main.c
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#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include <stdio.h>
#include <stdlib.h>
#define AWESOME 7
Display *dis;
int screen;
Window win;
GC gc;
int width=320;
int height=240;
int i=0;
void init_x();
void close_x();
void redraw();
int main ()
{
XEvent event; /* the XEvent declaration !!! */
KeySym key; /* a dealie-bob to handle KeyPress Events */
char text[255]; /* a char buffer for KeyPress Events */
XColor col;
int initOffsetBMP;
init_x();
printf("Patte de canard\n");
Colormap cmap = DefaultColormap(dis, DefaultScreen(dis));
printf("?\n");
FILE* home = NULL;
char buffer[4];
home = fopen("home.bmp", "r");
if(home == NULL)
return 0;
fseek(home, 0x0A, SEEK_SET);
buffer[0] = getc(home);
buffer[1] = getc(home);
buffer[2] = getc(home);
buffer[3] = getc(home);
printf("Pixel array offset %02x %02x %02x %02x\n", buffer[0], buffer[1], buffer[2], buffer[3]);
initOffsetBMP = buffer[0] + (buffer[1] >> 8) + (buffer[2] >> 16) + (buffer[3] >> 24);
fseek(home, 0x12, SEEK_SET);
buffer[0] = getc(home);
buffer[1] = getc(home);
buffer[2] = getc(home);
buffer[3] = getc(home);
printf("Width %02x %02x %02x %02x\n", buffer[0], buffer[1], buffer[2], buffer[3]);
//fseek(home, 0x12, SEEK_SET);
buffer[0] = getc(home);
buffer[1] = getc(home);
buffer[2] = getc(home);
buffer[3] = getc(home);
printf("Height %02x %02x %02x %02x\n", buffer[0], buffer[1], buffer[2], buffer[3]);
fseek(home, 0x1C, SEEK_SET);
buffer[0] = getc(home);
buffer[1] = getc(home);
printf("Bits Per Pixel %02x %02x\n", buffer[0], buffer[1]);
if(buffer[1] != 0 || buffer[0] != 0x18)
{
printf("Could not read BMP\n");
return 1;
}
fseek(home, initOffsetBMP, SEEK_SET);
while(1)
{
XNextEvent(dis, &event);
if (event.type==Expose && event.xexpose.count==0)
redraw();
if (event.type==KeyPress&& XLookupString(&event.xkey,text,255,&key,0)==1)
{
if (text[0]=='q')
close_x();
printf("You pressed the %c key!\n",text[0]);
}
if (event.type==ButtonPress)
{
//int x=event.xbutton.x,
//y=event.xbutton.y;
//strcpy(text,"X is FUN!");
//XSetForeground(dis,gc,rand()%event.xbutton.x%255);
//XDrawString(dis,win,gc,x,y, text, strlen(text));
buffer[0] = getc(home);
buffer[1] = getc(home);
buffer[2] = getc(home);
int j;
for(j=0; j<AWESOME; j++)
{
col.red = buffer[2];
col.green = buffer[1];
col.blue = buffer[0];
if(XAllocColor(dis, cmap, &col) == 0)
printf("Failed to allocate color\n");
if(XSetForeground(dis, gc, col.pixel) == 0)
printf("Failed to set foreground\n");
if(XDrawPoint(dis,win,gc,i%width,i/height) == 0)
printf("Failed to draw point\n");
buffer[0] = getc(home);
buffer[1] = getc(home);
buffer[2] = getc(home);
printf("X %03d Y %03d R %02x G %02x B %02x\n", i%width, i/height, buffer[0], buffer[1], buffer[2]);
i++;
}
}
}
printf("End of display\n");
return 0;
}
void init_x() {
unsigned long black,white;
dis=XOpenDisplay((char *)0);
screen=DefaultScreen(dis);
black=BlackPixel(dis,screen),
white=WhitePixel(dis, screen);
win=XCreateSimpleWindow(dis,DefaultRootWindow(dis),0,0,width,height, 0,black, white);
XSetStandardProperties(dis,win,"Howdy","Hi",None,NULL,0,NULL);
XSelectInput(dis, win, ExposureMask|ButtonPressMask|KeyPressMask);
gc=XCreateGC(dis, win, 0,0);
XSetBackground(dis,gc,white);
XSetForeground(dis,gc,black);
XClearWindow(dis, win);
XMapRaised(dis, win);
};
void close_x() {
XFreeGC(dis, gc);
XDestroyWindow(dis,win);
XCloseDisplay(dis);
exit(1);
};
void redraw() {
XClearWindow(dis, win);
};