On Tuesday, December 30, 2003, at 09:34 PM, Ken Norris wrote:
The problems for me come when I try to import something from one of my cheap
external paint programs that just don't show up properly in Rev images,
mainly because of cross-platform compatibility I think. I end up having to
additionally take them into PhotoShop or somewhere else and resetting
filetypes. Very time consuming experiments.
I often have problems with downloaded images. I suspect that image file creators and/or Revolution are not handling some things correctly.
I have had very little success with pasting. I import.
I just discovered that the PNG type you get from clipboard["image"] does not behave as I expected.
--------------------1) If we can 'export snapshot' into an image, it should produce an 8-bit image rectangle with white pixels outside the paint area to the edges of the rectangle.
Except I don't know about "8-bit", I'd say yes.
Yes, I see what you mean. What I'm getting at is that maskData, like stuff
you paint with the Paint Palette, only works with 8-bit colors.
I looked at the data you get from the 'text' property of an image. It is PNG. The one I looked at had gamma info. It had a palette with an alpha augmentation.
I don't know what you mean with maskData and 8-bit colors.
---------------------If I 'export snapshot' into an 'image' will it automatically convert to an image format, i.e., Rev's own 1-byte proprietary format?
I don't know. I export to a variable as PNG. I suspect this is the
same as a PNG file, but I have not checked. I set the text property of
the image to the variable value. An image shows up. I don't know
about the proprietary format.
Well, like I said, I'm only concerned with maskData at this juncture. I
don't know what the dynamic color range of a regular PNG is. If it is higher
than 8-bit, then it probably can't be used as a mask for windowShapes,
unless Rev somehow switches it into a Rev-proprietary 8-bit inmage.
It is quite variable.
What I mean is that I know it works with PNG. I think it did not work with some other type. If you want to use export snapshot, then you might need to specify PNG.
However, you probably want _import_ snapshot and that avoids the whole issue. Sorry about the bunny trail.
----------------------You still have to go through every pixel and re-render, right?
Yes, but in the simplest case, you build a new maskData based on image data. It will be fastest to accumulate in order. This build does not need to know the height and width (formatted) because it makes a pixel transformation.
??? This is what I don't understand. How does it work? ImageData is a 32-bit
thing, 4 bytes/pixel. According to the docs, maskData is 8-bit (1
byte/pixel) only. I mean, sure, you can make a pixel which only uses 8 of
its 32 bits, but that doesn't change it's actual depth, IOW, it's still a 32
bit pixel, and I would think that any image made with it cannot be used as
maskData unless you convert it somehow.
So, is this the "transformation" you speak of? Again, how does it work? I
haven't succeeded in making an 8-bit mask from a 32-bit image in Rev. I can
do it very easily in other Mac-only venues, but not here, so far.
This should be a 10 to 20 line function in the simple case. I'll send something later, I'm being called.
Dar Scott
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