X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fbufferable.cpp;fp=source%2Fcore%2Fbufferable.cpp;h=d07f57cc4e430f5d337c67cd7ebd47917eb3a456;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/core/bufferable.cpp b/source/core/bufferable.cpp
new file mode 100644
index 00000000..d07f57cc
--- /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