drawmap.c

GPS导航系统中

/*
 *    line drawing sample program
 *
 *    Copyright (C) 2002-2004 by Personal Media Corporation
 */

#include "navigator.h"
#include <stdlib.h>
#include "graphic.h"
#include "conv.h"

EXPORT ID draw_map_tid;        /* drap map task ID */

LOCAL BMP devbmp;
LOCAL BMP bufbmp;
LOCAL RECT r_upd;

LOCAL char buffer[320*240*sizeof(UH)];
LOCAL void doubl_buf_draw(BMP* devbmp,BMP* bufbmp)
{
	
		bufbmp->baseaddr[0]=buffer;
		bufbmp->planes=devbmp->planes;
		bufbmp->pixbits=devbmp->pixbits;
		bufbmp->rowbytes=devbmp->rowbytes;

		devbmp->bounds.c.left=0;
		devbmp->bounds.c.right=320;
		devbmp->bounds.c.top=0;
		devbmp->bounds.c.bottom=240;
		bufbmp->bounds=devbmp->bounds;
		
}

LOCAL void update_screen(BMP* devbmp,BMP* bufbmp)
{
	memcpy(devbmp->baseaddr[0],bufbmp->baseaddr[0],320*240*sizeof(UH));
}


/*
 * initialization
 */


LOCAL void init( void )
{
    /* fill total screen in white */
    fill_rect( devbmp.bounds.c.left, devbmp.bounds.c.top,
               devbmp.bounds.c.right, devbmp.bounds.c.bottom,
               0x00ffffff, &devbmp );
		
    /* update area is to be all */
    r_upd = devbmp.bounds;
}
char    temp[100];
unsigned char * draw_buffer;
LOCAL void draw()
{

	  LPOINTSCR apt=(POINTSCR*)(&draw_buffer[0]);

		fill_rect( bufbmp.bounds.c.left, bufbmp.bounds.c.top,
               bufbmp.bounds.c.right, bufbmp.bounds.c.bottom,
               0x00ffffff, &bufbmp );
		draw_map_line(pline,apt,&bufbmp);
		draw_map_region(region,apt,&bufbmp);
		draw_circle(160,120,3,0,&bufbmp);

}

/*
 * draw map task
 */
EXPORT void draw_map_task( INT stacd, VP exinf )
{
    UB      devnm[8];         /* device name */
    ID      dds;         /* device descriptor */
    INT     asiz;             /* read/write size */
    ER      ercd;             /* error code */
    

	
    /* open SCREEN device */
    strcpy( devnm, "SCREEN" );
    dds = tk_opn_dev( devnm, TD_UPDATE ); /* open device in update mode */

    /* read device specific image area */
    ercd = tk_srea_dev( dds, DN_SCRBMP, &devbmp, sizeof(BMP), &asiz );

    /* color map setting */
    switch (devbmp.pixbits >> 8) { /* bit count per 1 pixel */
    case 8 :
        ercd = tk_swri_dev( dds, DN_SCRCOLOR, (VP)colormap, sizeof(colormap), &asiz );
        break;
    }

	doubl_buf_draw(&devbmp,&bufbmp);
		
    init();
    tk_swri_dev(dds, DN_SCRUPDRECT, &r_upd, sizeof(RECT), &asiz);
   
	draw_buffer=(unsigned char *)malloc(maxpoints*sizeof(POINTSCR));

    for(;;)
    {
       // init();
		sprintf(temp,"X:%f,Y:%f\n",jingdu,weidu);
		draw();
		draw_text(temp,10,20,255,&bufbmp);
		
		update_screen(&devbmp,&bufbmp);
		//wait for 50ms
     	ercd = tk_dly_tsk(50);
     	
     	/* in case of break, exit loop for termination */
		if (MERCD(ercd) == MERCD(E_RLWAI)) break;
   }

	free(draw_buffer);
    tk_cls_dev(dds, 0 );

    /* terminate/delete key input task */
    tk_exd_tsk();

}

EXPORT void exitpro()
{
    fill_rect( devbmp.bounds.c.left, devbmp.bounds.c.top,
               devbmp.bounds.c.right, devbmp.bounds.c.bottom,
               0x0, &devbmp );
}