Repo created

3party/agg/agg_pixfmt_amask_adaptor.h

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+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_PIXFMT_AMASK_ADAPTOR_INCLUDED
+#define AGG_PIXFMT_AMASK_ADAPTOR_INCLUDED
+
+
+#include <string.h>
+#include "agg_array.h"
+#include "agg_rendering_buffer.h"
+
+
+namespace agg
+{
+    //==================================================pixfmt_amask_adaptor
+    template<class PixFmt, class AlphaMask> class pixfmt_amask_adaptor
+    {
+    public:
+        typedef PixFmt pixfmt_type;
+        typedef typename pixfmt_type::color_type color_type;
+        typedef typename pixfmt_type::row_data row_data;
+        typedef AlphaMask amask_type;
+        typedef typename amask_type::cover_type cover_type;
+
+    private:
+        enum span_extra_tail_e { span_extra_tail = 256 };
+
+        void realloc_span(unsigned len)
+        {
+            if(len > m_span.size())
+            {
+                m_span.resize(len + span_extra_tail);
+            }
+        }
+
+        void init_span(unsigned len)
+        {
+            realloc_span(len);
+            memset(&m_span[0], amask_type::cover_full, len * sizeof(cover_type));
+        }
+
+        void init_span(unsigned len, const cover_type* covers)
+        {
+            realloc_span(len);
+            memcpy(&m_span[0], covers, len * sizeof(cover_type));
+        }
+
+
+    public:
+        pixfmt_amask_adaptor(pixfmt_type& pixf, const amask_type& mask) :
+            m_pixf(&pixf), m_mask(&mask), m_span()
+        {}
+
+        void attach_pixfmt(pixfmt_type& pixf)          { m_pixf = &pixf; }
+        void attach_alpha_mask(const amask_type& mask) { m_mask = &mask; }
+
+        //--------------------------------------------------------------------
+        template<class PixFmt2>
+        bool attach_pixfmt(PixFmt2& pixf, int x1, int y1, int x2, int y2)
+        {
+            return m_pixf->attach(pixf, x1, y1, x2, y2);
+        }
+
+        //--------------------------------------------------------------------
+        unsigned width()  const { return m_pixf->width();  }
+        unsigned height() const { return m_pixf->height(); }
+
+        //--------------------------------------------------------------------
+        color_type pixel(int x, int y)
+        {
+            return m_pixf->pixel(x, y);
+        }
+
+        //--------------------------------------------------------------------
+        void copy_pixel(int x, int y, const color_type& c)
+        {
+            m_pixf->blend_pixel(x, y, c, m_mask->pixel(x, y));
+        }
+
+        //--------------------------------------------------------------------
+        void blend_pixel(int x, int y, const color_type& c, cover_type cover)
+        {
+            m_pixf->blend_pixel(x, y, c, m_mask->combine_pixel(x, y, cover));
+        }
+
+        //--------------------------------------------------------------------
+        void copy_hline(int x, int y, 
+                        unsigned len, 
+                        const color_type& c)
+        {
+            realloc_span(len);
+            m_mask->fill_hspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_hspan(x, y, len, c, &m_span[0]);
+        }
+
+        //--------------------------------------------------------------------
+        void blend_hline(int x, int y,
+                         unsigned len, 
+                         const color_type& c,
+                         cover_type cover)
+        {
+            init_span(len);
+            m_mask->combine_hspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_hspan(x, y, len, c, &m_span[0]);
+        }
+
+        //--------------------------------------------------------------------
+        void copy_vline(int x, int y,
+                        unsigned len, 
+                        const color_type& c)
+        {
+            realloc_span(len);
+            m_mask->fill_vspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_vspan(x, y, len, c, &m_span[0]);
+        }
+
+        //--------------------------------------------------------------------
+        void blend_vline(int x, int y,
+                         unsigned len, 
+                         const color_type& c,
+                         cover_type cover)
+        {
+            init_span(len);
+            m_mask->combine_vspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_vspan(x, y, len, c, &m_span[0]);
+        }
+
+        //--------------------------------------------------------------------
+        void copy_from(const rendering_buffer& from, 
+                       int xdst, int ydst,
+                       int xsrc, int ysrc,
+                       unsigned len)
+        {
+            m_pixf->copy_from(from, xdst, ydst, xsrc, ysrc, len);
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_solid_hspan(int x, int y,
+                               unsigned len, 
+                               const color_type& c,
+                               const cover_type* covers)
+        {
+            init_span(len, covers);
+            m_mask->combine_hspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_hspan(x, y, len, c, &m_span[0]);
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_solid_vspan(int x, int y,
+                               unsigned len, 
+                               const color_type& c,
+                               const cover_type* covers)
+        {
+            init_span(len, covers);
+            m_mask->combine_vspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_vspan(x, y, len, c, &m_span[0]);
+        }
+
+
+        //--------------------------------------------------------------------
+        void copy_color_hspan(int x, int y, unsigned len, const color_type* colors)
+        {
+            realloc_span(len);
+            m_mask->fill_hspan(x, y, &m_span[0], len);
+            m_pixf->blend_color_hspan(x, y, len, colors, &m_span[0], cover_full);
+        }
+
+        //--------------------------------------------------------------------
+        void copy_color_vspan(int x, int y, unsigned len, const color_type* colors)
+        {
+            realloc_span(len);
+            m_mask->fill_vspan(x, y, &m_span[0], len);
+            m_pixf->blend_color_vspan(x, y, len, colors, &m_span[0], cover_full);
+        }
+
+        //--------------------------------------------------------------------
+        void blend_color_hspan(int x, int y,
+                               unsigned len, 
+                               const color_type* colors,
+                               const cover_type* covers,
+                               cover_type cover = cover_full)
+        {
+            if(covers) 
+            {
+                init_span(len, covers);
+                m_mask->combine_hspan(x, y, &m_span[0], len);
+            }
+            else
+            {
+                realloc_span(len);
+                m_mask->fill_hspan(x, y, &m_span[0], len);
+            }
+            m_pixf->blend_color_hspan(x, y, len, colors, &m_span[0], cover);
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_color_vspan(int x, int y,
+                               unsigned len, 
+                               const color_type* colors,
+                               const cover_type* covers,
+                               cover_type cover = cover_full)
+        {
+            if(covers) 
+            {
+                init_span(len, covers);
+                m_mask->combine_vspan(x, y, &m_span[0], len);
+            }
+            else
+            {
+                realloc_span(len);
+                m_mask->fill_vspan(x, y, &m_span[0], len);
+            }
+            m_pixf->blend_color_vspan(x, y, len, colors, &m_span[0], cover);
+        }
+
+    private:
+        pixfmt_type*          m_pixf;
+        const amask_type*     m_mask;
+        pod_array<cover_type> m_span;
+    };
+
+}
+
+#endif
+