gl_putboxpart(3) Svgalib User Manual gl_putboxpart(3)NAME
gl_putboxpart - copy a partial pixmap to a rectangular area
SYNOPSIS
#include <vgagl.h>
void gl_putboxpart(int x, int y, int w, int h , int bw, int bh, void *dp , int xo, int yo);
DESCRIPTION
Copy the contents of a memory buffer dp to a rectangular bitmap at position (x, y) with size (w, h).
However, only a part of size (bw, bh) starting at offset (xo, yo) in the pixmap is copied.
Pixmaps are in row-major order. The source pixmap memory has the size w * h * BYTESPERPIXEL.
SEE ALSO svgalib(7), vgagl(7), svgalib.conf(5), threedkit(7), testgl(1), gl_compileboxmask(3), gl_compiledboxmasksize(3), gl_copybox(3), gl_copy-
boxfromcontext(3), gl_copyboxtocontext(3), gl_fillbox(3), gl_getbox(3), gl_putbox(3), gl_putboxmask(3), gl_putboxmaskcompiled(3), gl_scale-
box(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_putboxpart(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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