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 #include<Windows.h>
2 #include<tchar.h>
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DC
106 g_hdc = GetDC(hwnd);
107
108 //2.创建兼容DC
109 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HDC
142 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 }
时间： 2024-10-25 01:25:23