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//
// NSImage+PICTHandle.m
// IconKit
//
// Copyright (c) 2003, Florent Pillet, All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
// Headers:
// -----------------------------------------------------------------------------
#import "NSImage+PICTHandle.h"
// -----------------------------------------------------------------------------
// Prototypes:
// -----------------------------------------------------------------------------
Handle UKBitmapImageCreateHandleDataRef(
Handle dataHandle,
Str255 fileName,
OSType fileType,
StringPtr mimeTypeString,
Ptr initDataPtr,
Size initDataByteCount);
// -----------------------------------------------------------------------------
// Categories:
// -----------------------------------------------------------------------------
@implementation NSImage (PICTHandle)
-(Handle) TIFFHandle
{
NSData *pngData = [self TIFFRepresentation];
if (pngData == nil)
return NULL;
Handle pngDataH = NewHandle([pngData length]);
PtrToHand([pngData bytes], &pngDataH, [pngData length]);
return pngDataH;
}
-(PicHandle) PICTHandle
{
Handle pngDataH = [self TIFFHandle];
if (pngDataH == NULL)
return NULL;
Handle dataRef = UKBitmapImageCreateHandleDataRef(pngDataH, "\pdummy.tif", kQTFileTypeTIFF, nil, nil, 0);
// create a Graphics Importer component
ComponentInstance importComponent=0;
OSErr err = GetGraphicsImporterForDataRef(dataRef, HandleDataHandlerSubType, &importComponent);
DisposeHandle(dataRef);
if (err != noErr)
{
NSLog(@"Error %d when trying to create a graphics importer component", (int)err);
CloseComponent(importComponent);
DisposeHandle(pngDataH);
return NULL;
}
// export data to PICT
PicHandle pictDataH = NULL;
if (GraphicsImportGetAsPicture(importComponent, &pictDataH) != noErr)
{
NSLog(@"Error %d when trying to export data as PICT via QuickTime", (int)err);
CloseComponent(importComponent);
DisposeHandle(pngDataH);
return NULL;
}
CloseComponent(importComponent);
DisposeHandle(pngDataH);
return pictDataH;
}
-(NSData*) PICTData
{
NSArray *reps = [self representations];
NSEnumerator *iter = [reps objectEnumerator];
NSImageRep *rep;
while (rep = [iter nextObject])
{
// easy case: there is already a PICT representation in the image
if ([rep isMemberOfClass:[NSPICTImageRep class]])
return [(NSPICTImageRep*)rep PICTRepresentation];
}
// obtain a PICT handle
PicHandle pictDataH = [self PICTHandle];
if (pictDataH == NULL)
return nil;
// create a NSData block with the data
HLock((Handle)pictDataH);
NSData *pictData = [NSData dataWithBytes:*pictDataH length:GetHandleSize((Handle)pictDataH)];
HUnlock((Handle)pictDataH);
DisposeHandle((Handle)pictDataH);
return pictData;
}
@end
/*
* UKBitmapImageCreateHandleDataRef
*
* Tortuous function taken from Apple's Technote 1195 that creates
* a dataRef for quicktime indicating which data format is stored
* in the data
*
*/
Handle UKBitmapImageCreateHandleDataRef(
Handle dataHandle,
Str255 fileName,
OSType fileType,
StringPtr mimeTypeString,
Ptr initDataPtr,
Size initDataByteCount)
{
OSErr err;
Handle dataRef = nil;
Str31 tempName;
long atoms[3];
StringPtr name;
// First create a data reference handle for our data
err = PtrToHand( &dataHandle, &dataRef, sizeof(Handle));
if (err) goto bail;
// If this is QuickTime 3 or later, we can add
// the filename to the data ref to help importer
// finding process. Find uses the extension.
name = fileName;
if (name == nil)
{
tempName[0] = 0;
name = tempName;
}
// Only add the file name if we are also adding a
// file type, MIME type or initialization data
if (fileType || mimeTypeString || initDataPtr)
{
err = PtrAndHand(name, dataRef, name[0]+1);
if (err)
goto bail;
}
// If this is QuickTime 4, the handle data handler
// can also be told the filetype and/or
// MIME type by adding data ref extensions. These
// help the importer finding process.
// NOTE: If you add either of these, you MUST add
// a filename first -- even if it is an empty Pascal
// string. Under QuickTime 3, any data ref extensions
// will be ignored.
// to add file type, you add a classic atom followed
// by the Mac OS filetype for the kind of file
if (fileType)
{
atoms[0] = EndianU32_NtoB(sizeof(long) * 3);
atoms[1] = EndianU32_NtoB(kDataRefExtensionMacOSFileType);
atoms[2] = EndianU32_NtoB(fileType);
err = PtrAndHand(atoms, dataRef, sizeof(long) * 3);
if (err)
goto bail;
}
// to add MIME type information, add a classic atom followed by
// a Pascal string holding the MIME type
if (mimeTypeString)
{
atoms[0] = EndianU32_NtoB(sizeof(long) * 2 + mimeTypeString[0]+1);
atoms[1] = EndianU32_NtoB(kDataRefExtensionMIMEType);
err = PtrAndHand(atoms, dataRef, sizeof(long) * 2);
if (err)
goto bail;
err = PtrAndHand(mimeTypeString, dataRef, mimeTypeString[0]+1);
if (err)
goto bail;
}
// add any initialization data, but only if a dataHandle was
// not already specified (any initialization data is ignored
// in this case)
if(dataHandle == nil && initDataPtr)
{
atoms[0] = EndianU32_NtoB(sizeof(long) * 2 + initDataByteCount);
atoms[1] = EndianU32_NtoB(kDataRefExtensionInitializationData);
err = PtrAndHand(atoms, dataRef, sizeof(long) * 2);
if (err)
goto bail;
err = PtrAndHand(initDataPtr, dataRef, initDataByteCount);
if (err)
goto bail;
}
return dataRef;
bail:
if (dataRef)
DisposeHandle(dataRef);
return nil;
}
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