Exemplo n.º 1
0
// Save a raw image instance into a file
bool save_image(const std::string &dest_filename, LLPointer<LLImageRaw> raw_image, int blocks_size, int precincts_size, int levels, bool reversible, bool output_stats)
{
	LLPointer<LLImageFormatted> image = create_image(dest_filename);
	
	// Set the image codestream parameters on output in the case of a j2c image
	if (image->getCodec() == IMG_CODEC_J2C)
	{
		// That method doesn't exist (and likely, doesn't make sense) for any other image file format
		// hence the required cryptic cast.
		if ((blocks_size != -1) || (precincts_size != -1) || (levels != 0))
		{
			((LLImageJ2C*)(image.get()))->initEncode(*raw_image, blocks_size, precincts_size, levels);
		}
		((LLImageJ2C*)(image.get()))->setReversible(reversible);
	}
	
	if (!image->encode(raw_image, 0.0f))
	{
		return false;
	}
	
	if (output_stats)
	{
		output_image_stats(image, dest_filename);
	}

	return image->save(dest_filename);
}
Exemplo n.º 2
0
// Load an image from file and return a raw (decompressed) instance of its data
LLPointer<LLImageRaw> load_image(const std::string &src_filename, int discard_level, int* region, bool output_stats)
{
	LLPointer<LLImageFormatted> image = create_image(src_filename);
	
	// This just loads the image file stream into a buffer. No decoding done.
	if (!image->load(src_filename))
	{
		return NULL;
	}
	
	if(	(image->getComponents() != 3) && (image->getComponents() != 4) )
	{
		std::cout << "Image files with less than 3 or more than 4 components are not supported\n";
		return NULL;
	}
	
	if (output_stats)
	{
		output_image_stats(image, src_filename);
	}
	
	LLPointer<LLImageRaw> raw_image = new LLImageRaw;
	
	// Set the image restriction on load in the case of a j2c image
	if ((image->getCodec() == IMG_CODEC_J2C) && ((discard_level != -1) || (region != NULL)))
	{
		// That method doesn't exist (and likely, doesn't make sense) for any other image file format
		// hence the required cryptic cast.
		((LLImageJ2C*)(image.get()))->initDecode(*raw_image, discard_level, region);
	}
	
	if (!image->decode(raw_image, 0.0f))
	{
		return NULL;
	}
	
	return raw_image;
}
Exemplo n.º 3
0
// Load an image from file and return a raw (decompressed) instance of its data
LLPointer<LLImageRaw> load_image(const std::string &src_filename, int discard_level, int* region, int load_size, bool output_stats)
{
	LLPointer<LLImageFormatted> image = create_image(src_filename);
	
	// We support partial loading only for j2c images
	if (image->getCodec() == IMG_CODEC_J2C)
	{
		// Load the header
		if (!image->load(src_filename, 600))
		{
			return NULL;
		}
		S32 h = ((LLImageJ2C*)(image.get()))->calcHeaderSize();
		S32 d = (load_size > 0 ? ((LLImageJ2C*)(image.get()))->calcDiscardLevelBytes(load_size) : 0);
		S8  r = ((LLImageJ2C*)(image.get()))->getRawDiscardLevel();
		std::cout << "Merov debug : header = " << h << ", load_size = " << load_size << ", discard level = " << d << ", raw discard level = " << r << std::endl;
		for (d = 0; d < MAX_DISCARD_LEVEL; d++)
		{
			S32 data_size = ((LLImageJ2C*)(image.get()))->calcDataSize(d);
			std::cout << "Merov debug : discard_level = " << d << ", data_size = " << data_size << std::endl;
		}
		if (load_size < 0)
		{
			load_size = (discard_level != -1 ? ((LLImageJ2C*)(image.get()))->calcDataSize(discard_level) : 0);
		}
		// Load the requested byte range
		if (!image->load(src_filename, load_size))
		{
			return NULL;
		}
	}
	else 
	{
		// This just loads the image file stream into a buffer. No decoding done.
		if (!image->load(src_filename))
		{
			return NULL;
		}
	}
	
	if(	(image->getComponents() != 3) && (image->getComponents() != 4) )
	{
		std::cout << "Image files with less than 3 or more than 4 components are not supported\n";
		return NULL;
	}
	
	if (output_stats)
	{
		output_image_stats(image, src_filename);
	}
	
	LLPointer<LLImageRaw> raw_image = new LLImageRaw;
	
	// Set the image restriction on load in the case of a j2c image
	if ((image->getCodec() == IMG_CODEC_J2C) && ((discard_level != -1) || (region != NULL)))
	{
		// That method doesn't exist (and likely, doesn't make sense) for any other image file format
		// hence the required cryptic cast.
		((LLImageJ2C*)(image.get()))->initDecode(*raw_image, discard_level, region);
	}
	
	if (!image->decode(raw_image, 0.0f))
	{
		return NULL;
	}
	
	return raw_image;
}