From 1db72d6b180b40f204ec0781677d8761f52ea6b5 Mon Sep 17 00:00:00 2001
From: "Adam D. Ruppe" <destructionator@gmail.com>
Date: Wed, 19 Apr 2017 22:07:48 -0400
Subject: [PATCH] fix for <256 color index image saving

---
 png.d | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/png.d b/png.d
index 7d15100..9123704 100644
--- a/png.d
+++ b/png.d
@@ -267,7 +267,7 @@ PNG* pngFromImage(IndexedImage i) {
 		addImageDatastreamToPng(i.data, png);
 	} else {
 		// gotta convert it
-		ubyte[] datastream = new ubyte[i.width * i.height * 8 / h.depth]; // FIXME?
+		ubyte[] datastream = new ubyte[i.width * i.height * h.depth / 8]; // FIXME?
 		int shift = 0;
 
 		switch(h.depth) {
@@ -629,7 +629,7 @@ void addImageDatastreamToPng(const(ubyte)[] data, PNG* png) {
 
 	auto bytesPerLine = h.width * 4;
 	if(h.type == 3)
-		bytesPerLine = h.width * 8 /  h.depth;
+		bytesPerLine = h.width * h.depth / 8;
 	Chunk dat;
 	dat.type = ['I', 'D', 'A', 'T'];
 	int pos = 0;