使用VC播放GIF图片示例
在VC中播放GIF图片需要使用特定的控件和库函数。以下是一个简单的例子，展示了如何加载并显示GIF图像：
```cpp
#include
#include
using namespace std;
HWND hwnd; // 窗口句柄
HINSTANCE hInstance = NULL; // 应用程序实例句柄
LPCSTR lpClassName = TEXT("GifPlayerClass"); // 控件类名
LPCTSTR lpWindowName = TEXT("GifPlayerWindow"); // 窗口标题
// 创建窗口的函数
HWND CreateWindowEx(DWORD dwExStyle, LPCWSTR lpClassName, LPCTSTR lpWindowName, DWORD dwStyle, int cxWidth, int cyHeight, int xPos, int yPos, HWND hWndParent, HMENU hMenu, HINSTANCE hInstance, LPVOID lpParam) {
// 创建窗口的代码
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
// 初始化窗口类和窗口
WNDCLASS wc = {};
wc.lpfnWndProc = DefWindowProcW; // 设置默认消息处理函数
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); // 背景颜色
wc.lpszClassName = lpClassName; // 控件类名
RegisterClass(&wc); // 注册窗口类
hwnd = CreateWindowEx(0, lpClassName, lpWindowName, WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL); // 创建窗口
// 加载GIF图片到控件中
HANDLE hFile = CreateFileA("example.gif", GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE) {
cerr << "Failed to open file." << endl> return 1;
}
HANDLE hPalette = SelectPalette(hFile, PaletteEntry(0), FALSE); // 加载调色板到控件中
SetPalette(hFile, PaletteEntry(0)); // 设置调色板
// 获取GIF图片的宽度和高度
DWORD dwWidth, dwHeight;
GetObject(hFile, sizeof(GIFFileHeaderBlock) + sizeof(GIFFileDataBlock), &dwWidth, &dwHeight);
// 创建位图对象，并设置其大小和颜色深度为1
HBITMAP hBitmap = CreateDIBSection(hFile, NULL, DIB_RGB_COLORS, (LPVOID*)&hBitmap, &dwWidth, &dwHeight);
// 将GIF图片数据填充到位图中
DWORD dwBytesPerLine = sizeof(RGBQUAD) * dwWidth; // 每行字节数
DWORD dwSize = dwBytesPerLine * dwHeight; // 图像总大小
LPVOID lpBits = (LPVOID)MapViewOfFile(hBitmap, FILE_MAP_WRITE, 0, 0, dwSize); // 映射位图到内存中
LPBITMAPINFO lpBI = (LPBITMAPINFO)lpBits - sizeof(BITMAPINFOHEADER); // 获取位图信息头
// 将GIF图片数据填充到位图中
DWORD dwReadBytes;
ReadFile(hFile, lpBI->bmiColors, sizeof(RGBQUAD) * lpBI->bmiHeader.biColorCount, &dwReadBytes, NULL); // 读取调色板
ReadFile(hFile, (LPVOID)&lpBI->bmiHeader, sizeof(BITMAPINFOHEADER), &dwReadBytes, NULL); // 读取位图信息头
ReadFile(hFile, lpBI->bmiColors + dwColorCount, sizeof(RGBQUAD) * (lpBI->bmiHeader.biColorCount - dwColorCount), &dwReadBytes, NULL); // 读取调色板
ReadFile(hFile, (LPVOID)&lpBI->bmiHeader, sizeof(BITMAPINFOHEADER), &dwReadBytes, NULL); // 读取位图信息头
ReadFile(hFile, lpBits + dwColorCount * dwWidth, dwSize - dwColorCount * dwWidth, &dwReadBytes, NULL); // 读取图像数据
// 将位图设置为控件的背景
SetWindowLong(hwnd, GWL_WNDCLASS, (LONG)hInstance);
SendMessage(hwnd, WM_SETPALETTE, (WPARAM)hPalette, LPARAM(hPalette));
SendMessage(hwnd, WM_SETPAINTSTRUCT, 0, (LPARAM)&psPaint); // 设置控件的paint结构体
SetWindowLong(hwnd, GWL_EXSTYLE, WS_EX_CLIENTEDGE | WS_EX_DOUBLEBUFFER); // 设置控件样式为有边框和双缓冲区
SendMessage(hwnd, WM_PAINT, 0, LPARAM(hBitmap)); // 发送WM_PAINT消息，将位图设置为控件的背景
// 循环消息队列
MSG msg = {};
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0; }
```
```cpp
#include
#include
using namespace std;
HWND hwnd; // 窗口句柄
HINSTANCE hInstance = NULL; // 应用程序实例句柄
LPCSTR lpClassName = TEXT("GifPlayerClass"); // 控件类名
LPCTSTR lpWindowName = TEXT("GifPlayerWindow"); // 窗口标题
// 创建窗口的函数
HWND CreateWindowEx(DWORD dwExStyle, LPCWSTR lpClassName, LPCTSTR lpWindowName, DWORD dwStyle, int cxWidth, int cyHeight, int xPos, int yPos, HWND hWndParent, HMENU hMenu, HINSTANCE hInstance, LPVOID lpParam) {
// 创建窗口的代码
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
// 初始化窗口类和窗口
WNDCLASS wc = {};
wc.lpfnWndProc = DefWindowProcW; // 设置默认消息处理函数
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); // 背景颜色
wc.lpszClassName = lpClassName; // 控件类名
RegisterClass(&wc); // 注册窗口类
hwnd = CreateWindowEx(0, lpClassName, lpWindowName, WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL); // 创建窗口
// 加载GIF图片到控件中
HANDLE hFile = CreateFileA("example.gif", GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE) {
cerr << "Failed to open file." << endl> return 1;
}
HANDLE hPalette = SelectPalette(hFile, PaletteEntry(0), FALSE); // 加载调色板到控件中
SetPalette(hFile, PaletteEntry(0)); // 设置调色板
// 获取GIF图片的宽度和高度
DWORD dwWidth, dwHeight;
GetObject(hFile, sizeof(GIFFileHeaderBlock) + sizeof(GIFFileDataBlock), &dwWidth, &dwHeight);
// 创建位图对象，并设置其大小和颜色深度为1
HBITMAP hBitmap = CreateDIBSection(hFile, NULL, DIB_RGB_COLORS, (LPVOID*)&hBitmap, &dwWidth, &dwHeight);
// 将GIF图片数据填充到位图中
DWORD dwBytesPerLine = sizeof(RGBQUAD) * dwWidth; // 每行字节数
DWORD dwSize = dwBytesPerLine * dwHeight; // 图像总大小
LPVOID lpBits = (LPVOID)MapViewOfFile(hBitmap, FILE_MAP_WRITE, 0, 0, dwSize); // 映射位图到内存中
LPBITMAPINFO lpBI = (LPBITMAPINFO)lpBits - sizeof(BITMAPINFOHEADER); // 获取位图信息头
// 将GIF图片数据填充到位图中
DWORD dwReadBytes;
ReadFile(hFile, lpBI->bmiColors, sizeof(RGBQUAD) * lpBI->bmiHeader.biColorCount, &dwReadBytes, NULL); // 读取调色板
ReadFile(hFile, (LPVOID)&lpBI->bmiHeader, sizeof(BITMAPINFOHEADER), &dwReadBytes, NULL); // 读取位图信息头
ReadFile(hFile, lpBI->bmiColors + dwColorCount, sizeof(RGBQUAD) * (lpBI->bmiHeader.biColorCount - dwColorCount), &dwReadBytes, NULL); // 读取调色板
ReadFile(hFile, (LPVOID)&lpBI->bmiHeader, sizeof(BITMAPINFOHEADER), &dwReadBytes, NULL); // 读取位图信息头
ReadFile(hFile, lpBits + dwColorCount * dwWidth, dwSize - dwColorCount * dwWidth, &dwReadBytes, NULL); // 读取图像数据
// 将位图设置为控件的背景
SetWindowLong(hwnd, GWL_WNDCLASS, (LONG)hInstance);
SendMessage(hwnd, WM_SETPALETTE, (WPARAM)hPalette, LPARAM(hPalette));
SendMessage(hwnd, WM_SETPAINTSTRUCT, 0, (LPARAM)&psPaint); // 设置控件的paint结构体
SetWindowLong(hwnd, GWL_EXSTYLE, WS_EX_CLIENTEDGE | WS_EX_DOUBLEBUFFER); // 设置控件样式为有边框和双缓冲区
SendMessage(hwnd, WM_PAINT, 0, LPARAM(hBitmap)); // 发送WM_PAINT消息，将位图设置为控件的背景
// 循环消息队列
MSG msg = {};
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0; }
```
文件大小：64.54KB
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