From b0358c698acce656e534f30dbef1a793101138a2 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Mon, 20 Feb 2006 20:06:26 +0000
Subject: [PATCH] From Eric Sokolowsky, "There was a problem with the PNG
 plugin when it encounters an image that is less than 8 bits per pixel (this
 can happen with greyscale or paletted images). It was a pretty simple problem
 to fix."

---
 src/osgPlugins/png/ReaderWriterPNG.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/osgPlugins/png/ReaderWriterPNG.cpp b/src/osgPlugins/png/ReaderWriterPNG.cpp
index a21e84169..ecf76b981 100644
--- a/src/osgPlugins/png/ReaderWriterPNG.cpp
+++ b/src/osgPlugins/png/ReaderWriterPNG.cpp
@@ -152,7 +152,7 @@ class ReaderWriterPNG : public osgDB::ReaderWriter
             png_read_end(png, endinfo);
 
             GLenum pixelFormat = 0;
-            GLenum dataType = depth==8?GL_UNSIGNED_BYTE:GL_UNSIGNED_SHORT;
+            GLenum dataType = depth<=8?GL_UNSIGNED_BYTE:GL_UNSIGNED_SHORT;
             switch(color)
             {
               case(PNG_SOLID): pixelFormat = GL_LUMINANCE; break;