+++ /dev/null
-#include <stdexcept>
-#include "buffer.h"
-#include "bufferable.h"
-
-using namespace std;
-
-namespace Msp {
-namespace GL {
-
-Bufferable::Bufferable():
- buffer(0),
- buffer_offset(0),
- next_in_buffer(0),
- prev_in_buffer(0),
- 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)
- prev_in_buffer->next_in_buffer = this;
- }
-
- update_buffer_offset();
-}
-
-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_buffer_offset();
- }
- prev_in_buffer = 0;
- next_in_buffer = 0;
-}
-
-void Bufferable::update_buffer_offset()
-{
- unsigned offset = 0;
- if(prev_in_buffer)
- offset = prev_in_buffer->buffer_offset+prev_in_buffer->get_data_size();
-
- unsigned align = get_alignment();
- offset += align-1;
- offset -= offset%align;
- if(offset!=buffer_offset)
- {
- buffer_offset = offset;
- dirty = true;
- offset_changed();
- }
-
- if(next_in_buffer)
- next_in_buffer->update_buffer_offset();
-
- /* Do not resize the buffer here, as the offsets may change multiple times
- before the buffer is actually used */
-}
-
-void Bufferable::update_buffer_data() const
-{
- if(buffer_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->buffer_offset+last->get_data_size();
-
- if(total_size>buffer->get_size())
- {
- buffer->data(total_size, 0);
- /* Resizing the buffer invalidates its contents. Non-dirty data may
- be in use, so reupload it. */
- for(const Bufferable *b=last; b; b=b->prev_in_buffer)
- if(!b->dirty)
- b->upload_data();
- }
- }
-
- upload_data();
- dirty = false;
-}
-
-} // namespace GL
-} // namespace Msp