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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

2662.0. "Image and Pixmap question" by HKOVC::TERENCE (From Middlesex, UWO) Thu Apr 26 1990 00:35

    Among the following 3 methods
    
    1) XCreateImage and then XPutImage into a window
    2) XCreateImage, XPutImage into a pixmap, and then XCopyArea into a
       window
    3) XCreatePixmapFromBitmapData and then XCopyArea into a window
    
    Which one is the fastest in drawing a picture?
    Any trade off?
    
    Thanx in advance
    
    -Terry

T.R	Title	User	Personal Name	Date	Lines
2662.1		GILROY::klee	Ken Lee	`Thu Apr 26 1990 20:06`	5
	1) and 3) are the same thing. 2) should be slower since there's an extra protocol request and extra copy in the server, but this also keeps a copy for later use, if desired. Ken
2662.2		DECWIN::FISHER	Prune Juice: A Warrior's Drink!	`Mon Apr 30 1990 15:53`	3
	re .1: I think you mean 2 and 3 are the same. Burns
2662.3		GILROY::klee		`Tue May 01 1990 14:01`	2
	Yes, you're right. XCreatePixmapFromBitmapData creates a pixmap and an image, then puts the image in the pixmap.