InDesign SDK  20.5
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IImageFormatAccess Class Referenceabstract

#include <IImageFormatAccess.h>

Inheritance diagram for IImageFormatAccess:
IPMUnknown

Public Types

enum  { kDefaultIID = IID_IIMAGEFORMATACCESS }
 

Public Member Functions

virtual void SetFormatClassID (ClassID classID)=0
 
virtual ClassID GetFormatClassID () const =0
 
virtual void SetWhichImage (uint32 whichImage)=0
 
virtual uint32 GetWhichImage () const =0
 
- Public Member Functions inherited from IPMUnknown
virtual IPMUnknown * QueryInterface (PMIID interfaceID) const =0
 
virtual void AddRef () const =0
 
virtual void Release () const =0
 

Detailed Description

Interface living off of an image boss which stores the format of the reader needed to read the image data.

Member Enumeration Documentation

anonymous enum

default IID for this interface

Member Function Documentation

virtual ClassID IImageFormatAccess::GetFormatClassID () const
pure virtual
Returns
Retrieve the ClassID of the read filter
virtual uint32 IImageFormatAccess::GetWhichImage () const
pure virtual

OBSOLETE: See comments for SetWhichImage()

virtual void IImageFormatAccess::SetFormatClassID (ClassID classID)
pure virtual

We store the class ID of the image format plug-in that can read the image data. In this way we can avoid finding the correct image format plug-in every time we render and/or export the image.

Parameters
classID- IN: ClassID of the read filter's plug-in. Examples, kPSImageReadFormatBoss, kJPEGImageReadFormatBoss, kTIFFImageReadFormatBoss
virtual void IImageFormatAccess::SetWhichImage (uint32 whichImage)
pure virtual

OBSOLETE This tells us which image in the file we are. TIFF, for instance, allows for more than one image per file: a low res and a high res version in our case. whichImage takes on either kPMHighResImage or kPMLowResImage (defined in ImageTypes.h) OBSOLETE: Some formats, such as TIFF, may have several images per file. Hence, two constants are not enough to distinguish which image is in use. Instead, the image resolution can be used as an identifier. Each InDesign Class (boss) containing an IImageFormatAccess interface should also have an IImageAttributes interface which contain resolution tags.