📄 drv_gui.c
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fill_y0 = draw_y3;
if(fill_y0>SCREEN_HIGHT) fill_y0 = SCREEN_HIGHT;
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>SCREEN_WIDTH) fill_x1 = SCREEN_WIDTH;
gui_hline(fill_x0, fill_y0, fill_x1);
}
if( (draw_x4<=SCREEN_WIDTH)&&(draw_y4>=0) )
{ gui_point(draw_x4, draw_y4);
}
if( (draw_x5>=0)&&(draw_y5>=0) )
{ gui_point(draw_x5, draw_y5);
}
// 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>SCREEN_HIGHT) fill_y0 = SCREEN_HIGHT;
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>SCREEN_WIDTH) fill_x1 = SCREEN_WIDTH;
gui_hline(fill_x0, fill_y0, fill_x1);
}
if( (draw_x6<=SCREEN_WIDTH)&&(draw_y6<=SCREEN_HIGHT) )
{ gui_point(draw_x6, draw_y6);
}
if( (draw_x7>=0)&&(draw_y7<=SCREEN_HIGHT) )
{ gui_point(draw_x7, draw_y7);
}
// 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>SCREEN_HIGHT) fill_y0 = SCREEN_HIGHT;
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>SCREEN_WIDTH) fill_x1 = SCREEN_WIDTH;
gui_hline(fill_x0, fill_y0, fill_x1);
}
}
}
//=============================================================================
/****************************************************************************
* 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)
{
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); // 画y轴上的两个端点
gui_point(draw_x2, draw_y2);
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);
gui_point(draw_x1, draw_y1);
gui_point(draw_x2, draw_y2);
gui_point(draw_x3, draw_y3);
}
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);
gui_point(draw_x1, draw_y1);
gui_point(draw_x2, draw_y2);
gui_point(draw_x3, draw_y3);
}
}
//=============================================================================
/****************************************************************************
* 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)
{
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); // 画y轴上的两个端点
gui_point(draw_x2, draw_y2);
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);
gui_point(draw_x1, draw_y1);
gui_point(draw_x2, draw_y2);
gui_point(draw_x3, draw_y3);
/* 若y轴已变化，进行填充 */
if(di>=0)
{ gui_hline(draw_x0, draw_y0, draw_x1);
gui_hline(draw_x2, draw_y2, draw_x3);
}
}
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);
gui_point(draw_x1, draw_y1);
gui_point(draw_x2, draw_y2);
gui_point(draw_x3, draw_y3);
/* y轴已变化，进行填充 */
gui_hline(draw_x0, draw_y0, draw_x1);
gui_hline(draw_x2, draw_y2, draw_x3);
}
}
//=================================================================================================
/******************************************************************************
Function: // void lcd_partclear(unsigned char x_start,unsigned char y_start,unsigned char x_end,unsigned char y_end)
Description: // clear screen
Calls: // none
Called By: // none
Table Accessed: // none
Table Updated: // none
Input: // none
Output: // none
Return: // void
Others: // none
******************************************************************************/
void lcd_partclear(unsigned char x_start,unsigned char y_start,unsigned char x_end,unsigned char y_end)
{
unsigned char i=0,j=0;
CmdWrite(0x00,0xc5); //Graphic mode
for(i=x_start;i<=x_end;i++)
{
for(j=y_start;j<=y_end;j++)
{
lcd_cursorxy(i,j);
DataWrite(0x00);
}
}
}
//=============================================================================
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