#include "png_optimizer.h"

Inheritance diagram for pagespeed::image_compression::PngScanlineWriter:

Public Member Functions
	PngScanlineWriter (MessageHandler *handler)

virtual ScanlineStatus	InitWithStatus (const size_t width, const size_t height, PixelFormat pixel_format)

virtual ScanlineStatus	InitializeWriteWithStatus (const void params, GoogleString png_image)

virtual ScanlineStatus	WriteNextScanlineWithStatus (const void *scanline_bytes)
	Write a scanline with the data provided. Return false in case of error.

virtual ScanlineStatus	FinalizeWriteWithStatus ()

Public Member Functions inherited from pagespeed::image_compression::ScanlineWriterInterface
bool	Init (const size_t width, const size_t height, PixelFormat pixel_format)

bool	InitializeWrite (const void config, GoogleString const out)

bool	WriteNextScanline (const void *scanline_bytes)

bool	FinalizeWrite ()

Detailed Description

Class PngScanlineWriter writes a PNG image. It supports Gray_8, RGB_888, and RGBA_8888 formats.

Member Function Documentation

virtual ScanlineStatus pagespeed::image_compression::PngScanlineWriter::FinalizeWriteWithStatus ( )

virtual

Finalize write structure once all scanlines are written. If FinalizeWriter() is called before all of the scanlines have been written, the object will be reset to the initial state.

Implements pagespeed::image_compression::ScanlineWriterInterface.

virtual ScanlineStatus pagespeed::image_compression::PngScanlineWriter::InitializeWriteWithStatus	(	const void *	params,
		GoogleString *	png_image
	)

virtual

Initialize additional parameters for writing the image using 'params', which should be a PngCompressParams*. You can set 'params' to NULL to use the default compression configuration.

Implements pagespeed::image_compression::ScanlineWriterInterface.

virtual ScanlineStatus pagespeed::image_compression::PngScanlineWriter::InitWithStatus	(	const size_t	width,
		const size_t	height,
		PixelFormat	pixel_format
	)

virtual

Initialize the basic parameters for writing the image. Size of the image must be 1-by-1 or larger.

Implements pagespeed::image_compression::ScanlineWriterInterface.

The documentation for this class was generated from the following file:

pagespeed/kernel/image/png_optimizer.h

Public Member Functions

Detailed Description

Member Function Documentation