> Then you definitely want to create your own NSBitmapImageRep — the
> init method will give you total control over the pixel format. Then
> you can lockFocus and draw whatever you want into it.
So I have created this:
imageRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:NULL
pixelsWide:width
pixelsHigh:height
bitsPerSample:8
samplesPerPixel:4
hasAlpha:YES
isPlanar:NO
colorSpaceName:NSDeviceRGBColorSpace
bitmapFormat:NSAlphaFirstBitmapFormat
bytesPerRow:width * 4
bitsPerPixel:32];
baseAddr = [imageRep bitmapData];
So I have a pixel buffer... Now I need to:
(1) draw an NSImage into this bitmap... Without making a copy of the data
because after the image is drawn on my bitmap I will do a bunch of direct
pixel manipulation on it (from baseAddr), then I need to
(2) draw some semi-opaque text over the bitmap and finally
(3) save it as a new jpg.
Any help is appreciated... I am coming from a Gworld/QuickDraw background so
this is all a lot to absorb!
Thanks,
Trygve
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