Method CopyFromTextureRes

trinity/Tr2HostBitmap.cpp:268–370

}

bool Tr2HostBitmap::CopyFromTextureRes( TriTextureRes& res, Tr2RenderContext& renderContext )
{
	if( !res.GetTexture() )
	{
		return false;
	}

	if( res.GetType() != TEX_TYPE_2D && res.GetType() != TEX_TYPE_CUBE )
	{
		CCP_LOGERR( "Tr2HostBitmap::CopyFromTextureRes, only 2D and CUBE textures supported" );
		return false;
	}

	if( !res.GetTexture() && res.GetType() == TEX_TYPE_CUBE )
	{
		CCP_LOGERR( "Tr2HostBitmap::CopyFromTextureRes, legacy CUBE textures are not supported" );
		return false;
	}

	bool alphaConvert = false;

	if( res.GetTexture() )
	{
		if( !res.GetTexture()->IsValid() || GetType() != res.GetTexture()->GetType() || !CheckForMatch( res.GetTexture()->GetDesc(), true, alphaConvert, "CopyFromTextureRes" ) )
		{
			return false;
		}
	}

	const uint32_t mipCount = std::min( GetTrueMipCount(), res.GetTrueMipCount() );
	const uint32_t faceCount = GetArraySize();


	for( uint32_t face = 0; face != faceCount; ++face )
	{
		for( uint32_t mipLevel = 0; mipLevel != mipCount; ++mipLevel )
		{
			const void* srcData = nullptr;
			uint32_t srcPitch = 0;

			HRESULT hr = E_FAIL;

			if( res.m_wrappedRenderTarget )
			{
				hr = res.m_wrappedRenderTarget->GetRenderTarget().MapForReading( Tr2TextureSubresource( face, mipLevel ), srcData, srcPitch, renderContext );
			}
			else if( res.GetTexture() )
			{
				hr = res.GetTexture()->MapForReading( Tr2TextureSubresource( face, mipLevel ), srcData, srcPitch, renderContext );
			}
			if( FAILED( hr ) || srcData == nullptr )
			{
				CCP_LOGERR( "Tr2HostBitmap::CopyFromTextureRes, error locking surface" );
				return false;
			}


			uint8_t* dst = (uint8_t*)GetMipRawData( mipLevel, face );