synfig-core/trunk/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 #define SYNFIG_NO_ANGLE
  28
  29 #ifdef USING_PCH
  30 #       include "pch.h"
  31 #else
  32 #ifdef HAVE_CONFIG_H
  33 #       include <config.h>
  34 #endif
  35
  36 #include "canvas.h"
  37 #include "surface.h"
  38 #include "target_scanline.h"
  39 #include "general.h"
  40
  41 #ifdef HAS_VIMAGE
  42 #include <Accelerate/Accelerate.h>
  43 #endif
  44
  45 #endif
  46
  47 using namespace synfig;
  48 using namespace std;
  49 using namespace etl;
  50
  51 /* === M A C R O S ========================================================= */
  52
  53 /* === G L O B A L S ======================================================= */
  54
  55 class target2surface : public synfig::Target_Scanline
  56 {
  57 public:
  58         Surface *surface;
  59         bool     sized;
  60 public:
  61         target2surface(Surface *surface);
  62         virtual ~target2surface();
  63
  64         virtual bool set_rend_desc(synfig::RendDesc *newdesc);
  65
  66         virtual bool start_frame(synfig::ProgressCallback *cb);
  67
  68         virtual void end_frame();
  69
  70         virtual Color * start_scanline(int scanline);
  71
  72         virtual bool end_scanline();
  73 };
  74
  75 target2surface::target2surface(Surface *surface):surface(surface)
  76 {
  77 }
  78
  79 target2surface::~target2surface()
  80 {
  81 }
  82
  83 bool
  84 target2surface::set_rend_desc(synfig::RendDesc *newdesc)
  85 {
  86         assert(newdesc);
  87         assert(surface);
  88         desc=*newdesc;
  89         return synfig::Target_Scanline::set_rend_desc(newdesc);
  90 }
  91
  92 bool
  93 target2surface::start_frame(synfig::ProgressCallback */*cb*/)
  94 {
  95         if(surface->get_w() != desc.get_w() || surface->get_h() != desc.get_h())
  96         {
  97                 surface->set_wh(desc.get_w(),desc.get_h());
  98         }
  99         return true;
 100 }
 101
 102 void
 103 target2surface::end_frame()
 104 {
 105         return;
 106 }
 107
 108 Color *
 109 target2surface::start_scanline(int scanline)
 110 {
 111         return (*surface)[scanline];
 112 }
 113
 114 bool
 115 target2surface::end_scanline()
 116 {
 117         return true;
 118 }
 119
 120 /* === P R O C E D U R E S ================================================= */
 121
 122 /* === M E T H O D S ======================================================= */
 123
 124 Target_Scanline::Handle
 125 synfig::surface_target(Surface *surface)
 126 {
 127         return Target_Scanline::Handle(new target2surface(surface));
 128 }
 129
 130 void
 131 synfig::Surface::clear()
 132 {
 133 #ifdef HAS_VIMAGE
 134         fill(Color(0.5,0.5,0.5,0.0000001));
 135 #else
 136         etl::surface<Color, ColorAccumulator, ColorPrep>::clear();
 137 #endif
 138 }
 139
 140 void
 141 synfig::Surface::blit_to(alpha_pen& pen, int x, int y, int w, int h)
 142 {
 143         static const float epsilon(0.00001);
 144         const float alpha(pen.get_alpha());
 145         if(     pen.get_blend_method()==Color::BLEND_STRAIGHT && fabs(alpha-1.0f)<epsilon )
 146         {
 147                 if(x>=get_w() || y>=get_w())
 148                         return;
 149
 150                 //clip source origin
 151                 if(x<0)
 152                 {
 153                         w+=x;   //decrease
 154                         x=0;
 155                 }
 156
 157                 if(y<0)
 158                 {
 159                         h+=y;   //decrease
 160                         y=0;
 161                 }
 162
 163                 //clip width against dest width
 164                 w = min((long)w,(long)(pen.end_x()-pen.x()));
 165                 h = min((long)h,(long)(pen.end_y()-pen.y()));
 166
 167                 //clip width against src width
 168                 w = min(w,get_w()-x);
 169                 h = min(h,get_h()-y);
 170
 171                 if(w<=0 || h<=0)
 172                         return;
 173
 174                 for(int i=0;i<h;i++)
 175                 {
 176                         char* src(static_cast<char*>(static_cast<void*>(operator[](y)+x))+i*get_w()*sizeof(Color));
 177                         char* dest(static_cast<char*>(static_cast<void*>(pen.x()))+i*pen.get_width()*sizeof(Color));
 178                         memcpy(dest,src,w*sizeof(Color));
 179                 }
 180                 return;
 181         }
 182
 183 #ifdef HAS_VIMAGE
 184         if(     pen.get_blend_method()==Color::BLEND_COMPOSITE && fabs(alpha-1.0f)<epsilon )
 185         {
 186                 if(x>=get_w() || y>=get_w())
 187                         return;
 188
 189                 //clip source origin
 190                 if(x<0)
 191                 {
 192                         //u-=x; //increase
 193                         w+=x;   //decrease
 194                         x=0;
 195                 }
 196
 197                 if(y<0)
 198                 {
 199                         //v-=y; //increase
 200                         h+=y;   //decrease
 201                         y=0;
 202                 }
 203
 204                 //clip width against dest width
 205                 w = min(w,pen.end_x()-pen.x());
 206                 h = min(h,pen.end_y()-pen.y());
 207
 208                 //clip width against src width
 209                 w = min(w,get_w()-x);
 210                 h = min(h,get_h()-y);
 211
 212                 if(w<=0 || h<=0)
 213                         return;
 214
 215
 216
 217                 vImage_Buffer top,bottom;
 218                 vImage_Buffer& dest(bottom);
 219
 220                 top.data=static_cast<void*>(operator[](y)+x);
 221                 top.height=h;
 222                 top.width=w;
 223                 //top.rowBytes=get_w()*sizeof(Color); //! \fixme this should get the pitch!!
 224                 top.rowBytes=get_pitch();
 225
 226                 bottom.data=static_cast<void*>(pen.x());
 227                 bottom.height=h;
 228                 bottom.width=w;
 229                 //bottom.rowBytes=pen.get_width()*sizeof(Color); //! \fixme this should get the pitch!!
 230                 bottom.rowBytes=pen.get_pitch(); //! \fixme this should get the pitch!!
 231
 232                 vImage_Error ret;
 233                 ret=vImageAlphaBlend_ARGBFFFF(&top,&bottom,&dest,kvImageNoFlags);
 234
 235                 assert(ret!=kvImageNoError);
 236
 237                 return;
 238         }
 239 #endif
 240         etl::surface<Color, ColorAccumulator, ColorPrep>::blit_to(pen,x,y,w,h);
 241 }
 242