#include <stdexcept>
+#include <msp/core/raii.h>
+#include <msp/gl/extensions/arb_direct_state_access.h>
+#include "bindable.h"
#include "buffer.h"
#include "bufferable.h"
Bufferable::Bufferable():
buffer(0),
- buffer_offset(0),
+ offset(0),
next_in_buffer(0),
prev_in_buffer(0),
dirty(false)
{
prev_in_buffer = prev;
if(prev_in_buffer)
+ {
+ next_in_buffer = prev_in_buffer->next_in_buffer;
prev_in_buffer->next_in_buffer = this;
+ }
}
- update_buffer_offsets();
+ dirty = true;
+ update_offset();
+}
+
+Bufferable::AsyncUpdater *Bufferable::refresh_async() const
+{
+ return dirty ? new AsyncUpdater(*this) : 0;
}
void Bufferable::unlink_from_buffer()
if(next_in_buffer)
{
next_in_buffer->prev_in_buffer = prev_in_buffer;
- next_in_buffer->update_buffer_offsets();
+ next_in_buffer->update_offset();
}
prev_in_buffer = 0;
next_in_buffer = 0;
+ buffer = 0;
}
-void Bufferable::update_buffer_offsets()
+void Bufferable::update_offset()
{
- unsigned offset = 0;
+ unsigned new_offset = 0;
if(prev_in_buffer)
- offset = prev_in_buffer->buffer_offset+prev_in_buffer->get_data_size();
+ new_offset = prev_in_buffer->offset+prev_in_buffer->get_data_size();
- if(offset!=buffer_offset)
+ unsigned align = get_alignment();
+ new_offset += align-1;
+ new_offset -= new_offset%align;
+ if(new_offset!=offset)
{
- buffer_offset = offset;
+ offset = new_offset;
dirty = true;
+ offset_changed();
}
if(next_in_buffer)
- next_in_buffer->update_buffer_offsets();
+ next_in_buffer->update_offset();
+
+ /* Do not resize the buffer here, as more bufferables may be added before
+ the buffer is actually used. */
}
-void Bufferable::update_buffer_data() const
+bool Bufferable::resize_buffer() const
{
- const Bufferable *first = this;
- for(; first->prev_in_buffer; first=first->prev_in_buffer) ;
+ if(offset+get_data_size()>=buffer->get_size())
+ {
+ const Bufferable *last = this;
+ for(; last->next_in_buffer; last=last->next_in_buffer) ;
+
+ unsigned total_size = last->offset+last->get_data_size();
+
+ if(total_size>buffer->get_size())
+ {
+ buffer->data(total_size, 0);
+ return true;
+ }
+ }
+
+ return false;
+}
- unsigned total_size = 0;
- for(const Bufferable *b=first; b; b=b->next_in_buffer)
- total_size += b->get_data_size();
+void Bufferable::update_buffer() const
+{
+ Conditional<BindRestore> _bind(!ARB_direct_state_access, buffer, buffer->get_type());
- buffer->data(total_size, 0);
- for(const Bufferable *b=first; b; b=b->next_in_buffer)
+ if(resize_buffer())
{
- buffer->sub_data(b->buffer_offset, b->get_data_size(), b->get_data());
- b->dirty = false;
+ /* Resizing the buffer invalidates its contents. Non-dirty data may
+ be in use, so reupload it. */
+ for(const Bufferable *b=prev_in_buffer; b; b=b->prev_in_buffer)
+ if(!b->dirty)
+ b->upload_data(0);
+ for(const Bufferable *b=next_in_buffer; b; b=b->next_in_buffer)
+ if(!b->dirty)
+ b->upload_data(0);
}
+
+ upload_data(0);
+ dirty = false;
+}
+
+void Bufferable::upload_data(char *target) const
+{
+ if(target)
+ {
+ const char *source = reinterpret_cast<const char *>(get_data_pointer());
+ copy(source, source+get_data_size(), target);
+ }
+ else
+ buffer->sub_data(offset, get_data_size(), get_data_pointer());
+}
+
+
+Bufferable::AsyncUpdater::AsyncUpdater(const Bufferable &b):
+ bufferable(b)
+{
+ buffer_resized = bufferable.resize_buffer();
+ mapped_address = reinterpret_cast<char *>(bufferable.buffer->map(WRITE_ONLY));
+}
+
+Bufferable::AsyncUpdater::~AsyncUpdater()
+{
+ bufferable.buffer->unmap();
+}
+
+void Bufferable::AsyncUpdater::upload_data()
+{
+ bufferable.upload_data(mapped_address+bufferable.offset);
+ // Update all bufferables in the same buffer at once
+ for(const Bufferable *b=bufferable.prev_in_buffer; b; b=b->prev_in_buffer)
+ if(b->dirty || buffer_resized)
+ {
+ b->upload_data(mapped_address+b->offset);
+ b->dirty = false;
+ }
+ for(const Bufferable *b=bufferable.next_in_buffer; b; b=b->next_in_buffer)
+ if(b->dirty || buffer_resized)
+ {
+ b->upload_data(mapped_address+b->offset);
+ b->dirty = false;
+ }
}
} // namespace GL