window.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

/********************************************************
 * Egui code,LGPL
 * Function : Egui library on Linux framebuffer 
 * Author: [e-mail]
 * Data : 2006-02-22
 * $Id: window.c,v 1.16 2006/04/05 17:16:21 hjs Exp $
 ********************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <linux/fb.h>
#include <Egui.h>
#include <font_8x16.h> 		/* Egui default font */

EGui_Window * Ewindow;
int save_self = 0;
#define C_WIDTH   10
#define C_HEIGHT  17

#define T___ 0xFF000000
#define BORD 0x00FFFFFF //white
#define X___ 0x00       //black
static unsigned long cursor_pixel [C_WIDTH * C_HEIGHT] = {
BORD,T___,T___,T___,T___,T___,T___,T___,T___,T___,
BORD,BORD,T___,T___,T___,T___,T___,T___,T___,T___,
BORD,X___,BORD,T___,T___,T___,T___,T___,T___,T___,
BORD,X___,X___,BORD,T___,T___,T___,T___,T___,T___,
BORD,X___,X___,X___,BORD,T___,T___,T___,T___,T___,
BORD,X___,X___,X___,X___,BORD,T___,T___,T___,T___,
BORD,X___,X___,X___,X___,X___,BORD,T___,T___,T___,
BORD,X___,X___,X___,X___,X___,X___,BORD,T___,T___,
BORD,X___,X___,X___,X___,X___,X___,X___,BORD,T___,
BORD,X___,X___,X___,X___,X___,X___,X___,X___,BORD,
BORD,X___,X___,X___,X___,X___,BORD,BORD,BORD,BORD,
BORD,X___,X___,BORD,X___,X___,BORD,T___,T___,T___,
BORD,X___,BORD,T___,BORD,X___,X___,BORD,T___,T___,
BORD,BORD,T___,T___,BORD,X___,X___,BORD,T___,T___,
T___,T___,T___,T___,T___,BORD,X___,X___,BORD,T___,
T___,T___,T___,T___,T___,BORD,X___,X___,BORD,T___,
T___,T___,T___,T___,T___,T___,BORD,BORD,T___,T___
};

static unsigned char *old_cursor;  
static int old_x = -1,old_y = -1;
static int hide = 1;

int 
init_cursor ( EGui_Window * ewindow)
{
  int j,i,count;
  unsigned long * p;
  int cursor_y = C_HEIGHT;
  int cursor_x = C_WIDTH;
  Ecolor color;
  
  /*
   *conversion cursor RGB to pixel
   */
  p = cursor_pixel;
  for (j=0;j<cursor_y;j++)
    {
      for (i=0;i<cursor_x;i++)
	{
	  if (p[i+ j * cursor_x] != T___)
	  {
	    count = i + j * cursor_x;
	    color.b = p[count] & 0xFF;
	    color.g = (p[count] >> 8) & 0xFF;
	    color.r = (p[count] >> 16) & 0xFF;
	    p[count] = pixel_from_rgb (ewindow,&color); 
	  }
	}
    }
  old_cursor = (unsigned char *)malloc ( cursor_x * cursor_y * ewindow->fbinfo->p_bpp);
  if (old_cursor == NULL)
    {
      printf ("CURSOR malloc ERROR\n");
    }
}


int
draw_cursor (int x,int y,unsigned long *p, EGui_Window * ewindow)
{
  int i;
  int j;
  EGui_FBinfo * fbinfo= ewindow->fbinfo;
  Ecolor color;

  int cursor_y = C_HEIGHT;
  int cursor_x = C_WIDTH;
  

  if ((x + cursor_x) > ewindow->max_width)
    return;
  if ((y + cursor_y) > ewindow->max_height)
    return;

  for (j=0;j<cursor_y;j++)
    {
      for (i=0;i<cursor_x;i++)
	{
	  if (p[i+ j * cursor_x] != T___)
	    {
	      /* It is unsafe, r,g,b is empty.
	       */
	      color.pixel = p[i+ j * cursor_x];
	      Egui_wpixel(x+i,y+j,&color,ewindow);
	    }
	}
    }
}

int 
write_cursor_buf (int x,int y,unsigned char *p, EGui_Window *ewindow)
{
  int cursor_y = C_HEIGHT;
  int cursor_x = C_WIDTH;
  
  old_x = x;
  old_y = y;

  if ((x + cursor_x) > ewindow->max_width)
    return;
  if ((y + cursor_y) > ewindow->max_height)
    return;

  Egui_writebuf (x,y,cursor_x,cursor_y,cursor_x,p,ewindow);

}

int
save_cursor_buf (int x,int y,unsigned char *p, EGui_Window * ewindow)
{

  int cursor_y = C_HEIGHT;
  int cursor_x = C_WIDTH;
  
  old_x = x;
  old_y = y;

  if ((x + cursor_x) > ewindow->max_width)
    return;
  if ((y + cursor_y) > ewindow->max_height)
    return;

  Egui_readbuf (x,y,cursor_x,cursor_y,p,ewindow);

}


int 
move_mouse (int x,int y)
{
  //first move mouse ,don't need restore
  hide_cursor ( );
  show_cursor (x,y);
}

int
hide_cursor ( void )
{				
  /* cursor had hid */
  if (hide)
    return 1;

  hide = 1;
  write_cursor_buf(old_x,old_y,old_cursor,Ewindow);
}

int
show_cursor (int x,int y)
{
  hide = 0;
  save_cursor_buf (x,y,old_cursor,Ewindow);
  draw_cursor (x,y,cursor_pixel,Ewindow);
}



int
move_window ( EGui_Event * event, EGui_Window * ewindow)
{
  int x,y,re_x,re_y;

  x    = event->x;
  y    = event->y;
  re_x = x - old_x;
  re_y = y - old_y;

  hide_cursor( );
  
  save_selfwindow (ewindow);
  restore_window (ewindow,re_x,re_y);

  ewindow->x += re_x;
  if (ewindow->x < 0)
    ewindow->x = 0;
  if ((ewindow->x + ewindow->width ) > ewindow->max_width)
    ewindow->x = ewindow->max_width - ewindow->width;
			    
  ewindow->y += re_y;
    if (ewindow->y < 0)
    ewindow->y = 0;
  if ((ewindow->y + ewindow->height) > ewindow->max_height)
    ewindow->y = ewindow->max_height - ewindow->height;
 
  ioctl ( eguifd,EGUI_REPORT_EVENT,ewindow);

  move_selfwindow (ewindow);

  show_cursor( x, y );
  
}

int 
move_selfwindow (  EGui_Window *ewindow)
{
  int x,y,width,height;
  int i;
  int color;

  save_window (ewindow);

  x       = ewindow->x;
  y       = ewindow->y;
  width   = ewindow->width;
  height  = ewindow->height;

  Egui_writebuf (x,y,width,height,width,ewindow->saveself,ewindow);

}

int
restore_window(  EGui_Window *ewindow, int re_x,int re_y)
{
  int x,y,width,height;
  int i;
  int color;

  x       = ewindow->x;
  y       = ewindow->y;
  width   = ewindow->width;
  height  = ewindow->height;
  
  /* When window be moved,
   * maybe there are 2 rectanges gap.
   */

  Egui_writebuf (x,y,width,height,width,ewindow->savebuf,ewindow);

}

int 
save_selfwindow ( EGui_Window * ewindow)
{
  int x,y,width,height;
  int i;
  int color;

  if (save_self != 0)
	return 0;
  save_self = 1;
  x       = ewindow->x;
  y       = ewindow->y;
  width   = ewindow->width;
  height  = ewindow->height;
 
  Egui_readbuf (x,y,width,height,ewindow->saveself,ewindow);

}

int 
save_window( EGui_Window * ewindow)
{
  int x,y,width,height;
  int i;
  int color;

  x       = ewindow->x;
  y       = ewindow->y;
  width   = ewindow->width;
  height  = ewindow->height;
  
  Egui_readbuf (x,y,width,height,ewindow->savebuf,ewindow);
}

EGui_Window *
Egui_CreateWindow ( EGui_FBinfo *fbinfo,short x,short y,
		  short width,short height, Ecolor * bgcolor,char window_type)
{  
  EGui_Window *ewindow;
  
  ewindow = ( EGui_Window *) malloc (sizeof ( EGui_Window));
  if (ewindow == NULL)
    {
      printf ("Egui : malloc a new window failed!\n");
      return NULL;
    }

  
  ewindow->pid = getpid ( );
  
  ewindow->x            = x ;
  ewindow->y            = y ;
  ewindow->width        = width + 2 * FRAME_W;
  ewindow->height       = height + 2 * FRAME_W + TITLE_H;
  ewindow->bgcolor      = bgcolor;
  ewindow->window_type  = window_type;
  ewindow->fbinfo       = fbinfo;
  ewindow->title_h      = TITLE_H;
  ewindow->frame_w      = FRAME_W;
  fbinfo->ewindow       = ewindow;
  ewindow->max_width    = fbinfo->screen_width  - 1; /* pixel start from 0*/
  ewindow->max_height   = fbinfo->screen_height - 1;

  
  if ((ewindow->width  + ewindow->x) > ewindow->max_width)
    ewindow->width = ewindow->max_width - ewindow->x;

  if ((ewindow->height  + ewindow->y) > ewindow->max_height)
    ewindow->height = ewindow->max_height - ewindow->y;

  /* buffer save pixel 's int data type RGB value */
  ewindow->savebuf = (unsigned char *) malloc (ewindow->width * fbinfo->p_bpp * ewindow->height);
  ewindow->saveself = (unsigned char *) malloc (ewindow->width * fbinfo->p_bpp * ewindow->height);
  if (ewindow->savebuf == NULL || ewindow->saveself == NULL)
    {
      printf ("Egui : malloc window buffer failed!\n");
      return NULL;
    }

  if (window_type == EGUI_WINDOW_ROOT)
    {
      ewindow->title_h = ewindow->frame_w = 0;
    }
  /* Ewindow only for move window */
  Ewindow              = ewindow;

  if(ioctl ( eguifd,EGUI_NEWWINDOW,ewindow))
    {
      /* new window failed */

      free (ewindow->savebuf);
      free (ewindow);
      Ewindow = NULL;
      
      return NULL;
    }

  color_from_rgb (ewindow,bgcolor);
  init_cursor(ewindow);      
  printf ("New windows id = %d\n",ewindow->id);
      
  return ewindow;
}




int
Egui_drawwindow ( EGui_Window *ewindow)
{
  int x,y,width,height;
  int i,w,h;
  Ecolor color;
  Efont *font;

  x       = ewindow->x;
  y       = ewindow->y;
  width   = ewindow->width;
  height  = ewindow->height;
  w       = ewindow->frame_w;
  h       = ewindow->title_h;

  save_window(ewindow);

  /*Only TOPWindow need Title Bar*/
  if (ewindow->window_type == EGUI_WINDOW_TOP)
    {
      /**/
      color.r = color.g = color.b = 0xFF;//white    
      color_from_rgb (ewindow,&color);
      Egui_rect (0,0,width-3,height-3,&color,ewindow);
      
      color.r = color.g = color.b = 0xCC;//gray    
      color_from_rgb (ewindow,&color);
      Egui_rect (1,1,width-2,height-2,&color,ewindow);
      
      color.r = color.g = color.b = 0xA0;//gray    
      color_from_rgb (ewindow,&color);
      Egui_rect (2,2,width-1,height-1,&color,ewindow);
      
      
      /* draw Title bar */
      for ( i = w; i< (ewindow->title_h + w); i++)
	{
	  color.r = color.g = color.b = 0x5F * i / (ewindow->title_h+w) + 0xA0;
	  color_from_rgb (ewindow,&color);
	  Egui_line (w,i,ewindow->width - w - 1,i,&color,ewindow);
	}

      new_color(ewindow,&color,0xE0);
      Egui_drawstring(4,3,ewindow->name,font,&color,ewindow);
    }

}

int 
Egui_SetWindowName (EGui_Window * ewindow,char * name)
{
  int len;
  
  len = strlen (name);
  if (len > NAMELEN)
    len = NAMELEN;
  else
    ewindow->name[len] = '\0';

  strncpy (ewindow->name,name,len);
}

int
Egui_CloseWindow ( EGui_Window * ewindow)
{

  ioctl ( eguifd,EGUI_CLOSEWINDOW,ewindow);

  free (ewindow->savebuf);
  free (ewindow);
  Ewindow = NULL;
  return 0;
   
}