STN液晶驱动函数

/*
================================================================================
File Name : GUI_Type.H
Author : LiYOng
Date : 2008-12-12 15:51
Version : 1.0
Decription: This file offers some data type for GUI module
================================================================================
*/
#ifndef _GUI_TYPE_H_
#define _GUI_TYPE_H_
#define GUI_LCM_XMAX 127
#define GUI_LCM_YMAX 129
#define TCOLOR INT16U

typedef unsigned char INT8U;
typedef signed char INT8S;
typedef unsigned int INT16U;
typedef signed int INT16S;
typedef unsigned long INT32U;
typedef signed long INT32S;


/*Informations of a point*/
typedef struct
{
INT8U x;
INT8U y;
TCOLOR Color;
}POINT;

/*Informations of a line*/
typedef struct
{
INT8U xs;
INT8U xe;
INT8U ys;
INT8U ye;
TCOLOR Color;
}LINE;

/*Informations of a dollop*/
typedef struct
{
INT8U xs;
INT8U xe;
INT8U ys;
INT8U ye;
TCOLOR Color;
}DOLLOP;

/*Informations of a character*/
typedef struct
{
INT8U Height;
INT8U Width;
TCOLOR Color;
TCOLOR BackColor;
}FONT;

/*Informations of a bit block*/
typedef struct
{
INT8U xs;
INT8U ys;
INT8U Width;
INT8U Height;
TCOLOR Color;
TCOLOR BackColor;
INT8U *pData;
}BitBlock;

/*Informations of a rectangle*/
typedef struct
{
INT8U xs;
INT8U ys;
INT8U xe;
INT8U ye;
TCOLOR Color;
}RECT;

/*Informations of a circle*/
typedef struct
{
INT8U x;
INT8U y;
INT8U r;
TCOLOR Color;
}CIRCLE;

/*Informations of a ellipse*/
typedef struct
{
INT8U xs;
INT8U xe;
INT8U ys;
INT8U ye;
TCOLOR Color;
}ELLIPSE;

/*Informations of a image*/
typedef struct
{
INT8U xs;
INT8U ys;
INT8U height;
INT8U length;
INT8U *pData;
}IMAGE;

#endif//_GUI_TYPE_H_
/*
================================================================================
====================================End of file=================================
================================================================================
*/





/*
================================================================================
File Name : GUI_Basic.c
Author : LiYOng
Date : 2008-12-12 15:51
Version : 1.0
Decription: This file contains some basic functions for GUI, It need the LCD
Drive functions
================================================================================
*/
#ifndef _GUI_BASIC_H_
#define _GUI_BASIC_H_

#include "GUI_Type.h"

/*
================================================================================
Important Notes :
There are servral GUI functions in this file, The low level functions related
to the LCD harware and the BitMap / FontLib, You mast use a special method to
catch them, The method must be :
Catch By ROWs:
(BYTE0)7,6,5,4,3,2,1,0,(BYTE1)7,6,5,4,3,2,1,0,(BYTE2)7,6,5,4...
(BYTE3)7,6,5,4,3,2,1,0,(BYTE4)7,6,5,4,3,2,1,0,(BYTE5)7,6,5,4...
.

.
.
LEFT --> RIGHT, TOP --> BOTTOM
if you use another font libs, you must change the functions to support them.
================================================================================
*/
/*
================================================================================
External IMPORT function list, you must offer all of them as LCD driver. About the
data type, Please refer to GUI_Type.H

extern void LCDDrawDollop( DOLLOP* dollop ); //draw a dollop with single color
extern void LCDDrawPoint( POINT* pPoint );//draw a point
extern void LCDDrawHRLine( LINE* pLine ); //draw a direct line
extern void PrintBitBlock( BitBlock *pBitBlock );//draw a bitmap with single color
================================================================================
*/
#include
/*
================================================================================
Export function list
================================================================================
*/
/*Initialize GUI with single color*/
void GUI_Inital( TCOLOR Color );

/*Draw a rectangle*/
void GUI_DrawRectangle( RECT* pRect );

/*Draw a line*/
void GUI_DrawLine( LINE* pLine );

/*Display a character*/
void GUI_DisplayFont( INT8U Xs, INT8U Ys, FONT* pFont, char Character );

/*Display a string*/
void GUI_DisplayStr( INT8U xs, INT8U ys, FONT* pFont, char* Str );

/*Draw a cycle*/
void GUI_DrawCircle( CIRCLE* pCircle );

/*Draw a cycle and fill its color*/
void GUI_DrawCircleFill( CIRCLE* pCircle );

/*Draw a ellipse*/
void GUI_DrawEllipse( ELLIPSE* pEllipse );

/*Draw a ellipse and fill its color*/
void GUI_DrawEllipseFill( ELLIPSE* pEllipse );

/*Draw a line*/
void GUI_DrawLine( LINE* pLine );

#endif//_GUI_BASIC_H_
/*
================================================================================
=======================================End of file==============================
================================================================================
*/







/*
================================================================================
File Name : GUI_Basic.c
Author : LiYOng
Date : 2008-12-12 15:51
Version : 1.0
Decription: This file contains some basic functions for GUI, It need the LCD
Drive functions
================================================================================
*/
#include "GUI_Basic.H"
#include "GUI_Type.H"
#include "fontlib.h"
/*
================================================================================
Function : GUI_DrawRectangle( )
Description : Draw a rectangle
Input : -pRect, point to a rectangle structure
output : None
================================================================================
*/
void GUI_DrawRectangle( RECT* pRect )
{
LINE line;

line.xs = pRect->xs;
line.xe = pRect->xe;
line.ys = pRect->ys;
line.ye = pRect->ys;
line.Color = pRect->Color;
LCDDrawH

RLine( &line );

line.xe = pRect->xs;
line.ye = pRect->ye;
LCDDrawHRLine( &line );

line.xs = pRect->xe;
line.ys = pRect->ye;
LCDDrawHRLine( &line );

line.xe = pRect->xe;
line.ye = pRect->ys;
LCDDrawHRLine( &line );
}
/*
================================================================================
Function : GUI_DrawLine( )
Description : Draw a line
Input : -pLine, point to a line structure
output : None
================================================================================
*/
void GUI_DrawLine( LINE* pLine )
{
INT32S dx; // 直线x轴差值变量
INT32S dy; // 直线y轴差值变量
INT32S dx_sym; // x轴增长方向，为-1时减值方向，为1时增值方向
INT32S dy_sym; // y轴增长方向，为-1时减值方向，为1时增值方向
INT32S dx_x2; // dx*2值变量，用于加快运算速度
INT32S dy_x2; // dy*2值变量，用于加快运算速度
INT32S di; // 决策变量

POINT point;
LINE line;

line.xs = pLine->xs;
line.ys = pLine->ys;
line.xe = pLine->xe;
line.ye = pLine->ye;
line.Color = pLine->Color;

point.Color = pLine->Color;

dx = line.xe - line.xs;
dy = line.ye - line.ys;

/* 判断增长方向，或是否为水平线、垂直线、点 */
if( dx > 0 ) // 判断x轴方向
{
dx_sym = 1; // dx>0，设置dx_sym=1
}
else
{
if( dx < 0 )
{
dx_sym = -1; // dx<0，设置dx_sym=-1
}
else
{
LCDDrawHRLine( &line );
return;
}
}

if( dy > 0 ) // 判断y轴方向
{
dy_sym = 1; // dy>0，设置dy_sym=1
}
else
{
if( dy < 0 )
{
dy_sym = -1; // dy<0，设置dy_sym=-1
}
else
{ // dy==0，画水平线，或一点
LCDDrawHRLine( &line );
return;
}
}

/* 将dx、dy取绝对值 */
dx = dx_sym * dx;
dy = dy_sym * dy;

/* 计算2倍的dx及dy值 */
dx_x2 = dx*2;
dy_x2 = dy*2;

/* 使用Bresenham法进行画直线 */
if( dx >= dy ) // 对于dx>=dy，则使用x轴为基准
{
di = dy_x2 - dx;
while( line.xs != line.xe )
{
point.x = line.xs;
point.y = line.ys;
LCDDrawPoint( &point );
line.xs += dx_sym;
if( di < 0 )
{
di += dy_x2; // 计算出下一步的决策值
}
else
{
di += dy_x2 - dx_x2;
line.ys += dy_sym;
}
}
LCDDrawPoint( &point ); // 显示最后一点
}
else // 对于dx{
di = dx_x2 - dy;
while( line.ys != line.ye )
{
point.x = line.xs;
point.y = line.ys;
LCDDrawPoint( &point );
line.ys += dy_sym;
if(di<0)
{
di += dx_x2;
}
else
{
di += dx_x2 - dy_x2;
line.xs += dx_sym;
}
}
LCDDrawPoint( &point ); // 显示最后一点
}
}
/*
================================================================================
Name: PrintFont
Function: Display a charact

er at a special area
Input: 1.Xs : Start position X
2.Ys : Start position Y
3.pFont : A pointer of a font structure
4.Character : The ASCII code of the character.
Output: None
Note: The start position is inputted as a parameter, And the end position is calculated by the FONT
structure.
Author: LiYong
Date : 2008.08.09
================================================================================
*/
void GUI_DisplayFont( INT8U Xs, INT8U Ys, FONT* pFont, char Character )
{
BitBlock Block;
INT32U Bytes;
INT8U DataBuffer[64];
INT8U i;
const unsigned char *offset;

Block.Height = pFont->Height;
Block.Width = pFont->Width;
Block.Color = pFont->Color;
Block.BackColor = pFont->BackColor;
Block.xs = Xs;
Block.ys = Ys;

Bytes = pFont->Width >> 3;
if( pFont->Width & 0x07 )
{
Bytes ++;
}
Bytes *= pFont->Height;
Bytes *= Character - ' ';
offset = (const unsigned char*)&FontLib_14;
/*
if( pFont->Height == 18 )
{
offset = (const unsigned char*)&FontLib_18;
}
else if( pFont->Height == 14 )
{
offset = (const unsigned char*)&FontLib_14;
}
else
{
return;
}
*/
offset += Bytes;
for( i = 0; i < 36; i ++ )
{
DataBuffer[i] = *( offset + i );
}


Block.pData = DataBuffer;

PrintBitBlock( &Block );
}
/*
========================================================================================================
Name: DisplayStr
Function: Display a character at a special area
Input:
1.Xs : Start position X
2.Ys : Start position Y
3.pFont : A pointer of a font structure
4.Str : The start address of a string
Output: None
Note: The start position is inputted as a parameter, And the end position is calculated by the FONT
structure.
Author: LiYong
Date : 2008.08.09
========================================================================================================
*/
void GUI_DisplayStr( INT8U xs, INT8U ys, FONT* pFont, char* Str )
{
while( *Str )
{
GUI_DisplayFont( xs, ys, pFont, *Str );
Str ++;
xs += pFont->Width;
}
}
/*
================================================================================
Name: GUI_DrawCircle( )
Function: Display a cycle at a special area
Input: -pCycle, A pinter point to a cycle structure
Output: None
Author: LiYong
Date : 2008.08.09
================================================================================
*/
void GUI_DrawCircle( CIRCLE* pCircle )
{
INT8S draw_x0, draw_y0; // 刽图点坐标变量
INT8S draw_x1, draw_y1;
INT8S draw_x2, draw_y2;
INT8S draw_x3, draw_y3;
INT8S draw_x4, draw_y4;
INT8S draw_x5, draw_y5;
INT8S draw_x6, draw_y6;
INT8S draw_x7, draw_y7;
INT8S xx, yy; // 画圆控制变量

INT8S di; // 决策变量
POINT point;

point.Color = pCircle->Color;

/* 参数过滤 */
if(0 == pCircle->r ) return;

/* 计算出8个特殊点(0、45、90、135、180、225、270度)

，进行显示 */
point.x = draw_x0 = draw_x1 = pCircle->x;
point.y = draw_y0 = draw_y1 = pCircle->y + pCircle->r;

if( draw_y0 < GUI_LCM_YMAX ) LCDDrawPoint( &point ); // 90度

point.x = draw_x2 = draw_x3 = pCircle->x;
point.y = draw_y2 = draw_y3 = pCircle->y - pCircle->r;
if( draw_y2 >= 0 ) LCDDrawPoint( &point ); // 270度


point.x = draw_x4 = draw_x6 = pCircle->x + pCircle->r;
point.y = draw_y4 = draw_y6 = pCircle->y;
if(draw_x4
point.x = draw_x5 = draw_x7 = pCircle->x - pCircle->r;
point.y = draw_y5 = draw_y7 = pCircle->y;
if(draw_x5>=0) LCDDrawPoint( &point ); // 180度
if(1==pCircle->r) return; // 若半径为1，则已圆画完


/* 使用Bresenham法进行画圆 */
di = 3 - 2*pCircle->r; // 初始化决策变量

xx = 0;
yy = pCircle->r;
while(xx{ 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) )
{
point.x = draw_x0;
point.y = draw_y0;
LCDDrawPoint( &point );
}
if( (draw_x1>=0)&&(draw_y1>=0) )
{
point.x = draw_x1;
point.y = draw_y1;
LCDDrawPoint( &point );
}
if( (draw_x2<=GUI_LCM_XMAX)&&(draw_y2<=GUI_LCM_YMAX) )
{
point.x = draw_x2;
point.y = draw_y2;
LCDDrawPoint( &point );
}
if( (draw_x3>=0)&&(draw_y3<=GUI_LCM_YMAX) )
{
point.x = draw_x3;
point.y = draw_y3;
LCDDrawPoint( &point );
}
if( (draw_x4<=GUI_LCM_XMAX)&&(draw_y4>=0) )
{
point.x = draw_x4;
point.y = draw_y4;
LCDDrawPoint( &point );
}
if( (draw_x5>=0)&&(draw_y5>=0) )
{
point.x = draw_x5;
point.y = draw_y5;
LCDDrawPoint( &point );
}
if( (draw_x6<=GUI_LCM_XMAX)&&(draw_y6<=GUI_LCM_YMAX) )
{
point.x = draw_x6;
point.y = draw_y6;
LCDDrawPoint( &point );
}
if( (draw_x7>=0)&&(draw_y7<=GUI_LCM_YMAX) )
{
point.x = draw_x7;
point.y = draw_y7;
LCDDrawPoint( &point );
}
}
}
/*
================================================================================
Name: GUI_DrawCircleFill( )
Function: Display a cycle at a special area and fill its area
Input: -pCycle, A pinter point to a cycle structure
Output: None
Author: LiYong
Date : 2008.08.09
================================================================================
*/
void GUI_DrawCircleFill( CIRCLE* pCircle )
{
INT8S draw_x0, draw_y0; // 刽图点坐标变量
INT8S draw_x1, draw_y1;
INT8S draw_x2, draw_y2;
INT8S draw_x3, draw_y3;
INT8S d

raw_x4, draw_y4;
INT8S draw_x5, draw_y5;
INT8S draw_x6, draw_y6;
INT8S draw_x7, draw_y7;
INT8S fill_x0, fill_y0; // 填充所需的变量，使用垂直线填充
INT8S fill_x1;
INT8S xx, yy; // 画圆控制变量

INT8S di; // 决策变量
POINT point;
LINE line;

point.Color = pCircle->Color;
line.Color = pCircle->Color;



/* 参数过滤 */
if(0==pCircle->r) return;

/* 计算出4个特殊点(0、90、180、270度)，进行显示 */
point.x = draw_x0 = draw_x1 = pCircle->x;
point.y = draw_y0 = draw_y1 = pCircle->y + pCircle->r;
if(draw_y0{
LCDDrawPoint( &point );
}

point.x = draw_x2 = draw_x3 = pCircle->x;
point.y = draw_y2 = draw_y3 = pCircle->y - pCircle->r;
if(draw_y2>=0)
{
LCDDrawPoint( &point );
}

point.x = draw_x4 = draw_x6 = pCircle->x + pCircle->r;
point.y = draw_y4 = draw_y6 = pCircle->y;
if(draw_x4{
LCDDrawPoint( &point ); // 0度
fill_x1 = draw_x4;
}
else
{
fill_x1 = GUI_LCM_XMAX;
}
fill_y0 = pCircle->y; // 设置填充线条起始点fill_x0
fill_x0 = pCircle->x - pCircle->r; // 设置填充线条结束点fill_y1
if(fill_x0<0) fill_x0 = 0;
line.xs = fill_x0;
line.ys = fill_y0;
line.ye = fill_y0;
line.xe = fill_x1;
LCDDrawHRLine( &line );

point.x = draw_x5 = draw_x7 = pCircle->x - pCircle->r;
point.y = draw_y5 = draw_y7 = pCircle->y;
if(draw_x5>=0)
{
LCDDrawPoint( &point ); // 180度
}
if(1==pCircle->r) return;


/* 使用Bresenham法进行画圆 */
di = 3 - 2*pCircle->r; // 初始化决策变量

xx = 0;
yy = pCircle->r;
while(xx{ 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) )
{
point.x = draw_x0;
point.y = draw_y0;
LCDDrawPoint( &point );
}
if( (draw_x1>=0)&&(draw_y1>=0) )
{
point.x = draw_x1;
point.y = draw_y1;
LCDDrawPoint( &point );
}

/* 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 = pCircle->x*2 - draw_x1;
if(fill_x1>GUI_LCM_XMAX) fill_x1 = GUI_LCM_XMAX;

line.xs = fill_x0;
line.xe = fil

l_x1;
line.ys = line.ye = fill_y0;
LCDDrawHRLine( &line );
}


if( (draw_x2<=GUI_LCM_XMAX)&&(draw_y2<=GUI_LCM_YMAX) )
{
point.x = draw_x2;
point.y = draw_y2;
LCDDrawPoint( &point );
}

if( (draw_x3>=0)&&(draw_y3<=GUI_LCM_YMAX) )
{
point.x = draw_x3;
point.y = draw_y3;
LCDDrawPoint( &point );
}

/* 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 = pCircle->x*2 - draw_x3;
if(fill_x1>GUI_LCM_XMAX) fill_x1 = GUI_LCM_XMAX;

line.xs = fill_x0;
line.xe = fill_x1;
line.ys = line.ye = fill_y0;
LCDDrawHRLine( &line );
}


if( (draw_x4<=GUI_LCM_XMAX)&&(draw_y4>=0) )
{
point.x = draw_x4;
point.y = draw_y4;
LCDDrawPoint( &point );
}
if( (draw_x5>=0)&&(draw_y5>=0) )
{
point.x = draw_x5;
point.y = draw_y5;
LCDDrawPoint( &point );
}

/* 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 = pCircle->x*2 - draw_x5;
if(fill_x1>GUI_LCM_XMAX) fill_x1 = GUI_LCM_XMAX;
line.xs = fill_x0;
line.xe = fill_x1;
line.ys = line.ye = fill_y0;
LCDDrawHRLine( &line );
}


if( (draw_x6<=GUI_LCM_XMAX)&&(draw_y6<=GUI_LCM_YMAX) )
{
point.x = draw_x6;
point.y = draw_y6;
LCDDrawPoint( &point );
}

if( (draw_x7>=0)&&(draw_y7<=GUI_LCM_YMAX) )
{
point.x = draw_x7;
point.y = draw_y7;
LCDDrawPoint( &point );
}

/* 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 = pCircle->x*2 - draw_x7;
if(fill_x1>GUI_LCM_XMAX) fill_x1 = GUI_LCM_XMAX;
line.xs = fill_x0;
line.xe = fill_x1;
line.ys = line.ye = fill_y0;
LCDDrawHRLine( &line );
}

}
}
/*
================================================================================
Name: GUI_DrawEllipse( )
Function: Display a ellipse at a special area
Input: -pCycle, A pinter point to a ellipse

structure
Output: None
Author: LiYong
Date : 2008.08.09
================================================================================
*/
void GUI_DrawEllipse( ELLIPSE* pEllipse )
{
INT32S draw_x0, draw_y0; // 刽图点坐标变量
INT32S draw_x1, draw_y1;
INT32S draw_x2, draw_y2;
INT32S draw_x3, draw_y3;
INT32S xx, yy; // 画图控制变量

INT32S center_x, center_y; // 椭圆中心点坐标变量
INT32S radius_x, radius_y; // 椭圆的半径，x轴半径和y轴半径
INT32S radius_xx, radius_yy; // 半径乘平方值
INT32S radius_xx2, radius_yy2; // 半径乘平方值的两倍
INT32S di; // 定义决策变量

POINT point;

point.Color = pEllipse->Color;

/* 参数过滤 */
if( (pEllipse->xs == pEllipse->xe ) ||
(pEllipse->ys == pEllipse->ye ) ) return;

/* 计算出椭圆中心点坐标 */
center_x = (pEllipse->xs + pEllipse->xe) >> 1;
center_y = (pEllipse->ys + pEllipse->ye) >> 1;

/* 计算出椭圆的半径，x轴半径和y轴半径 */
if(pEllipse->xs > pEllipse->xe)
{ radius_x = (pEllipse->xs - pEllipse->xe) >> 1;
}
else
{ radius_x = (pEllipse->xe - pEllipse->xs) >> 1;
}
if(pEllipse->ys > pEllipse->ye)
{ radius_y = (pEllipse->ys - pEllipse->ye) >> 1;
}
else
{ radius_y = (pEllipse->ye - pEllipse->ys) >> 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;

point.x = draw_x0;
point.y = draw_y0;
LCDDrawPoint( &point );
point.x = draw_x2;
point.y = draw_y2;
LCDDrawPoint( &point ); // 画y轴上的两个端点

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--;

point.x = draw_x0;
point.y = draw_y0;
LCDDrawPoint( &point );
point.x = draw_x1;
point.y = draw_y1;
LCDDrawPoint( &point );
point.x = draw_x2;
point.y = draw_y2;
LCDDrawPoint( &point );
point.x = draw_x3;
point.y = draw_y3;
LCDDrawPoint( &point );
}

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_y

y - 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++;

point.x = draw_x0;
point.y = draw_y0;
LCDDrawPoint( &point );
point.x = draw_x1;
point.y = draw_y1;
LCDDrawPoint( &point );
point.x = draw_x2;
point.y = draw_y2;
LCDDrawPoint( &point );
point.x = draw_x3;
point.y = draw_y3;
LCDDrawPoint( &point );
}
}
/*
================================================================================
Name: GUI_DrawEllipseFill( )
Function: Display a ellipse at a special area and fill its area
Input: -pCycle, A pinter point to a ellipse structure
Output: None
Author: LiYong
Date : 2008.08.09
================================================================================
*/
void GUI_DrawEllipseFill( ELLIPSE* pEllipse )
{
INT32S draw_x0, draw_y0; // 刽图点坐标变量
INT32S draw_x1, draw_y1;
INT32S draw_x2, draw_y2;
INT32S draw_x3, draw_y3;
INT32S xx, yy; // 画图控制变量

INT32S center_x, center_y; // 椭圆中心点坐标变量
INT32S radius_x, radius_y; // 椭圆的半径，x轴半径和y轴半径
INT32S radius_xx, radius_yy; // 半径乘平方值
INT32S radius_xx2, radius_yy2; // 半径乘平方值的两倍
INT32S di; // 定义决策变量

POINT point;
LINE line;

point.Color = pEllipse->Color;
line.Color = pEllipse->Color;

/* 参数过滤 */
if( (pEllipse->xs==pEllipse->xe) ||
(pEllipse->ys==pEllipse->ye) ) return;

/* 计算出椭圆中心点坐标 */
center_x = (pEllipse->xs + pEllipse->xe) >> 1;
center_y = (pEllipse->ys + pEllipse->ye) >> 1;

/* 计算出椭圆的半径，x轴半径和y轴半径 */
if(pEllipse->xs > pEllipse->xe)
{
radius_x = (pEllipse->xs - pEllipse->xe) >> 1;
}
else
{
radius_x = (pEllipse->xe - pEllipse->xs) >> 1;
}
if(pEllipse->ys > pEllipse->ye)
{
radius_y = (pEllipse->ys - pEllipse->ye) >> 1;
}
else
{
radius_y = (pEllipse->ye - pEllipse->ys) >> 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;

point.x = draw_x0;
point.y = draw_y0;
LCDDrawPoint( &point );
point.x = draw_x2;
point.y = draw_y2;
LCDDrawPoint( &point );// 画y轴上的两个端点

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--;

point.x = draw_x0;
point.y = draw_y0;
LCDDrawPoint( &point );
point.x = draw_x1;
point.y = draw_y1;
LCDDrawPoint( &point );
point.x = draw_x2;
point.y = draw_y2;
LCDDrawPoint( &point );
point.x = draw_x3;
point.y = draw_y3;
LCDDrawPoint( &point );

/* 若y轴已变化，进行填充 */
if(di>=0)
{
line.xs = draw_x0;
line.xe = draw_x1;
line.ys = line.ye = draw_y0;
LCDDrawHRLine( &line );
line.xs = draw_x2;
line.xe = draw_x3;
line.ys = line.ye = draw_y2;
LCDDrawHRLine( &line );

}
}

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++;

point.x = draw_x0;
point.y = draw_y0;
LCDDrawPoint( &point );
point.x = draw_x1;
point.y = draw_y1;
LCDDrawPoint( &point );
point.x = draw_x2;
point.y = draw_y2;
LCDDrawPoint( &point );
point.x = draw_x3;
point.y = draw_y3;
LCDDrawPoint( &point );

/* y轴已变化，进行填充 */
line.xs = draw_x0;
line.xe = draw_x1;
line.ys = line.ye = draw_y0;
LCDDrawHRLine( &line );
line.xs = draw_x2;
line.xe = draw_x3;
line.ys = line.ye = draw_y2;
LCDDrawHRLine( &line );
}
}
/*
================================================================================
Name: GUI_Inital( )
Function: Initialize GUI with single color
Input: -Color, Initialize color
Output: None
Author: LiYong
Date : 2008.08.09
================================================================================
*/
void GUI_Inital( TCOLOR Color )
{
DOLLOP dollop;

dollop.xs = 0;
dollop.xe = GUI_LCM_XMAX;
dollop.ys = 0;
dollop.ye = GUI_LCM_YMAX;
dollop.Color = Color;

LCDDrawDollop( &dollop );
}