Rearrange soucre files into subdirectories

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

diff --git a/source/core/bufferable.cpp b/source/core/bufferable.cpp
new file mode 100644 (file)
index 0000000..d07f57c
--- /dev/null
+++ b/source/core/bufferable.cpp
@@ -0,0 +1,165 @@
+#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"
+
+using namespace std;
+
+namespace Msp {
+namespace GL {
+
+Bufferable::Bufferable():
+       buffer(0),
+       offset(0),
+       next_in_buffer(0),
+       prev_in_buffer(0),
+       location_dirty(false),
+       dirty(false)
+{ }
+
+Bufferable::~Bufferable()
+{
+       unlink_from_buffer();
+}
+
+void Bufferable::use_buffer(Buffer *buf, Bufferable *prev)
+{
+       if(prev && buf!=prev->buffer)
+               throw invalid_argument("Bufferable::use_buffer");
+
+       if(buffer)
+               unlink_from_buffer();
+
+       buffer = buf;
+       if(buffer)
+       {
+               prev_in_buffer = prev;
+               if(prev_in_buffer)
+               {
+                       next_in_buffer = prev_in_buffer->next_in_buffer;
+                       prev_in_buffer->next_in_buffer = this;
+               }
+       }
+
+       location_dirty = true;
+       dirty = true;
+       update_offset();
+}
+
+void Bufferable::change_buffer(Buffer *buf)
+{
+       for(Bufferable *b=this; b; b=b->next_in_buffer)
+       {
+               b->buffer = buf;
+               b->location_dirty = true;
+               b->dirty = true;
+       }
+       for(Bufferable *b=prev_in_buffer; b; b=b->prev_in_buffer)
+       {
+               b->buffer = buf;
+               b->location_dirty = true;
+               b->dirty = true;
+       }
+}
+
+unsigned Bufferable::get_required_buffer_size() const
+{
+       const Bufferable *last = this;
+       for(; last->next_in_buffer; last=last->next_in_buffer) ;
+       return last->offset+last->get_data_size();
+}
+
+Bufferable::AsyncUpdater *Bufferable::refresh_async() const
+{
+       return dirty ? new AsyncUpdater(*this) : 0;
+}
+
+void Bufferable::unlink_from_buffer()
+{
+       if(prev_in_buffer)
+               prev_in_buffer->next_in_buffer = next_in_buffer;
+       if(next_in_buffer)
+       {
+               next_in_buffer->prev_in_buffer = prev_in_buffer;
+               next_in_buffer->update_offset();
+       }
+       prev_in_buffer = 0;
+       next_in_buffer = 0;
+       buffer = 0;
+       offset = 0;
+}
+
+void Bufferable::update_offset()
+{
+       unsigned new_offset = 0;
+       if(prev_in_buffer)
+               new_offset = prev_in_buffer->offset+prev_in_buffer->get_data_size();
+
+       unsigned align = get_alignment();
+       new_offset += align-1;
+       new_offset -= new_offset%align;
+       if(new_offset!=offset)
+       {
+               offset = new_offset;
+               location_dirty = true;
+               dirty = true;
+       }
+
+       if(next_in_buffer)
+               next_in_buffer->update_offset();
+       else if(buffer && offset+get_data_size()>buffer->get_size())
+       {
+               location_dirty = true;
+               dirty = true;
+       }
+}
+
+void Bufferable::upload_data(char *target) const
+{
+       unsigned data_size = get_data_size();
+       if(location_dirty)
+       {
+               buffer->require_size(offset+data_size);
+               location_changed(buffer, offset, data_size);
+               location_dirty = false;
+       }
+
+       if(target)
+       {
+               const char *source = reinterpret_cast<const char *>(get_data_pointer());
+               copy(source, source+data_size, target);
+       }
+       else
+               buffer->sub_data(offset, data_size, get_data_pointer());
+       dirty = false;
+}
+
+
+Bufferable::AsyncUpdater::AsyncUpdater(const Bufferable &b):
+       bufferable(b)
+{
+       bufferable.buffer->require_size(bufferable.get_required_buffer_size());
+       mapped_address = reinterpret_cast<char *>(bufferable.buffer->map());
+}
+
+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)
+                       b->upload_data(mapped_address+b->offset);
+       for(const Bufferable *b=bufferable.next_in_buffer; b; b=b->next_in_buffer)
+               if(b->dirty)
+                       b->upload_data(mapped_address+b->offset);
+}
+
+} // namespace GL
+} // namespace Msp