dale@boing.UUCP (Dale Luck) (04/25/89)
If I have set a particular line style/width or drawing mode in the GC but I have not called ValidateGC yet, is the server guarenteed to use the previous values or is the operation indeterminate? There may be some servers that interpret the values of the GC directly when they draw their bits instead of waiting for the proper function to be loaded with a call to ValidateGC. Or maybe I should rtfm. -- Dale Luck GfxBase/Boing, Inc. {uunet!cbmvax|pyramid}!amiga!boing!dale
keith@EXPO.LCS.MIT.EDU (04/26/89)
You are required to *always* call ValidateGC if the serial number in the GC doesn't match the serial number for the drawable. You must also *always* use ChangeGC to modify elements of the GC; otherwise any extension which adds an interest to the GC will not see the changes. ChangeGC always makes the serial number in the GC different from any drawable; when the next drawing operation checks the serial numbers they won't match and ValidateGC will be called. Some of the mi code plays fast and loose with these rules, please don't assume that it is always correct (some of it was written before the rules were well specified, some was written by careless people).