type = typename color_type::calc_type ;
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enum base_scale_e
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{
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base_shift = color_type::base_shift,
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base_scale = color_type::base_scale,
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base_mask = color_type::base_mask,
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pix_width = sizeof(value_type),
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pix_step = Step,
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pix_offset = Offset
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};
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private:
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//--------------------------------------------------------------------
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static AGG_INLINE void copy_or_blend_pix(value_type* p,
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const color_type& c,
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unsigned cover)
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{
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if (c.a)
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{
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calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
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if(alpha == base_mask)
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{
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*p = c.v;
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}
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else
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{
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Blender::blend_pix(p, c.v, alpha, cover);
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}
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}
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}
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static AGG_INLINE void copy_or_blend_pix(value_type* p,
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const color_type& c)
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{
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if (c.a)
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{
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if(c.a == base_mask)
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{
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*p = c.v;
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}
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else
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{
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Blender::blend_pix(p, c.v, c.a);
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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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explicit pixfmt_alpha_blend_gray(rbuf_type& rb) :
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m_rbuf(&rb)
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{}
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void attach(rbuf_type& rb) { m_rbuf = &rb; }
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//--------------------------------------------------------------------
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template<typename PixFmt>
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bool attach(PixFmt& pixf, int x1, int y1, int x2, int y2)
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{
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agg::rect_i r(x1, y1, x2, y2);
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if(r.clip(agg::rect_i(0, 0, pixf.width()-1, pixf.height()-1)))
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{
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int stride = pixf.stride();
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m_rbuf->attach(pixf.pix_ptr(r.x1, stride < 0 ? r.y2 : r.y1),
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(r.x2 - r.x1) + 1,
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(r.y2 - r.y1) + 1,
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stride);
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return true;
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}
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return false;
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}
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//--------------------------------------------------------------------
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AGG_INLINE unsigned width() const { return m_rbuf->width(); }
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AGG_INLINE unsigned height() const { return m_rbuf->height(); }
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AGG_INLINE int stride() const { return m_rbuf->stride(); }
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//--------------------------------------------------------------------
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agg::int8u* row_ptr(int y) { return m_rbuf->row_ptr(y); }
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const agg::int8u* row_ptr(int y) const { return m_rbuf->row_ptr(y); }
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row_data row(int y) const { return m_rbuf->row(y); }
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const agg::int8u* pix_ptr(int x, int y) const
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{
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return m_rbuf->row_ptr(y) + x * Step + Offset;
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}
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agg::int8u* pix_ptr(int x, int y)
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{
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return m_rbuf->row_ptr(y) + x * Step + Offset;
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}
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//--------------------------------------------------------------------
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AGG_INLINE static void make_pix(agg::int8u* p, const color_type& c)
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{
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*(value_type*)p = c.v;
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}
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//--------------------------------------------------------------------
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AGG_INLINE color_type pixel(int x, int y) const
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{
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value_type* p = (value_type*)m_rbuf->row_ptr(y) + x * Step + Offset;
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return color_type(*p);
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}
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//--------------------------------------------------------------------
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AGG_INLINE void copy_pixel(int x, int y, const color_type& c)
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{
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*((value_type*)m_rbuf->row_ptr(x, y, 1) + x * Step + Offset) = c.v;
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}
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//--------------------------------------------------------------------
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AGG_INLINE void blend_pixel(int x, int y, const color_type& c, agg::int8u cover)
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{
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copy_or_blend_pix((value_type*)
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m_rbuf->row_ptr(x, y, 1) + x * Step + Offset,
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c,
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cover);
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}
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//--------------------------------------------------------------------
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AGG_INLINE void copy_hline(int x, int y,
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unsigned len,
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const color_type& c)
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
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do
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{
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*p = 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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AGG_INLINE void copy_vline(int x, int y,
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unsigned len,
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const color_type& c)
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{
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do
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
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*p = c.v;
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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,
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unsigned len,
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const color_type& c,
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agg::int8u /*cover*/)
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
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do
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{
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*p = c.v;
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p += Step;
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}
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while(--len);
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// We ignore alpha since grid_renderer is a binary renderer for now
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/*if (c.a)
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
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calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
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if(alpha == base_mask)
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{
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do
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{
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*p = 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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Blender::blend_pix(p, c.v, alpha, cover);
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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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//--------------------------------------------------------------------
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void blend_vline(int x, int y,
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unsigned len,
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const color_type& c,
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agg::int8u cover)
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{
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if (c.a)
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{
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value_type* p;
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calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
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if(alpha == base_mask)
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{
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do
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{
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p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
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*p = c.v;
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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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p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
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Blender::blend_pix(p, c.v, alpha, cover);
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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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//--------------------------------------------------------------------
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void blend_solid_hspan(int x, int y,
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unsigned len,
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const color_type& c,
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const agg::int8u* covers)
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{
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if (c.a)
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
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do
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{
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calc_type alpha = (calc_type(c.a) * (calc_type(*covers) + 1)) >> 8;
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if(alpha == base_mask)
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{
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*p = c.v;
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}
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else
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{
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Blender::blend_pix(p, c.v, alpha, *covers);
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}
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p += Step;
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++covers;
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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_solid_vspan(int x, int y,
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unsigned len,
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const color_type& c,
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const agg::int8u* covers)
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{
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if (c.a)
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{
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do
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{
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calc_type alpha = (calc_type(c.a) * (calc_type(*covers) + 1)) >> 8;
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
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if(alpha == base_mask)
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{
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*p = c.v;
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}
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else
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{
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Blender::blend_pix(p, c.v, alpha, *covers);
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}
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++covers;
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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_color_hspan(int x, int y,
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unsigned len,
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const color_type* colors)
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
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do
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{
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*p = colors->v;
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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 copy_color_vspan(int x, int y,
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unsigned len,
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const color_type* colors)
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{
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do
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
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*p = colors->v;
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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_hspan(int x, int y,
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unsigned len,
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const color_type* colors,
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const agg::int8u* covers,
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agg::int8u cover)
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y, len) + x * Step + Offset;
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if(covers)
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{
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do
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{
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copy_or_blend_pix(p, *colors++, *covers++);
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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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if(cover == 255)
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{
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do
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{
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if(colors->a == base_mask)
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{
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*p = colors->v;
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}
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else
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{
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copy_or_blend_pix(p, *colors);
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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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else
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{
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do
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{
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copy_or_blend_pix(p, *colors++, cover);
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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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|
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//--------------------------------------------------------------------
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void blend_color_vspan(int x, int y,
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unsigned len,
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const color_type* colors,
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const agg::int8u* covers,
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agg::int8u cover)
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{
|
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value_type* p;
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if(covers)
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{
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do
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{
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p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
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copy_or_blend_pix(p, *colors++, *covers++);
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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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if(cover == 255)
|
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{
|
|
do
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|
{
|
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p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
|
|
|
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if(colors->a == base_mask)
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{
|
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*p = colors->v;
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}
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else
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{
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copy_or_blend_pix(p, *colors);
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}
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++colors;
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}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
do
|
|
{
|
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p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x * Step + Offset;
|
|
|
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copy_or_blend_pix(p, *colors++, cover);
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}
|
|
while(--len);
|
|
}
|
|
}
|
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}
|
|
|
|
//--------------------------------------------------------------------
|
|
template <typename Function>
|
|
void for_each_pixel(Function f)
|
|
{
|
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for(unsigned y = 0; y < height(); ++y)
|
|
{
|
|
row_data r = m_rbuf->row(y);
|
|
if(r.ptr)
|
|
{
|
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unsigned len = r.x2 - r.x1 + 1;
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|
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value_type* p = (value_type*)
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m_rbuf->row_ptr(r.x1, y, len) + r.x1 * Step + Offset;
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do
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{
|
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f(p);
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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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|
|
|
//--------------------------------------------------------------------
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template<typename GammaLut> void apply_gamma_dir(const GammaLut& g)
|
|
{
|
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for_each_pixel(apply_gamma_dir_gray<color_type, GammaLut>(g));
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<typename GammaLut> void apply_gamma_inv(const GammaLut& g)
|
|
{
|
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for_each_pixel(apply_gamma_inv_gray<color_type, GammaLut>(g));
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<typename RenBuf2>
|
|
void copy_from(const RenBuf2& from,
|
|
int xdst, int ydst,
|
|
int xsrc, int ysrc,
|
|
unsigned len)
|
|
{
|
|
const agg::int8u* p = from.row_ptr(ysrc);
|
|
if(p)
|
|
{
|
|
memmove(m_rbuf->row_ptr(xdst, ydst, len) + xdst * pix_width,
|
|
p + xsrc * pix_width,
|
|
len * pix_width);
|
|
}
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<typename SrcPixelFormatRenderer>
|
|
void blend_from_color(const SrcPixelFormatRenderer& from,
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const color_type& color,
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int xdst, int ydst,
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int /*xsrc*/, int ysrc,
|
|
unsigned len,
|
|
agg::int8u cover)
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|
{
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|
using src_value_type = typename SrcPixelFormatRenderer::value_type;
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const src_value_type* psrc = (src_value_type*)from.row_ptr(ysrc);
|
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if(psrc)
|
|
{
|
|
value_type* pdst =
|
|
(value_type*)m_rbuf->row_ptr(xdst, ydst, len) + xdst;
|
|
do
|
|
{
|
|
copy_or_blend_pix(pdst,
|
|
color,
|
|
(*psrc * cover + base_mask) >> base_shift);
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|
++psrc;
|
|
++pdst;
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<typename SrcPixelFormatRenderer>
|
|
void blend_from_lut(const SrcPixelFormatRenderer& from,
|
|
const color_type* color_lut,
|
|
int xdst, int ydst,
|
|
int /*xsrc*/, int ysrc,
|
|
unsigned len,
|
|
agg::int8u cover)
|
|
{
|
|
using src_value_type = typename SrcPixelFormatRenderer::value_type;
|
|
const src_value_type* psrc = (src_value_type*)from.row_ptr(ysrc);
|
|
if(psrc)
|
|
{
|
|
value_type* pdst =
|
|
(value_type*)m_rbuf->row_ptr(xdst, ydst, len) + xdst;
|
|
do
|
|
{
|
|
copy_or_blend_pix(pdst, color_lut[*psrc], cover);
|
|
++psrc;
|
|
++pdst;
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
|
|
private:
|
|
rbuf_type* m_rbuf;
|
|
};
|
|
|
|
using blender_gray16 = blender_gray<gray16>;
|
|
|
|
using pixfmt_gray16 = pixfmt_alpha_blend_gray<blender_gray16,
|
|
mapnik::grid_rendering_buffer>; //----pixfmt_gray16
|
|
|
|
using blender_gray32 = blender_gray<gray32>;
|
|
|
|
using pixfmt_gray32 = pixfmt_alpha_blend_gray<blender_gray32,
|
|
mapnik::grid_rendering_buffer>; //----pixfmt_gray32
|
|
|
|
using blender_gray64 = blender_gray<gray64>;
|
|
|
|
using pixfmt_gray64 = pixfmt_alpha_blend_gray<blender_gray64,
|
|
mapnik::grid_rendering_buffer>; //----pixfmt_gray64
|
|
|
|
}
|
|
|
|
#endif
|