X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fbuffer.cpp;fp=source%2Fcore%2Fbuffer.cpp;h=78e85af0456b721a27316d9622849f00a2b37c3e;hb=7b569bbfcfb65d8d88b47ac42ee1df6a7d27e784;hp=ecf7b49a15e35d29493c83f1a6ea2f8013065483;hpb=bea2bcf1aa353b1dd8d1728931ef0508677bd2c6;p=libs%2Fgl.git

diff --git a/source/core/buffer.cpp b/source/core/buffer.cpp
index ecf7b49a..78e85af0 100644
--- a/source/core/buffer.cpp
+++ b/source/core/buffer.cpp
@@ -15,6 +15,8 @@ using namespace std;
 namespace Msp {
 namespace GL {
 
+Buffer *Buffer::scratch_binding = 0;
+
 Buffer::Buffer():
 	size(0),
 	allocated(false)
@@ -29,6 +31,8 @@ Buffer::Buffer():
 
 Buffer::~Buffer()
 {
+	if(this==scratch_binding)
+		unbind_scratch();
 	glDeleteBuffers(1, &id);
 }
 
@@ -60,9 +64,8 @@ void Buffer::allocate()
 			glNamedBufferStorage(id, size, 0, flags);
 		else
 		{
-			glBindBuffer(GL_ARRAY_BUFFER, id);
+			bind_scratch();
 			glBufferStorage(GL_ARRAY_BUFFER, size, 0, flags);
-			glBindBuffer(GL_ARRAY_BUFFER, 0);
 		}
 
 		allocated = true;
@@ -87,9 +90,8 @@ void Buffer::data(const void *d)
 		glNamedBufferData(id, size, d, STATIC_DRAW);
 	else
 	{
-		glBindBuffer(GL_ARRAY_BUFFER, id);
+		bind_scratch();
 		glBufferData(GL_ARRAY_BUFFER, size, d, STATIC_DRAW);
-		glBindBuffer(GL_ARRAY_BUFFER, 0);
 	}
 
 	allocated = true;
@@ -116,9 +118,8 @@ void Buffer::sub_data(unsigned off, unsigned sz, const void *d)
 		glNamedBufferSubData(id, off, sz, d);
 	else
 	{
-		glBindBuffer(GL_ARRAY_BUFFER, id);
+		bind_scratch();
 		glBufferSubData(GL_ARRAY_BUFFER, off, sz, d);
-		glBindBuffer(GL_ARRAY_BUFFER, 0);
 	}
 }
 
@@ -137,9 +138,8 @@ void *Buffer::map()
 		return glMapNamedBufferRange(id, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
 	else
 	{
-		glBindBuffer(GL_ARRAY_BUFFER, id);
+		bind_scratch();
 		void *result = glMapBufferRange(GL_ARRAY_BUFFER, 0, size, GL_MAP_READ_BIT|GL_MAP_WRITE_BIT);
-		glBindBuffer(GL_ARRAY_BUFFER, 0);
 		return result;
 	}
 }
@@ -151,9 +151,8 @@ bool Buffer::unmap()
 		return glUnmapNamedBuffer(id);
 	else if(OES_mapbuffer)
 	{
-		glBindBuffer(GL_ARRAY_BUFFER, id);
+		bind_scratch();
 		bool result = glUnmapBuffer(GL_ARRAY_BUFFER);
-		glBindBuffer(GL_ARRAY_BUFFER, 0);
 		return result;
 	}
 	else
@@ -170,5 +169,23 @@ void Buffer::set_debug_name(const string &name)
 #endif
 }
 
+void Buffer::bind_scratch()
+{
+	if(scratch_binding!=this)
+	{
+		glBindBuffer(GL_ARRAY_BUFFER, id);
+		scratch_binding = this;
+	}
+}
+
+void Buffer::unbind_scratch()
+{
+	if(scratch_binding)
+	{
+		glBindBuffer(GL_ARRAY_BUFFER, 0);
+		scratch_binding = 0;
+	}
+}
+
 } // namespace GL
 } // namespace Msp