CMYK Text of Photoshop Layer rendered incorrectly
CMYK Text of Photoshop Layer rendered incorrectly
- Subject: CMYK Text of Photoshop Layer rendered incorrectly
- From: Peter Krajčík <email@hidden>
- Date: Mon, 18 Oct 2010 14:53:10 +0200
Hi,
I am reading Photoshop layer images using this approach:
(simplified code)
for (i=0; i <= imageCount; i++)
{
unsigned long offset, size;
GraphicsImportSetImageIndex(importer, i);
GraphicsImportGetDataOffsetAndSize(importer, &offset, &size);
// create a Graphics Exporter component that will write Photoshop data
OSErr err = OpenADefaultComponent(GraphicsExporterComponentType,kQTFileTypePhotoShop, &exporter);
if (err == noErr)
{
// set export parameters
Handle bmpDataH = NewHandle(0);
GraphicsExportSetInputGraphicsImporter(exporter, importer);
GraphicsExportSetOutputHandle(exporter, bmpDataH);
// export data to BMP into handle
unsigned long actualSizeWritten = 0;
err = GraphicsExportDoExport(exporter, &actualSizeWritten);
if (err == noErr)
{
HLock(bmpDataH);
//create a simple image with the tiff data, without the bound information, its rep will stored to layer as CGImageRef
id image = [CIImage imageWithData:[NSData dataWithBytes:*bmpDataHlength:GetHandleSize(bmpDataH)]];
NSBitmapImageRep* rep = [[[NSBitmapImageRep alloc] initWithCIImage:image]autorelease];
CGImageRef imageRef = rep.CGImage;
self.layerImage =CGImageRetain(imageRef);
HUnlock(bmpDataH);
}
DisposeHandle(bmpDataH);
CloseComponent(exporter);
}
}
It works as expected, but when I open a psd file that has layers with TEXT (not rendered) and in CMYK color space, it looks like alpha channel of such layer is igonred and I'm getting a black rect instead (with text on top of it).
I have read in some old post (2005) that is is a bug in Apple importer.
The fact is that I didn't find other way how to read in images from psd files.
A. Is there any tip how to fix the CMYK-TEXT alpha problem I described ?
B. Is there any other way how to read photoshop layer images ?
Thank you.
Peter_______________________________________________
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