canvasframe.cpp

《Visual C++游戏设计入门》配套代码

// canvasFrame.cpp : implementation file
//

#include "stdafx.h"
#include "canvasr.h"
#include "canvasFrame.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// canvasFrame

IMPLEMENT_DYNCREATE(canvasFrame, CFrameWnd)

canvasFrame::canvasFrame()
{
	Create(NULL,"绘图窗口");
	CClientDC dc(this);
	int width = dc.GetDeviceCaps(HORZRES);
	int height = dc.GetDeviceCaps(VERTRES);
	GetWindowRect( &rect );
	width = ( width - ( rect.right - rect.left ))/2 ;
	height = (height - (rect.bottom - rect.top ))/2 ;
	MoveWindow( width , height , (rect.right - rect.left ) , (rect.bottom - rect.top ) ,true);
	limpid(&dc);
}

canvasFrame::limpid(CDC *dc)
{
	BITMAP bm;            //声明bm为BITMAP数据结构
	int x,y,i=0;
	GetClientRect(&rect);
	mdc = new CDC;        
	bitmap = new CBitmap;
	bgbmp = new CBitmap;
	mdc->CreateCompatibleDC(dc); //建立与dc兼容的DC
	bgbmp->m_hObject = (HBITMAP)::LoadImage(NULL,"bground.bmp",IMAGE_BITMAP,rect.right,rect.bottom,LR_LOADFROMFILE); //载入背景图
	bitmap->m_hObject = (HBITMAP)::LoadImage(NULL,"girl.bmp",IMAGE_BITMAP,298,329,LR_LOADFROMFILE); //载入源位图
	bitmap->GetObject(sizeof(BITMAP),&bm); //取得 bitmap 位图的信息
	double *px = new double[bm.bmHeight*bm.bmWidthBytes]; //声明暂存数组
	bitmap->GetBitmapBits(bm.bmHeight*bm.bmWidthBytes,px); //取得源位图各像素点的 RGB 值存入 px 数组中
	for(y=0;y<bm.bmHeight;y++)
		for(x=0;x<bm.bmWidth;x++)
		{
			px[x*3+y*bm.bmWidthBytes] = px[x*3+y*bm.bmWidthBytes] *0.5;   //将 B 色彩值乘以 50%
			px[x*3+1+y*bm.bmWidthBytes] = px[x*3+1+y*bm.bmWidthBytes] *0.5; //将 G 色彩值乘以 50%
			px[x*3+2+y*bm.bmWidthBytes] = px[x*3+2+y*bm.bmWidthBytes] *0.5; //将 R 色彩值乘以 50%
		}
	bgbmp->GetObject(sizeof(BITMAP),&bm); //取得 bgbmp 位图的信息
	double *px1 = new double[bm.bmHeight*bm.bmWidthBytes];  //声明暂存数组
	bgbmp->GetBitmapBits(bm.bmHeight*bm.bmWidthBytes,px1); //取得源位图各像素点的 RGB 值存入 px1 数组中
	for(y=20;y<=348;y++)
		for(x=150;x<=447;x++)
		{
			px1[x*3+y*bm.bmWidthBytes] = px1[x*3+y*bm.bmWidthBytes]*0.5 + px[i]; //将 B 色彩值乘以 50% 并与 px 相加
			px1[x*3+1+y*bm.bmWidthBytes] = px1[x*3+1+y*bm.bmWidthBytes]*0.5 + px[i+1];//将 G 色彩值乘以 50% 并与 px 相加
			px1[x*3+2+y*bm.bmWidthBytes] = px1[x*3+2+y*bm.bmWidthBytes]*0.5 + px[i+2];//将 R 色彩值乘以 50% 并与 px 相加
			i=i+3;
		}
	bgbmp->SetBitmapBits(bm.bmHeight*bm.bmWidthBytes,px1); //重设背景图的颜色
	mdc->SelectObject(bgbmp);  //选择位图对象到mdc中
	delete px;
	delete px1;
}

canvasFrame::~canvasFrame()
{
	if(mdc) delete mdc;
	if(bgbmp) delete bgbmp;
	if(bitmap) delete bitmap;
}

BEGIN_MESSAGE_MAP(canvasFrame, CFrameWnd)
	//{{AFX_MSG_MAP(canvasFrame)
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// canvasFrame message handlers

void canvasFrame::OnPaint()
{
	CPaintDC dc(this);    //建立响应WM_PAINT信息的DC
	dc.BitBlt(0,0,rect.right,rect.bottom,mdc,0,0,SRCCOPY);
}