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#include <stdio.h>
#include <stdlib.h>
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
/* ---- Global ---- */
int scr;
unsigned int DIMw, DIMh, DIMp;
Display *dsp;
Window fen;
XEvent ev;
GC cg;
/* ---- Prototypage ---- */
void openWindow(void);
void closeWindow(void);
unsigned long int couleurDef(short int, short int, short int);
void encre(unsigned long int);
void fond(unsigned long int);
void rectangleFull(int, int, int, int);
void eventManager(void);
/* ---- Main ---- */
int main(void)
{
int windowW, windowH;
openWindow();
windowW = DIMw / 2;
windowH = DIMh / 2;
XStoreName(dsp, fen, "Utilisez (q) pour quiter");
encre(couleurDef(0, 0, 255));
rectangleFull(windowW / 4, windowH / 4, windowW / 2, windowH / 2);
eventManager();
return 0;
}
/* ---- Fonctions ---- */
/* --- Fenetre --- */
void openWindow(void)
{
unsigned long cw;
XGCValues vg;
XSetWindowAttributes att;
if((dsp = XOpenDisplay(NULL)) == NULL)
{
fprintf(stderr, "Impossible d'accéder au périphérique d'affichage %s.\n", getenv("DISPLAY"));
exit(1);
}
scr = DefaultScreen(dsp);
DIMw = XDisplayWidth(dsp, scr);
DIMh = XDisplayHeight(dsp, scr);
DIMp = XDisplayPlanes(dsp, scr);
cw = CWBackPixel | CWBorderPixel;
att.border_pixel = WhitePixel(dsp, scr);
att.background_pixel = BlackPixel(dsp, scr);
fen = XCreateWindow(dsp, RootWindow(dsp, scr), 0, 0,
DIMw / 2, DIMh / 2, 4, DefaultDepth(dsp, scr), InputOutput, NULL, cw, &att);
XSelectInput(dsp, fen, KeyPressMask);
cg = XCreateGC(dsp, fen, 0, &vg);
XMapWindow(dsp, fen);
}
void closeWindow(void)
{
XFreeGC(dsp, cg);
XDestroyWindow(dsp, fen);
XCloseDisplay(dsp);
printf("A+ mon pote !\n");
}
/* --- Couleurs --- */
unsigned long int couleurDef(short int r, short int v, short int b)
{
return (r << 16 | v << 8 | b);
}
/* --- Decos/Formes --- */
void encre(unsigned long int col)
{
XSetForeground(dsp, cg, col);
}
void fond(unsigned long int col)
{
XSetWindowBackground(dsp, fen, col);
XClearWindow(dsp, fen);
}
void rectangleFull(int x, int y, int w, int h)
{
XFillRectangle(dsp, fen, cg, x, y, w, h);
}
/* --- Actions --- */
void eventManager(void)
{
int close = 0;
while(!close)
{
XNextEvent(dsp, &ev);
if (ev.type == KeyPress)
{
char buffer;
int bufsize=1;
XLookupString(&(ev.xkey), &buffer, bufsize, NULL, NULL);
switch(buffer) {
case 'q':
close = 1;
closeWindow();
break;
case 'p':
break;
case 'm':
break;
}
}
}
} |
[Xlib] Tester le fonctionnement d'une fonction de dessin
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