synfig-core/trunk/src/synfig/surface.cpp

   1 /* ========================================================================
   2 ** Sinfg
   3 ** Template File
   4 ** $Id: surface.cpp,v 1.1.1.1 2005/01/04 01:23:14 darco Exp $
   5 **
   6 ** Copyright (c) 2002 Robert B. Quattlebaum Jr.
   7 **
   8 ** This software and associated documentation
   9 ** are CONFIDENTIAL and PROPRIETARY property of
  10 ** the above-mentioned copyright holder.
  11 **
  12 ** You may not copy, print, publish, or in any
  13 ** other way distribute this software without
  14 ** a prior written agreement with
  15 ** the copyright holder.
  16 **
  17 ** === N O T E S ===========================================================
  18 **
  19 ** ========================================================================= */
  20
  21 /* === H E A D E R S ======================================================= */
  22
  23 #define SINFG_NO_ANGLE
  24
  25 #ifdef USING_PCH
  26 #       include "pch.h"
  27 #else
  28 #ifdef HAVE_CONFIG_H
  29 #       include <config.h>
  30 #endif
  31
  32 #include "canvas.h"
  33 #include "surface.h"
  34 #include "target_scanline.h"
  35 #include "general.h"
  36
  37 #ifdef HAS_VIMAGE
  38 #include <Accelerate/Accelerate.h>
  39 #endif
  40
  41 #endif
  42
  43 using namespace sinfg;
  44 using namespace std;
  45 using namespace etl;
  46
  47 /* === M A C R O S ========================================================= */
  48
  49 /* === G L O B A L S ======================================================= */
  50
  51 class target2surface : public sinfg::Target_Scanline
  52 {
  53 public:
  54         Surface *surface;
  55         bool     sized;
  56 public:
  57         target2surface(Surface *surface);
  58         virtual ~target2surface();
  59
  60         virtual bool set_rend_desc(sinfg::RendDesc *newdesc);
  61
  62         virtual bool start_frame(sinfg::ProgressCallback *cb);
  63
  64         virtual void end_frame();
  65
  66         virtual Color * start_scanline(int scanline);
  67
  68         virtual bool end_scanline();
  69 };
  70
  71 target2surface::target2surface(Surface *surface):surface(surface)
  72 {
  73 }
  74
  75 target2surface::~target2surface()
  76 {
  77 }
  78
  79 bool
  80 target2surface::set_rend_desc(sinfg::RendDesc *newdesc)
  81 {
  82         assert(newdesc);
  83         assert(surface);
  84         desc=*newdesc;
  85         return sinfg::Target_Scanline::set_rend_desc(newdesc);
  86 }
  87
  88 bool
  89 target2surface::start_frame(sinfg::ProgressCallback *cb)
  90 {
  91         if(surface->get_w() != desc.get_w() || surface->get_h() != desc.get_h())
  92         {
  93                 surface->set_wh(desc.get_w(),desc.get_h());
  94         }
  95         return true;
  96 }
  97
  98 void
  99 target2surface::end_frame()
 100 {
 101         return;
 102 }
 103
 104 Color *
 105 target2surface::start_scanline(int scanline)
 106 {
 107         return (*surface)[scanline];
 108 }
 109
 110 bool
 111 target2surface::end_scanline()
 112 {
 113         return true;
 114 }
 115
 116 /* === P R O C E D U R E S ================================================= */
 117
 118 /* === M E T H O D S ======================================================= */
 119
 120 Target_Scanline::Handle
 121 sinfg::surface_target(Surface *surface)
 122 {
 123         return Target_Scanline::Handle(new target2surface(surface));
 124 }
 125
 126 void
 127 sinfg::Surface::clear()
 128 {
 129 #ifdef HAS_VIMAGE
 130         fill(Color(0.5,0.5,0.5,0.0000001));
 131 #else
 132         etl::surface<Color, ColorAccumulator, ColorPrep>::clear();
 133 #endif
 134 }
 135
 136 void
 137 sinfg::Surface::blit_to(alpha_pen& pen, int x, int y, int w, int h)
 138 {
 139         static const float epsilon(0.00001);
 140         const float alpha(pen.get_alpha());
 141         if(     pen.get_blend_method()==Color::BLEND_STRAIGHT && fabs(alpha-1.0f)<epsilon )
 142         {
 143                 if(x>=get_w() || y>=get_w())
 144                         return;
 145
 146                 //clip source origin
 147                 if(x<0)
 148                 {
 149                         w+=x;   //decrease
 150                         x=0;
 151                 }
 152
 153                 if(y<0)
 154                 {
 155                         h+=y;   //decrease
 156                         y=0;
 157                 }
 158
 159                 //clip width against dest width
 160                 w = min(w,pen.end_x()-pen.x());
 161                 h = min(h,pen.end_y()-pen.y());
 162
 163                 //clip width against src width
 164                 w = min(w,get_w()-x);
 165                 h = min(h,get_h()-y);
 166
 167                 if(w<=0 || h<=0)
 168                         return;
 169
 170                 for(int i=0;i<h;i++)
 171                 {
 172                         char* src(static_cast<char*>(static_cast<void*>(operator[](y)+x))+i*get_w()*sizeof(Color));
 173                         char* dest(static_cast<char*>(static_cast<void*>(pen.x()))+i*pen.get_width()*sizeof(Color));
 174                         memcpy(dest,src,w*sizeof(Color));
 175                 }
 176                 return;
 177         }
 178
 179 #ifdef HAS_VIMAGE
 180         if(     pen.get_blend_method()==Color::BLEND_COMPOSITE && fabs(alpha-1.0f)<epsilon )
 181         {
 182                 if(x>=get_w() || y>=get_w())
 183                         return;
 184
 185                 //clip source origin
 186                 if(x<0)
 187                 {
 188                         //u-=x; //increase
 189                         w+=x;   //decrease
 190                         x=0;
 191                 }
 192
 193                 if(y<0)
 194                 {
 195                         //v-=y; //increase
 196                         h+=y;   //decrease
 197                         y=0;
 198                 }
 199
 200                 //clip width against dest width
 201                 w = min(w,pen.end_x()-pen.x());
 202                 h = min(h,pen.end_y()-pen.y());
 203
 204                 //clip width against src width
 205                 w = min(w,get_w()-x);
 206                 h = min(h,get_h()-y);
 207
 208                 if(w<=0 || h<=0)
 209                         return;
 210
 211
 212
 213                 vImage_Buffer top,bottom;
 214                 vImage_Buffer& dest(bottom);
 215
 216                 top.data=static_cast<void*>(operator[](y)+x);
 217                 top.height=h;
 218                 top.width=w;
 219                 //top.rowBytes=get_w()*sizeof(Color); //! \fixme this should get the pitch!!
 220                 top.rowBytes=get_pitch();
 221
 222                 bottom.data=static_cast<void*>(pen.x());
 223                 bottom.height=h;
 224                 bottom.width=w;
 225                 //bottom.rowBytes=pen.get_width()*sizeof(Color); //! \fixme this should get the pitch!!
 226                 bottom.rowBytes=pen.get_pitch(); //! \fixme this should get the pitch!!
 227
 228                 vImage_Error ret;
 229                 ret=vImageAlphaBlend_ARGBFFFF(&top,&bottom,&dest,kvImageNoFlags);
 230
 231                 assert(ret!=kvImageNoError);
 232
 233                 return;
 234         }
 235 #endif
 236         etl::surface<Color, ColorAccumulator, ColorPrep>::blit_to(pen,x,y,w,h);
 237 }
 238