From 932455ccd3113c024e12f5e897e371524b403dbd Mon Sep 17 00:00:00 2001
From: Stefan `Sec` Zehl <sec@42.org>
Date: Sun, 17 Jul 2011 12:14:49 +0200
Subject: [PATCH] Coordinate safe SetPixel. I will need it.

---
 firmware/lcd/display.c | 7 +++++++
 firmware/lcd/display.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/firmware/lcd/display.c b/firmware/lcd/display.c
index c56c7a2..64e7ea0 100644
--- a/firmware/lcd/display.c
+++ b/firmware/lcd/display.c
@@ -100,7 +100,14 @@ void lcdFill(char f){
     }
 };
 
+void lcdSafeSetPixel(char x, char y, bool f){
+    if (x>=0 && x<=RESX && y>=0 && y <= RESY)
+        lcdSetPixel(x, y, f);
+}
+
 void lcdSetPixel(char x, char y, bool f){
+    if (x<0 || x> RESX || y<0 || y > RESY)
+        return;
     char y_byte = (RESY-(y+1)) / 8;
     char y_off = (RESY-(y+1)) % 8;
     char byte = lcdBuffer[y_byte*RESX+(RESX-(x+1))];
diff --git a/firmware/lcd/display.h b/firmware/lcd/display.h
index 0690621..91f977e 100644
--- a/firmware/lcd/display.h
+++ b/firmware/lcd/display.h
@@ -26,6 +26,7 @@ void lcdDisplay(uint32_t shift);
 void lcdInvert(void);
 void lcdToggleFlag(int flag);
 void lcdSetPixel(char x, char y, bool f);
+void lcdSafeSetPixel(char x, char y, bool f);
 bool lcdGetPixel(char x, char y);
 
 #endif