task7 initial commit

1 files changed, 120 insertions, 0 deletions

diff --git a/7_2/src/drawable.c b/7_2/src/drawable.c
new file mode 100644
index 0000000..33e7290
--- /dev/null
+++ b/7_2/src/drawable.c
@@ -0,0 +1,120 @@
+#include "drawable.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <assert.h>
+#include <X11/X.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+static struct {
+	enum {CTX_NO, CTX_INIT, CTX_FAIL} init;
+	Display *d;
+	Window r, w;
+	int s;
+	GC gctx;
+	XVisualInfo v;
+	XImage *i;
+	int* data;
+} X11 = { .init=CTX_NO };
+
+struct drawable drawable_plaintxt(long width, long height) {
+	struct drawable ret;
+	// with, height +1 because inclusive
+	drawable_init(&ret, put_plaintxt, show_plaintxt, width + 1, height + 1, sizeof (char));
+	memset(ret.data, 0, height*width*1);
+	return ret;
+}
+struct drawable drawable_X11(long width, long height) {
+	struct drawable ret;
+	drawable_init(&ret, put_X11, show_X11, width, height, sizeof (int));
+	int* data = ret.data;
+	for (size_t i = 0; i < width*height; ++i)
+		data[i] = 0x00FFFFFF;
+	return ret;
+}
+
+void drawable_init(struct drawable* self, 
+		   void(*put_f)(struct drawable *, long, long), 
+		   void(*show_f)(const struct drawable *), 
+		   long width, 
+		   long height, 
+		   long pix_s)
+{
+	self->x = width;
+	self->y = height;
+	self->pix_s = pix_s;
+	self->data = malloc(height*width*pix_s);
+	self->put = put_f;
+	self->show = show_f;
+}
+
+void drawable_destroy(struct drawable *self) {
+	free(self->data);
+}
+
+/// plaintxt methods ///
+
+void put_plaintxt(struct drawable *self, long x, long y) {
+	if (x >= self->x || y >= self->y || x < 0 || y < 0) return;
+	char *data = self->data;
+	data[self->x * y + x] = 1;
+}
+
+void show_plaintxt(const struct drawable *self) {
+	char map[2] = {SPACE_CHR, FILL_CHR};
+	for (int i = 0; i < self->y; ++i) {
+		for (int j = 0; j < self->x; ++j) {
+			char *d = self->data;
+			putchar(map[d[i*self->x + j]]);
+		}
+		putchar('\n');
+	}
+}
+
+
+/// X11 from now on ///
+
+static void init_X11(const struct drawable *self) {
+	X11.d = XOpenDisplay(NULL);
+	if (X11.d == NULL) {
+		X11.init = CTX_FAIL;
+		return;
+	}
+	X11.s = DefaultScreen(X11.d);
+	X11.r = RootWindow(X11.d, X11.s);
+	X11.gctx = DefaultGC(X11.d, X11.s);
+	Window w = XCreateSimpleWindow(X11.d, X11.r, 0, 0, self->x, self->y, 0, 0, 0x00FFFFFF);
+	if (!XMatchVisualInfo(X11.d, X11.s, 24, TrueColor, &X11.v)) {
+		XDestroyWindow(X11.d, X11.w);
+		XCloseDisplay(X11.d);
+		X11.init = CTX_FAIL;
+		return;
+	};
+	XMapWindow(X11.d, X11.w);
+	XSelectInput(X11.d, X11.w, ExposureMask);
+	X11.data = malloc(self->x * self->y * sizeof (int));
+	X11.i = XCreateImage(X11.d, X11.v.visual, X11.v.depth, ZPixmap, 0, (void*)X11.data, self->x, self->y, 8*sizeof (int), 0);
+}
+
+void put_X11(struct drawable *self, long x, long y) {
+	if (x >= self->x || y >= self->y || x < 0 || y < 0) return;
+	int *data = self->data;
+	data[self->x * y + x] = 0x00000000;
+}
+
+void show_X11(const struct drawable *self) {
+start:
+	switch (X11.init) {
+	case CTX_NO: init_X11(self); goto start;
+	case CTX_INIT: break;
+	case CTX_FAIL: 
+		fprintf(stderr, "Error: Could not initialize Xlib\n");
+		return;
+	}
+	XEvent e = {};
+	XNextEvent(X11.d, &e);
+	XPutImage(X11.d, X11.w, X11.gctx, X11.i, 0, 0, 0, 0, self->x, self->y);
+}
+