From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 27 Dec 2021 23:05:20 +0000 (+0200)
Subject: Require buffer to have storage for mapping
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=be962824e72a7d5e2946ad4c0e69e01c60da30e8

Require buffer to have storage for mapping
---

diff --git a/source/core/buffer.cpp b/source/core/buffer.cpp
index d5fc29d1..36ac440a 100644
--- a/source/core/buffer.cpp
+++ b/source/core/buffer.cpp
@@ -58,7 +58,7 @@ void Buffer::require_size(size_t req_sz) const
 
 void *Buffer::map()
 {
-	if(!can_map() || mapped)
+	if(size==0 || !can_map() || mapped)
 		throw invalid_operation("Buffer::map");
 	void *result = BufferBackend::map();
 	mapped = true;
@@ -67,8 +67,8 @@ void *Buffer::map()
 
 bool Buffer::unmap()
 {
-	if(!can_map() || !mapped)
-		throw invalid_operation("Buffer::map");
+	if(size==0 || !can_map() || !mapped)
+		throw invalid_operation("Buffer::unmap");
 	bool result = BufferBackend::unmap();
 	mapped = false;
 	return result;