nn::jpeg::CTR::JpegMpDecoder::ExtractExif Member Function

#include <nn/jpeg.h>

bool ExtractExif(
     const u8 * src,
     size_t srcSize,
     bool extractThumbnail
);

	Name	Description
in	src	Specifies the JPEG data to decode.
in	srcSize	Specifies the size of src in bytes.
in	extractThumbnail	Specify true to extract the thumbnail image size. Specify false to extract the primary image size. Fails if true is specified but no thumbnail is found.

Returns true on success. Even if no Exif information exists this function will return true if it is possible to obtain the image size.
Returns false on failure. Use the GetLastError function to get the reason for failure.

Extracts Exif information.

Because this function does not decode the image, it can get information more quickly than the StartJpegDecoder function.

To actually get the information included in EXIF, call this function first, and after it has succeeded, use the GetLast functions below.

• GetLastDateTime
• GetLastSoftwarePointer
• GetLastSoftwareLength
• GetLastUserMakerNotePointer
• GetLastUserMakerNoteSize
• GetLastTwlPhotoMakerNote
• GetLastTwlUserMakerNotePointer
• GetLastTwlUserMakerNoteSize
• GetLastImageUid
• GetLastOrientation
• GetLastGpsData

Use the GetLastWidth and GetLastHeight functions to get the image size of either the primary or thumbnail images.

Image decoding might fail even if this function succeeds.

2010/06/14

Initial version.