Src/Gtk2/CanvasExperimental.cpp

   1 #include "../Common/Common.h"
   2
   3 #include <math.h>
   4 #include "Canvas.h"
   5 #include "DasherControl.h"
   6
   7 #include "../DasherCore/DasherTypes.h"
   8
   9 //#undef WITH_CAIRO
  10
  11 //#define IGNAS_NODRAW
  12 //#define IGNAS_RECTANGLE_PRINT
  13   #define IGNAS_DRAW_MAIN_RECTANGLES true
  14 //  #define IGNAS_NORECTANGLE_DRAW
  15 //  #define IGNAS_NOFONT_DRAW
  16 //#define IGNAS_FRAME_PRINT
  17 //#define IGNAS_NO_BLANK
  18
  19 #ifdef IGNAS_NODRAW
  20 #define IGNAS_STOP_VOID return;
  21 #endif
  22 #ifndef IGNAS_NODRAW
  23 #define IGNAS_STOP_VOID ;
  24 #endif
  25
  26 #ifdef IGNAS_NO_BLANK
  27 #define IGNAS_STOP_BLANK return;
  28 #endif
  29 #ifndef IGNAS_NO_BLANK
  30 #define IGNAS_STOP_BLANK ;
  31 #endif
  32
  33
  34 #ifdef IGNAS_NORECTANGLE_DRAW
  35 #define IGNAS_RECTANGLE_STOP_VOID return;
  36 #endif
  37 #ifndef IGNAS_NORECTANGLE_DRAW
  38 #define IGNAS_RECTANGLE_STOP_VOID ;
  39 #endif
  40 #ifdef IGNAS_NOFONT_DRAW
  41 #define IGNAS_FONT_STOP_VOID return;
  42 #endif
  43 #ifndef IGNAS_NOFONT_DRAW
  44 #define IGNAS_FONT_STOP_VOID ;
  45 #endif
  46 using namespace Dasher;
  47
  48 CCanvas::CCanvas(GtkWidget *pCanvas, CPangoCache *pPangoCache)
  49   : CDasherScreen(pCanvas->allocation.width, pCanvas->allocation.height) {
  50
  51   m_pCanvas = pCanvas;
  52   m_bLoadBackground = true;
  53   m_bCaptureBackground = true;
  54 ///IGNAS
  55
  56 #ifdef FRAMERATE_DIAGNOSTICS
  57 count_frames=0;
  58  lasttime=-1;
  59  count_time=0;
  60 total_frames=0;
  61  count_rectangles=0;
  62 #endif
  63
  64         display_depth=3;
  65         display_fontdepth=4;
  66         display_fontwidth=m_pCanvas->allocation.width;
  67         display_fontheight=m_pCanvas->allocation.height;
  68 ///IGNAS
  69
  70
  71 #if WITH_CAIRO
  72   cairo_colours = 0;
  73 #else
  74   colours = 0;
  75 #endif
  76
  77
  78   m_pPangoCache = pPangoCache;
  79
  80   m_iWidth = m_pCanvas->allocation.width;
  81   m_iHeight = m_pCanvas->allocation.height;
  82
  83         display_data= (guchar *) g_malloc(m_pCanvas->allocation.width*m_pCanvas->allocation.height*display_depth * sizeof(guchar));
  84         display_backgrounddata= (guchar *) g_malloc(m_pCanvas->allocation.width*m_pCanvas->allocation.height*display_depth * sizeof(guchar));
  85
  86 display_fontdata= (guchar *) g_malloc(display_fontwidth*display_fontheight*display_fontdepth * sizeof(guchar));
  87
  88
  89         point_id= (gint *) g_malloc(m_pCanvas->allocation.width * sizeof(gint));
  90         point_amount= (gint *) g_malloc(m_pCanvas->allocation.width * sizeof(gint));
  91         point_data= (gint *) g_malloc(m_pCanvas->allocation.width * sizeof(gint));
  92 GdkColor bg;
  93 GdkColor fg;
  94 bg.red=0;bg.green=0;bg.blue=0;
  95 fg=bg;
  96 display_pixbuf =gdk_pixbuf_new_from_data  (display_data,
  97                                              GDK_COLORSPACE_RGB,
  98                                              false, //no alpha
  99                                              8,
 100                                              m_pCanvas->allocation.width,
 101                                              m_pCanvas->allocation.height,
 102                                              m_pCanvas->allocation.width*display_depth,
 103                                              NULL,
 104                                              NULL);
 105
 106 #if WITH_CAIRO
 107 display_fontcairosurface=cairo_image_surface_create_for_data (display_fontdata,
 108                                                            CAIRO_FORMAT_RGB24,
 109                                                            display_fontwidth,display_fontheight,
 110                                                            display_fontwidth*display_fontdepth);
 111 display_fontcairo= cairo_create(display_fontcairosurface);
 112 #else
 113 //FONT FOR GDK
 114 display_fontgdk= gdk_pixmap_create_from_data (m_pCanvas->window,
 115                                              (gchar*)display_fontdata,
 116                                              m_iWidth,
 117                                              m_iHeight,
 118                                              24,
 119                                              &m_pCanvas->style->fg[GTK_STATE_NORMAL],
 120                                              &m_pCanvas->style->bg[GTK_STATE_NORMAL]);
 121
 122         gdk_drawable_set_colormap(display_fontgdk, gdk_colormap_get_system());
 123
 124  if (display_fontgdk==NULL)
 125         printf("No PIXMAP!!!\n");
 126
 127 #endif
 128
 129   m_pPangoInk = new PangoRectangle;
 130   gtk_widget_add_events(m_pCanvas, GDK_ALL_EVENTS_MASK);
 131 }
 132
 133 CCanvas::~CCanvas() {
 134   // Free the buffer pixmaps
 135
 136
 137   #if WITH_CAIRO
 138      cairo_destroy(display_fontcairo);
 139
 140   #else
 141      g_object_unref(display_fontgdk);
 142   #endif
 143   free(display_fontdata);
 144   free(display_backgrounddata);
 145   g_object_unref(display_pixbuf);
 146   free(display_data);
 147
 148   delete m_pPangoInk;
 149 }
 150
 151 void CCanvas::Blank() {
 152 //IGNAS_STOP_VOID
 153
 154   GdkColor _c;
 155
 156 #if WITH_CAIRO
 157         _c.red=(int)(cairo_colours[0].r*255);
 158         _c.green=(int)(cairo_colours[0].g*255);
 159         _c.blue=(int)(cairo_colours[0].b*255);
 160 #else
 161         _c.red=colours[0].red;
 162         _c.green=colours[0].green;
 163         _c.blue=colours[0].blue;
 164 #endif
 165
 166
 167   for(int i=0;i<m_iWidth*m_iHeight*display_depth;i+=display_depth)
 168         {
 169                 display_data[i]=_c.red;
 170                 display_data[i+1]=_c.green;
 171                 display_data[i+2]=_c.blue;
 172         }
 173
 174 }
 175
 176 void CCanvas::Display() {
 177
 178 //IGNAS_STOP_VOID
 179
 180   GdkGC *graphics_context;
 181
 182   graphics_context = m_pCanvas->style->fg_gc[GTK_WIDGET_STATE(m_pCanvas)];
 183
 184
 185   gdk_pixbuf_render_to_drawable(display_pixbuf,m_pCanvas->window, graphics_context,0, 0,0,0, m_iWidth,m_iHeight,  GDK_RGB_DITHER_NORMAL,0,0);
 186 }
 187
 188 void CCanvas::DrawRectangle(int x1, int y1, int x2, int y2, int Color, int iOutlineColour, Opts::ColorSchemes ColorScheme, bool bDrawOutline, bool bFill, int iThickness) {
 189 bFill&=IGNAS_DRAW_MAIN_RECTANGLES;
 190 IGNAS_RECTANGLE_STOP_VOID
 191 IGNAS_STOP_VOID
 192
 193 #ifdef FRAMERATE_DIAGNOSTICS
 194 ///IGNAS
 195   count_rectangles++;
 196 ///IGNAS
 197 #endif
 198
 199   GdkColor _c;
 200   int iLeft;
 201   int iTop;
 202   int iRight;
 203   int iBottom;
 204   int iWidth;
 205   int iHeight;
 206
 207   if( x2 > x1 ) {
 208     iLeft = x1;
 209     iWidth = x2 - x1;
 210   }
 211   else {
 212     iLeft = x2;
 213     iWidth = x1 - x2;
 214   }
 215
 216   if( y2 > y1 ) {
 217     iTop = y1;
 218     iHeight = y2 - y1;
 219   }
 220   else {
 221     iTop = y2;
 222     iHeight = y1 - y2;
 223   }
 224   iBottom=iTop+iHeight;
 225   if (iBottom> m_iHeight) iBottom=m_iHeight;
 226   iRight=iLeft+iWidth;
 227   if (iRight> m_iWidth) iRight=m_iWidth;
 228   if (iLeft<0) iLeft=0;
 229   if (iTop<0) iTop=0;
 230   if(bFill) {
 231 #if WITH_CAIRO
 232         _c.red=(int)(cairo_colours[Color].r*255);
 233         _c.green=(int)(cairo_colours[Color].g*255);
 234         _c.blue=(int)(cairo_colours[Color].b*255);
 235 #else
 236         _c.red=colours[Color].red;
 237         _c.green=colours[Color].green;
 238         _c.blue=colours[Color].blue;
 239 #endif
 240
 241     for (int i=iTop;i<iBottom;i++)
 242         for(int j=iLeft;j<iRight;j++)
 243         {
 244                 display_data[i*m_iWidth*display_depth+j*display_depth]=_c.red;
 245                 display_data[i*m_iWidth*display_depth+j*display_depth+1]=_c.green;
 246                 display_data[i*m_iWidth*display_depth+j*display_depth+2]=_c.blue;
 247         }
 248   }
 249
 250  if(bDrawOutline) {
 251     if( iOutlineColour == -1 )
 252     {
 253
 254
 255 #if WITH_CAIRO
 256         _c.red=(int)(cairo_colours[3].r*255);
 257         _c.green=(int)(cairo_colours[3].g*255);
 258         _c.blue=(int)(cairo_colours[3].b*255);
 259 #else
 260         _c.red=colours[3].red;
 261         _c.green=colours[3].green;
 262         _c.blue=colours[3].blue;
 263 #endif
 264
 265     }
 266     else
 267 {
 268
 269
 270  #if WITH_CAIRO
 271         _c.red=(int)(cairo_colours[iOutlineColour].r*255);
 272         _c.green=(int)(cairo_colours[iOutlineColour].g*255);
 273         _c.blue=(int)(cairo_colours[iOutlineColour].b*255);
 274 #else
 275         _c.red=colours[iOutlineColour].red;
 276         _c.green=colours[iOutlineColour].green;
 277         _c.blue=colours[iOutlineColour].blue;
 278 #endif
 279
 280 }
 281
 282         int i=0,j=0;
 283         for(int thickness=0;thickness<iThickness;thickness++)
 284         {
 285                 if (iLeft+thickness<m_iWidth)
 286                 for (i=iTop;i<iBottom;i++)
 287                 {
 288
 289
 290                         display_data[i*m_iWidth*display_depth+(iLeft+thickness)*display_depth]=_c.red;
 291                         display_data[i*m_iWidth*display_depth+(iLeft+thickness)*display_depth+1]=_c.green;
 292                         display_data[i*m_iWidth*display_depth+(iLeft+thickness)*display_depth+2]=_c.blue;
 293
 294                 }
 295                 if ((iRight-thickness>=0)&&(iRight-thickness<m_iWidth))
 296                 for (i=iTop;i<iBottom;i++)
 297                 {
 298                         display_data[i*m_iWidth*display_depth+(iLeft+iWidth-thickness)*display_depth]=_c.red;
 299                         display_data[i*m_iWidth*display_depth+(iLeft+iWidth-thickness)*display_depth+1]=_c.green;
 300                         display_data[i*m_iWidth*display_depth+(iLeft+iWidth-thickness)*display_depth+2]=_c.blue;
 301
 302                 }
 303                 if (iTop+thickness<m_iHeight)
 304                 for(j=iLeft;j<iRight;j++)
 305
 306                 {
 307                         display_data[(iTop+thickness)*m_iWidth*display_depth+j*display_depth]=_c.red;
 308                         display_data[(iTop+thickness)*m_iWidth*display_depth+j*display_depth+1]=_c.green;
 309                         display_data[(iTop+thickness)*m_iWidth*display_depth+j*display_depth+2]=_c.blue;
 310                 }
 311                 if ((iBottom-thickness<m_iHeight)&&(iBottom-thickness>=0))
 312                 for(j=iLeft;j<iRight;j++)
 313
 314                         display_data[(iTop+iHeight-thickness)*m_iWidth*display_depth+j*display_depth]=_c.red;
 315                         display_data[(iTop+iHeight-thickness)*m_iWidth*display_depth+j*display_depth+1]=_c.green;
 316                         display_data[(iTop+iHeight-thickness)*m_iWidth*display_depth+j*display_depth+2]=_c.blue;
 317                 }
 318         }
 319
 320
 321 }
 322
 323 void CCanvas::CirclePoints(int cx, int cy, int x, int y, int Colour,int iWidth)
 324     {
 325         //A circle drawing algorithm taken from
 326         //http://www.cs.unc.edu/~mcmillan/comp136/
 327
 328         GdkColor _c;
 329 #if WITH_CAIRO
 330         _c.red=(int)(cairo_colours[Colour].r*255);
 331         _c.green=(int)(cairo_colours[Colour].g*255);
 332         _c.blue=(int)(cairo_colours[Colour].b*255);
 333 #else
 334         _c.red=colours[Colour].red;
 335         _c.green=colours[Colour].green;
 336         _c.blue=colours[Colour].blue;
 337 #endif
 338
 339         if (x == 0) {
 340             SetPixel(&_c, cx, cy + y,iWidth); //act
 341             SetPixel(&_c, cx, cy - y,iWidth);
 342             SetPixel(&_c, cx + y, cy,iWidth);
 343             SetPixel(&_c, cx - y, cy,iWidth);
 344
 345         } else
 346         if (x == y) {
 347             SetPixel(&_c, cx + x, cy + y,iWidth);//act
 348             SetPixel(&_c, cx - x, cy + y,iWidth);
 349             SetPixel(&_c, cx + x, cy - y,iWidth);
 350             SetPixel(&_c, cx - x, cy - y,iWidth);
 351         } else
 352         if (x < y) {
 353             SetPixel(&_c, cx + x, cy + y,iWidth);//act
 354             SetPixel(&_c, cx - x, cy + y,iWidth);
 355             SetPixel(&_c, cx + x, cy - y,iWidth);
 356             SetPixel(&_c, cx - x, cy - y,iWidth);
 357             SetPixel(&_c, cx + y, cy + x,iWidth);
 358             SetPixel(&_c, cx - y, cy + x,iWidth);
 359             SetPixel(&_c, cx + y, cy - x,iWidth);
 360             SetPixel(&_c, cx - y, cy - x,iWidth);
 361         }
 362     }
 363 void CCanvas::HVThinLine(int x0,int y0,int x1,int y1,int Colour)
 364 {
 365         GdkColor _c;
 366 #if WITH_CAIRO
 367         _c.red=(int)(cairo_colours[Colour].r*255);
 368         _c.green=(int)(cairo_colours[Colour].g*255);
 369         _c.blue=(int)(cairo_colours[Colour].b*255);
 370 #else
 371         _c.red=colours[Colour].red;
 372         _c.green=colours[Colour].green;
 373         _c.blue=colours[Colour].blue;
 374 #endif
 375         int start,end,x,y;
 376         if (x0!=x1)
 377         {
 378                 if (x0<x1)
 379                 {
 380                         start=x0;
 381                         end=x1;
 382                 }
 383                 else
 384                 {
 385                         start = x1;
 386                         end=x0;
 387                 }
 388                 if (start<0) start =0;
 389                 if (start>=m_iWidth) start =m_iWidth-1;
 390
 391                 if ((y0>=0)&&(y0<m_iHeight))
 392                         for(x=start;x<end;x++)
 393                         {
 394                                 display_data[y0*m_iWidth*display_depth+x*display_depth]=_c.red;
 395                                 display_data[y0*m_iWidth*display_depth+x*display_depth+1]=_c.green;
 396                                 display_data[y0*m_iWidth*display_depth+x*display_depth+2]=_c.blue;
 397                         }
 398
 399
 400         }
 401         else
 402         {
 403                 if (y0<y1)
 404                 {
 405                         start=y0;
 406                         end=y1;
 407                 }
 408                 else
 409                 {
 410                         start = y1;
 411                         end=y0;
 412                 }
 413                 if (start<0) start =0;
 414                 if (start>=m_iHeight) start =m_iHeight-1;
 415
 416                 if ((x0>=0)&&(x0<m_iWidth))
 417                         for(y=start;y<end;y++)
 418                         {
 419                                 display_data[y*m_iWidth*display_depth+x0*display_depth]=_c.red;
 420                                 display_data[y*m_iWidth*display_depth+x0*display_depth+1]=_c.green;
 421                                 display_data[y*m_iWidth*display_depth+x0*display_depth+2]=_c.blue;
 422                         }
 423
 424
 425         }
 426 }
 427 void CCanvas::CircleMidpoint(int xCenter, int yCenter, int radius, int Colour,int iWidth)
 428 {
 429         int x,y,p;
 430         x = 0;
 431         y = radius;
 432         p = (5 - radius*4)/4;
 433         CirclePoints(xCenter, yCenter, x,y, Colour,iWidth);
 434         while (x < y) {
 435             x++;
 436             if (p < 0) {
 437                 p += 2*x+1;
 438             } else {
 439                 y--;
 440                 p += 2*(x-y)+1;
 441             }
 442            CirclePoints(xCenter, yCenter, x, y, Colour,iWidth);
 443
 444         }
 445     }
 446 void CCanvas::CircleFill(int xCenter,int yCenter,int radius,int Colour)
 447 {
 448         GdkColor _c;
 449 #if WITH_CAIRO
 450         _c.red=(int)(cairo_colours[Colour].r*255);
 451         _c.green=(int)(cairo_colours[Colour].g*255);
 452         _c.blue=(int)(cairo_colours[Colour].b*255);
 453 #else
 454         _c.red=colours[Colour].red;
 455         _c.green=colours[Colour].green;
 456         _c.blue=colours[Colour].blue;
 457 #endif
 458     int x = 0;
 459     int y = radius;
 460     int p = (5 - radius*4)/4;
 461
 462     while (x < y) {
 463        x++;
 464        if (p < 0) {
 465                 p += 2*x+1;
 466             } else {
 467                 y--;
 468                 p += 2*(x-y)+1;
 469             }
 470
 471             HVThinLine(xCenter-x,yCenter-y,xCenter-x,yCenter+y,Colour);
 472             HVThinLine(xCenter+x,yCenter-y,xCenter+x,yCenter+y,Colour);
 473             HVThinLine(xCenter-y,yCenter-x,xCenter-y,yCenter+x,Colour);
 474             HVThinLine(xCenter+y,yCenter-x,xCenter+y,yCenter+x,Colour);
 475       }
 476 }
 477 void CCanvas::DrawCircle(screenint iCX, screenint iCY, screenint iR, int iColour, int iFillColour, int iThickness, bool bFill) {
 478
 479
 480   if (bFill)
 481         CircleFill(iCX,iCY,iR,iFillColour);
 482   CircleMidpoint(iCX,iCY,iR,iColour,iThickness);
 483 }
 484 bool CCanvas::HorizontalIntersectionPoint(int h,int a,int b,int x0,int y0,int x1,int y1, int *p)
 485 {
 486         if (x0==x1) return false;
 487         if (((h>y0)&&(h>y1))||((h<y0)&&(h<y1))) return false;
 488         int t;
 489         if (x0>x1)
 490         {
 491                 t=x0;
 492                 x0=x1;
 493                 x1=t;
 494                 t=y0;
 495                 y0=y1;
 496                 y1=t;
 497         }
 498         int x;
 499         double l;
 500         int h1 = y0-h;
 501         int h2 = y1-h;
 502         if (h1<0) h1=-h1;
 503         if (h2<0) h2=-h2;
 504         int X = x1-x0;
 505         if (X<0) X = -X;
 506         if (X==0)
 507         {
 508
 509                 if ((x0>=a)&&(x0<=b)) *p=x0;
 510                 else
 511                 {
 512                         if (x0<a) *p=a; else *p=b;
 513                 }
 514                 return true;
 515         }
 516         if (h1 == 0)
 517         {
 518                 if ((x0>=a)&&(x0<=b)) *p=x0;
 519                 else
 520                 {
 521                         if (x0<a) *p=a; else *p=b;
 522                 }
 523                 return true;
 524         }
 525         else
 526         {
 527                 if (h2==0)
 528                 {
 529                         if ((x1>=a)&&(x1<=b)) *p=x1;
 530                         else
 531                         {
 532                                 if (x1<a) *p=a; else *p=b;
 533                         }
 534                         return true;
 535                 }
 536                 else
 537                 {
 538                         l = (double)(h2 * X)/(double)(h1+h2);
 539                         x = int (x1-l);
 540                         if ((x>=a)&&(x<=b)) *p=x;
 541                         else
 542                         {
 543                                 if (x<a) *p=a; else *p=b;
 544                         }
 545                         return true;
 546                 }
 547         }
 548
 549 }
 550 void CCanvas::PolygonFill(Dasher::CDasherScreen::point *Points, int Number, int Colour)
 551 {
 552         GdkColor _c;
 553 #if WITH_CAIRO
 554         _c.red=(int)(cairo_colours[Colour].r*255);
 555         _c.green=(int)(cairo_colours[Colour].g*255);
 556         _c.blue=(int)(cairo_colours[Colour].b*255);
 557 #else
 558         _c.red=colours[Colour].red;
 559         _c.green=colours[Colour].green;
 560         _c.blue=colours[Colour].blue;
 561 #endif
 562         if (Number>m_iWidth) return; //The size of point_data
 563         int minx=m_iWidth-1,maxx=0,miny=m_iHeight-1,maxy=0;
 564         int i;
 565         for (i=0;i<Number;i++)
 566         {
 567                 if (Points[i].x<minx) minx = Points[i].x;
 568                 if (Points[i].x>maxx) maxx = Points[i].x;
 569                 if (Points[i].y<miny) miny = Points[i].y;
 570                 if (Points[i].y>maxy) maxy = Points[i].y;
 571         }
 572         if (minx<0) minx=0;
 573         if (miny<0) miny=0;
 574         if (maxx>=m_iWidth) maxx=m_iWidth-1;
 575         if (maxy>=m_iHeight) maxy=m_iHeight-1;
 576         int p;
 577         int depth;
 578         for (i=0;i<m_iWidth;i++)
 579                 point_id[i]=-1;
 580         for(int scanline=miny;scanline<=maxy;scanline++)
 581         {
 582                 int found=-1;
 583                 for(i=1;i<Number;i++)
 584                 {
 585                         if (HorizontalIntersectionPoint(scanline,0,m_iWidth-1,Points[i-1].x,Points[i-1].y,Points[i].x,Points[i].y,&p))
 586                         {
 587                                 found++;
 588                                 point_data[found]=p;
 589                         }
 590                 }
 591                 if (HorizontalIntersectionPoint(scanline,0,m_iWidth-1,Points[Number-1].x,Points[Number-1].y,Points[0].x,Points[0].y,&p))
 592                         {
 593                                 found++;
 594                                 point_data[found]=p;
 595                         }
 596                 for (i=0;i<found;i++)
 597                 {
 598                         if (point_id[point_data[i]]!=scanline)
 599                         {
 600                                 point_amount[point_data[i]]=1;
 601                                 point_id[point_data[i]]=scanline;
 602                         }
 603                             else point_amount[point_data[i]]++;
 604                 }
 605                 depth=0;
 606                 for (i=0;i<m_iWidth;i++)
 607                 {
 608                         if (point_id[i]!=scanline)
 609                         {
 610                                 if (depth%2==1)
 611                                 {
 612                                         display_data[scanline*m_iWidth*display_depth+i*display_depth]=_c.red;
 613                                         display_data[scanline*m_iWidth*display_depth+i*display_depth+1]=_c.green;
 614                                         display_data[scanline*m_iWidth*display_depth+i*display_depth]=_c.blue;
 615                                 }
 616                         }
 617                         else
 618                         {
 619                                 depth+=point_amount[i];
 620                         }
 621                 }
 622         }
 623 }
 624 void CCanvas::Polygon(Dasher::CDasherScreen::point *Points, int Number, int Colour, int iWidth) {
 625 IGNAS_STOP_VOID
 626
 627   for(int i = 1; i < Number; i++)
 628   {
 629       Line(Points[i].x,Points[i].y,Points[i-1].x,Points[i-1].y, iWidth,Colour);
 630   }
 631   Line(Points[Number-1].x,Points[Number-1].y,Points[0].x,Points[0].y,iWidth,Colour);
 632 }
 633 void CCanvas::SetPixel(GdkColor *c,int x,int y,int iWidth)
 634 {
 635
 636    int x0=x,y0=y;
 637    for (int i=0;i<iWidth;i++)
 638    for (int j=0;j<iWidth;j++)
 639    {
 640
 641            x=x0+i-iWidth/2;
 642            y=y0+j-iWidth/2;
 643            if (((y>=0)&&(y<m_iHeight))&&((x>=0)&&(x<m_iWidth)))
 644            {
 645
 646                    display_data[y*m_iWidth*display_depth+x*display_depth]=c->red;
 647                    display_data[y*m_iWidth*display_depth+x*display_depth+1]=c->green;
 648                    display_data[y*m_iWidth*display_depth+x*display_depth+2]=c->blue;
 649            }
 650
 651
 652    }
 653
 654 }
 655
 656
 657 void CCanvas::Line(int x0,int y0,int x1,int y1,int iWidth, int Colour)
 658 {
 659 //A Bresenham line drawing algorithm taken from
 660 //http://www.cs.unc.edu/~mcmillan/comp136/Lecture6/Lines.html
 661
 662         GdkColor _c;
 663 #if WITH_CAIRO
 664         _c.red=(int)(cairo_colours[Colour].r*255);
 665         _c.green=(int)(cairo_colours[Colour].g*255);
 666         _c.blue=(int)(cairo_colours[Colour].b*255);
 667 #else
 668         _c.red=colours[Colour].red;
 669         _c.green=colours[Colour].green;
 670         _c.blue=colours[Colour].blue;
 671 #endif
 672         int dy = y1 - y0;
 673         int dx = x1 - x0;
 674         int stepx, stepy;
 675
 676         if (dy < 0) { dy = -dy;  stepy = -1; } else { stepy = 1; }
 677         if (dx < 0) { dx = -dx;  stepx = -1; } else { stepx = 1; }
 678         dy <<= 1;                                                  // dy is now 2*dy
 679         dx <<= 1;                                                  // dx is now 2*dx
 680
 681         SetPixel(&_c, x0, y0,iWidth);
 682         if (dx > dy) {
 683             int fraction = dy - (dx >> 1);                         // same as 2*dy - dx
 684             while (x0 != x1) {
 685                 if (fraction >= 0) {
 686                     y0 += stepy;
 687                     fraction -= dx;                                // same as fraction -= 2*dx
 688                 }
 689                 x0 += stepx;
 690                 fraction += dy;                                    // same as fraction -= 2*dy
 691                 SetPixel(&_c, x0, y0,iWidth);
 692             }
 693         } else {
 694             int fraction = dx - (dy >> 1);
 695             while (y0 != y1) {
 696                 if (fraction >= 0) {
 697                     x0 += stepx;
 698                     fraction -= dy;
 699                 }
 700                 y0 += stepy;
 701                 fraction += dx;
 702                 SetPixel(&_c, x0, y0,iWidth);
 703             }
 704         }
 705
 706
 707 }
 708 void CCanvas::Polyline(Dasher::CDasherScreen::point *Points, int Number, int iWidth, int Colour) {
 709
 710 IGNAS_STOP_VOID
 711
 712
 713
 714   for(int i = 1; i < Number; i++)
 715   {
 716       Line(Points[i].x,Points[i].y,Points[i-1].x,Points[i-1].y, iWidth,Colour);
 717   }
 718 }
 719
 720 void CCanvas::DrawString(const std::string &String, int x1, int y1, int size) {
 721 IGNAS_FONT_STOP_VOID
 722 IGNAS_STOP_VOID
 723
 724
 725 #if WITH_CAIRO  //set color black
 726     my_cairo_colour_t _c = cairo_colours[4];
 727     cairo_set_source_rgb(display_fontcairo, _c.r, _c.g, _c.b);
 728
 729 #else
 730         GdkGC *graphics_context;
 731        graphics_context = m_pCanvas->style->fg_gc[GTK_WIDGET_STATE(m_pCanvas)];
 732 #endif //WITH_CAIRO
 733
 734 #if WITH_CAIRO
 735   PangoLayout *pLayout(m_pPangoCache->GetLayout(display_fontcairo, String, size));
 736 #else
 737
 738   PangoLayout *pLayout(m_pPangoCache->GetLayout(GTK_WIDGET(m_pCanvas), String, size));
 739
 740 #endif
 741
 742
 743
 744   pango_layout_get_pixel_extents(pLayout, m_pPangoInk, NULL);
 745
 746    int height=m_pPangoInk->height/2;
 747  guchar back=255;
 748  int value,black;
 749  double alpha;
 750   for (int i=m_pPangoInk->y;i<m_pPangoInk->y+m_pPangoInk->height;i++)
 751     if ((i+y1-height<m_iHeight) &&(i+y1-height>=0))
 752         for(int j=m_pPangoInk->x;j<+m_pPangoInk->x+m_pPangoInk->width;j++)
 753         if ((j+x1>=0)&&(j+x1<m_iWidth))
 754         {
 755                 display_fontdata[i*display_fontwidth*display_fontdepth+j*display_fontdepth]=back;
 756                 display_fontdata[i*display_fontwidth*display_fontdepth+j*display_fontdepth+1]=back;
 757                 display_fontdata[i*display_fontwidth*display_fontdepth+j*display_fontdepth+2]=back;
 758         }
 759
 760 #if WITH_CAIRO
 761   pango_cairo_show_layout(display_fontcairo, pLayout);
 762 #else
 763
 764   GdkColormap* colormap=gdk_colormap_get_system();
 765   GdkColor _c = colours[4];
 766     gdk_colormap_alloc_color(colormap, &_c, FALSE, TRUE);
 767     gdk_gc_set_foreground (graphics_context, &_c);
 768   gdk_draw_layout(display_fontgdk, graphics_context, 0,0, pLayout);
 769
 770 #endif
 771
 772
 773   for (int i=m_pPangoInk->y;i<m_pPangoInk->y+m_pPangoInk->height;i++)
 774         if ((i+y1-height<m_iHeight) &&(i+y1-height>=0))
 775   {
 776         for(int j=m_pPangoInk->x;j<+m_pPangoInk->x+m_pPangoInk->width;j++)
 777         if ((j+x1>=0)&&(j+x1<m_iWidth))
 778         {
 779                 if (display_fontdata[i*display_fontwidth*display_fontdepth+j*display_fontdepth+0]!=back)
 780 {
 781         value = display_fontdata[i*display_fontwidth*display_fontdepth+j*display_fontdepth+0];
 782         alpha =(double)value/256.0;
 783         black = (int )(value * (1-alpha));
 784
 785 display_data[(i+y1-height)*m_iWidth*display_depth+(j+x1)*display_depth]=int (display_data[(i+y1-height)*m_iWidth*display_depth+(j+x1)*display_depth]*alpha)+black;
 786
 787 display_data[(i+y1-height)*m_iWidth*display_depth+(j+x1)*display_depth+1]=int (display_data[(i+y1-height)*m_iWidth*display_depth+(j+x1)*display_depth+1]*alpha)+black;
 788
 789 display_data[(i+y1-height)*m_iWidth*display_depth+(j+x1)*display_depth+2]=int (display_data[(i+y1-height)*m_iWidth*display_depth+(j+x1)*display_depth+2]*alpha)+black;
 790
 791 }
 792         }
 793
 794   }
 795 }
 796
 797 void CCanvas::TextSize(const std::string &String, int *Width, int *Height, int size) {
 798
 799 #if WITH_CAIRO
 800   PangoLayout *pLayout(m_pPangoCache->GetLayout(display_fontcairo, String, size));
 801 #else
 802   PangoLayout *pLayout(m_pPangoCache->GetLayout(GTK_WIDGET(m_pCanvas), String, size));
 803 #endif
 804   pango_layout_get_pixel_extents(pLayout, m_pPangoInk, NULL);
 805
 806   *Width = m_pPangoInk->width;
 807   *Height = m_pPangoInk->height;
 808
 809 }
 810
 811 void CCanvas::SendMarker(int iMarker) {
 812   switch(iMarker) {
 813   case 0: // Switch to display buffer
 814     break;
 815   case 1: // Switch to decorations buffer
 816     StoreBackground();
 817     LoadBackground();
 818 #ifdef FRAMERATE_DIAGNOSTICS
 819     NewFrame();
 820 #endif
 821     break;
 822   }
 823 }
 824
 825 void CCanvas::SetColourScheme(const CColourIO::ColourInfo *pColourScheme) {
 826   int iNumColours(pColourScheme->Reds.size());
 827
 828 #if WITH_CAIRO
 829   if (cairo_colours)
 830     delete[] cairo_colours;
 831   cairo_colours = new my_cairo_colour_t[iNumColours];
 832 #else
 833   if (colours)
 834     delete[] colours;
 835   colours = new GdkColor[iNumColours];
 836 #endif
 837
 838   for(int i = 0; i < iNumColours; i++) {
 839 #if WITH_CAIRO
 840     cairo_colours[i].r = pColourScheme->Reds[i] / 255.0;
 841     cairo_colours[i].g = pColourScheme->Greens[i] / 255.0;
 842     cairo_colours[i].b = pColourScheme->Blues[i] / 255.0;
 843 #else
 844     colours[i].pixel=0;
 845     colours[i].red=pColourScheme->Reds[i]*257;
 846     colours[i].green=pColourScheme->Greens[i]*257;
 847     colours[i].blue=pColourScheme->Blues[i]*257;
 848 #endif
 849   }
 850 }
 851 void CCanvas::SetLoadBackground(bool value)
 852 {
 853         m_bLoadBackground=value;
 854 }
 855 void CCanvas::SetCaptureBackground(bool value)
 856 {
 857         m_bCaptureBackground=value;
 858 }
 859 void CCanvas::StoreBackground()
 860 {
 861   if (m_bCaptureBackground)
 862     {
 863       for (int i=0;i<m_iWidth*m_iHeight*display_depth;i++)
 864         display_backgrounddata[i]=display_data[i];
 865       m_bCaptureBackground=false;
 866     }
 867 }
 868
 869 void CCanvas::LoadBackground()
 870 {
 871         if (m_bLoadBackground)
 872         {
 873                 for (int i=0;i<m_iWidth*m_iHeight*display_depth;i++)
 874                         display_data[i]=display_backgrounddata[i];
 875         }
 876
 877 }
 878
 879 bool CCanvas::GetCanvasSize(GdkRectangle *pRectangle)
 880 {
 881   if ((pRectangle == NULL) || (m_pCanvas == NULL))
 882     return false;
 883
 884   // Using gtk_window_get_frame_extents() only seems to return the position
 885   // and size of the parent Dasher window.  So we'll get the widgets position
 886   // and use its size to determine the bounding rectangle.
 887   int iX = 0;
 888   int iY = 0;
 889
 890   gdk_window_get_position(m_pCanvas->window, &iX, &iY);
 891
 892   pRectangle->x       = iX;
 893   pRectangle->y       = iY;
 894   pRectangle->width   = m_iWidth;
 895   pRectangle->height  = m_iHeight;
 896
 897   return true;
 898 }
 899 void CCanvas::ChangeState(int value)
 900 {
 901
 902 }
 903
 904 #ifdef FRAMERATE_DIAGNOSTICS
 905 void CCanvas::NewFrame()
 906 {
 907         count_frames++;
 908         time_t seconds=time(NULL);
 909         float average=0;
 910         if (lasttime==-1) lasttime=seconds;
 911         time_t temp=seconds-lasttime;
 912
 913         if (temp>=1)
 914         {
 915                 count_time += temp;
 916                 if (count_time!=1)
 917                 {
 918                         total_frames+=count_frames;
 919                         average=(float)total_frames/(float)(count_time-1);
 920                 }
 921                 printf("New second %ld had %d frames, the averages is %f, total frames=%ld\n ",count_time,count_frames,average,total_frames);
 922                 count_frames=0;
 923         }
 924 #ifdef IGNAS_FRAME_PRINT
 925         printf("OLD FRAME%d\n",count_rectangles);
 926 #endif
 927         count_rectangles=0;
 928         lasttime=seconds;
 929
 930 }
 931
 932 #endif