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Conference bulova::decw_jan-89_to_nov-90

Title:	DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:	See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:	STAR::VATNE

Created:	Mon Oct 30 1989
Last Modified:	Mon Dec 31 1990
Last Successful Update:	Fri Jun 06 1997
Number of topics:	3726
Total number of notes:	19516

3438.0. "decw$server_density = 75 on SPX; what does WidthMMOfScreen mean?" by GOBBLR::MULHEREN (Kelly Mulheren, Digital Extended Toolkit) Fri Oct 05 1990 19:17

Hi,

I believe this has been discussed before but I can't seem to find it.

I have a question about the decw$server_density symbol as it relates to
the information obtained from WidthMMOfScreen and HeightMMOfScreen. From
the 5.4 Upgrade and Installation Manual and discussions here, I understand
that this symbol controls whether the server uses 100 dpi fonts or not.
However, I'm surprised to find that it also affects the WidthMMOfScreen
and HeightMMOfScreen.

On my VS3100 Mod. 48 running VMS V5.4, when decw$server_density = 75, 
they yield width = 433 mm, height = 346 mm. When decw$server_density = 100,
they return something a little closer to physical reality. Can someone
please enlighten me on this? This is causing us grief in GObE's DDIF
implementation since we need to generate DDIF that closely approximates
screen appearance, i.e. WYSIWYG.

QAR material or bad user at workstation?

Thanks,

kelly

T.R	Title	User	Personal Name	Date	Lines
3438.1		CLTMAX::dick	Schoeller - Failed Xperiment	`Fri Oct 05 1990 19:45`	15
	The only way that the server can know the physical size of the screen is through the use of decw$server_density (there is no way to query the monitor). This is used along with the size in pixels (which the server can query) to calculate the size of the screen in millimeters. It is also used to select which font directory to look in first for fonts. In theory, the correct way to select small fonts on a 100dpi screen (like the SPX) is not to say that you are 75dpi but rather to customize font selection on the widget classes to the 75dpi fonts (or to the small 100dpi fonts). However, most of us do the "wrong" thing 8^{). This is NOT QAR material it is a conflict between the user's actions and his goals. Dick
3438.2	SPX is closer to 90 DPI so 100 DPI is the `correct' setting and the closest you'll get to WYSIWYG	CVG::PETTENGILL	mulp	`Tue Oct 09 1990 03:13`	0
3438.3	VT1300 = 100dpi, VS3100 = 75dpi	ALEXWS::ALEX	Bugs are coming in triplets ...	`Wed Oct 10 1990 09:36`	6
	BTW, VT1300 (SPX isn't it) defaults to 100dpi, but VS3100/SPX defaults to 75dpi if system manager does not change it Alex
3438.4		DECWIN::FISHER	I like my species the way it is" "A narrow view...	`Wed Oct 10 1990 20:44`	10
	BTW, an "SPX" is not 90 dpi. The SPX knows nothing about density. All it knows about is the number of pixels. Density depends on which monitor you buy with it. If you get a VR297, you get about 90. If you get a VR290, you get about 75 (both require the SPX to be set for 1024x768 pixels). If you get a VRT19, you get about 100 DPI, and the SPX hardware must be set for 1280x1024 pixels. You can also get smaller color monitors which would be 1024x768, but 100 dpi. Burns