本文所讲只适合于RGB的位图。
一、这里介绍一个类SBCT_CManageImage,通过他可以将数据显示在图片上。
用法是:
先调用GetImageBaseInfo把要画的图的image传进来,然后调用GetNumAndShow来显示数字要位图上。
SBCT_CManageImage sbct_CManageImage;
sbct_CManageImage.GetImageBaseInfo
sbct_CManageImage.GetNumAndShow
二、原理
如下图所示,通过七个位图来控制显示出9个数字。
结合以下代码,我们以ShowEnable1为例,我们会调用AttachData,而AttachData就是把每个RGB像素点替换掉BufImage相应位置的数据。
以下代码为SBCT_CManageImage 类的头文件SBCT_ManageImage.h
// SBCT_ManageImage.h: interface for the SBCT_CManageImage class.
//
//////////////////////////////////////////////////////////////////////
#if !defined(AFX_MANAGEIMAGE_H__A20FC3CF_281F_4219_B0C7_FF400768C5D8__INCLUDED_)
#define AFX_MANAGEIMAGE_H__A20FC3CF_281F_4219_B0C7_FF400768C5D8__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
///////User edit/////////
#include <atlbase.h>
#ifdef SBT_WriteNumOnImage_SDK
#define SBCT_NumImage_EXPORTMDOE __declspec(dllexport)
#else
#define SBCT_NumImage_EXPORTMDOE __declspec(dllimport)
#endif
//////////////////////// RGB DATA STRUCT DEFINATION //////////////////////
typedef struct _STRU_COLOUR
{
BYTE blue;
BYTE green;
BYTE red;
BYTE A;
}STRU_COLOUR;
//////////////////////// Class of SBCT_CManageImage//////////////////////
class SBCT_NumImage_EXPORTMDOE SBCT_CManageImage
{
public:
SBCT_CManageImage();
virtual ~SBCT_CManageImage();
private:
void ShowEnable7(bool trueorfalse);
void ShowEnable6(bool trueorfalse);
void ShowEnable5(bool trueorfalse);
void ShowEnable4(bool trueorfalse);
void ShowEnable3(bool trueorfalse);
void ShowEnable2(bool trueorfalse);
void ShowEnable1(bool trueorfalse);
void AttachData(int i,int j,_STRU_COLOUR RGB);
void ShowNumChar(int px,int py,int num,int height,int width,int bold,STRU_COLOUR RGB);
int Numpx,Numpy,Numheight,Numwidth,Numbold;
STRU_COLOUR NumRGB;
BYTE * g_BufImage;
int g_ImageHeight,g_ImageWidth,g_ImageNByte;
public:
void GetNumAndShow(int PositionX,int PositionY,CComBSTR bstrnum);
void GetNumAndShow(int PositionX, int PositionY, CComBSTR bstrnum,int Height, int Width, int Bold, int Interval, STRU_COLOUR RGB);
void GetImageBaseInfo(BYTE *Image,int Height,int Width,int nByte);
};
#endif // !defined(AFX_MANAGEIMAGE_H__A20FC3CF_281F_4219_B0C7_FF400768C5D8__INCLUDED_)
SBCT_CManageImage.cpp
// SBCT_ManageImage.cpp: implementation of the SBCT_CManageImage class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "SBCT_ManageImage.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
SBCT_CManageImage::SBCT_CManageImage()
{
}
SBCT_CManageImage::~SBCT_CManageImage()
{
}
void SBCT_CManageImage::GetImageBaseInfo(BYTE *Image, int Height, int Width, int nByte)
{
g_ImageHeight = Height;
g_ImageWidth = Width;
g_ImageNByte = nByte;
g_BufImage = Image;
}
void SBCT_CManageImage::GetNumAndShow(int PositionX, int PositionY, CComBSTR bstrnum,int Height, int Width, int Bold, int Interval,STRU_COLOUR RGB)
{
CString str = bstrnum;
int strlength = str.GetLength();
int position=0;
int px = PositionX, py = PositionY;
int height=Height,width=Width,bold=Bold,interval=Interval;
STRU_COLOUR Rgb =RGB;
while(strlength--)
{
int num = (int)str.GetAt(position++)-48;
if(px+width >= g_ImageWidth)
{
px = 0;
py = py+Height+4 ; //the line interval is 4 pot
if(py >=g_ImageHeight) py =0;
}
ShowNumChar(px,py,num,height,width,bold,Rgb);
px = px+width+interval;
} //while(strlength--)
}
void SBCT_CManageImage::GetNumAndShow(int PositionX, int PositionY, CComBSTR bstrnum)
{
CString str = bstrnum;
int strlength = str.GetLength();
int position=0;
int px = PositionX, py = PositionY;
int height=21,width=15,bold=3,interval=5;
STRU_COLOUR Rgb;
Rgb.red = (BYTE) 255;
Rgb.green =(BYTE) 0;
Rgb.blue = (BYTE) 0;
if(g_ImageNByte==4)
Rgb.A = 255;
while(strlength--)
{
int num = (int)str.GetAt(position++)-48;
if(px + width>= g_ImageWidth)
{
px = 0;
py = py+height+4 ; //the line interval is 4 pot
if(py >= g_ImageHeight) py =0;
}
ShowNumChar(px,py,num,height,width,bold,Rgb);
px = px+width+interval;
} //while(strlength--)
}
void SBCT_CManageImage::ShowNumChar(int px,int py,int num, int height, int width,int bold, STRU_COLOUR RGB)
{
Numpx=px;Numpy=py;Numheight=height;Numwidth=width;Numbold=bold;
NumRGB=RGB;
switch(num)
{
case 0:
{
ShowEnable1(true);
ShowEnable2(true);
ShowEnable3(true);
ShowEnable4(true);
ShowEnable5(true);
ShowEnable6(true);
ShowEnable7(false);
break;
}
case 1:
{
ShowEnable1(false);
ShowEnable2(true);
ShowEnable3(true);
ShowEnable4(false);
ShowEnable5(false);
ShowEnable6(false);
ShowEnable7(false);
break;
}
case 2:
{
ShowEnable1(true);
ShowEnable2(true);
ShowEnable3(false);
ShowEnable4(true);
ShowEnable5(true);
ShowEnable6(false);
ShowEnable7(true);
break;
}
case 3:
{
ShowEnable1(true);
ShowEnable2(true);
ShowEnable3(true);
ShowEnable4(true);
ShowEnable5(false);
ShowEnable6(false);
ShowEnable7(true);
break;
}
case 4:
{
ShowEnable1(false);
ShowEnable2(true);
ShowEnable3(true);
ShowEnable4(false);
ShowEnable5(false);
ShowEnable6(true);
ShowEnable7(true);
break;
}
case 5:
{
ShowEnable1(true);
ShowEnable2(false);
ShowEnable3(true);
ShowEnable4(true);
ShowEnable5(false);
ShowEnable6(true);
ShowEnable7(true);
break;
}
case 6:
{
ShowEnable1(true);
ShowEnable2(false);
ShowEnable3(true);
ShowEnable4(true);
ShowEnable5(true);
ShowEnable6(true);
ShowEnable7(true);
break;
}
case 7:
{
ShowEnable1(true);
ShowEnable2(true);
ShowEnable3(true);
ShowEnable4(false);
ShowEnable5(false);
ShowEnable6(false);
ShowEnable7(false);
break;
}
case 8:
{
ShowEnable1(true);
ShowEnable2(true);
ShowEnable3(true);
ShowEnable4(true);
ShowEnable5(true);
ShowEnable6(true);
ShowEnable7(true);
break;
}
case 9:
{
ShowEnable1(true);
ShowEnable2(true);
ShowEnable3(true);
ShowEnable4(true);
ShowEnable5(false);
ShowEnable6(true);
ShowEnable7(true);
break;
}
}//switch(num)
}
void SBCT_CManageImage::AttachData(int i, int j,STRU_COLOUR RGB)
{
int offset=(i*g_ImageWidth+j)*g_ImageNByte;
BYTE* pTmpBuffer = g_BufImage + offset;
if(g_ImageNByte==4) memcpy(pTmpBuffer,&RGB,4);
else memcpy(pTmpBuffer,&RGB,3);
}
void SBCT_CManageImage::ShowEnable1(bool trueorfalse)
{
if(trueorfalse)
for(int i= Numpy;i<Numpy+Numbold;i++)
for(int j=Numpx;j<Numpx+Numwidth;j++)
AttachData(i,j,NumRGB);
}
void SBCT_CManageImage::ShowEnable2(bool trueorfalse)
{
if(trueorfalse)
for(int i=Numpy;i<Numpy+Numheight/2+Numbold/2;i++)
for(int j=Numpx+Numwidth-Numbold;j<Numpx+Numwidth;j++)
AttachData(i,j,NumRGB);
}
void SBCT_CManageImage::ShowEnable3(bool trueorfalse)
{
if(trueorfalse)
for(int i=Numpy+Numheight/2-Numbold/2;i<Numpy+Numheight;i++)
for(int j=Numpx+Numwidth-Numbold;j<Numpx+Numwidth;j++)
AttachData(i,j,NumRGB);
}
void SBCT_CManageImage::ShowEnable4(bool trueorfalse)
{
if(trueorfalse)
for(int i=Numpy+Numheight-Numbold;i<Numpy+Numheight;i++)
for(int j=Numpx;j<Numpx+Numwidth;j++)
AttachData(i, j,NumRGB);
}
void SBCT_CManageImage::ShowEnable5(bool trueorfalse)
{
if(trueorfalse)
for(int i=Numpy+Numheight/2-Numbold/2;i<Numpy+Numheight;i++)
for(int j=Numpx;j<Numpx+Numbold;j++)
AttachData(i,j,NumRGB);
}
void SBCT_CManageImage::ShowEnable6(bool trueorfalse)
{
if(trueorfalse)
for(int i=Numpy;i<Numpy+Numheight/2+Numbold/2;i++)
for(int j=Numpx;j<Numpx+Numbold;j++)
AttachData(i, j,NumRGB);
}
void SBCT_CManageImage::ShowEnable7(bool trueorfalse)
{
if(trueorfalse)
for(int i=Numpy+Numheight/2-Numbold/2;i<Numpy+Numheight/2+Numbold-Numbold/2;i++)
for(int j=Numpx;j<Numpx+Numwidth;j++)
AttachData(i,j,NumRGB);
}