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ExtraMaus is a tool that shows an additional mouse cursor. Useful for VLC recording. Author: Dodger Tools
#include <stdio.h>
#include <stdlib.h>
#include <X11/Xlib.h>
#include <assert.h>
#include <X11/cursorfont.h>
#include <X11/extensions/shape.h>
// Include the mouse cursor xbm directly
#define mouse_width 12
#define mouse_height 21
static unsigned char mouse_bits[] = {
0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0xff, 0x0f,
0xff, 0x00, 0xff, 0x00, 0xe7, 0x01, 0xe3, 0x01, 0xc1, 0x03, 0xc0, 0x03,
0x80, 0x07, 0x80, 0x07, 0x00, 0x03 };
/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Some ideas taken from oneko-1.2.sakura (http://www.daidouji.com/oneko/)
and shape.c (http://www.edwardrosten.com/code/).
@see http://dodger-tools.sourceforge.net/cms/index.php?id=100000201
@see https://forums.gentoo.org/viewtopic-t-1040822-start-0.html
@see https://unix.stackexchange.com/questions/152435/sharing-your-desktop-with-google-hangouts-dual-monitor-and-gnome-shell
Compile on Fedora:
sudo dnf install libXext-devel libX11-devel
gcc extramaus.c -o extramaus -lX11 -lXext -g
*/
int main(argc, argv) int argc; char *argv[];
{
Display *display;
int screenNr;
Colormap colorMap;
XSetWindowAttributes windowAttributes;
Pixmap mouseCursor;
XColor red, exact_red;
Window mouseWindow, QueryRoot, QueryChild;
int mouseX, mouseY, winX, winY, mouseOldX, mouseOldY;
unsigned int mask;
XSizeHints *s_hints;
XWindowChanges windowChanges;
unsigned long windowMask;
// Open the X11 display and get back a pointer to it
display = XOpenDisplay(NULL);
// Get the screen number
screenNr = DefaultScreen(display);
// Get the color map (ID)
colorMap = DefaultColormap(display, screenNr);
// Stop the program, if display is false (NULL)
assert(display);
// Get the "nearest" color matching the color name "red" and store it in the variable "red"
//XAllocNamedColor(display, colorMap, "red", &red, &exact_red);
XAllocNamedColor(display, colorMap, "white", &red, &exact_red);
// Set the mouse coordinates to invalid values
mouseOldX = -1;
mouseOldY = -1;
// Set some attributes
windowAttributes.background_pixel = red.pixel;
windowAttributes.override_redirect = True;
windowMask = CWBackPixel | CWOverrideRedirect;
// Create the window at position 10, 10, with width and height of the cursor
mouseWindow = XCreateWindow(display, XRootWindow(display, screenNr), 10, 10, mouse_width, mouse_height, 0, DefaultDepth(display, screenNr), InputOutput, CopyFromParent, windowMask, &windowAttributes);
assert(mouseWindow);
// Create a bitmap with the size of the mouse cursor and its bits
mouseCursor = XCreateBitmapFromData(display, mouseWindow, mouse_bits, mouse_width, mouse_height);
// Use the mouse cursor as shape for the mouse window
XShapeCombineMask(display, mouseWindow, ShapeBounding, 0, 0, mouseCursor, ShapeSet);
// Show the mouse window
XMapWindow(display, mouseWindow);
XFlush(display);
// Let it loop forever
while (True)
{
// Get the position of the mouse and store it in the variables mouseX and mouseY
XQueryPointer(display,DefaultRootWindow(display),&QueryRoot, &QueryChild,&mouseX,&mouseY,&winX,&winY,&mask);
// Check, if the mouse was moved since the last time
if ((mouseOldX != mouseX) || (mouseOldY != mouseY))
{
// Change the position of the mouse window to x+1 and y+1. +1 because without the normal mouse wouldn't be able to click on things anymore.
windowChanges.x = mouseX+1;
windowChanges.y = mouseY+1;
XConfigureWindow(display, mouseWindow, CWX | CWY, &windowChanges);
// Store the new mouse coordinates
mouseOldX = mouseX;
mouseOldY = mouseY;
// Update the display
XFlush(display);
}
// Make a pause of 1/100 seconds to save
usleep(10000);
}
}
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