godot/thirdparty/jpeg-compressor/jpge.h

// jpge.h - C++ class for JPEG compression.
// Public Domain or Apache 2.0, Richard Geldreich <[email protected]>
// Alex Evans: Added RGBA support, linear memory allocator.
#ifndef JPEG_ENCODER_H
#define JPEG_ENCODER_H

namespace jpge
{
	uint8;
	int16;
	int32;
	uint16;
	uint32;
	uint;

	// JPEG chroma subsampling factors. Y_ONLY (grayscale images) and H2V2 (color images) are the most common.
	enum subsampling_t { … };

	// JPEG compression parameters structure.
	struct params
	{ … };

	// Writes JPEG image to a file. 
	// num_channels must be 1 (Y) or 3 (RGB), image pitch must be width*num_channels.
	bool compress_image_to_jpeg_file(const char* pFilename, int width, int height, int num_channels, const uint8* pImage_data, const params& comp_params = params());

	// Writes JPEG image to memory buffer. 
	// On entry, buf_size is the size of the output buffer pointed at by pBuf, which should be at least ~1024 bytes. 
	// If return value is true, buf_size will be set to the size of the compressed data.
	bool compress_image_to_jpeg_file_in_memory(void* pBuf, int& buf_size, int width, int height, int num_channels, const uint8* pImage_data, const params& comp_params = params());

	// Output stream abstract class - used by the jpeg_encoder class to write to the output stream. 
	// put_buf() is generally called with len==JPGE_OUT_BUF_SIZE bytes, but for headers it'll be called with smaller amounts.
	class output_stream
	{ … };

	// Lower level jpeg_encoder class - useful if more control is needed than the above helper functions.
	class jpeg_encoder
	{ … };

} // namespace jpge

#endif // JPEG_ENCODER