xlib_playground

commit 60689a306dbcf75ea03418b7893fcf0933ff01d4
parent 986a8323199e0f652863cd109daa6a5f032ae1b8
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Thu, 15 Dec 2022 10:30:41 +0900

disable pixmap

Diffstat:
M
main.c
 | 
68
++++++++++++++++++++++++++++++++++++++++++++++----------------------

1 file changed, 46 insertions(+), 22 deletions(-)
diff --git a/main.c b/main.c
@@ -6,23 +6,28 @@
 
 #include "obj.h"
 
+/* macros */
 #define INIT_WIDTH 800
 #define INIT_HEIGHT 600
 #define FPS 60
-#define RECT_WIDTH 300
-#define RECT_HEIGHT 300
 
-int
-main(void)
-{
-	Display     *display;
-	Window       window;
-	unsigned int win_width = INIT_WIDTH, win_height = INIT_HEIGHT;
-	GC           gc;
-	Pixmap       pm;
-	Atom         wm_delete_window;
-	Obj          square = {1, 1, 100, 100, 20, 20};
+/* variables */
+Display     *display;
+Window       window;
+unsigned int win_width = INIT_WIDTH, win_height = INIT_HEIGHT;
+GC           gc;
+Atom         wm_delete_window;
+Obj          square = {1, 1, 100, 100, 20, 20};
+int          quit = 0;
 
+/* function prototypes */
+void setup(void);
+void cleanup(void);
+
+
+void
+setup(void)
+{
     if((display = XOpenDisplay(NULL)) == NULL){
         fprintf(stderr, "ERROR: could not open display\n");
         exit(1);
@@ -36,8 +41,6 @@ main(void)
 						0);
 	XStoreName(display, window, "UNKO");
 	gc = XCreateGC(display, window, 0, NULL);
-	pm = XCreatePixmap(display, window, win_width, win_height,
-						DefaultDepth(display, DefaultScreen(display)));
 
     wm_delete_window = XInternAtom(display, "WM_DELETE_WINDOW", False);
     XSetWMProtocols(display, window, &wm_delete_window, 1);
@@ -45,8 +48,19 @@ main(void)
     XSelectInput(display, window, KeyPressMask);
 
     XMapWindow(display, window);
+}
+
+void
+cleanup(void)
+{
+    XCloseDisplay(display);
+}
+
+int
+main(void)
+{
+	setup();
 
-    int quit = 0;
     while (!quit) {
         while (XPending(display) > 0) {
             XEvent event = {0};
@@ -57,6 +71,18 @@ main(void)
                 case 'q':
                     quit = 1;
                     break;
+				case 'd':
+					square.vx += 10;
+					break;
+				case 'a':
+					square.vx -= 10;
+					break;
+				case 'w':
+					square.vy -= 10;
+					break;
+				case 's':
+					square.vy += 10;
+					break;
                 default:
 					break;
                 }
@@ -69,15 +95,12 @@ main(void)
             }
         }
 
-		XSetForeground(display, gc, 0);
-		XFillRectangle(display, pm, gc, 0, 0, win_width, win_height);
 
 		XWindowAttributes window_attributes_return;
 		XGetWindowAttributes(display, window, &window_attributes_return);
 		win_width = window_attributes_return.width;
 		win_height = window_attributes_return.height;
 
-
 		if(square.px <= 0){
 			square.px = 0;
 			square.vx *= -1;
@@ -96,15 +119,16 @@ main(void)
 		}
 		obj_accel(&square, 0, 9.8);
 		obj_next_tick(&square, 1.0/FPS);
-		XSetForeground(display, gc, 0x00FF00);
-		XFillRectangle(display, pm, gc, square.px, square.py, square.width, square.height);
 
-		XCopyArea(display, pm, window, gc, 0, 0, win_width, win_height, 0, 0);
+
+		XClearArea(display, window, 0, 0, win_width, win_height, False);
+		XSetForeground(display, gc, 0x00FF00);
+		XFillRectangle(display, window, gc, square.px, square.py, square.width, square.height);
 
 		struct timespec timetosleep = {0, 1000*1000*1000/FPS}; //not accurate
         nanosleep(&timetosleep, NULL);
     }
 
-    XCloseDisplay(display);
+	cleanup();
     return 0;
 }