pagespeed::image_compression::JpegUtils Class Reference

Utility class that reads jpeg parameter from jpeg images. More...

#include "jpeg_utils.h"

Static Public Member Functions
static int	GetImageQualityFromImage (const void *image_data, size_t image_length, MessageHandler *handler)

Detailed Description

Utility class that reads jpeg parameter from jpeg images.

Member Function Documentation

static int pagespeed::image_compression::JpegUtils::GetImageQualityFromImage ( const void *  image_data, size_t  image_length, MessageHandler *  handler  )

static

Get image quality with which the input jpeg image is compressed. This method will return -1 if it is not able to either jpeg image is invalid or image quality can't be determined.

See comments in implementation for additional details on how quality is computed.

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

• pagespeed/kernel/image/jpeg_utils.h