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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 4.iso
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cp.hlp
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@C1@c@b@_ Cut and Paste
Cut a rectangular region of an image and paste it at different
location or into another image.
@b Interaction
Use leftmouse to cut (or C key) and middlemouse (or P key) to
paste. Uu to undo last paste.
Click on Done or type Esc in the main window to exit.
@f Cut Size
To change the size of the cut region, use the following keyboard keys:
@f xX: Decrease/Increase the cut width
@f yY: Decrease/Increase the cut height
@f [1-9]: Step size
Click rightmouse for comprehensive size change. To finish, click away
from the small crosses.
@f Cut buffers
A cut buffer may be obtained by one of the following methods:
1. A direct screen read
2. Same region but via internal memory
3. import an external file.
Method 1 & 2 can be toggled by the ReadScr/Internal button. When
ReadScr is active, everything that falls within the cut region
will be read into the cut buffer, which may be useful in certain
situations to create special effects. In general, screen reads
should be avoided on machines with less than 24bitplanes.
To import an external image, click on the Import button. The imported
image can be of any bit supported format and behaves exactly the
same as a normal cut buffer except that it can not be named, thus
a new cut buffer or import overwrites the current imported image.
Note in method 2, the cut region is not allowed outside the image.
@f Modes of Operations
Toggle the Overwrite/Mask button to choose pasting method:
Overwrite: completely overwrites the region of the image that is
being pasted.
Masking: non-zero pixels in the cut buffer replace the corresponding
pixels in the image while leaving alone the pixels that
correspond to zero pixels in the cut buffer,
i.e., newpix = (mask ? mask:oldpix).
The Preview/Commit button controls if to modify the image when a
cut buffer is pasted. When Preview is active, pasting will only
modify the image in the framebuffer (that is, currently on screen),
but not the image in core. For that to happen, toggle on the
Commit mode.
In Commit mode or Mask mode, the paste region is not allowed outside
the image for obvious reasons. To paste outside the image, use
Preview and then do a crop with CropFill off to render it into the image.
@s@b Note
1. Mask mode has no effect for colormapped images.
2. If cut & paste is done across images, the pasted image will be in
RGB regardless what the original type is.
3. If importing an image larger than the current one, nothing meaningful
can be done. Do the reverse.