In my application I am trying to draw thumbnails of different images on another image.

I took the sample code from following link http://developer.apple.com/documentation/Cocoa/Conceptual/CocoaDrawingGuide/index.html#//apple_ref/doc/uid/TP40003290 Which I have modified later for my requirements.

NSRect offscreenRect = NSMakeRect(0.0, 0.0, 1725.0, 1725.0); NSBitmapImageRep* offscreenRep = nil;

offscreenRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:nil pixelsWide:offscreenRect.size.width pixelsHigh:offscreenRect.size.height bitsPerSample:8 samplesPerPixel:4 hasAlpha:YES isPlanar:NO colorSpaceName:NSCalibratedRGBColorSpace bitmapFormat:0 bytesPerRow:(4 * offscreenRect.size.width) bitsPerPixel:32];

[NSGraphicsContext saveGraphicsState]; [NSGraphicsContext setCurrentContext:[NSGraphicsContext graphicsContextWithBitmapImageRep:offscreenRep]];

// Draw your content… NSBitmapImageRep* imageRep = [[NSBitmapImageRep alloc] initWithData:[NSData dataWithContentsOfFile:path]]; //Background image for the container bitmap rep

[imageRep drawInRect:NSMakeRect(0, 0, offscreenRep pixelsWide], offscreenRep pixelsHifh])];

[NSGraphicsContext restoreGraphicsState];

Problem: Only a small portion of the imageRep, is drawn on offscreenRep. I have made sure the reolution of offscreenRep to be greater than imageRep. So imageRep fits onto it. Any thing wrong in the above code?