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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

987.0. "XReadBitmap problem" by EPIK::J_JOSEPH (Have you seen Jack in the Green) Tue Jun 20 1989 16:33

I am using the routine XReadBitmapFile to read in an X11 bitmap file.  The 
problem I have shows up when the bitmap is larger than the screen.  In my  case,
I have a bitmap file which is 1280 x 1024, and the screen is 1024 x 864.  The 
call to XReadBitmapFile returns a status of BitmabSuccess, but though I don't 
do anything with the returned pixmap afterwards, I get the following string of 
errors.  As I recall, the max pixmap size one is allowed to create is bounded
by the size of the screen.

BadAlloc - insufficient resources
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadDrawable - parameter not a Pixmap or Window
BadGC - parameter not a GC
BadPixmap - parameter not a Pixmap

The last, presumably, when I destroy the pixmap, which is not set to 0, but I 
have a feeling is just pointing at garbage.

Does anyone know if there is a good way to look at the width, height of the 
bitmap in the file before attempting to read it with XReadBitmapFile.  Or a 
way to get the bitmap into an XImage structure.  I'm looking for a way to 
avoid these errors.

Thanks.

	-Jonathan

T.R Title User Personal
Name Date Lines

987.1 PSW::WINALSKI Careful with that VAX, Eugene Thu Jun 22 1989 19:18 8

T.R	Title	User	Personal Name	Date	Lines
987.1		PSW::WINALSKI	Careful with that VAX, Eugene	`Thu Jun 22 1989 19:18`	8
	You will have to open, read, and parse the bitmap file yourself. There is code to do this in Xfish. Look at file PSW::PSW$DUA1:[WINALSKI.FISH]FISH.C. In particular, look at XCreatePixmapFromBitmapFile. This is a routine that is identical to XCreateBitmapFromFile, except it creates a pixmap of default depth instead of a bitmap. The routine processes a bitmap file "by hand." --PSW

You will have to open, read, and parse the bitmap file yourself.  There is code
to do this in Xfish.  Look at file PSW::PSW$DUA1:[WINALSKI.FISH]FISH.C.  In
particular, look at XCreatePixmapFromBitmapFile.  This is a routine that is
identical to XCreateBitmapFromFile, except it creates a pixmap of default depth
instead of a bitmap.  The routine processes a bitmap file "by hand."

--PSW