EXIF

gflBitmapHasEXIF

The gflBitmapHasEXIF function is used to know if the picture has EXIF metadata.

GFL_BOOL gflBitmapHasEXIF(
  const GFL_BITMAP* bitmap
);

Parameters

bitmap

Pointer to a GFL_BITMAP structure.

Return value

The function returns GFL_TRUE if the bitmap has EXIF metadata.

See also

gflBitmapHasIPTC, gflBitmapGetEXIF, gflFreeEXIF, gflBitmapRemoveEXIFThumbnail, gflBitmapRemoveMetaData

gflBitmapGetEXIF

The gflBitmapGetEXIF function returns EXIF metadata in a readable form.

GFL_EXIF_DATA* gflBitmapGetEXIF(
  const GFL_BITMAP* bitmap,  
  GFL_UINT32  flags
);

Parameters

bitmap

Pointer to a GFL_BITMAP structure.

flags

GFL_EXIF_WANT_MAKERNOTES

0x0001

Return value

The function returns a pointer to a GFL_EXIF_DATA structure.

See also

gflBitmapHasEXIF, gflFreeEXIF

gflFreeEXIF

The gflFreeEXIF function frees memory allocated by gflBitmapGetEXIF function.

void gflFreeEXIF(
  GFL_EXIF_DATA* exif_data
);

Parameters

exif_data

Pointer to a GFL_EXIF_DATA structure.

See also

gflBitmapHasEXIF, gflBitmapGetEXIF

gflBitmapGetEXIFValue

The gflBitmapGetEXIFValue allow to get a tag from EXIF metadata.

GFL_ERROR gflBitmapGetEXIFValue(
  const GFL_BITMAP* bitmap, 
  GFL_UINT32 tag, 
  char* value, 
  GFL_INT32 value_length
); 

Parameters

bitmap

Pointer to a GFL_BITMAP structure

tag

EXIF tag

value

Pointer to a char array (string)

value_length

Maximum length of the string

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.

See also

gflBitmapHasEXIF

gflBitmapRemoveEXIFThumbnail

The gflBitmapRemoveEXIFThumbnail function remove thumbnail from EXIF metadata.

GFL_ERROR gflBitmapRemoveEXIFThumbnail(
  GFL_BITMAP* bitmap
);

Parameters

bitmap

Pointer to a GFL_BITMAP structure.

See also

gflBitmapHasEXIF, gflBitmapRemoveMetaData