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From: Tom.Emerson@UVM.EDU (Tom Emerson)
Newsgroups: comp.windows.interviews
Subject: Re: How to check that Bitmap is valid?
Message-ID: <9104151724.AA18080@UVM.EDU>
Date: 15 Apr 91 17:24:29 GMT
References: <9104121357.AA03653@control.lth.se>
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>>>>> On Fri, 12 Apr 91 15:57:09 +0200, Dag Bruck <dag@control.lth.se> said:

Dag> Environment: InterViews 2.6 with patches, Sun-4, SunOS 4.1.1,
Dag> Cfront 2.1.

Dag> I create bitmap objects using the constructor

Dag> 	Bitmap(const char* filename);

Dag> However, if the given filename doesn't refer to a valid bitmap file,
Dag> I get some strange X protocol error later on.

Dag> QUESTION: How do I check that the created Bitmap object really refers
Dag> to a valid bitmap?

The way I do it is to #include the bitmap sources and then use the
bitmap(void* data, int width, int height, int x0, int y0) with the
information supplied with the bitmap.

Thomas


--
                                     Thomas Emerson
________________   Student Systems Programmer - EMBA Computer Facility
 /  /_) /_  /_                    University of Vermont
/  / \ /__ /__                     tree@newton.uvm.edu 
     "It's a pity the universe doesn't use segmented architecture
		       with a protected mode."           --- Rick Cook