My original code using Quartz to render a PDF into a jpeg supported rotations but couldn't zoom in. Thanks to Sven Hoffman, I can now zoom in by using NSImage directly, but now I get a bizarre result when I try to rotate. I've already searched through the list archives, but I can't find anyone whose seen quite this issue:
1. I have a source image, say 240x320.
2. I create a target image, 320x240.
3. I create the NSAffine transform with the translations and rotations as I found in various items in this mail list.
4. Checking with the debugger, the resulting target image is still 320x240.
5. I create a bitmap representation using initWithFocusedViewRect.
6. The size of the resulting image is 240x240?!?
The worst part is that the resulting image isn't cropped, it's *squashed* - it's been scaled down in the longer direction.
The first, obvious, possibility is that rotations require square images, but I didn't see that documented anywhere. Can anyone shed any light on this problem?
Here's the relevant code fragment:
bmpRect = NSMakeRect(0.0,0.0,bmpSize.width,bmpSize.height);
if (pdfFileOrientation == PDFFilePortrait) {
docRect = bmpRect;
} else {
docRect = NSMakeRect(0.0,0.0,bmpSize.height,bmpSize.width);
}
[bmpImage lockFocus];
if (landscapeMode) {
[rot set];
}
NSBezierPath *bp = [NSBezierPath bezierPathWithRect:bmpRect];
[[NSColor whiteColor] set];
[bp fill];
[document drawInRect:bmpRect
fromRect:docRect
operation:NSCompositeSourceOver
fraction:1.0];
NSBitmapImageRep *bitmap = [[NSBitmapImageRep alloc] initWithFocusedViewRect:bmpRect];
[bmpImage unlockFocus];
NSData *jpeg = [[bitmap representationUsingType:NSJPEGFileType properties:dict] retain];
[bitmap release];
