📄 gui.c
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/* 入口参数过滤 */
if(0==no)
return;
if(1==no) // 单点
{
x0 = *points++;
y0 = *points;
GUI_Point(x0, y0, color);
}
/* 画多条线条 */
x0 = *points++; // 取出第一点坐标值，作为原起点坐标值
y0 = *points++;
for(i=1; i<no; i++)
{
x1 = *points++; // 取出下一点坐标值
y1 = *points++;
GUI_Line(x0, y0, x1, y1, color);
x0 = x1; // 更新原起点坐标
y0 = y1;
}
}
#if GUI_CircleX_EN==1
/****************************************************************************
* 名称：GUI_Circle()
* 功能：指定圆心位置及半径，画圆。
* 入口参数：x0 圆心的x坐标值
* y0 圆心的y坐标值
* r 圆的半径
* color 显示颜色
* 出口参数：无
* 说明：操作失败原因是指定地址超出有效范围。
****************************************************************************/
void GUI_Circle(uint32 x0, uint32 y0, uint32 r, TCOLOR color)
{
int32 draw_x0, draw_y0; // 刽图点坐标变量
int32 draw_x1, draw_y1;
int32 draw_x2, draw_y2;
int32 draw_x3, draw_y3;
int32 draw_x4, draw_y4;
int32 draw_x5, draw_y5;
int32 draw_x6, draw_y6;
int32 draw_x7, draw_y7;
int32 xx, yy; // 画圆控制变量
int32 di; // 决策变量
/* 参数过滤 */
if(0==r)
return;
/* 计算出8个特殊点(0、45、90、135、180、225、270度)，进行显示 */
draw_x0 = draw_x1 = x0;
draw_y0 = draw_y1 = y0 + r;
if(draw_y0<GUI_LCM_YMAX)
GUI_Point(draw_x0, draw_y0, color); // 90度
draw_x2 = draw_x3 = x0;
draw_y2 = draw_y3 = y0 - r;
if(draw_y2>=0)
GUI_Point(draw_x2, draw_y2, color); // 270度
draw_x4 = draw_x6 = x0 + r;
draw_y4 = draw_y6 = y0;
if(draw_x4<GUI_LCM_XMAX)
GUI_Point(draw_x4, draw_y4, color); // 0度
draw_x5 = draw_x7 = x0 - r;
draw_y5 = draw_y7 = y0;
if(draw_x5>=0)
GUI_Point(draw_x5, draw_y5, color); // 180度
if(1==r)
return; // 若半径为1，则已圆画完
/* 使用Bresenham法进行画圆 */
di = 3 - 2*r; // 初始化决策变量
xx = 0;
yy = r;
while(xx<yy)
{
if(di<0)
{
di += 4*xx + 6;
}
else
{
di += 4*(xx - yy) + 10;
yy--;
draw_y0--;
draw_y1--;
draw_y2++;
draw_y3++;
draw_x4--;
draw_x5++;
draw_x6--;
draw_x7++;
}
xx++;
draw_x0++;
draw_x1--;
draw_x2++;
draw_x3--;
draw_y4++;
draw_y5++;
draw_y6--;
draw_y7--;
/* 要判断当前点是否在有效范围内 */
if( (draw_x0<=GUI_LCM_XMAX)&&(draw_y0>=0) )
{
GUI_Point(draw_x0, draw_y0, color);
}
if( (draw_x1>=0)&&(draw_y1>=0) )
{
GUI_Point(draw_x1, draw_y1, color);
}
if( (draw_x2<=GUI_LCM_XMAX)&&(draw_y2<=GUI_LCM_YMAX) )
{
GUI_Point(draw_x2, draw_y2, color);
}
if( (draw_x3>=0)&&(draw_y3<=GUI_LCM_YMAX) )
{
GUI_Point(draw_x3, draw_y3, color);
}
if( (draw_x4<=GUI_LCM_XMAX)&&(draw_y4>=0) )
{
GUI_Point(draw_x4, draw_y4, color);
}
if( (draw_x5>=0)&&(draw_y5>=0) )
{
GUI_Point(draw_x5, draw_y5, color);
}
if( (draw_x6<=GUI_LCM_XMAX)&&(draw_y6<=GUI_LCM_YMAX) )
{
GUI_Point(draw_x6, draw_y6, color);
}
if( (draw_x7>=0)&&(draw_y7<=GUI_LCM_YMAX) )
{
GUI_Point(draw_x7, draw_y7, color);
}
}
}
/****************************************************************************
* 名称：GUI_CircleFill()
* 功能：指定圆心位置及半径，画圆并填充，填充色与边框色一样。
* 入口参数：x0 圆心的x坐标值
* y0 圆心的y坐标值
* r 圆的半径
* color 填充颜色
* 出口参数：无
* 说明：操作失败原因是指定地址超出有效范围。
****************************************************************************/
void GUI_CircleFill(uint32 x0, uint32 y0, uint32 r, TCOLOR color)
{
int32 draw_x0, draw_y0; // 刽图点坐标变量
int32 draw_x1, draw_y1;
int32 draw_x2, draw_y2;
int32 draw_x3, draw_y3;
int32 draw_x4, draw_y4;
int32 draw_x5, draw_y5;
int32 draw_x6, draw_y6;
int32 draw_x7, draw_y7;
int32 fill_x0, fill_y0; // 填充所需的变量，使用垂直线填充
int32 fill_x1;
int32 xx, yy; // 画圆控制变量
int32 di; // 决策变量
/* 参数过滤 */
if(0==r)
return;
/* 计算出4个特殊点(0、90、180、270度)，进行显示 */
draw_x0 = draw_x1 = x0;
draw_y0 = draw_y1 = y0 + r;
if(draw_y0<GUI_LCM_YMAX)
{
GUI_Point(draw_x0, draw_y0, color); // 90度
}
draw_x2 = draw_x3 = x0;
draw_y2 = draw_y3 = y0 - r;
if(draw_y2>=0)
{
GUI_Point(draw_x2, draw_y2, color); // 270度
}
draw_x4 = draw_x6 = x0 + r;
draw_y4 = draw_y6 = y0;
if(draw_x4<GUI_LCM_XMAX)
{
GUI_Point(draw_x4, draw_y4, color); // 0度
fill_x1 = draw_x4;
}
else
{
fill_x1 = GUI_LCM_XMAX;
}
fill_y0 = y0; // 设置填充线条起始点fill_x0
fill_x0 = x0 - r; // 设置填充线条结束点fill_y1
if(fill_x0<0)
fill_x0 = 0;
GUI_HLine(fill_x0, fill_y0, fill_x1, color);
draw_x5 = draw_x7 = x0 - r;
draw_y5 = draw_y7 = y0;
if(draw_x5>=0)
{
GUI_Point(draw_x5, draw_y5, color); // 180度
}
if(1==r)
return;
/* 使用Bresenham法进行画圆 */
di = 3 - 2*r; // 初始化决策变量
xx = 0;
yy = r;
while(xx<yy)
{
if(di<0)
{
di += 4*xx + 6;
}
else
{
di += 4*(xx - yy) + 10;
yy--;
draw_y0--;
draw_y1--;
draw_y2++;
draw_y3++;
draw_x4--;
draw_x5++;
draw_x6--;
draw_x7++;
}
xx++;
draw_x0++;
draw_x1--;
draw_x2++;
draw_x3--;
draw_y4++;
draw_y5++;
draw_y6--;
draw_y7--;
/* 要判断当前点是否在有效范围内 */
if( (draw_x0<=GUI_LCM_XMAX)&&(draw_y0>=0) )
{
GUI_Point(draw_x0, draw_y0, color);
}
if( (draw_x1>=0)&&(draw_y1>=0) )
{
GUI_Point(draw_x1, draw_y1, color);
}
/* 第二点水直线填充(下半圆的点) */
if(draw_x1>=0)
{ /* 设置填充线条起始点fill_x0 */
fill_x0 = draw_x1;
/* 设置填充线条起始点fill_y0 */
fill_y0 = draw_y1;
if(fill_y0>GUI_LCM_YMAX)
fill_y0 = GUI_LCM_YMAX;
if(fill_y0<0)
fill_y0 = 0;
/* 设置填充线条结束点fill_x1 */
fill_x1 = x0*2 - draw_x1;
if(fill_x1>GUI_LCM_XMAX)
fill_x1 = GUI_LCM_XMAX;
GUI_HLine(fill_x0, fill_y0, fill_x1, color);
}
if( (draw_x2<=GUI_LCM_XMAX)&&(draw_y2<=GUI_LCM_YMAX) )
{
GUI_Point(draw_x2, draw_y2, color);
}
if( (draw_x3>=0)&&(draw_y3<=GUI_LCM_YMAX) )
{
GUI_Point(draw_x3, draw_y3, color);
}
/* 第四点垂直线填充(上半圆的点) */
if(draw_x3>=0)
{ /* 设置填充线条起始点fill_x0 */
fill_x0 = draw_x3;
/* 设置填充线条起始点fill_y0 */
fill_y0 = draw_y3;
if(fill_y0>GUI_LCM_YMAX)
fill_y0 = GUI_LCM_YMAX;
if(fill_y0<0)
fill_y0 = 0;
/* 设置填充线条结束点fill_x1 */
fill_x1 = x0*2 - draw_x3;
if(fill_x1>GUI_LCM_XMAX)
fill_x1 = GUI_LCM_XMAX;
GUI_HLine(fill_x0, fill_y0, fill_x1, color);
}
if( (draw_x4<=GUI_LCM_XMAX)&&(draw_y4>=0) )
{
GUI_Point(draw_x4, draw_y4, color);
}
if( (draw_x5>=0)&&(draw_y5>=0) )
{
GUI_Point(draw_x5, draw_y5, color);
}
/* 第六点垂直线填充(上半圆的点) */
if(draw_x5>=0)
{ /* 设置填充线条起始点fill_x0 */
fill_x0 = draw_x5;
/* 设置填充线条起始点fill_y0 */
fill_y0 = draw_y5;
if(fill_y0>GUI_LCM_YMAX)
fill_y0 = GUI_LCM_YMAX;
if(fill_y0<0)
fill_y0 = 0;
/* 设置填充线条结束点fill_x1 */
fill_x1 = x0*2 - draw_x5;
if(fill_x1>GUI_LCM_XMAX)
fill_x1 = GUI_LCM_XMAX;
GUI_HLine(fill_x0, fill_y0, fill_x1, color);
}
if( (draw_x6<=GUI_LCM_XMAX)&&(draw_y6<=GUI_LCM_YMAX) )
{
GUI_Point(draw_x6, draw_y6, color);
}
if( (draw_x7>=0)&&(draw_y7<=GUI_LCM_YMAX) )
{
GUI_Point(draw_x7, draw_y7, color);
}
/* 第八点垂直线填充(上半圆的点) */
if(draw_x7>=0)
{ /* 设置填充线条起始点fill_x0 */
fill_x0 = draw_x7;
/* 设置填充线条起始点fill_y0 */
fill_y0 = draw_y7;
if(fill_y0>GUI_LCM_YMAX)
fill_y0 = GUI_LCM_YMAX;
if(fill_y0<0)
fill_y0 = 0;
/* 设置填充线条结束点fill_x1 */
fill_x1 = x0*2 - draw_x7;
if(fill_x1>GUI_LCM_XMAX)
fill_x1 = GUI_LCM_XMAX;
GUI_HLine(fill_x0, fill_y0, fill_x1, color);
}
}
}
#endif
#if GUI_EllipseX_EN==1
/****************************************************************************
* 名称：GUI_Ellipse()
* 功能：画正椭圆。给定椭圆的四个点的参数，最左、最右点的x轴坐标值为x0、x1，最上、最下点
* 的y轴坐标为y0、y1。
* 入口参数：x0 最左点的x坐标值
* x1 最右点的x坐标值
* y0 最上点的y坐标值
* y1 最下点的y坐标值
* color 显示颜色
* 出口参数：无
* 说明：操作失败原因是指定地址超出有效范围。
****************************************************************************/
void GUI_Ellipse(uint32 x0, uint32 x1, uint32 y0, uint32 y1, TCOLOR color)
{
int32 draw_x0, draw_y0; // 刽图点坐标变量
int32 draw_x1, draw_y1;
int32 draw_x2, draw_y2;
int32 draw_x3, draw_y3;
int32 xx, yy; // 画图控制变量
int32 center_x, center_y; // 椭圆中心点坐标变量
int32 radius_x, radius_y; // 椭圆的半径，x轴半径和y轴半径
int32 radius_xx, radius_yy; // 半径乘平方值
int32 radius_xx2, radius_yy2; // 半径乘平方值的两倍
int32 di; // 定义决策变量
/* 参数过滤 */
if( (x0==x1) || (y0==y1) )
return;
/* 计算出椭圆中心点坐标 */
center_x = (x0 + x1) >> 1;
center_y = (y0 + y1) >> 1;
/* 计算出椭圆的半径，x轴半径和y轴半径 */
if(x0 > x1)
{
radius_x = (x0 - x1) >> 1;
}
else
{
radius_x = (x1 - x0) >> 1;
}
if(y0 > y1)
{
radius_y = (y0 - y1) >> 1;
}
else
{
radius_y = (y1 - y0) >> 1;
}
/* 计算半径平方值 */
radius_xx = radius_x * radius_x;
radius_yy = radius_y * radius_y;
/* 计算半径平方值乘2值 */
radius_xx2 = radius_xx<<1;
radius_yy2 = radius_yy<<1;
/* 初始化画图变量 */
xx = 0;
yy = radius_y;
di = radius_yy2 + radius_xx - radius_xx2*radius_y ; // 初始化决策变量
/* 计算出椭圆y轴上的两个端点坐标，作为作图起点 */
draw_x0 = draw_x1 = draw_x2 = draw_x3 = center_x;
draw_y0 = draw_y1 = center_y + radius_y;
draw_y2 = draw_y3 = center_y - radius_y;
GUI_Point(draw_x0, draw_y0, color); // 画y轴上的两个端点
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