From: David Gow <david@ingeniumdigital.com>
Date: Tue, 5 Aug 2014 13:48:59 +0000 (+0800)
Subject: Don't try to unmap buffers which aren't mapped.
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=59c3413bc2bd0e6a1ddbf4e67d9d7295de10f65c;p=ipdf%2Fcode.git

Don't try to unmap buffers which aren't mapped.

Fixes the GL_INAVLID_OPERATION that snuck in: this would occur
when calling GraphicsBuffer::Resize() on an unmapped, non-invalidated buffer.
---

diff --git a/src/graphicsbuffer.cpp b/src/graphicsbuffer.cpp
index 712caf8..d3911db 100644
--- a/src/graphicsbuffer.cpp
+++ b/src/graphicsbuffer.cpp
@@ -185,6 +185,10 @@ void* GraphicsBuffer::MapRange(int offset, int length, bool read, bool write, bo
 void GraphicsBuffer::UnMap()
 {
 	GLenum target = BufferTypeToGLType(m_buffer_type);
+	
+	// If we're not mapped, unmapping is a no-op.
+	if (!m_map_pointer)
+		return;
 
 	if (m_faking_map)
 	{