Various updates

blit.c

@@ -1,29 +1,60 @@
 #include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xcms.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
+
+Display*
+getDisplay() {
+  /* Get a display to use */
+  /* Currently just uses the default display */
+  Display *display = XOpenDisplay(NULL);
+
+  if (display == NULL) {
+    fprintf(stderr, "Could not open the display! :(\n");
+    exit(1);
+  }
+
+  return display;
+}
+
+XColor
+getColor(unsigned short red,
+         unsigned short green,
+         unsigned short blue) {
+  /* Return a new XColor structure */
+  /* Initialize it with RGB */
+  XColor xcolor;
+
+  xcolor.red = red;
+  xcolor.green = green;
+  xcolor.blue = blue;
+
+  xcolor.flags = DoRed | DoGreen | DoBlue;
+
+  return xcolor;
+}
 
 int
 main(void) {
-  Display *display;
   Window window;
   XEvent event;
 
   const char *msg = "Hello, world!\n";
 
-  int screen;
+  XColor xcolor = getColor(0xffff, 0xffff, 0xffff);
 
-  // Opens the current display
-  display = XOpenDisplay(NULL);
+  Display *display = getDisplay();
 
-  if (display == NULL) {
-    fprintf(stderr, "Could not open the display! :(\n");
-    exit(1);
-  }
+  int screen = DefaultScreen(display);
 
-  printf("%p\n", display);
+  GC gc = XDefaultGC(display, screen);
 
-  screen = DefaultScreen(display);
+  XAllocColor(display,
+              XDefaultColormap(display, screen),
+              &xcolor);
 
   window = XCreateSimpleWindow(display,
                                RootWindow(display, screen),
@@ -32,8 +63,8 @@ main(void) {
                                100,
                                100,
                                1,
-                               BlackPixel(display, screen),
-                               WhitePixel(display, screen));
+                               WhitePixel(display, screen),
+                               xcolor.pixel);
 
   printf("%p\n", window);
 
@@ -43,6 +74,23 @@ main(void) {
 
   XMapWindow(display, window);
 
+  int depth = DefaultDepth(display, DefaultScreen(display));
+
+  Pixmap pixmap;
+  pixmap = XCreatePixmap(display,
+                         window,
+                         100,
+                         100,
+                         depth);
+
+  int factor = 0;
+
+  struct timespec req;
+  struct timespec rem;
+
+  req.tv_sec = 0;
+  req.tv_nsec = 20000000;
+
   while (1) {
     /* Event loop that handles events from the X server's event queue */
     /* Will actually block if there are no events */
@@ -50,27 +98,41 @@ main(void) {
     XNextEvent(display, &event);
     if (event.type == Expose) {
 
-      XFillRectangle(display,
-                     window,
-                     DefaultGC(display, screen),
-                     20,
-                     20,
-                     10,
-                     10);
-
-      XDrawString(display,
-                  window,
-                  DefaultGC(display, screen),
-                  10,
-                  50,
-                  msg,
-                  strlen(msg));
+      XColor boxcolor = getColor(32000, 0, 32000);
+
+      XAllocColor(display,
+                  XDefaultColormap(display, screen),
+                  &boxcolor);
+
+      XSetForeground(display, gc, boxcolor.pixel);
+
     }
 
     if (event.type == KeyPress) {
       break;
     }
 
+    for(int x = 0; x < 100; x++) {
+      for(int y = 0; y < 100; y++) {
+        XDrawPoint(display, pixmap, gc, x, y);
+      }
+    }
+
+    factor++;
+
+    XCopyArea(display,
+              pixmap,
+              window,
+              gc,
+              0,
+              0,
+              100,
+              100,
+              factor,
+              factor);
+
+    nanosleep(&req, &rem);
+
   }
 
   XCloseDisplay(display);