graphic.c

2440 ADS项目

#include "2440addr.h"
#include "2440lib.h"
#include "myTFT.h"
#include "color.h"
#include "graphic.h"

/* 
 * draw a dot in the LCD
 * x,y : coordinate of the pixel to be lightened
 * color : the color of the dot
 */
void draw_dot(int x, int y, int color)
{
     unsigned int addr;	       	
     
     addr=LCDFRAMEBUFFER+(x+y*SCR_XSIZE)*2;
     *(volatile short *)(addr)=color;    	  	               
}

/* draw a vertical line */
void draw_vline(int x, int y1, int y2, int color)
{
	int i;
	unsigned int addr;

	if(y2<y1)  return;
	
	addr=LCDFRAMEBUFFER+(x+y1*SCR_XSIZE)*2;
	for(i=y1; i<y2+1; i++) {
		*(volatile short *)(addr)=color;
		addr += SCR_XSIZE << 1;
	}
}

/* draw a horizontal line */
void draw_hline(int x1, int x2, int y, int color)
{
	int i;
	unsigned int addr;

	if(x2<x1)  return;
	
	addr=LCDFRAMEBUFFER+(x1+y*SCR_XSIZE)*2;
	for(i=x1; i<x2+1; i++) {
		*(volatile short *)(addr)=color;
		++addr;
	}
}


/*
 * (start_x,start_y) : coordinate of the top-left-corner of the rectangle 
 * (end_x,end_y) : coordinate of the bottom-right-corner of the rectangle
 */
void draw_rectangle(int start_x, int start_y, int end_x, int end_y, int color)
{
	draw_vline(start_x, start_y, end_y, color);
	draw_vline(end_x, start_x, end_y, color);	
	draw_hline(start_x, end_x, start_y, color);
	draw_hline(start_x, end_x, end_y, color);	
}


/*
 * (start_x,start_y) : coordinate of the top-left-corner of the rectangle 
 * (end_x,end_y) : coordinate of the bottom-right-corner of the rectangle
 * this rectangle is filled with pixels which color is the same as the frame
 */
void draw_fill_rectangle(int start_x, int start_y, int end_x, int end_y, int color)
{
	int i;
	
	for(i=start_y; i<end_y+1; i++) {
		draw_hline(start_x, end_x, i, color);
	}
}