Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!rutgers!ucla-cs!zen!ucbvax!dewey.soe.berkeley.edu!oster
From: oster@dewey.soe.berkeley.edu (David Phillip Oster)
Newsgroups: comp.sys.mac
Subject: Re: Delphi digest volume 3, issue 36
Message-ID: <19944@ucbvax.BERKELEY.EDU>
Date: Mon, 3-Aug-87 20:05:34 EDT
Article-I.D.: ucbvax.19944
Posted: Mon Aug  3 20:05:34 1987
Date-Received: Tue, 4-Aug-87 06:16:28 EDT
References: <2640@husc6.UUCP>
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: oster@dewey.soe.berkeley.edu.UUCP (David Phillip Oster)
Distribution: world
Organization: School of Education, UC-Berkeley
Lines: 49

In article <2640@husc6.UUCP> fry@huma1.UUCP (David Fry) writes:
>From: JIMH
>Subject: changing pixel depth
>Does anyone know how the monitor cdev cause the desktop (or any
>programs) to redraw themselve with the new screen depth?  I want a fkey
>to toggle between 1 and 8 bit mode.  It pretty straightforward to set
>the mode to whatever depth you need and when you r elaunch the finder
>(return to finder you have new depth set. what is less straightforward
>is to get the desktop to draw itself without a launch.  best jim

The following works well:

1.) Get a rectangle as big as the entire desktop (all the multiple
displays):

bigRect = (**GrayRgn).rgnBBox;

2.) turn painting of new windows off, so we'll get a transparent window:

saveWhite = paintWhite;
paintWhite = 0;

3.) Create a new, big window, in front of everything

tempWindow = NewWindow(...

4.) DisposeWindow(tempWindow) and restore paintWhite

This makes the window manager send everybody an update event, and things
are just cool.


Now: I've got a problem of my own:

I'd like to extend Stars so that it does the right thing on a color
display.  One of the things I want to do is do a smooth fade to black by
playing with the color table, then at the end of Stars, restore the
original color table.  I've written code that uses SetEntries to smoothly
decrease the brightness of all the colors until the whole screen is black.

The problem is that some things call ReserveEntires and ProtectEntries,
and my call to SetEntries won't change these slots in the color table.
How do I find out which slots are protected so that I can temporarily
un-protect them?  How do I convince the system to let me re-protect
them under their old owners?  Is there an easier way to do this right?

--- David Phillip Oster            --My Good News: "I'm a perfectionist."
Arpa: oster@dewey.soe.berkeley.edu --My Bad News: "I don't charge by the hour."
Uucp: {seismo,decvax,...}!ucbvax!oster%dewey.soe.berkeley.edu