请问一下DX9关于surface的问题

[yjsj1037]

1.如何显示一块surface
2.如何对surface像素进行操作

[ryfdizuo]

dx9sampler中找找相关例子。

[xychzh]

我给你一个完整的例子（除了加载和渲染IDirect3DSurface9外，没有其他多余代码），另外有一个读取tga问的函数，这函数是为了演示如何手动加载像素到IDirect3DSurface9的，另外D3D的相关定义未给出，这个也就没必要写了：

// 保存对齐状态
#pragma pack(push)
#pragma pack(1)

// TGA 文件头
struct TGA_FILE_HEADER 
{
	// TGA像素数据的排列顺序：B G R A

	BYTE	IdLength;				// 图像信息字段(默认:0)
	BYTE	ColorMapType;			// 颜色标的类型(默认0)
	BYTE	ImageType;				// 图像类型码(支持2或10)
	WORD	ColorMapFirstIndex;		// 颜色表的索引(默认:0)
	WORD	ColorMapLength;			// 颜色表的长度(默认:0)
	BYTE	ColorMapEntrySize;		// 颜色表表项的为数(默认:0，支持16/24/32)
	WORD	XOrigin;				// 图像X坐标的起始位置(默认:0)
	WORD	YOrigin;				// 图像Y坐标的起始位置(默认:0)
	WORD	ImageWidth;				// 图像的宽度
	WORD	ImageHeight;			// 图像的高度
	BYTE	PixelDepth;				// 图像每像素存储占用位数
	BYTE	ImageDescruptor;		// 图像描述字符字节(默认:0，不支持16bit 565格式)
};

// 像素
struct PIXEL32
{
	BYTE B;	// 蓝色
	BYTE G;	// 绿色
	BYTE R;	// 红色
	BYTE A;	// 通道
};

#pragma pack(pop)//恢复对齐状态

// 获取tga文件的bmp数据（无压缩的tga文件）
void GetBmpFromTga(const char* srcFile, UINT** ppDstBmpBuffer, int* pOutWidth, int* pOutHeight, int* pOutSize)
{
	TGA_FILE_HEADER TgaHeader;
	memset(&TgaHeader, 0, sizeof(TGA_FILE_HEADER));

	FILE* pFile = fopen(srcFile, "rb");
	if (pFile == NULL)
	{
		char strErrorInfo[256];
		sprintf(strErrorInfo, "%s打开失败!", srcFile);
		MessageBox(0, strErrorInfo, 0, MB_OK);
		return;
	}

	UINT* pBmpData = NULL;
	int pixelCount = 0;

	// 读TGA图像文件头
	fread((char*)(&TgaHeader), sizeof(TGA_FILE_HEADER), 1, pFile);

	pixelCount = TgaHeader.ImageWidth * TgaHeader.ImageHeight;
	pBmpData = new UINT[pixelCount];

	// 读图像数据
	fread(pBmpData, sizeof(PIXEL32)*pixelCount, 1, pFile);

	fclose(pFile);

	if (ppDstBmpBuffer != NULL)	*ppDstBmpBuffer = pBmpData;
	if (pOutWidth != NULL)		*pOutWidth = TgaHeader.ImageWidth;
	if (pOutHeight != NULL)		*pOutHeight = TgaHeader.ImageHeight;
	if (pOutSize != NULL)		*pOutSize = sizeof(PIXEL32) * pixelCount;
}

// 初始化
void CRender::InitData()
{
	m_pSurface = NULL;

	D3DXIMAGE_INFO imageInfo;
	D3DXGetImageInfoFromFile("test.tga", &imageInfo);

	HRESULT hr;
	hr = m_pD3DDevice->CreateOffscreenPlainSurface(imageInfo.Width, imageInfo.Height, imageInfo.Format, D3DPOOL_DEFAULT, &m_pSurface, NULL);

	if (FAILED(hr))
	{
		MessageBox(0, "CreateOffscreenPlainSurface()创建失败！", 0, MB_OK);
	}

	m_Width = imageInfo.Width;
	m_Height = imageInfo.Height;

	// 用D3DXLoadSurfaceFromFile()加载像素
	if (true)
	{
		D3DXLoadSurfaceFromFile(m_pSurface, NULL, NULL, "test.tga", NULL, D3DX_FILTER_NONE, 0, &imageInfo);
	}

	// 手动加载像素
	if (false)
	{
		UINT* pBmp32 = NULL;

		// 加载tga文件
		{
			GetBmpFromTga("test.tga", &pBmp32, &m_Width, &m_Height, NULL);
		}

		D3DLOCKED_RECT lrect;
		hr = m_pSurface->LockRect(&lrect, NULL, 0);
		if (FAILED(hr))
		{
			delete pBmp32;
			pBmp32 = NULL;
			m_pSurface->UnlockRect();
			return;
		}

		UINT* pSrc = (UINT*)pBmp32;
		UINT* pDst = static_cast<UINT*>(lrect.pBits);
		int pitch = lrect.Pitch/sizeof(UINT);

		pSrc += (m_Height-1)*m_Width;
		for (int h=0, w=0, index=0; h<m_Height; h++)
		{
			memcpy(pDst, pSrc, sizeof(UINT)*m_Width);
			pSrc-=m_Width, pDst+=pitch;
		}

		m_pSurface->UnlockRect();

		delete pBmp32;
		pBmp32 = NULL;
	}
}

// 加载表面数据
void CRender::InitData()
{
	m_pSurface = NULL;

	D3DXIMAGE_INFO imageInfo;
	D3DXGetImageInfoFromFile("test.tga", &imageInfo);

	HRESULT hr;
	hr = m_pD3DDevice->CreateOffscreenPlainSurface(imageInfo.Width, imageInfo.Height, imageInfo.Format, D3DPOOL_DEFAULT, &m_pSurface, NULL);

	if (FAILED(hr))
	{
		MessageBox(0, "CreateOffscreenPlainSurface()创建失败！", 0, MB_OK);
	}

	m_Width = imageInfo.Width;
	m_Height = imageInfo.Height;

	// 用D3DXLoadSurfaceFromFile()加载像素
	if (true)
	{
		D3DXLoadSurfaceFromFile(m_pSurface, NULL, NULL, "test.tga", NULL, D3DX_FILTER_NONE, 0, &imageInfo);
	}

	// 手动加载像素
	if (false)
	{
		UINT* pBmp32 = NULL;

		// 加载tga文件
		{
			GetBmpFromTga("test.tga", &pBmp32, &m_Width, &m_Height, NULL);
		}

		D3DLOCKED_RECT lrect;
		hr = m_pSurface->LockRect(&lrect, NULL, 0);
		if (FAILED(hr))
		{
			delete pBmp32;
			pBmp32 = NULL;
			m_pSurface->UnlockRect();
			return;
		}

		UINT* pSrc = (UINT*)pBmp32;
		UINT* pDst = static_cast<UINT*>(lrect.pBits);
		int pitch = lrect.Pitch/sizeof(UINT);

		pSrc += (m_Height-1)*m_Width;
		for (int h=0, w=0, index=0; h<m_Height; h++)
		{
			memcpy(pDst, pSrc, sizeof(UINT)*m_Width);
			pSrc-=m_Width, pDst+=pitch;
		}

		m_pSurface->UnlockRect();

		delete pBmp32;
		pBmp32 = NULL;
	}
}

// 渲染表面数据
void CRender::RenderExample()
{
// ...
	IDirect3DSurface9* backbuffer = NULL; 

	RECT rcSrc = { 0, 0, m_Width, m_Height };		// 纹理坐标
	RECT rcDst = { 200, 200, 0, 0 };				// 目标矩形区域
	rcDst.right = rcDst.left + (rcSrc.right-rcSrc.left);
	rcDst.bottom = rcDst.top + (rcSrc.bottom-rcSrc.top);

	m_pD3DDevice->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &backbuffer);
	m_pD3DDevice->StretchRect(m_pSurface, &rcSrc, backbuffer, &rcDst, D3DTEXF_NONE); 
	m_pD3DDevice->UpdateSurface(m_pSurface, NULL, backbuffer, NULL);

//...
}

另外，本代码已经经过编译，运行无误。

[xychzh]

补：
不好意思，InitData()不小心复制了两遍，随便删掉一个就行了。

[yjsj1037]

楼上回的不错，速度也快。。分给你了，虽然不多。。。总之万分感激

[wangwizard]

找的就是这东西