I have an offscreen window containing a WebView that I'm using to
generate web previews. My current code works beautifully and looks
like this:
NSView *view = previewWebView.mainFrame.frameView.documentView;
NSRect targetRect = view.bounds;
NSBitmapImageRep *imageRep = [view
bitmapImageRepForCachingDisplayInRect:targetRect];
unsigned char *bitmapData = [imageRep bitmapData];
if (bitmapData != NULL)
bzero(bitmapData, [imageRep bytesPerRow] * [imageRep
pixelsHigh]);
[view cacheDisplayInRect:targetRect toBitmapImageRep:imageRep];
NSImage *renderedImage = [[NSImage alloc] initWithSize:[imageRep
size]];
[renderedImage addRepresentation:imageRep];
However, I'm really only interested in the first page or so of data.
So I figure I just make targetRect smaller by making the height the
same as the width (if it's larger) prior to creating the image rep,
like so:
if( NSHeight(targetRect) > NSWidth(targetRect) )
targetRect.size.height = NSWidth(targetRect);
This either produces an empty image rep or a chunk of the image the
size of the intersection of the visible area of view and the rect
you'd get if targetRect was aligned to the bottom left (however view
is flipped). Manipulating targetRect doesn't seem to help.
I'm stumped, any ideas?
->Ben
--
Ben Lachman
Acacia Tree Software
http://acaciatreesoftware.com
email: blach...@mac.com
twitter: @benlachman
mobile: 740.590.0009
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