c++ 根据图片生成异形窗口并在生成的窗口上画图

要生成异形窗口并在窗口上绘制图片，可以使用以下步骤： 1. 加载图片，可以使用GDI+库或其他图片处理库。 2. 创建一个透明的窗口，可以使用Windows API的CreateWindowEx函数，并设置窗口的样式为WS_EX_LAYERED。 3. 使用Windows API的UpdateLayeredWindow函数将图片绘制到窗口上。 下面是一个简单的示例代码，可以根据名为"image.bmp"的图片生成异形窗口并在窗口上绘制图片： ``` #include <Windows.h> #include <gdiplus.h> #pragma comment(lib, "gdiplus.lib") LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { switch (message) { case WM_PAINT: { PAINTSTRUCT ps; HDC hdc = BeginPaint(hWnd, &ps); // 加载图片 Gdiplus::Bitmap* bmp = Gdiplus::Bitmap::FromFile(L"image.bmp"); if (bmp != NULL) { // 绘制图片 Gdiplus::Graphics graphics(hdc); graphics.DrawImage(bmp, 0, 0); delete bmp; } EndPaint(hWnd, &ps); } break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hWnd, message, wParam, lParam); } return 0; } int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { // 加载图片 Gdiplus::Bitmap* bmp = Gdiplus::Bitmap::FromFile(L"image.bmp"); if (bmp == NULL) return 0; // 获取图片的大小 int width = bmp->GetWidth(); int height = bmp->GetHeight(); // 创建透明窗口 HWND hWnd = CreateWindowEx(WS_EX_LAYERED | WS_EX_TRANSPARENT | WS_EX_TOOLWINDOW, L"MyWindowClass", L"Window Title", WS_POPUP, 0, 0, width, height, NULL, NULL, hInstance, NULL); if (hWnd == NULL) return 0; // 设置窗口的透明度 SetLayeredWindowAttributes(hWnd, RGB(0, 0, 0), 0, LWA_COLORKEY); // 使用UpdateLayeredWindow函数将图片绘制到窗口上 HDC hdcScreen = GetDC(NULL); HDC hdcMem = CreateCompatibleDC(hdcScreen); HBITMAP hBitmap = CreateBitmap(width, height, 1, 32, bmp->GetBits()); HBITMAP hOldBitmap = (HBITMAP)SelectObject(hdcMem, hBitmap); POINT ptDst = { 0, 0 }; SIZE sz = { width, height }; POINT ptSrc = { 0, 0 }; BLENDFUNCTION blend = { AC_SRC_OVER, 0, 255, AC_SRC_ALPHA }; UpdateLayeredWindow(hWnd, hdcScreen, &ptDst, &sz, hdcMem, &ptSrc, 0, &blend, ULW_ALPHA); SelectObject(hdcMem, hOldBitmap); DeleteObject(hBitmap); DeleteDC(hdcMem); ReleaseDC(NULL, hdcScreen); // 注册窗口类 WNDCLASS wc = { 0 }; wc.lpfnWndProc = WndProc; wc.hInstance = hInstance; wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); wc.lpszClassName = L"MyWindowClass"; RegisterClass(&wc); // 显示窗口 ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); // 消息循环 MSG msg = { 0 }; while (GetMessage(&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return (int)msg.wParam; } ```