include <directxsdk/d3d9.h>

include <directxsdk/d3dx9.h>

include <directxsdk/d3dx9tex.h>

include <windows.h>

include

int width = 1084;
int height = 628;

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
switch (uMsg) {
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
// 注册窗口类
WNDCLASS wc = {};
wc.lpfnWndProc = WindowProc;
wc.hInstance = hInstance;
wc.lpszClassName = "D3DWindowClass";
RegisterClass(&wc);

// 创建窗口
HWND hwnd = CreateWindowEx(
	0,
	"D3DWindowClass",
	"D3D Window",
	WS_OVERLAPPEDWINDOW,
	CW_USEDEFAULT, CW_USEDEFAULT, width, height,
	NULL, NULL, hInstance, NULL
);

if (!hwnd) {
	std::cerr << "Failed to create window." << std::endl;
	return -1;
}

ShowWindow(hwnd, nCmdShow);

// 初始化Direct3D
IDirect3D9* d3d = Direct3DCreate9(D3D_SDK_VERSION);
if (!d3d) {
	std::cerr << "Failed to create D3D object." << std::endl;
	return -1;
}

D3DPRESENT_PARAMETERS d3dpp = {};
d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.hDeviceWindow = hwnd;

IDirect3DDevice9* device;
if (FAILED(d3d->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &device))) {
	std::cerr << "Failed to create D3D device." << std::endl;
	d3d->Release();
	return -1;
}

// 加载图片
IDirect3DSurface9* surface;
if (FAILED(device->CreateOffscreenPlainSurface(width, height
	, D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &surface, NULL))) {
	std::cerr << "Failed to create surface." << std::endl;
	device->Release();
	d3d->Release();
	return -1;
}

// 从文件加载图像到表面
HRESULT hr = D3DXLoadSurfaceFromFile(
	surface,          // 目标表面
	NULL,             // 目标调色板
	NULL,             // 目标矩形
	"D:\\image.jpg",  // 源文件路径
	NULL,             // 源矩形
	D3DX_FILTER_NONE, // 过滤器
	0xFF000000,       // 颜色键
	NULL              // 图像信息
);

if (FAILED(hr)) {
	std::cerr << "Failed to load image from file." << std::endl;
	surface->Release();
	device->Release();
	d3d->Release();
	return -1;
}


// 渲染循环
MSG msg = {};
while (GetMessage(&msg, NULL, 0, 0)) {
	TranslateMessage(&msg);
	DispatchMessage(&msg);

	// 清除屏幕
	device->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);

	// 开始场景
	device->BeginScene();

	// 将表面绘制到屏幕上
	LPDIRECT3DSURFACE9 backBuffer;
	device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &backBuffer);
	device->StretchRect(surface, NULL, backBuffer, NULL, D3DTEXF_NONE);

	// 结束场景
	device->EndScene();

	// 交换缓冲区
	device->Present(NULL, NULL, NULL, NULL);
}

// 释放资源
surface->Release();
device->Release();
d3d->Release();

return 0;

}