synfig-core/src/synfig/surface.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file surface.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 **
  21 ** === N O T E S ===========================================================
  22 **
  23 ** ========================================================================= */
  24
  25 /* === H E A D E R S ======================================================= */
  26
  27 #ifdef USING_PCH
  28 #       include "pch.h"
  29 #else
  30 #ifdef HAVE_CONFIG_H
  31 #       include <config.h>
  32 #endif
  33
  34 #include "canvas.h"
  35 #include "surface.h"
  36 #include "target_scanline.h"
  37 #include "general.h"
  38
  39 #ifdef HAS_VIMAGE
  40 #include <Accelerate/Accelerate.h>
  41 #endif
  42
  43 #endif
  44
  45 using namespace synfig;
  46 using namespace std;
  47 using namespace etl;
  48
  49 /* === M A C R O S ========================================================= */
  50
  51 /* === G L O B A L S ======================================================= */
  52
  53 class target2surface : public synfig::Target_Scanline
  54 {
  55 public:
  56         Surface *surface;
  57         bool     sized;
  58 public:
  59         target2surface(Surface *surface);
  60         virtual ~target2surface();
  61
  62         virtual bool set_rend_desc(synfig::RendDesc *newdesc);
  63
  64         virtual bool start_frame(synfig::ProgressCallback *cb);
  65
  66         virtual void end_frame();
  67
  68         virtual Color * start_scanline(int scanline);
  69
  70         virtual bool end_scanline();
  71 };
  72
  73 target2surface::target2surface(Surface *surface):surface(surface)
  74 {
  75 }
  76
  77 target2surface::~target2surface()
  78 {
  79 }
  80
  81 bool
  82 target2surface::set_rend_desc(synfig::RendDesc *newdesc)
  83 {
  84         assert(newdesc);
  85         assert(surface);
  86         desc=*newdesc;
  87         return synfig::Target_Scanline::set_rend_desc(newdesc);
  88 }
  89
  90 bool
  91 target2surface::start_frame(synfig::ProgressCallback */*cb*/)
  92 {
  93         if(surface->get_w() != desc.get_w() || surface->get_h() != desc.get_h())
  94         {
  95                 surface->set_wh(desc.get_w(),desc.get_h());
  96         }
  97         return true;
  98 }
  99
 100 void
 101 target2surface::end_frame()
 102 {
 103         return;
 104 }
 105
 106 Color *
 107 target2surface::start_scanline(int scanline)
 108 {
 109         return (*surface)[scanline];
 110 }
 111
 112 bool
 113 target2surface::end_scanline()
 114 {
 115         return true;
 116 }
 117
 118 /* === P R O C E D U R E S ================================================= */
 119
 120 /* === M E T H O D S ======================================================= */
 121
 122 Target_Scanline::Handle
 123 synfig::surface_target(Surface *surface)
 124 {
 125         return Target_Scanline::Handle(new target2surface(surface));
 126 }
 127
 128 void
 129 synfig::Surface::clear()
 130 {
 131 #ifdef HAS_VIMAGE
 132         fill(Color(0.5,0.5,0.5,0.0000001));
 133 #else
 134         etl::surface<Color, ColorAccumulator, ColorPrep>::clear();
 135 #endif
 136 }
 137
 138 void
 139 synfig::Surface::blit_to(alpha_pen& pen, int x, int y, int w, int h)
 140 {
 141         static const float epsilon(0.00001);
 142         const float alpha(pen.get_alpha());
 143         if(     pen.get_blend_method()==Color::BLEND_STRAIGHT && fabs(alpha-1.0f)<epsilon )
 144         {
 145                 if(x>=get_w() || y>=get_w())
 146                         return;
 147
 148                 //clip source origin
 149                 if(x<0)
 150                 {
 151                         w+=x;   //decrease
 152                         x=0;
 153                 }
 154
 155                 if(y<0)
 156                 {
 157                         h+=y;   //decrease
 158                         y=0;
 159                 }
 160
 161                 //clip width against dest width
 162                 w = min((long)w,(long)(pen.end_x()-pen.x()));
 163                 h = min((long)h,(long)(pen.end_y()-pen.y()));
 164
 165                 //clip width against src width
 166                 w = min(w,get_w()-x);
 167                 h = min(h,get_h()-y);
 168
 169                 if(w<=0 || h<=0)
 170                         return;
 171
 172                 for(int i=0;i<h;i++)
 173                 {
 174                         char* src(static_cast<char*>(static_cast<void*>(operator[](y)+x))+i*get_w()*sizeof(Color));
 175                         char* dest(static_cast<char*>(static_cast<void*>(pen.x()))+i*pen.get_width()*sizeof(Color));
 176                         memcpy(dest,src,w*sizeof(Color));
 177                 }
 178                 return;
 179         }
 180
 181 #ifdef HAS_VIMAGE
 182         if(     pen.get_blend_method()==Color::BLEND_COMPOSITE && fabs(alpha-1.0f)<epsilon )
 183         {
 184                 if(x>=get_w() || y>=get_w())
 185                         return;
 186
 187                 //clip source origin
 188                 if(x<0)
 189                 {
 190                         //u-=x; //increase
 191                         w+=x;   //decrease
 192                         x=0;
 193                 }
 194
 195                 if(y<0)
 196                 {
 197                         //v-=y; //increase
 198                         h+=y;   //decrease
 199                         y=0;
 200                 }
 201
 202                 //clip width against dest width
 203                 w = min(w,pen.end_x()-pen.x());
 204                 h = min(h,pen.end_y()-pen.y());
 205
 206                 //clip width against src width
 207                 w = min(w,get_w()-x);
 208                 h = min(h,get_h()-y);
 209
 210                 if(w<=0 || h<=0)
 211                         return;
 212
 213
 214
 215                 vImage_Buffer top,bottom;
 216                 vImage_Buffer& dest(bottom);
 217
 218                 top.data=static_cast<void*>(operator[](y)+x);
 219                 top.height=h;
 220                 top.width=w;
 221                 //top.rowBytes=get_w()*sizeof(Color); //! \todo this should get the pitch!!
 222                 top.rowBytes=get_pitch();
 223
 224                 bottom.data=static_cast<void*>(pen.x());
 225                 bottom.height=h;
 226                 bottom.width=w;
 227                 //bottom.rowBytes=pen.get_width()*sizeof(Color); //! \todo this should get the pitch!!
 228                 bottom.rowBytes=pen.get_pitch(); //! \todo this should get the pitch!!
 229
 230                 vImage_Error ret;
 231                 ret=vImageAlphaBlend_ARGBFFFF(&top,&bottom,&dest,kvImageNoFlags);
 232
 233                 assert(ret!=kvImageNoError);
 234
 235                 return;
 236         }
 237 #endif
 238         etl::surface<Color, ColorAccumulator, ColorPrep>::blit_to(pen,x,y,w,h);
 239 }
 240