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gl_compileboxmask(3) [v7 man page]

gl_compileboxmask(3)						Svgalib User Manual					      gl_compileboxmask(3)

NAME
gl_compileboxmask - compress a masked bitmap SYNOPSIS
#include <vgagl.h> void gl_compileboxmask(int w, int h, void *sdp, void *ddp); DESCRIPTION
Convert the rectangular masked bitmap of size (w, h) at sdp to a compressed format that allows faster drawing, which is stored at ddp. Allocating w * h bytes for the compiled version is usually enough; an upper limit should be (w + 2) * h. Compiled bitmaps are only supported in linear 256 color modes. SEE ALSO
svgalib(7), vgagl(7), svgalib.conf(5), threedkit(7), testgl(1), plane(1), wrapdemo(1), gl_compileboxmask(3), gl_compiledboxmasksize(3), gl_getbox(3), gl_putbox(3), gl_putboxpart(3), gl_putboxmask(3), gl_putboxmaskcompiled(3). AUTHOR
This manual page was edited by Michael Weller <eowmob@exp-math.uni-essen.de>. The exact source of the referenced demo as well as of the original documentation is unknown. It is very likely that both are at least to some extent are due to Harm Hanemaayer <H.Hanemaayer@inter.nl.net>. Occasionally this might be wrong. I hereby asked to be excused by the original author and will happily accept any additions or corrections to this first version of the svgalib manual. Svgalib (>;= 1.2.11) 2 Aug 1997 gl_compileboxmask(3)

Check Out this Related Man Page

vga_flip(3)							Svgalib User Manual						       vga_flip(3)

NAME
vga_flip - toggle between text and graphics mode SYNOPSIS
#include <vga.h> int vga_flip(void); DESCRIPTION
switches between graphics and text mode without destroying the screen contents. This makes it possible for your application to use both text and graphics output. However, This is an old vgalib function. You should really only use it for debugging as it runs extremely unstable because svgalib now does its own virtual console management. If you want to perform a similar action, save the current screen contents with ordinary memory copy operation to the frame buffer or gl_getbox(3), set vga_setmode(TEXT), then call vga_setmode(3) to return to graphics operation and restore the screen contents with memory or gl_putbox(3). One could also use vga_drawscansegment(3) and vga_getscansegment(3) calls. However, avoid any calls to vga_flip() in your applications. The function always returns 0, a fact on which you shouldn't rely. It might be useful if you are debugging one of your svgalib applications though. If your program reaches a breakpoint while in graphics mode, you can switch to text mode with the gdb command print vga_flip() and later restore the graphics screen contents with the same command. It is useful to define the following alias in gdb: define flip <Return> print vga_flip() <Return> end <Return> SEE ALSO
svgalib(7), vgagl(7), libvga.config(5), vga_init(3), vga_setflipchar(3), vga_drawscanline(3), vga_drawscansegment(3), vga_getscanseg- ment(3), gl_getbox(3), gl_putbox(3) AUTHOR
This manual page was edited by Michael Weller <eowmob@exp-math.uni-essen.de>. The exact source of the referenced function as well as of the original documentation is unknown. It is very likely that both are at least to some extent are due to Harm Hanemaayer <H.Hanemaayer@inter.nl.net>. Occasionally this might be wrong. I hereby asked to be excused by the original author and will happily accept any additions or corrections to this first version of the svgalib manual. Svgalib (>;= 1.2.11) 27 July 1997 vga_flip(3)
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