Minos111998
asked on
Simple Q: What is a mask?
A very simple question.
When I talk about applying a mask to an image to make it transparent, is the mask the area which is going to be transparent, or is it the area of the image which is NOT going to be transparent. ???
I keep getting confused.
When I talk about applying a mask to an image to make it transparent, is the mask the area which is going to be transparent, or is it the area of the image which is NOT going to be transparent. ???
I keep getting confused.
ASKER
Sorry, so is the mask the area which will be seen finally, or is it the area which is going to be removed?
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
I forgot to say that the ternary raster operations are so calles because they need: a source bitmap, a destination bitmap, and a brush. The Raster operation (ROP) code determines how they're combined.
What will you use this for?
Trillo
What will you use this for?
Trillo
ASKER
Bingo!
Now that really answered my question. Thanks. It's just that I seemed to have neglected that there are many ROPs available.
Thanks again.
And by the way, do you know if it is possible to somehow use a bitmap mask to generate a region? For clipping and so on, because the only region creating functions I know of uses RECTs or elipse and so on, eg CreateRectRgn, CreatePolygonRgnm CreateEllipticRgn etc.
Is it possible to use a bitmap mask to create a region instead?
Now that really answered my question. Thanks. It's just that I seemed to have neglected that there are many ROPs available.
Thanks again.
And by the way, do you know if it is possible to somehow use a bitmap mask to generate a region? For clipping and so on, because the only region creating functions I know of uses RECTs or elipse and so on, eg CreateRectRgn, CreatePolygonRgnm CreateEllipticRgn etc.
Is it possible to use a bitmap mask to create a region instead?
Actually I don't know how to use a bitmap as a region... but someone asked the same question one or two weeks ago and it's answered by someone, you can search in the <paq> questions, but I if I remember well I saw it in the C++ area.
Masks enable you to hide and reveal parts of a layer and to apply special effects with precision. Masks can be created from selections, from images, from the luminance values of images, and from scratch.
A Mask can cover a layer completely or with varying levels of opacity. It is 256 grey scale image, and the levels of grey correspond to the levels of masking. Because it is grey scale, a mask can be saved into an alpha channel.