win32编程 三缓冲 实现透明贴图
一、收获
1. 三缓冲贴图：
//以贴背景图为例 //1.获取DC g_hdc = GetDC(hwnd); //2.创建兼容DC g_mdc = CreateCompatibleDC(g_hdc); g_bufdc = CreateCompatibleDC(g_hdc); //创建一个和窗口兼容的位图对象 HBITMAP hBitMap = CreateCompatibleBitmap(g_hdc, WINDOW_WIDTH, WINDOW_HEIGHT); SelectObject(g_mdc, hBitMap); //3.加载位图· g_hBackGround = (HBITMAP)LoadImage(NULL, _T("bg.bmp"), IMAGE_BITMAP, WINDOW_WIDTH, WINDOW_HEIGHT, LR_LOADFROMFILE); //贴背景图 SelectObject(g_bufdc, g_hBackGround); BitBlt(g_mdc, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, g_bufdc, 0, 0, SRCCOPY); //把图片复制到HDC BitBlt(g_hdc, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, g_mdc, 0, 0, SRCCOPY);
2.人物图像贴图方式：
//1.获取DC g_hdc = GetDC(hwnd); //2.创建兼容DC g_mdc = CreateCompatibleDC(g_hdc); g_bufdc = CreateCompatibleDC(g_hdc); //创建一个和窗口兼容的位图对象 HBITMAP hBitMap = CreateCompatibleBitmap(g_hdc, WINDOW_WIDTH, WINDOW_HEIGHT); SelectObject(g_mdc, hBitMap); //3.加载位图 g_hSprite = (HBITMAP)LoadImage(NULL, _T("goright.bmp"), IMAGE_BITMAP, 480, 108, LR_LOADFROMFILE); g_hBackGround = (HBITMAP)LoadImage(NULL, _T("bg.bmp"), IMAGE_BITMAP, WINDOW_WIDTH, WINDOW_HEIGHT, LR_LOADFROMFILE); //贴人物 SelectObject(g_bufdc, g_hSprite); TransparentBlt(g_mdc, g_iX, g_iY, 60, 108, g_bufdc, g_iNum * 60, 0, 60, 108, RGB(255, 0, 0)); //把图片复制到HDC BitBlt(g_hdc, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, g_mdc, 0, 0, SRCCOPY);
3.语法：
//1.背景wnd.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);//2.EX版本的使用，// 1 size sizeof(WNDCLASSEX) 2 RegisterClassEx(&wnd)if (!RegisterClassEx(&wnd)) { return -1; }//3.消息循环while (msg.message != WM_QUIT) { if (PeekMessage(&msg, 0, 0, 0, PM_REMOVE)) //REMOVE { TranslateMessage(&msg); DispatchMessage(&msg); } else { } } //4.注销窗口 Game_CleanUp(hwnd); UnregisterClass(wnd.lpszClassName, hInstance); //5.获取系统时间 g_tNow = GetTickCount(); if (g_tNow - g_tPre > 50) Game_Paint(hwnd);//6.没有{}case WM_CREATE: PlaySound(_T("仙剑三·原版景天.wav"), NULL, SND_ASYNC | SND_LOOP | SND_FILENAME); Game_Init(hwnd); break;//7. DeleteObject(g_hBackGround); DeleteObject(g_hSprite); DeleteObject(g_mdc); DeleteObject(g_bufdc); ReleaseDC(hwnd, g_hdc); //GetDC()只能被释放 如果删除不释放 就会一直占用着
4.出现bug:：
原因及解决办法： 函数未被调用，函数名错误。
二、完整源代码
1 #include2 #include 3 4 #pragma comment(lib,"Msimg32.lib") //加载静态库 5 #pragma comment(lib,"winmm.lib") 6 7 #define WINDOW_TITLE _T("透明动画") 8 #define WINDOW_WIDTH 800 9 #define WINDOW_HEIGHT 600 10 11 //======================全局函数================================ 12 LRESULT CALLBACK WinProc(HWND, UINT, WPARAM, LPARAM); 13 void Game_Init(HWND hwnd); //初始化函数 14 void Game_Paint(HWND hwnd); 15 void Game_CleanUp(HWND hwnd);//释放资源 16 //============================================================== 17 18 //==========================全局变量============================ 19 DWORD g_tPre, g_tNow; //用来保存上一次贴图的时间，还有本次贴图的时间 20 HDC g_hdc, g_mdc, g_bufdc; //实现三缓冲位图 21 HBITMAP g_hSprite, g_hBackGround; //用来加载人物和背景图片 22 int g_iNum; //记录图片 23 int g_iX, g_iY; //坐标 24 //============================================================== 25 26 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) 27 { 28 //1.设计窗口 29 WNDCLASSEX wnd = { 0 }; 30 31 wnd.cbClsExtra = 0; 32 wnd.cbSize = sizeof(WNDCLASSEX); //结构体大小 33 wnd.cbWndExtra = 0; 34 wnd.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); 35 wnd.hCursor = NULL; 36 wnd.hIcon = NULL; 37 wnd.hInstance = hInstance; 38 wnd.lpfnWndProc = WinProc; 39 wnd.lpszClassName = _T("逐梦之旅"); 40 wnd.lpszMenuName = NULL; 41 wnd.style = CS_HREDRAW | CS_VREDRAW; 42 43 //2.注册窗口 44 if (!RegisterClassEx(&wnd)) 45 { 46 return -1; 47 } 48 49 //3.创建窗口 50 HWND hwnd = CreateWindow(wnd.lpszClassName, WINDOW_TITLE, WS_OVERLAPPEDWINDOW, 100, 100, WINDOW_WIDTH, WINDOW_HEIGHT, NULL, NULL, hInstance, NULL); 51 52 //4.显示和更新 53 ShowWindow(hwnd, SW_SHOW); 54 UpdateWindow(hwnd); 55 56 //5.消息循环 57 MSG msg = { 0 }; 58 while (msg.message != WM_QUIT) 59 { 60 if (PeekMessage(&msg, 0, 0, 0, PM_REMOVE)) 61 { 62 TranslateMessage(&msg); 63 DispatchMessage(&msg); 64 } 65 else 66 { 67 //获取系统时间 68 g_tNow = GetTickCount(); 69 70 if (g_tNow - g_tPre > 50) 71 Game_Paint(hwnd); 72 } 73 } 74 75 //注销窗口 76 Game_CleanUp(hwnd); 77 UnregisterClass(wnd.lpszClassName, hInstance); 78 return 0; 79 } 80 81 LRESULT CALLBACK WinProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) 82 { 83 switch (message) 84 { 85 case WM_CREATE: 86 PlaySound(_T("仙剑三·原版景天.wav"), NULL, SND_ASYNC | SND_LOOP | SND_FILENAME); 87 Game_Init(hwnd); 88 break; 89 90 case WM_DESTROY: 91 PostQuitMessage(0); 92 break; 93 94 case WM_KEYDOWN: 95 if (wParam == VK_ESCAPE) 96 PostQuitMessage(0); 97 break; 98 } 99 return DefWindowProc(hwnd, message, wParam, lParam);100 }101 102 //初始化103 void Game_Init(HWND hwnd)104 {105 //1.获取DC106 g_hdc = GetDC(hwnd);107 108 //2.创建兼容DC109 g_mdc = CreateCompatibleDC(g_hdc);110 g_bufdc = CreateCompatibleDC(g_hdc);111 112 //创建一个和窗口兼容的位图对象113 HBITMAP hBitMap = CreateCompatibleBitmap(g_hdc, WINDOW_WIDTH, WINDOW_HEIGHT);114 SelectObject(g_mdc, hBitMap);115 116 //3.加载位图117 g_hSprite = (HBITMAP)LoadImage(NULL, _T("goright.bmp"), IMAGE_BITMAP, 480, 108, LR_LOADFROMFILE);118 g_hBackGround = (HBITMAP)LoadImage(NULL, _T("bg.bmp"), IMAGE_BITMAP, WINDOW_WIDTH, WINDOW_HEIGHT, LR_LOADFROMFILE);119 120 //初始化人的坐标121 g_iNum = 0; //编号122 g_iX = 0;123 g_iY = 350;124 Game_Paint(hwnd);125 }126 127 void Game_Paint(HWND hwnd)128 {129 //判断图片的编号130 if (g_iNum == 8)131 g_iNum = 0;132 133 //贴背景图134 SelectObject(g_bufdc, g_hBackGround);135 BitBlt(g_mdc, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, g_bufdc, 0, 0, SRCCOPY);136 137 //贴人物138 SelectObject(g_bufdc, g_hSprite);139 TransparentBlt(g_mdc, g_iX, g_iY, 60, 108, g_bufdc, g_iNum * 60, 0, 60, 108, RGB(255, 0, 0));140 141 //把图片复制到HDC142 BitBlt(g_hdc, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, g_mdc, 0, 0, SRCCOPY);143 144 //获取本次贴图时间145 g_tPre = GetTickCount();146 147 g_iNum++;148 g_iX += 10;149 if (g_iX >= WINDOW_WIDTH)150 {151 g_iX = -60;152 }153 }154 155 void Game_CleanUp(HWND hwnd)156 {157 DeleteObject(g_hBackGround);158 DeleteObject(g_hSprite);159 DeleteObject(g_mdc);160 DeleteObject(g_bufdc);161 162 ReleaseDC(hwnd, g_hdc); //GetDC()只能被释放 如果删除不释放 就会一直占用着163 }