Inheritance diagram for pagespeed::image_compression::WebpFrameWriter:

Public Member Functions
	WebpFrameWriter (MessageHandler *handler)

virtual ScanlineStatus	Initialize (const void config, GoogleString out)

virtual ScanlineStatus	PrepareImage (const ImageSpec *image_spec)

virtual ScanlineStatus	PrepareNextFrame (const FrameSpec *frame_spec)
	frame_spec must remain valid while the frame is being written.

virtual ScanlineStatus	WriteNextScanline (const void *scanline_bytes)

virtual ScanlineStatus	FinalizeWrite ()

Public Member Functions inherited from pagespeed::image_compression::MultipleFrameWriter
	MultipleFrameWriter (MessageHandler *handler)

MessageHandler *	message_handler () const

bool	Initialize (const void config, GoogleString out, ScanlineStatus *status)

bool	PrepareImage (const ImageSpec image_spec, ScanlineStatus status)

bool	PrepareNextFrame (const FrameSpec frame_spec, ScanlineStatus status)

bool	WriteNextScanline (const void scanline_bytes, ScanlineStatus status)

bool	FinalizeWrite (ScanlineStatus *status)

Member Function Documentation

virtual ScanlineStatus pagespeed::image_compression::WebpFrameWriter::FinalizeWrite ( )

virtual

Note that even after WriteNextScanline() has been called, Initialize() and FinalizeWrite() may be called repeatedly to write the image with, say, different configs.

Implements pagespeed::image_compression::MultipleFrameWriter.

virtual ScanlineStatus pagespeed::image_compression::WebpFrameWriter::Initialize	(	const void *	config,
		GoogleString *	out
	)

virtual

Sets the WebP configuration to be 'config', which should be a WebpConfiguration* and should not be NULL.

Implements pagespeed::image_compression::MultipleFrameWriter.

virtual ScanlineStatus pagespeed::image_compression::WebpFrameWriter::PrepareImage ( const ImageSpec * image_spec )

virtual

image_spec must remain valid for the lifetime of WebpFrameWriter.

Implements pagespeed::image_compression::MultipleFrameWriter.

virtual ScanlineStatus pagespeed::image_compression::WebpFrameWriter::WriteNextScanline ( const void * scanline_bytes )

virtual

Writes 'scanline_bytes' to the next scanline of the current frame. The scanline's width in pixels and pixel format (and thus, its width in bytes) are as set in the preceding call to PrepareNextFrame(); that many bytes from '*scanline_bytes' are read.

Implements pagespeed::image_compression::MultipleFrameWriter.

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

pagespeed/kernel/image/webp_optimizer.h

Public Member Functions

Member Function Documentation