On Feb 23, 2006, at 12:05 PM, Mike Woodworth wrote:
On Feb 23, 2006, at 11:23 AM, Charles Yeomans wrote:
call LockPixels(pixmap)
baseaddr = GetPixBaseAddr(pixmap)
msgbox baseaddr.StringValue(0,1024) //<shows the same thign no
matter what picture
pixmap seems ok, lock pixels doesnt fail - but the pixelType always
returns "" and the baseaddr seems generic, perhaps its not really
the start of data(its padded somehow at the head?)
This may be because the baseAddr field of the PixMap for an offscreen
gworld is a handle, not a pointer.
--------------
Charles Yeomans
my impression (and i'm likely wrong) was that its a handle in the
struct, but that GetPixBaseAddr() returns the ptr behind the handle.
No, you're correct.
type = pixmap.OSTypeMBS(60) is returning a strange value because 60
isn't the right offset; I compute it to be 38. A PixMap struct is 50
bytes.
As for baseaddr.StringValue(0,1024), you might try creating a Picture
object and set the pixels to known values, then poke around and if you
can find them using these functions.
--------------
Charles Yeomans
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