wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = (WNDPROC)WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = NULL;
wcex.hCursor = NULL;
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "canvas";
wcex.hIconSm = NULL;

return RegisterClassEx(&wcex);
}

//****初始化函数*************************************
// 加载位图资源并取得内部窗口区域信息
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HBITMAP bmp;
hInst = hInstance;

hWnd = CreateWindow("canvas", "浅墨的窗口" , WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

if (!hWnd)
{
return FALSE;
}

MoveWindow(hWnd,10,10,600,450,true);
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);

hdc = GetDC(hWnd);
mdc = CreateCompatibleDC(hdc);
bufdc = CreateCompatibleDC(hdc);
bmp = CreateCompatibleBitmap(hdc,640,480);

SelectObject(mdc,bmp);

bg = (HBITMAP)LoadImage(NULL,"bg.bmp",IMAGE_BITMAP,640,480,LR_LOADFROMFILE);
bird = (HBITMAP)LoadImage(NULL,"angrybird.bmp",IMAGE_BITMAP,120,60,LR_LOADFROMFILE);

GetClientRect(hWnd,&rect); //取得内部窗口区域的大小
MyPaint(hdc);

return TRUE;
}

//****自定义绘图函数*********************************
// 1.进行窗口贴图
// 2.计算小鸟贴图坐标并判断小鸟是否碰到窗口边沿
void MyPaint(HDC hdc)
{
SelectObject(bufdc,bg);
BitBlt(mdc,0,0,640,480,bufdc,0,0,SRCCOPY);

SelectObject(bufdc,bird);
BitBlt(mdc,x,y,60,60,bufdc,60,0,SRCAND);
BitBlt(mdc,x,y,60,60,bufdc,0,0,SRCPAINT);

BitBlt(hdc,0,0,640,480,mdc,0,0,SRCCOPY);

//计算X轴贴图坐标与速度
x += vx;
if(x <= 0)
{
x = 0;
vx = -vx;
}
else if(x >= rect.right-60)
{
x = rect.right - 60;
vx = -vx;
}

//计算Y轴贴图坐标与速度
y += vy;
if(y<=0)
{
y = 0;
vy = -vy;
}
else if(y >= rect.bottom-60)
{
y = rect.bottom - 60;
vy = -vy;
}

tPre = GetTickCount(); //记录此次绘图时间
}

////****消息处理函数***********************************
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_KEYDOWN: //按键消息
if(wParam==VK_ESCAPE) //按下【Esc】键
PostQuitMessage(0);
break;
case WM_DESTROY: //窗口结束消息
DeleteDC(mdc);
DeleteDC(bufdc);
DeleteObject(bg);
DeleteObject(bird);
ReleaseDC(hWnd,hdc);
PostQuitMessage(0);
break;
default: //其他消息
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}

运行时会带有幻影的错觉，实际上是因为这样的动画实现方式比较简单。

毕竟画面不是我们目前所追求的东西，目前我们主要学的是思想，关于华丽的游戏画面，这将是我们在后面的DirectX与游戏引擎中才需要讲究的东西。

下面是运行的截图：

作者：zhmxy555