Add initial content

1 files changed, 137 insertions, 0 deletions

diff --git a/c/menu/screensaver.c b/c/menu/screensaver.c
new file mode 100644
index 0000000..70e1647
--- /dev/null
+++ b/c/menu/screensaver.c
@@ -0,0 +1,137 @@
+/* Menu Thing for RVController - Screensaver
+ * A product of Advanced Mesecons Devices, a Cheapie Systems company
+ * This is free and unencumbered software released into the public domain.
+ * See http://unlicense.org/ for more information */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "rvcontroller-ecalls.h"
+
+char screensaverbuf[] = "\n                    \n                    \n                    \n                    \n                    \n                    ";
+
+int strlen(char *string) {
+	int i;
+	for (i = 0;string[i] != 0;i++) {}
+	return i;
+}
+
+void screensaverWriteText(char *text, int column, int row, bool erase) {
+	int textlen = strlen(text);
+	if (column < 0) {
+		// Cut the left side off of the text and change the start position to the left side of the screen
+		text = text + (0 - column);
+		textlen = textlen + column;
+		column = 0;
+	} else if (column + textlen > 19) {
+		// Cut the right side off of the text
+		textlen = 20 - column;
+	}
+	for (int i=0;i < textlen;i++) {
+		if (erase) {
+			screensaverbuf[(row*21)+column+i+1] = 0x20;
+		} else {
+			screensaverbuf[(row*21)+column+i+1] = text[i];
+		}
+	}
+}
+
+void doMarquee(void) {
+	char text[] = "RVController ";
+	int col = 19;
+	int row = randomint(0,5);
+	console_clearbuffer();
+	while (console_readchar() == 0) {
+		col--;
+		if (col < (0 - strlen(text))) {
+			col = 20;
+			row = randomint(0,5);
+		}
+		screensaverWriteText(text,col,row,false);
+		printstr(screensaverbuf);
+	}
+	screensaverWriteText(text,col,row,true);
+}
+
+void doBouncingText(void) {
+	char text[] = "RVController";
+	int col = 0;
+	int row = 0;
+	int xdir = 1;
+	int ydir = 1;
+	console_clearbuffer();
+	while (console_readchar() == 0) {
+		screensaverWriteText(text,col,row,true);
+		col = col + xdir;
+		row = row + ydir;
+		if (col <= 0) { xdir = 1; }
+		if (col >= (19 - strlen(text))) { xdir = -1; }
+		if (row <= 0) { ydir = 1; }
+		if (row >= 5) { ydir = -1; }
+		screensaverWriteText(text,col,row,false);
+		printstr(screensaverbuf);
+	}
+	screensaverWriteText(text,col,row,true);
+}
+
+void doMatrix(void) {
+	int row[] = {-8,-4,-1,-5,-2}; // "Random" positions off the top of the screen to give "random" start delays
+	int col[] = {1,18,2,12,9};
+	int len[] = {3,4,5,6,7};
+	char textscratch[] = " ";
+	console_clearbuffer();
+	while (console_readchar() == 0) {
+		for (int i=0;i<=4;i++) {
+			row[i]++;
+			textscratch[0] = randomint(0x21,0x7a);
+			if (row[i] <= 5 && row[i] >= 0) {
+				screensaverWriteText(textscratch,col[i],row[i],false);
+			}
+			if ((row[i] - len[i]) <= 5 && (row[i] - len[i]) >= 0) {
+				screensaverWriteText(textscratch,col[i],(row[i] - len[i]),true);
+			} else if ((row[i] - len[i]) > 5 && randomint(0,1) == 1) {
+				row[i] = 0 - randomint(1,3);
+				col[i] = randomint(0,19);
+				len[i] = randomint(2,8);
+			}
+		}
+		printstr(screensaverbuf);
+	}
+	for (int i=0;i <= 5;i++) {
+		screensaverWriteText("                    ",0,i,true);
+	}
+}
+
+void runScreensaver(void) {
+	char inputbuf[9];
+	bool quit = false;
+	while (!quit) {
+		printstr("\n\n\n\n\n\n\n");
+		printstr("SCREENSAVER\n");
+		printstr("1: Marquee\n");
+		printstr("2: Bouncing Text\n");
+		printstr("3: Matrix\n");
+		printstr("\n");
+		printstr("0: Exit");
+		readstr(inputbuf,2);
+		switch (inputbuf[0]) {
+			case '0':
+				quit = true;
+				break;
+			case '1':
+				doMarquee();
+				quit = true;
+				break;
+			case '2':
+				doBouncingText();
+				quit = true;
+				break;
+			case '3':
+				doMatrix();
+				quit = true;
+				break;
+			default:
+				printstr("\nInvalid option\n\nPress any key\n\n\n");
+				readstr(inputbuf,1);
+		}
+	}
+}