droidVncServer/jni/vnc/update_screen.c

/*
droid VNC server  - a vnc server for android
Copyright (C) 2011 Jose Pereira <onaips@gmail.com>

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/
 
#define OUT_T CONCAT3E(uint,OUT,_t)
#define FUNCTION CONCAT2E(update_screen_,OUT)

void FUNCTION(void)
{  
  int i,j;
  int offset=0,pixelToVirtual;
  OUT_T* a;
  OUT_T* b=0;
  
  
  if (method==FRAMEBUFFER)
      update_fb_info();//important for doubleframebuffing_*
  else if (method==ADB)
      updateADBFrame();
  else if (method==GRALLOC)
      readfb_gralloc();
  #ifndef ANDROID_FROYO
  else if (method==GINGERBREAD)
      updateScreen();
  #endif
  
  a = (OUT_T*)cmpbuf;
  
  if (method==FRAMEBUFFER)
    b = (OUT_T*)fbmmap;
  else if (method==ADB)
    b = (OUT_T*)adbbuf;
  else if (method==GRALLOC)
    b = (OUT_T*)grallocfb;
  #ifndef ANDROID_FROYO
  else if (method==GINGERBREAD)
    b = (OUT_T*)gingerbuf;
  #endif

  int max_x=-1,max_y=-1, min_x=99999, min_y=99999;
  idle=1;

  if (rotation==0)
  {
	for (j = 0; j < vncscr->height; j++)
	{
	    for (i = 0; i < vncscr->width; i++)
	    {
	       offset = j * vncscr->width;
	       
	       if (method==FRAMEBUFFER)
		  pixelToVirtual = PIXEL_TO_VIRTUALPIXEL_FB(i,j);
	       else
		  pixelToVirtual = PIXEL_TO_VIRTUALPIXEL(i,j);
	       
		if (a[i + offset]!=b[pixelToVirtual])
		{
		  a[i + offset]=b[pixelToVirtual];
		  if (i>max_x)
		    max_x=i;
		  if (i<min_x)
		    min_x=i;
		  
		  if (j>max_y)
		    max_y=j;
		  if (j<min_y)
		    min_y=j;
		  
		    idle=0;
		}
	    }
	}
// 		memcpy(a,b,vncscr->width*vncscr->height*scrinfo.bits_per_pixel/CHAR_BIT); 
  }
  else if (rotation==90)
  {
	for (j = 0; j < vncscr->width; j++)
	{
	  for (i = 0; i < vncscr->height; i++)
	    
		{
		  offset = i * vncscr->width;
		  
	       if (method==FRAMEBUFFER)
		  pixelToVirtual = PIXEL_TO_VIRTUALPIXEL_FB(i,j);
	       else
		  pixelToVirtual = PIXEL_TO_VIRTUALPIXEL(i,j);		  
	       
		  if (a[(vncscr->width - 1 - j + offset)] != b[pixelToVirtual])
		   {
		  a[(vncscr->width - 1 - j + offset)] = b[pixelToVirtual];
		  
		  if (i>max_y)
		    max_y=i;
		  if (i<min_y)
		    min_y=i;
		  
		  int h=vncscr->width-j;
		  
		  if (h < min_x)
		    min_x=vncscr->width-j;
 		  if (h > max_x)
		    max_x=vncscr->width-j;
		  
		    idle=0;
		  }
		}
	}
  }
  else if (rotation==180)
  {
        for (j = 0; j < vncscr->height; j++)
	{
		for (i = 0; i < vncscr->width; i++)
		{
		   offset = (vncscr->height - 1 - j) * vncscr->width;
		   
	       if (method==FRAMEBUFFER)
		  pixelToVirtual = PIXEL_TO_VIRTUALPIXEL_FB(i,j);
	       else
		  pixelToVirtual = PIXEL_TO_VIRTUALPIXEL(i,j);
		  
		  if (a[((vncscr->width - 1 - i) + offset )]!=b[pixelToVirtual])
		  {
		  a[((vncscr->width - 1 - i) + offset )]=b[pixelToVirtual];
		    
		    
		  if (i>max_x)
		    max_x=i;
		  if (i<min_x)
		    min_x=i;
		  
		  int h=vncscr->height-j;
		  
		  if (h < min_y)
		    min_y=vncscr->height-j;
 		  if (h > max_y)
		    max_y=vncscr->height-j;
		  
		    idle=0;
		  }
		}
	}
  }
  else if (rotation==270)
  {
    	for (j = 0; j < vncscr->width; j++)
	{
		for (i = 0; i < vncscr->height; i++)
		{
		    offset = (vncscr->height - 1 - i) * vncscr->width;
		  
	       if (method==FRAMEBUFFER)
		  pixelToVirtual = PIXEL_TO_VIRTUALPIXEL_FB(i,j);
	       else
		  pixelToVirtual = PIXEL_TO_VIRTUALPIXEL(i,j);
		  
		    if(a[j + offset] != b[pixelToVirtual])
		    {
		      a[j + offset] = b[pixelToVirtual];
		       
		      if (i>max_y)
			max_y=i;
		      if (i<min_y)
			min_y=i;
		  
		      if (j < min_x)
			min_x=j;
		      if (j > max_x)
			max_x=j;
		    
			idle=0;
		    }
		}
	}
}


  if (!idle)
  {
     memcpy(vncbuf,a,displayInfo.width*displayInfo.height*displayInfo.bpp/CHAR_BIT);

     min_x--;
     min_x--;
     max_x++;
     max_y++;
  
//        L("Changed x(%d-%d) y(%d-%d)\n",min_x,max_x,min_y,max_y);
     
     rfbMarkRectAsModified(vncscr, min_x, min_y, max_x, max_y);
  } 
  
}