libegui.c

EGui是一个开源的图形系统软件,类似于QT/Embedded、GTK-FB、MicroWindow。目标是嵌入式平台整合解 决方案。基于Linux Framebuffer 设备驱动上实现。有完

  address = fbinfo->Egui_address;
  bpp     = fbinfo->p_bpp;
  pwidth  = fbinfo->p_width;

  for ( i = 0; i<height ;i++)
    { 
      memcpy(address+ (y+i) * pwidth + x * bpp,buffer + buffer_width * bpp * i ,width * bpp);
    }  

}

int 
Egui_readbuf (int x,int y,int width,int height,
	      unsigned char *buffer, EGui_Window *ewindow)
{
  int i;
  int bpp;
  int pwidth;
  unsigned char * address;
  EGui_FBinfo * fbinfo= ewindow->fbinfo;

  address = fbinfo->Egui_address;
  bpp     = fbinfo->p_bpp;
  pwidth  = fbinfo->p_width;

  for ( i = 0; i<height ;i++)
    { 
      memcpy(buffer+width * bpp * i,address+ (y+i) * pwidth + x * bpp,width * bpp);
    }  

}

int 
Egui_hline (int x,int y,int x1,int y1, Ecolor * color, EGui_Window * ewindow)
{
  int i;
  int maxx,minx;
  EGui_FBinfo * fbinfo= ewindow->fbinfo;

  if (y != y1)
    {
      printf ("No hline y=%d,y1=%d\n",y,y1);
    }
  
  maxx = x1;
  minx = x;
  
  if (x>x1)
    {
      maxx = x;
      minx = x1;
    }
  

  if (minx > ewindow->width)
    return -1;
  if (y > ewindow->height)
    return -1;

  minx = ewindow->x + minx;
  y    = ewindow->y + y;

  if (maxx > ewindow->width)
    maxx = ewindow->x + ewindow->width;
  else maxx = ewindow->x + maxx;


  for (i = minx;i <= maxx ; i++)
    {
      Egui_wpixel (i,y,color,ewindow);
    }
  return 0;
  
}

int 
Egui_vline (int x,int y,int x1,int y1, Ecolor * color, EGui_Window * ewindow)
{
  int i;
  int maxy,miny;
  EGui_FBinfo * fbinfo= ewindow->fbinfo;

  if (x != x1){
    printf ("No vline x=%d,x1=%d\n",x,x1);
  }

  maxy = y1;
  miny = y;
  if (y>y1){
    maxy = y;
    miny = y1;
  }

  if (miny > ewindow->height)
    return -1;
  if (x > ewindow->width)
    return -1;

  miny = ewindow->y + miny;
  x    = ewindow->x + x;

  if (maxy > ewindow->height)
    maxy = ewindow->y + ewindow->height;
  else maxy = ewindow->y + maxy;


  for (i=miny;i <= maxy;i++){
    Egui_wpixel (x,i,color,ewindow);
  }
  return 0;
}

int 
Egui_line (int x,int y,int x1,int y1, Ecolor *color, EGui_Window * ewindow)
{
   EGui_FBinfo * fbinfo= ewindow->fbinfo;

  int s_width;
  int s_height;
  int dx, dy, e, j, xchange;
  char s1, s2;
 
  

  s_width  = ewindow->width;
  s_height = ewindow->height;
  
  if (x<0||x1<0||y<0||y1<0){
    printf ("Egui ERROR:x = %d x1 = %d y = %d y1 = %d,someone <0.\n",x,x1,y,y1);
    return -1;
  }
  
  if (x == x1){
    Egui_vline(x,y,x1,y1,color,ewindow);
    return 0;
  }
  
  if (y == y1){
    Egui_hline(x,y,x1,y1,color,ewindow);
    return 0;
  }
  

  /* Bresenham */
  s1 = 1;
  s2 = 1;
  
  dx = x1-x;
  if (dx < 0) {
    dx = -dx;
    s1 = -1;
  }
  
  dy = y1-y;
  if (dy < 0) {
    dy = -dy;
    s2 = -1;
  }
  
  xchange = 0;
  
  if (dy>dx) {
    int tmp = dx;
    dx = dy;
    dy = tmp;
    xchange = 1;
  }
  
  e = (dy<<1) - dx;
  for (j=0; j <= dx; j++)
    {

      Egui_wpixel(ewindow->x + x,ewindow->y + y,color,ewindow);
      if (e >= 0) {
	if (xchange)
	  x += s1;
	else
	  y += s2;
	e -= (dx << 1);
      }
      if (xchange)
	y += s2;
      else
	x += s1;
      e += (dy << 1);
    }

  return 0;
  
}

int 
Egui_rect (int x,int y,int x1,int y1, Ecolor *color, EGui_Window * ewindow)
{
  int s_width;
  int s_height;
  EGui_FBinfo * fbinfo= ewindow->fbinfo;


  s_width  = fbinfo->screen_width;
  s_height = fbinfo->screen_height;
  
  if (x<0||x1<0||y<0||y1<0){
    printf ("Egui ERROR:x = %d x1 = %d y = %d y1 = %d,someone <0.\n",x,x1,y,y1);
    return -1;
  }
  
  if (x >s_width-1||x1>s_width-1||y>s_height-1||y1>s_height-1){
    printf ("Egui ERROR:x = %d x1 = %d y = %d y1 = %d,someone too big.\n",x,x1,y,y1);
    return -1;
  }
  
  Egui_hline (x,y,x1,y,color,ewindow);
  Egui_hline (x,y1,x1,y1,color,ewindow);
  
  Egui_vline (x,y,x,y1,color,ewindow);
  Egui_vline (x1,y,x1,y1,color,ewindow);
  
  return 0;

}

int 
Egui_fill (int x,int y,int x1,int y1, Ecolor * color, EGui_Window * ewindow)
{
  int i;
  int s_width;
  int s_height;
  int maxy,miny;
  EGui_FBinfo * fbinfo= ewindow->fbinfo;

  s_width  = fbinfo->screen_width;
  s_height = fbinfo->screen_height;
  
  if (x<0||x1<0||y<0||y1<0)
    {
      printf ("Egui ERROR:x = %d x1 = %d y = %d y1 = %d,someone <0.\n",x,x1,y,y1);
      return -1;
    }
  
  if (x >s_width-1||x1>s_width-1||y>s_height-1||y1>s_height-1)
    {
      printf ("Egui ERROR:x = %d x1 = %d y = %d y1 = %d,someone too big.\n",x,x1,y,y1);
      return -1;
    }
  
  maxy = y1;
  miny = y;
  if ( y > y1)
    {
      maxy = y;
      miny = y1;
    }
  
  
  for (i=miny;i <= maxy;i++)
    Egui_hline (x,i,x1,i,color,ewindow);

  
  return 0;

}

int
Egui_string_width ( Efont *font)
{
  /* need modify,now i use default font 8x16 */
  font = & defaultfn;  

  return font->width;
}

int
Egui_string_height ( Efont *font)
{
  /* need modify,now i use default font 8x16 */
  font = & defaultfn;  

  return font->height;
}

/*
 * value is pixel
 */
int
Egui_drawchar(int x,int y,char ch, Efont *font,
	       Ecolor * color,  EGui_Window *ewindow)
{
  int i,j;

  for (j=0;j<font->height;j++)
    { 				/* draw a line */
      for (i=0;i<font->width;i++)
	{
	 
	  if(font->font_buf[ch * font->height + j] & (1<<i))
	    {
	      Egui_wpixel (x + ewindow->x + font->width - i,
			   (y + j) + ewindow->y,color,ewindow);
	    }
	}
    }

}
/*
 * value is pixel
 */
int
Egui_drawstring(int x,int y,char * string, Efont *font,
		 Ecolor *color,  EGui_Window *ewindow)
{
  int i;
  int len;

  /* need modify,now i use default font 8x16 */
  font = & defaultfn;  

  len = strlen (string);

  for (i = 0; i < len ; i ++)
    Egui_drawchar (x + i * font->width,y,string[i],font,color,ewindow);
 
  return 0;
}

int
Egui_drawrgb (int x,int y,int width,int height,char * rgbbuf,
	       EGui_Window * ewindow)
{
  int i,j;
  Ecolor color;

  for (j = 0;j < height;j++)
    {
      for (i = 0;i < width * 3;i += 3 )
	{  
	  color.b = rgbbuf [j * width * 3 + i];
	  color.g = rgbbuf [j * width * 3 + i + 1];
	  color.r = rgbbuf [j * width * 3 + i + 2];
	  color_from_rgb (ewindow,&color);
	  
	  Egui_wpixel(ewindow->x+i / 3  + x,ewindow->y + j + y,&color,ewindow);
	}
     
    }
  return;
}


/* x,y is screen offset position ;
 * width,height is display width and height;
 * px,py is pixmap 's offset position;
 * pw,ph is pixmap 's buffer width and height;
 */

int
Egui_drawpixmap (int x,int y,int width,int height,char * pixmap,
		 int px, int py, int pw,int ph,
	       EGui_Window * ewindow)
{
  int i;
  int bpp;
  int pwidth;
  unsigned char * address;
  EGui_FBinfo * fbinfo= ewindow->fbinfo;

  address = fbinfo->Egui_address;
  bpp     = fbinfo->p_bpp;
  pwidth  = fbinfo->p_width;

  /* if have not enough pixmap width and height,
   * only display pixmap 's pw and ph.
   */
  if (width > pw)
    width = pw;
  if (height > ph)
    height = ph;

  x = ewindow->x + x;
  y = ewindow->y + y;
  /* goto pixmap's offset */
  pixmap = pixmap + px + pw * bpp * py;

  for (i = 0;i < height;i++)
    {
      memcpy(address+ (y+i) * pwidth + x * bpp, pixmap + pw * bpp * i ,width * bpp);     
    }
  return;
}

int
Egui_getrgb (int x,int y,int width,int height,char * rgbbuf,
	       EGui_Window * ewindow)
{
  int rgb;
  int i,j;
  unsigned char r,g,b;
  
  for (j = 0;j < height;j++)
    {
      for (i = 0;i < width * 3;i += 3 )
	{  
	  Egui_rpoint(ewindow->x+i / 3  + x,ewindow->y + j + y,&rgb,ewindow);
	  b = rgb & 0xFF;
	  g = (rgb >> 8 ) & 0xFF;
	  r = (rgb >> 16 ) & 0xFF;

	  rgbbuf [j * width * 3 + i]     = b;
	  rgbbuf [j * width * 3 + i + 1] = g;
	  rgbbuf [j * width * 3 + i + 2] = r;

	}
     
    }
  return;
}

int
Egui_shadow_out (int x,int y, int w,int h,EGui_Window * window)
{
      int i = 0;
      Ecolor color;

      new_color( window,&color,0xA0A0A0);
      Egui_rect (x+i,y+i,w-i-2,h-i-2, &color, window);
      
      i++;
      new_color( window,&color,0xF0F0F0);
      /* left vertical */
      Egui_line (x+i,y+i,x+i,h-i-2, &color, window);
      /* up horizontal */
      Egui_line (x+i,y+i,w-i-2,y+i, &color, window);
      
      new_color( window,&color,0x808080);
      /* right vertical */
      Egui_line (w-i,y+i-1,w-i,h-i, &color, window);
      /* bottom horizontal */
      Egui_line (x+i-1,h-i,w-i,h-i, &color, window);     

}


int
Egui_shadow_in (int x,int y,int w,int h,EGui_Window * window)
{
      int i = 0;
      Ecolor color;

      new_color( window,&color,0xA0A0A0);
      Egui_rect (x+i,y+i,w-i-2,h-i-2, &color, window);
      
      i++;
      new_color( window,&color,0x808080);   
      /* left vertical */
      Egui_line (x+i,y+i,x+i,h-i-2, &color, window);
      /* up horizontal */
      Egui_line (x+i,y+i,w-i-2,y+i, &color, window);
      
      new_color( window,&color,0xF0F0F0); 
      /* right vertical */
      Egui_line (w-i,y+i-1,w-i,h-i, &color, window);
      /* bottom horizontal */
      Egui_line (x+i-1,h-i,w-i,h-i, &color, window);     

      i++;
      new_color(window,&color,0xEDEDED);
      Egui_fill (x+i,y+i,w-i-1,h-i-1, &color, window);
}


int
egui_loop (void)
{
    
  while (1)
    {				/* loop get event */
      get_egui_event ();
      Egui_timer_handler();
    }
  return 0;
}