From f7b7cf9e80200cade938d47527e39034c75b9b6d Mon Sep 17 00:00:00 2001
From: fishsoupisgood <github@madingley.org>
Date: Thu, 18 Jun 2020 10:07:21 +0100
Subject: rudimentary clipping

---
 app/oled.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'app/oled.c')

diff --git a/app/oled.c b/app/oled.c
index e5edfed..63a47fc 100644
--- a/app/oled.c
+++ b/app/oled.c
@@ -148,6 +148,17 @@ oled_blit_strip (uint8_t *vram, int x, int xe, uint8_t mask, int shift,
 {
   uint8_t r, s;
 
+  while (x < 0) {
+    x++;
+    src++;
+  };
+
+  if (xe < 0) xe = 0;
+
+  if (x > SSD1306_VRAM_SIZE) xe = SSD1306_VRAM_SIZE;
+
+  if (xe > SSD1306_VRAM_SIZE) xe = SSD1306_VRAM_SIZE;
+
 
   if (shift > 0) {
     for (x++; x <= xe; ++x) {
-- 
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