CxUtils::PNG Namespace Reference

Classes
struct	InputSource
	Input source for PNG decompression manager. More...
struct	OutputSource
	Output source for PNG compression manager. More...
Functions
CX_UTILS_DLL int	DecompressImage (const unsigned char *png, const unsigned int pngSize, unsigned char **image, unsigned short *width, unsigned short *height, unsigned char *channels)
	Takes PNG data inside of a buffer and decompresses it to another buffer which will store the raw image.
CX_UTILS_DLL int	CompressImage (const unsigned short width, const unsigned short height, const unsigned char channels, const unsigned char *image, unsigned char **png, unsigned int *pngBufferSize, unsigned int *pngSize)
	Compresses RAW image data to PNG format.
void	ReadData (png_structp png_ptr, png_bytep data, png_size_t length)
void	WriteData (png_structp png_ptr, png_bytep data, png_size_t length)

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Function Documentation

int CxUtils::PNG::CompressImage	(	const unsigned short	width,
		const unsigned short	height,
		const unsigned char	channels,
		const unsigned char *	image,
		unsigned char **	png,
		unsigned int *	pngBufferSize,
		unsigned int *	pngSize
	)

Compresses RAW image data to PNG format.

Parameters:

[in]	image	Pointer to raw image data that needs to be compressed. Data must be in BGR channel format.
[in]	width	The width of the image.
[in]	height	The height of the image.
[in]	channels	The number of channels in the image.
[out]	png	Pointer to buffer which will store resulting PNG data. If NULL or too small this buffer will grow dynamically.
[out]	pngBufferSize	The size of the buffer in bytes holding the compressed PNG.
[out]	pngSize	The size of the PNG data inside the buffer in bytes.

Returns:

1 on success, 0 on failure.

Definition at line 265 of file png.cpp.

int CxUtils::PNG::DecompressImage	(	const unsigned char *	png,
		const unsigned int	pngSize,
		unsigned char **	image,
		unsigned short *	width,
		unsigned short *	height,
		unsigned char *	channels
	)

Takes PNG data inside of a buffer and decompresses it to another buffer which will store the raw image.

Parameters:

[in]	png	Pointer to PNG data.
[in]	pngSize	The size in bytes of the PNG data.
[out]	image	Pointer to buffer which will store the result. If NULL or too small new memory will be allocated dynamically. Decompressed data will be in BGR format.
[out]	width	The width of the image decompressed.
[out]	height	The height of the image decompressed.
[out]	channels	The number of channels in the decompressed image.

Returns:

1 on success, 0 on failure.

Definition at line 112 of file png.cpp.

void CxUtils::PNG::ReadData	(	png_structp	png_ptr,
		png_bytep	data,
		png_size_t	length
	)

Definition at line 77 of file png.cpp.

void CxUtils::PNG::WriteData	(	png_structp	png_ptr,
		png_bytep	data,
		png_size_t	length
	)

Definition at line 228 of file png.cpp.