git.maemo.org Git - presencevnc/blob - libvnc/libvncserver/draw.c

   1 #include <rfb/rfb.h>
   2
   3 void rfbFillRect(rfbScreenInfoPtr s,int x1,int y1,int x2,int y2,rfbPixel col)
   4 {
   5   int rowstride = s->paddedWidthInBytes, bpp = s->bitsPerPixel>>3;
   6   int i,j;
   7   char* colour=(char*)&col;
   8
   9    if(!rfbEndianTest)
  10     colour += 4-bpp;
  11   for(j=y1;j<y2;j++)
  12     for(i=x1;i<x2;i++)
  13       memcpy(s->frameBuffer+j*rowstride+i*bpp,colour,bpp);
  14   rfbMarkRectAsModified(s,x1,y1,x2,y2);
  15 }
  16
  17 #define SETPIXEL(x,y) \
  18   memcpy(s->frameBuffer+(y)*rowstride+(x)*bpp,colour,bpp)
  19
  20 void rfbDrawPixel(rfbScreenInfoPtr s,int x,int y,rfbPixel col)
  21 {
  22   int rowstride = s->paddedWidthInBytes, bpp = s->bitsPerPixel>>3;
  23   char* colour=(char*)&col;
  24
  25   if(!rfbEndianTest)
  26     colour += 4-bpp;
  27   SETPIXEL(x,y);
  28   rfbMarkRectAsModified(s,x,y,x+1,y+1);
  29 }
  30
  31 void rfbDrawLine(rfbScreenInfoPtr s,int x1,int y1,int x2,int y2,rfbPixel col)
  32 {
  33   int rowstride = s->paddedWidthInBytes, bpp = s->bitsPerPixel>>3;
  34   int i;
  35   char* colour=(char*)&col;
  36
  37   if(!rfbEndianTest)
  38     colour += 4-bpp;
  39
  40 #define SWAPPOINTS { i=x1; x1=x2; x2=i; i=y1; y1=y2; y2=i; }
  41   if(abs(x1-x2)<abs(y1-y2)) {
  42     if(y1>y2)
  43       SWAPPOINTS
  44     for(i=y1;i<=y2;i++)
  45       SETPIXEL(x1+(i-y1)*(x2-x1)/(y2-y1),i);
  46     /* TODO: Maybe make this more intelligently? */
  47     if(x2<x1) { i=x1; x1=x2; x2=i; }
  48     rfbMarkRectAsModified(s,x1,y1,x2+1,y2+1);
  49   } else {
  50     if(x1>x2)
  51       SWAPPOINTS
  52     else if(x1==x2) {
  53       rfbDrawPixel(s,x1,y1,col);
  54       return;
  55     }
  56     for(i=x1;i<=x2;i++)
  57       SETPIXEL(i,y1+(i-x1)*(y2-y1)/(x2-x1));
  58     if(y2<y1) { i=y1; y1=y2; y2=i; }
  59     rfbMarkRectAsModified(s,x1,y1,x2+1,y2+1);
  60   }
  61 }