From: Dr. Norbert R. Nowaczyk (nowa@gfz-potsdam.de)
Date: Thu 05 Apr 2001 - 16:19:52 IST
Dear Ladies and Gentlemen, I have started to port C graphics programs from MSDOS using Borland Turbo C to Linux using SVGAlib. As far as I recognized (as a beginner), there is no way to create a feature like a vertical/horizontal line cursor similar to the one on an oscilloscope. With Turbo C I used the 'setwritemode' function which specifies whether a pixel or a line is plotted with COPY_PUT or XOR operation. When using XOR, one draws a line that would disappear when drawing it again. By this way I could emulate a cursor that was moved by the arrow keys in order to scan a measured curve which is displayed on the screen and so on... Is there any (hidden) possiblity in SVGAlib that I can use to do the same under Linux and SVGAlib? It should be, because there is a mouse cursor that obviously does similar things.. best regards, Norbert Nowaczyk ---------- Dr. Norbert R. Nowaczyk GeoForschungsZentrum Potsdam Laboratory for Paleo- and Rock Magnetism Telegrafenberg Haus C D-14473 Potsdam Germany Tel.: +49 331 288 1369 (Office) 1362 (Lab) 1302 (Fax) e-mail: nowa@gfz-potsdam.de ------------------------------------------------------------------ Unsubscribe: To: listbot@svgalib.org Body: unsubscribe linux-svgalib
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