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/* 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);
}
}
}
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