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1994-06-22
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Format Panel
.LANGUAGE english English anglais
HELP for the IMAGE FORMAT PANEL
****************************************
This Dialog Box lets you choose the proportions of the image with the Format
Button Menu and select the image Size with the Resolution Button Menu.
"Format" Button Menu
-------------------
There are 6 choices:
CRT - 1280 x 1024 pixels to fill the typical SGI CRT
35mm - 1280 x 853 35mm slide proportions
NTSC - 640 x 480 for video proportions
Cine35 - 1280 x 934 for 35mm film proportions
Custom - W x H set in the resource file by the user
Window - 640 x 480 by default from the resource file.
Four of the above settings (35mm, NTSC, Cine35 & Custom) are easily set by
the user, for his own environment, by changing the following resource file
parameters in the Imf or Imf.* files in the directory ./config/res:
*mm35Width: 1280
*mm35Height: 853
*ntscWidth: 640
*ntscHeight: 480
*cine35Width: 1280
*cine35Height: 934
*customWidth: 320
*customHeight: 240
"Normal size" Display Window
--------------------------
The top pair of number fields ("Normal size") displays the actual size of
the current WW when in the "Window" Format. In the other Formats, these
2 numbers show the maximum size of the image that will actually be
displayed on the CRT when the "Resolution" Menu Selection Button "1-1"
item is selected. Note that the WW image size is immaterial when the WW
scroll bars are available.
"Resolution" Button Menu
----------------------
For selecting the actual size of the computed image (in RAM
or Saved to disk), regardless of the Size of the WW display area:
1/8 - computed image is 1/8 of the Normal size;
1/4 - computed image is 1/4 of the Normal size;
1/2 - computed image is 1/2 of the Normal size;
1-1 - computed image IS the Normal size;
2* - computed image is 2 times the Normal size;
4* - computed image is 4 times the Normal size;
8* - computed image is 8 times the Normal size.
NOTES:
a) "Resolution" does NOT apply to the special "Compute Directly to Disk"
images that can be created for 2K x 2K, 4K x 4K and 8K x 8K images.
b) The 2K x 2K, 4K x 4K and 8K x 8K images can be created, in principle,
by either computing to an array in RAM (the default method) or by
computing directly to disk. However, very few systems will have the
RAM and/or Disk swapping space for the largest of these images,
especially since the image must momentarily exist in both RAM (almost
certainly requiring a large disk swap partition) and on the user's
disk volume. Even if you did have the disk space, unless you had
enough RAM to contain the entire uncompressed image array, you would
find that the resultant swapping resulted in a very slow system.
.LANGUAGE french French Francais
C'est le help pour la Format Panel