Redesign asynchronous buffer uploads

[libs/gl.git] / source / core / buffer.cpp

diff --git a/source/core/buffer.cpp b/source/core/buffer.cpp
index 4a36937e7b745d1dd32f8c1e9ce19df0766037d7..b6f2e44b9e55555bebcfa08b80bf1ffeadb4a3c5 100644 (file)
--- 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)
@@ -64,5 +74,30 @@ bool Buffer::unmap()
        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::~AsyncTransfer()
+{
+       if(dest_addr)
+               finalize();
+}
+
 } // namespace GL
 } // namespace Msp