C++ IWICImagingFactory::CreateFormatConverter方法代码示例

本文整理汇总了C++中IWICImagingFactory::CreateFormatConverter方法的典型用法代码示例。如果您正苦于以下问题：C++ IWICImagingFactory::CreateFormatConverter方法的具体用法？C++ IWICImagingFactory::CreateFormatConverter怎么用？C++ IWICImagingFactory::CreateFormatConverter使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类IWICImagingFactory的用法示例。

在下文中一共展示了IWICImagingFactory::CreateFormatConverter方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: LoadResourceImage

/// <summary>
/// Load an image from a resource into a buffer
/// </summary>
/// <param name="resourceName">name of image resource to load</param>
/// <param name="resourceType">type of resource to load</param>
/// <param name="nOutputWidth">width (in pixels) of scaled output bitmap</param>
/// <param name="nOutputHeight">height (in pixels) of scaled output bitmap</param>
/// <param name="pOutputBuffer">buffer that will hold the loaded image</param>
/// <returns>S_OK on success, otherwise failure code</returns>
HRESULT CColorBasics::LoadResourceImage(PCWSTR resourceName, PCWSTR resourceType, UINT nOutputWidth, UINT nOutputHeight, RGBQUAD* pOutputBuffer)
{
	IWICImagingFactory* pIWICFactory = NULL;
	IWICBitmapDecoder* pDecoder = NULL;
	IWICBitmapFrameDecode* pSource = NULL;
	IWICStream* pStream = NULL;
	IWICFormatConverter* pConverter = NULL;
	IWICBitmapScaler* pScaler = NULL;

	HRSRC imageResHandle = NULL;
	HGLOBAL imageResDataHandle = NULL;
	void *pImageFile = NULL;
	DWORD imageFileSize = 0;

	HRESULT hrCoInit = CoInitialize(NULL);
	HRESULT hr = hrCoInit;

	if (SUCCEEDED(hr))
	{
		hr = CoCreateInstance(CLSID_WICImagingFactory, NULL, CLSCTX_INPROC_SERVER, IID_IWICImagingFactory, (LPVOID*)&pIWICFactory);
	}

	if (SUCCEEDED(hr))
	{
		// Locate the resource
		imageResHandle = FindResourceW(HINST_THISCOMPONENT, resourceName, resourceType);
		hr = imageResHandle ? S_OK : E_FAIL;
	}

	if (SUCCEEDED(hr))
	{
		// Load the resource
		imageResDataHandle = LoadResource(HINST_THISCOMPONENT, imageResHandle);
		hr = imageResDataHandle ? S_OK : E_FAIL;
	}

	if (SUCCEEDED(hr))
	{
		// Lock it to get a system memory pointer.
		pImageFile = LockResource(imageResDataHandle);
		hr = pImageFile ? S_OK : E_FAIL;
	}

	if (SUCCEEDED(hr))
	{
		// Calculate the size.
		imageFileSize = SizeofResource(HINST_THISCOMPONENT, imageResHandle);
		hr = imageFileSize ? S_OK : E_FAIL;
	}

	if (SUCCEEDED(hr))
	{
		// Create a WIC stream to map onto the memory.
		hr = pIWICFactory->CreateStream(&pStream);
	}

	if (SUCCEEDED(hr))
	{
		// Initialize the stream with the memory pointer and size.
		hr = pStream->InitializeFromMemory(
			reinterpret_cast<BYTE*>(pImageFile),
			imageFileSize);
	}

	if (SUCCEEDED(hr))
	{
		// Create a decoder for the stream.
		hr = pIWICFactory->CreateDecoderFromStream(
			pStream,
			NULL,
			WICDecodeMetadataCacheOnLoad,
			&pDecoder);
	}

	if (SUCCEEDED(hr))
	{
		// Create the initial frame.
		hr = pDecoder->GetFrame(0, &pSource);
	}

	if (SUCCEEDED(hr))
	{
		// Convert the image format to 32bppPBGRA
		// (DXGI_FORMAT_B8G8R8A8_UNORM + D2D1_ALPHA_MODE_PREMULTIPLIED).
		hr = pIWICFactory->CreateFormatConverter(&pConverter);
	}

	if (SUCCEEDED(hr))
	{
		hr = pIWICFactory->CreateBitmapScaler(&pScaler);
	}
//.........这里部分代码省略.........

开发者ID:starwada，项目名称:K4W_Sample，代码行数:101，代码来源:ColorBasics.cpp

示例2: if


//.........这里部分代码省略.........
	size_t imageSize = rowPitch * theight;

	std::unique_ptr<uint8_t[]> temp(new uint8_t[imageSize]);

	// Load image data
	if (memcmp(&convertGUID, &pixelFormat, sizeof(GUID)) == 0
		&& twidth == width
		&& theight == height)
	{
		// No format conversion or resize needed
		hr = CopyPixelsHelper(frame, 0, static_cast<UINT>(rowPitch), static_cast<UINT>(imageSize), temp.get());
		if (FAILED(hr))
			return hr;
	}
	else if (twidth != width || theight != height)
	{
		// Resize
		IWICImagingFactory* pWIC = _GetWIC();
		if (!pWIC)
			return E_NOINTERFACE;

		ComPtr<IWICBitmapScaler> scaler;
		hr = pWIC->CreateBitmapScaler(&scaler);
		if (FAILED(hr))
			return hr;

		hr = scaler->Initialize(frame, twidth, theight, WICBitmapInterpolationModeFant);
		if (FAILED(hr))
			return hr;

		WICPixelFormatGUID pfScaler;
		hr = scaler->GetPixelFormat(&pfScaler);
		if (FAILED(hr))
			return hr;

		if (memcmp(&convertGUID, &pfScaler, sizeof(GUID)) == 0)
		{
			hr = CopyPixelsHelper(scaler.Get(), 0, static_cast<UINT>(rowPitch), static_cast<UINT>(imageSize), temp.get());
			if (FAILED(hr))
				return hr;
		}
		else
		{
			ComPtr<IWICFormatConverter> FC;
			hr = pWIC->CreateFormatConverter(&FC);
			if (FAILED(hr))
				return hr;

			BOOL canConvert = FALSE;
			hr = FC->CanConvert(pfScaler, convertGUID, &canConvert);
			if (FAILED(hr) || !canConvert)
			{
				return E_UNEXPECTED;
			}

			hr = FC->Initialize(scaler.Get(), convertGUID, WICBitmapDitherTypeErrorDiffusion, 0, 0, WICBitmapPaletteTypeCustom);
			if (FAILED(hr))
				return hr;

			hr = CopyPixelsHelper(FC.Get(), 0, static_cast<UINT>(rowPitch), static_cast<UINT>(imageSize), temp.get());
			if (FAILED(hr))
				return hr;
		}
	}
	else
	{
		// Format conversion but no resize
		IWICImagingFactory* pWIC = _GetWIC();
		if (!pWIC)
			return E_NOINTERFACE;

		ComPtr<IWICFormatConverter> FC;
		hr = pWIC->CreateFormatConverter(&FC);
		if (FAILED(hr))
			return hr;

		BOOL canConvert = FALSE;
		hr = FC->CanConvert(pixelFormat, convertGUID, &canConvert);
		if (FAILED(hr) || !canConvert)
		{
			return E_UNEXPECTED;
		}

		hr = FC->Initialize(frame, convertGUID, WICBitmapDitherTypeErrorDiffusion, 0, 0, WICBitmapPaletteTypeCustom);
		if (FAILED(hr))
			return hr;

		hr = CopyPixelsHelper(FC.Get(), 0, static_cast<UINT>(rowPitch), static_cast<UINT>(imageSize), temp.get());
		if (FAILED(hr))
			return hr;
	}

	glTexImage2D(target, level, formattype.format, twidth, theight, 0, formattype.format, formattype.type, temp.get());
	if (glGetError() != GL_NO_ERROR)
	{
		return E_FAIL;
	}

	return hr;
}

开发者ID:UnigramDev，项目名称:Unigram，代码行数:101，代码来源:WICTextureLoader.cpp

示例3: CreateTextureFromWIC


//.........这里部分代码省略.........
            return hr;
    }
    else if ( twidth != width || theight != height )
    {
        // Resize
        IWICImagingFactory* pWIC = _GetWIC();
        if ( !pWIC )
            return E_NOINTERFACE;

        ComPtr<IWICBitmapScaler> scaler;
        hr = pWIC->CreateBitmapScaler( scaler.GetAddressOf() );
        if ( FAILED(hr) )
            return hr;

        hr = scaler->Initialize( frame, twidth, theight, WICBitmapInterpolationModeFant );
        if ( FAILED(hr) )
            return hr;

        WICPixelFormatGUID pfScaler;
        hr = scaler->GetPixelFormat( &pfScaler );
        if ( FAILED(hr) )
            return hr;

        if ( memcmp( &convertGUID, &pfScaler, sizeof(GUID) ) == 0 )
        {
            // No format conversion needed
            hr = scaler->CopyPixels( 0, static_cast<UINT>( rowPitch ), static_cast<UINT>( imageSize ), temp.get() );  
            if ( FAILED(hr) )
                return hr;
        }
        else
        {
            ComPtr<IWICFormatConverter> FC;
            hr = pWIC->CreateFormatConverter( FC.GetAddressOf() );
            if ( FAILED(hr) )
                return hr;

            hr = FC->Initialize( scaler.Get(), convertGUID, WICBitmapDitherTypeErrorDiffusion, 0, 0, WICBitmapPaletteTypeCustom );
            if ( FAILED(hr) )
                return hr;

            hr = FC->CopyPixels( 0, static_cast<UINT>( rowPitch ), static_cast<UINT>( imageSize ), temp.get() );  
            if ( FAILED(hr) )
                return hr;
        }
    }
    else
    {
        // Format conversion but no resize
        IWICImagingFactory* pWIC = _GetWIC();
        if ( !pWIC )
            return E_NOINTERFACE;

        ComPtr<IWICFormatConverter> FC;
        hr = pWIC->CreateFormatConverter( FC.GetAddressOf() );
        if ( FAILED(hr) )
            return hr;

        hr = FC->Initialize( frame, convertGUID, WICBitmapDitherTypeErrorDiffusion, 0, 0, WICBitmapPaletteTypeCustom );
        if ( FAILED(hr) )
            return hr;

        hr = FC->CopyPixels( 0, static_cast<UINT>( rowPitch ), static_cast<UINT>( imageSize ), temp.get() );  
        if ( FAILED(hr) )
            return hr;
    }

开发者ID:zaclolz，项目名称:Blood-Crystals，代码行数:67，代码来源:WICTextureLoader.cpp

注：本文中的IWICImagingFactory::CreateFormatConverter方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。