void LCD_Circle(u16 Xpos, u16 Ypos, u16 Radius, u16 color)
{
s32 Dec;
u32 CurX;
u32 CurY;
CurX=0;
CurY=Radius;
Dec=3-(Radius<<1);
while(CurX<=CurY)
{
LCD_Point(Xpos+CurX,Ypos+CurY,color);
LCD_Point(Xpos+CurX,Ypos-CurY,color);
LCD_Point(Xpos-CurX,Ypos+CurY,color);
LCD_Point(Xpos-CurX,Ypos-CurY,color);
LCD_Point(Xpos+CurY,Ypos+CurX,color);
LCD_Point(Xpos+CurY,Ypos-CurX,color);
LCD_Point(Xpos-CurY,Ypos+CurX,color);
LCD_Point(Xpos-CurY,Ypos-CurX,color);
if(Dec<0)Dec+=(CurX<<2)+6;
else
{
Dec+=((CurX-CurY)<<2)+10;
CurY--;
}
CurX++;
}
}
void LCD_Line(u16 x1, u16 y1, u16 x2, u16 y2, u16 color)
{
u16 t;
int xerr=0,yerr=0,delta_x,delta_y,distance;
int incx,incy,uRow,uCol;
delta_x=x2-x1; //计算坐标增量
delta_y=y2-y1;
uRow=x1;
uCol=y1;
if(delta_x>0)incx=1; //设置单步方向
else if(delta_x==0)incx=0;//垂直线
else {incx=-1;delta_x=-delta_x;}
if(delta_y>0)incy=1;
else if(delta_y==0)incy=0;//水平线
else{incy=-1;delta_y=-delta_y;}
if( delta_x>delta_y)distance=delta_x; //选取基本增量坐标轴
else distance=delta_y;
for(t=0;t<=distance+1;t++ )//画线输出
{
LCD_Point(uRow,uCol,color);//画点
xerr+=delta_x ;
yerr+=delta_y ;
if(xerr>distance)
{
xerr-=distance;
uRow+=incx;
}
if(yerr>distance)
{
yerr-=distance;
uCol+=incy;
}
}
}
void LCD_DispBmp1bpp(u8 x0,u8 y0,u8 w,u8 h,u8 *pic)
{
u8 i,j,z,c;
for(i=y0;i<=y0+h;i++)
{
for(j=x0;j<=x0+w;j+=8)
{
c=(*pic++);
for (z=0;z<8;z++)
if ((c<<z)&0x80)
LCD_Point(j+z,i,1);
else
LCD_Point(j+z,i,0);
}
}
}
void LCD_Fill(u8 x0,u8 y0,u8 x1,u8 y1,u8 c)
{
u16 i,j;
for(i=y0;i<=y1;i++)
{
for(j=x0;j<=x1;j++)
{
LCD_Point(j,i,c);
}
}
}
