From 61285392fa02c1acef39f75342d6dab20b672036 Mon Sep 17 00:00:00 2001
From: knolax <1339802534.kk@gmail.com>
Date: Wed, 21 Feb 2018 21:43:52 -0500
Subject: Initial Commit, braille graphics have been implemented.

---
 Makefile |   2 +
 wsim     | Bin 0 -> 8736 bytes
 wsim.c   | 145 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 147 insertions(+)
 create mode 100644 Makefile
 create mode 100755 wsim
 create mode 100644 wsim.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..2198cda
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,2 @@
+main:
+	gcc wsim.c -o wsim
diff --git a/wsim b/wsim
new file mode 100755
index 0000000..21147a6
Binary files /dev/null and b/wsim differ
diff --git a/wsim.c b/wsim.c
new file mode 100644
index 0000000..b369b9d
--- /dev/null
+++ b/wsim.c
@@ -0,0 +1,145 @@
+#include<stdio.h>
+#include<string.h>
+#include<stdint.h>
+/* map holding the pixels for a 200x200 pixel imagebuffer, [x][y] 
+ * bits are in braille order within each byte
+ */
+uint8_t map[100][50];
+/* takes char storing the on/off positions of 8 points, in braille encoding
+ * order, and prints the corresponding braille char
+ */
+
+/* global state bit switch */
+uint8_t state = 1;
+#define STATE_LOOP 0x01
+void printbraille(uint8_t points) {
+	/* outputs braille characters, the encoding for braile is:
+	 * 1 4
+	 * 2 5
+	 * 3 6
+	 * 7 8
+	 * with the block being in U+2800 to U+28FF
+	 * in utf8 that's encoded
+	 * 1110xxxx 10xxxxxx 10xxxxxx
+	 * [1110](0010) [10](1000)87 [10]654321
+	 */
+	printf("%c%c%c", 
+		0b11100010, 
+		0b10100000 | (points >> 6),
+		0b10000000 | (points & 0b00111111));
+}
+/* prints the map, clears output before aswell*/
+void printmap() {
+	uint8_t xi = 0;
+	uint8_t yi = 0;
+	/*terminal escape code to move the cursor to beginning of screen or 1,1*/
+	printf("\033[1;1H");
+	while (yi < 50) {
+		xi = 0;
+		while (xi < 100) {
+			printbraille(map[xi][yi]);
+			xi++;
+		}
+		printf("\n");
+		yi++;
+	}
+}
+/* sets a pixel in the map, converts x,y coordinates to braille order
+ * if set is 0, then set it to 0
+ * if 1, set to 1
+ * if > 1, flip
+ * does not throw errors
+ */
+void setpixel(uint8_t x, uint8_t y,uint8_t set) {
+	/* anchor x and y coordinates, eg the index in map*/
+	uint8_t ax;
+	uint8_t ay;
+	/*bitmask in braille order of the byte in mask*/
+	uint8_t shift = 0x01;
+	/* check if out of bounds, since the arguments are unsigned, don't have
+	 * to check below 0, doesn't throw errors
+	 */
+	if ( (x >= 200 ) || (y >= 200) ) {
+		return;
+	}
+	/* integer division rounds down, therefore dividing will always get the
+	 * index
+	 */
+	ax = x/2;
+	ay = y/4;
+	/*
+	 * maps to braille order based off of x and y offsets
+	 * 1 4
+	 * 2 5
+	 * 3 6
+	 * 7 8
+	 */
+	switch(x % 2) {
+		case 0:
+			switch (y % 4) {
+				case 0:
+					shift = shift << 0;
+				break;
+				case 1:
+					shift = shift << 1;
+				break;
+				case 2:
+					shift = shift << 2;
+				break;
+				case 3:
+					shift = shift << 6;
+				break;
+			}
+		break;
+		case 1:
+			switch (y % 4) {
+				case 0:
+					shift = shift << 3;
+				break;
+				case 1:
+					shift = shift << 4;
+				break;
+				case 2:
+					shift = shift << 5;
+				break;
+				case 3:
+					shift = shift << 7;
+				break;
+			}
+		break;
+	}
+	/* sets the bit based on set*/
+	switch (set) {
+		case 0:
+			map[ax][ay] = map[ax][ay] & (~shift);
+		break;
+		case 1:
+			map[ax][ay] = map[ax][ay] | shift;
+		break;
+		default:
+			map[ax][ay] = ((~map[ax][ay]) & shift) | 
+					((~shift) & map[ax][ay]);
+		break;
+	}
+	return;
+}
+int main (int argc, char * argv[]) {
+	/*holds keypress*/
+	char input;
+	/*zeroing map*/
+	memset(map, 0, sizeof(map[0][0]) * 100 * 50);
+	printmap();
+	while (state & STATE_LOOP) {
+		setpixel(0,0,2);
+		printmap();
+		/* checks input*/
+		input = getc(stdin);
+		/*haven't set the terminal to raw mode so will still need
+ 		 * space
+		 */
+		if (input == 'q') {
+			state = state & (~STATE_LOOP);
+		}
+	}
+	return 0;
+}
-- 
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