View source for EXIF

== gflBitmapHasEXIF ==

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

 GFL_BOOL <b>gflBitmapHasEXIF</b>(
   const GFL_BITMAP* bitmap
 );

'''Parameters'''

:bitmap 
::Pointer to a [[Structures#GFL_BITMAP|GFL_BITMAP]] structure. 

'''Return value'''
:The function returns GFL_TRUE if the bitmap has EXIF metadata. 

'''See also'''
:[[IPTC#gflBitmapHasIPTC|gflBitmapHasIPTC]], [[ICC#gflBitmapHasICCProfile|gflBitmapHasICCProfile]], [[#gflBitmapGetEXIF|gflBitmapGetEXIF]], [[#gflFreeEXIF|gflFreeEXIF]], [[#gflBitmapRemoveEXIFThumbnail|gflBitmapRemoveEXIFThumbnail]], [[Misc#gflBitmapRemoveMetaData|gflBitmapRemoveMetaData]]

== gflBitmapGetEXIF ==

The gflBitmapGetEXIF function returns EXIF metadata in a readable form. 

 GFL_EXIF_DATA* <b>gflBitmapGetEXIF</b>(
   const GFL_BITMAP* bitmap,  
   GFL_UINT32  flags
 );

'''Parameters'''

:bitmap 
::Pointer to a [[Structures#GFL_BITMAP|GFL_BITMAP]] structure. 
:flags 
::{|
|GFL_EXIF_WANT_MAKERNOTES||0x0001
|}

'''Return value'''
:The function returns a pointer to a [[Structures#GFL_EXIF_DATA|GFL_EXIF_DATA]] structure.

'''See also'''
:[[#gflBitmapHasEXIF|gflBitmapHasEXIF]], [[#gflFreeEXIF|gflFreeEXIF]]

== gflFreeEXIF ==

The gflFreeEXIF function frees memory allocated by gflBitmapGetEXIF function. 

 void <b>gflFreeEXIF</b>(
   GFL_EXIF_DATA* exif_data
 );

'''Parameters'''

:exif_data 
::Pointer to a [[Structures#GFL_EXIF_DATA|GFL_EXIF_DATA]] structure. 

'''See also'''
:[[#gflBitmapHasEXIF|gflBitmapHasEXIF]], [[#gflBitmapGetEXIF|gflBitmapGetEXIF]]


== gflBitmapGetEXIFValue == 

The gflBitmapGetEXIFValue allows to get a tag from EXIF metadata. 

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

'''Parameters'''

:bitmap
::Pointer to a [[Structures#GFL_BITMAP|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 [[Error|GFL_ERROR]]. 

'''See also'''
:[[#gflBitmapHasEXIF|gflBitmapHasEXIF]]

== gflBitmapRemoveEXIFThumbnail ==

The gflBitmapRemoveEXIFThumbnail function removes thumbnail from EXIF metadata. 

 void <b>gflBitmapRemoveEXIFThumbnail</b>(
   GFL_BITMAP* bitmap
 );

'''Parameters'''

:bitmap 
::Pointer to a [[Structures#GFL_BITMAP|GFL_BITMAP]] structure. 

'''See also'''
:[[#gflBitmapHasEXIF|gflBitmapHasEXIF]], [[#gflBitmapRemoveMetaData|gflBitmapRemoveMetaData]]

== gflBitmapGetEXIF2 ==

The gflBitmapGetEXIF2 function returns EXIF metadata in a readable form. 

 GFL_EXIF_DATAEX* <b>gflBitmapGetEXIF2</b>( 
   const GFL_BITMAP* bitmap 
 ); 

'''Parameters'''

:bitmap 
::Pointer to a [[Structures#GFL_BITMAP|GFL_BITMAP]] structure. 

'''Return value'''
:The function returns a pointer to a [[Structures#GFL_EXIF_DATAEX|GFL_EXIF_DATAEX]] structure.


== gflFreeEXIF2 ==

The gflFreeEXIF2 function frees memory allocated by gflBitmapGetEXIF2 function. 

 void <b>gflFreeEXIF2</b>( 
   GFL_EXIF_DATAEX* exif_data 
 ); 

'''Parameters'''

:exif_data 
::Pointer to a [[Structures#GFL_EXIF_DATAEX|GFL_EXIF_DATAEX]] structure. 


== gflBitmapSetEXIF2 ==

The gflBitmapSetEXIF2 function sets EXIF metadata to a bitmap. 

 void <b>gflBitmapSetEXIF2</b>( 
   GFL_BITMAP* bitmap, 
   const GFL_EXIF_DATAEX* exif_data 
 ); 

'''Parameters'''

:bitmap 
::Pointer to a [[Structures#GFL_BITMAP|GFL_BITMAP]] structure. 
:exif_data 
::Pointer to a [[Structures#GFL_EXIF_DATAEX|GFL_EXIF_DATAEX]] structure. 


== gflBitmapSetEXIFValueString2 ==

The gflBitmapSetEXIFValueString2 function sets a string for a tag. 

 void <b>gflBitmapSetEXIFValueString2</b>( 
   GFL_EXIF_DATAEX* exif_data, 
   GFL_UINT16 ifd, 
   GFL_UINT16 tag, 
   const char* value 
 ); 

'''Parameters'''

:exif_data 
::Pointer to a [[Structures#GFL_EXIF_DATAEX|GFL_EXIF_DATAEX]] structure. 
:ifd
::[[Structures#GFL_EXIF_DATA|IFD]] of the tag
:tag
::Tag to set
:value 
::Pointer to a null-terminated string that contains the value.

== gflBitmapSetEXIFValueInt2 ==

 void <b>gflBitmapSetEXIFValueInt2</b>( 
   GFL_EXIF_DATAEX* exif_data, 
   GFL_UINT16 ifd, 
   GFL_UINT16 tag, 
   GFL_UINT32 format, 
   GFL_UINT32 value 
 ); 

'''Parameters'''

:exif_data 
::Pointer to a [[Structures#GFL_EXIF_DATAEX|GFL_EXIF_DATAEX]] structure. 
:ifd
::[[Structures#GFL_EXIF_DATA|IFD]] of the tag
:tag
::Tag to set
:format
::[[Structures#GFL_EXIF_DATAEX|Format]] of the int value
:value 
::Integer value

== gflBitmapSetEXIFValueRational2 ==

 void <b>gflBitmapSetEXIFValueRational2</b>( 
   GFL_EXIF_DATAEX* exif_data, 
   GFL_UINT16 ifd, 
   GFL_UINT16 tag, 
   GFL_UINT32 p, 
   GFL_UINT32 q 
 ); 

'''Parameters'''

:exif_data 
::Pointer to a [[Structures#GFL_EXIF_DATAEX|GFL_EXIF_DATAEX]] structure. 
:ifd
::[[Structures#GFL_EXIF_DATA|IFD]] of the tag
:tag
::Tag to set
:p
::Numerator
:q
::Denominator

== gflBitmapSetEXIFValueRationalArray2 ==

 void <b>gflBitmapSetEXIFValueRationalArray2</b>( 
   GFL_EXIF_DATAEX* exif_data, 
   GFL_UINT16 ifd, 
   GFL_UINT16 tag, 
   const GFL_UINT32* pq, 
   GFL_INT32 count 
 ); 

'''Parameters'''

:exif_data 
::Pointer to a [[Structures#GFL_EXIF_DATAEX|GFL_EXIF_DATAEX]] structure. 
:ifd
::IFD of the tag
:tag
::Tag to set
:pq
::Array of numerator-denominator
:count
::Number of rational values