📄 gui_basic.c
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/****************************************************************************
* 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
GUI_Point(draw_x2, draw_y2, color);
while( (radius_yy*xx) < (radius_xx*yy) )
{ if(di<0)
{ di+= radius_yy2*(2*xx+3);
}
else
{ di += radius_yy2*(2*xx+3) + 4*radius_xx - 4*radius_xx*yy;
yy--;
draw_y0--;
draw_y1--;
draw_y2++;
draw_y3++;
}
xx ++; // x轴加1
draw_x0++;
draw_x1--;
draw_x2++;
draw_x3--;
GUI_Point(draw_x0, draw_y0, color);
GUI_Point(draw_x1, draw_y1, color);
GUI_Point(draw_x2, draw_y2, color);
GUI_Point(draw_x3, draw_y3, color);
}
di = radius_xx2*(yy-1)*(yy-1) + radius_yy2*xx*xx + radius_yy + radius_yy2*xx - radius_xx2*radius_yy;
while(yy>=0)
{ if(di<0)
{ di+= radius_xx2*3 + 4*radius_yy*xx + 4*radius_yy - 2*radius_xx2*yy;
xx ++; // x轴加1
draw_x0++;
draw_x1--;
draw_x2++;
draw_x3--;
}
else
{ di += radius_xx2*3 - 2*radius_xx2*yy;
}
yy--;
draw_y0--;
draw_y1--;
draw_y2++;
draw_y3++;
GUI_Point(draw_x0, draw_y0, color);
GUI_Point(draw_x1, draw_y1, color);
GUI_Point(draw_x2, draw_y2, color);
GUI_Point(draw_x3, draw_y3, color);
}
}
/****************************************************************************
* 名称：GUI_EllipseFill()
* 功能：画正椭圆，并填充。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 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_EllipseFill(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;
}
/* 计算半径乘平方值 */
radius_xx = radius_x * radius_x;
radius_yy = radius_y * radius_y;
/* 计算半径乘4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
GUI_Point(draw_x2, draw_y2, color);
while( (radius_yy*xx) < (radius_xx*yy) )
{ if(di<0)
{ di+= radius_yy2*(2*xx+3);
}
else
{ di += radius_yy2*(2*xx+3) + 4*radius_xx - 4*radius_xx*yy;
yy--;
draw_y0--;
draw_y1--;
draw_y2++;
draw_y3++;
}
xx ++; // x轴加1
draw_x0++;
draw_x1--;
draw_x2++;
draw_x3--;
GUI_Point(draw_x0, draw_y0, color);
GUI_Point(draw_x1, draw_y1, color);
GUI_Point(draw_x2, draw_y2, color);
GUI_Point(draw_x3, draw_y3, color);
/* 若y轴已变化，进行填充 */
if(di>=0)
{ GUI_HLine(draw_x0, draw_y0, draw_x1, color);
GUI_HLine(draw_x2, draw_y2, draw_x3, color);
}
}
di = radius_xx2*(yy-1)*(yy-1) + radius_yy2*xx*xx + radius_yy + radius_yy2*xx - radius_xx2*radius_yy;
while(yy>=0)
{ if(di<0)
{ di+= radius_xx2*3 + 4*radius_yy*xx + 4*radius_yy - 2*radius_xx2*yy;
xx ++; // x轴加1
draw_x0++;
draw_x1--;
draw_x2++;
draw_x3--;
}
else
{ di += radius_xx2*3 - 2*radius_xx2*yy;
}
yy--;
draw_y0--;
draw_y1--;
draw_y2++;
draw_y3++;
GUI_Point(draw_x0, draw_y0, color);
GUI_Point(draw_x1, draw_y1, color);
GUI_Point(draw_x2, draw_y2, color);
GUI_Point(draw_x3, draw_y3, color);
/* y轴已变化，进行填充 */
GUI_HLine(draw_x0, draw_y0, draw_x1, color);
GUI_HLine(draw_x2, draw_y2, draw_x3, color);
}
}
#endif
#if GUI_FloodFill_EN==1
/****************************************************************************
* 名称：GUI_ReadLeftPoint()
* 功能：找出指定点左边最近的非color点。
* 入口参数： x0 指定点的x坐标值
* y0 指定点的y坐标值
* color 指定颜色值
* 出口参数：返回该点的x轴坐标值。
* 说明：若没有找出，则返回最左的x坐标0。
****************************************************************************/
uint32 GUI_ReadLeftPoint(uint32 x0, uint32 y0, TCOLOR color)
{ uint32 i;
TCOLOR bakc;
for(i=x0-1; i>0; i--)
{ GUI_ReadPoint(i, y0, &bakc);
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