Disable CUDA when memory allocations fail.

src/nvtt/Compressor.cpp

@@ -215,6 +215,12 @@ Compressor::Compressor() : m(*new Compressor::Private())
 	if (m.cudaEnabled)
 	{
 		m.cuda = new CudaCompressor();
+
+		if (!m.cuda->isValid())
+		{
+			m.cudaEnabled = false;
+			m.cuda = NULL;
+		}
 	}
 }
 
@@ -235,6 +241,12 @@ void Compressor::enableCudaAcceleration(bool enable)
 	if (m.cudaEnabled && m.cuda == NULL)
 	{
 		m.cuda = new CudaCompressor();
+		
+		if (!m.cuda->isValid())
+		{
+			m.cudaEnabled = false;
+			m.cuda = NULL;
+		}
 	}
 }
 

src/nvtt/cuda/CudaCompressDXT.cpp

@@ -107,7 +107,10 @@ CudaCompressor::~CudaCompressor()
 #endif
 }
 
-
+bool CudaCompressor::isValid() const
+{
+	return m_data != NULL && m_result != NULL && m_bitmapTable != NULL;
+}
 
 // @@ This code is very repetitive and needs to be cleaned up.
 

src/nvtt/cuda/CudaCompressDXT.h

@@ -37,6 +37,8 @@ namespace nv
 		CudaCompressor();
 		~CudaCompressor();
 
+		bool isValid() const;
+
 		void compressDXT1(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
 		void compressDXT3(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
 		void compressDXT5(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);