X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fcore%2Fbuffer.cpp;h=36ac440a54426c186c16ae238c51a337312445e8;hp=4a36937e7b745d1dd32f8c1e9ce19df0766037d7;hb=HEAD;hpb=6c5c2bcbd4025cba36f48f6f326466351f4f2971

diff --git a/source/core/buffer.cpp b/source/core/buffer.cpp
index 4a36937e..36ac440a 100644
--- a/source/core/buffer.cpp
+++ b/source/core/buffer.cpp
@@ -32,14 +32,24 @@ void Buffer::data(const void *d)
 
 void Buffer::sub_data(size_t off, size_t sz, const void *d)
 {
-	if(size==0)
-		throw invalid_operation("Buffer::sub_data");
-	if(off>size || off+sz>size)
-		throw out_of_range("Buffer::sub_data");
-
+	check_sub_data(off, sz, "Buffer::sub_data");
 	BufferBackend::sub_data(off, sz, d);
 }
 
+Buffer::AsyncTransfer Buffer::sub_data_async(size_t off, size_t sz)
+{
+	check_sub_data(off, sz, "Buffer::sub_data_async");
+	return AsyncTransfer(*this, off, sz);
+}
+
+void Buffer::check_sub_data(size_t off, size_t sz, const char *func)
+{
+	if(size==0)
+		throw invalid_operation(func);
+	if(off>get_total_size() || off%size+sz>size)
+		throw out_of_range(func);
+}
+
 void Buffer::require_size(size_t req_sz) const
 {
 	if(size<req_sz)
@@ -48,7 +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;
@@ -57,12 +67,52 @@ 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;
 }
 
+
+Buffer::AsyncTransfer::AsyncTransfer(Buffer &b, size_t o, size_t s):
+	buffer(&b),
+	offset(o),
+	size(s),
+	dest_addr(0)
+{
+	allocate();
+}
+
+Buffer::AsyncTransfer::AsyncTransfer(AsyncTransfer &&other):
+	buffer(other.buffer),
+	offset(other.offset),
+	size(other.size),
+	dest_addr(other.dest_addr)
+{
+	other.dest_addr = 0;
+}
+
+Buffer::AsyncTransfer &Buffer::AsyncTransfer::operator=(AsyncTransfer &&other)
+{
+	if(dest_addr)
+		finalize();
+
+	buffer = other.buffer;
+	offset = other.offset;
+	size = other.size;
+	dest_addr = other.dest_addr;
+
+	other.dest_addr = 0;
+
+	return *this;
+}
+
+Buffer::AsyncTransfer::~AsyncTransfer()
+{
+	if(dest_addr)
+		finalize();
+}
+
 } // namespace GL
 } // namespace Msp