2 #include <msp/core/raii.h>
3 #include <msp/gl/extensions/arb_direct_state_access.h>
6 #include "bufferable.h"
13 Bufferable::Bufferable():
18 location_dirty(false),
22 Bufferable::~Bufferable()
27 void Bufferable::use_buffer(Buffer *buf, Bufferable *prev)
29 if(prev && buf!=prev->buffer)
30 throw invalid_argument("Bufferable::use_buffer");
38 prev_in_buffer = prev;
41 next_in_buffer = prev_in_buffer->next_in_buffer;
42 prev_in_buffer->next_in_buffer = this;
46 location_dirty = true;
51 Bufferable::AsyncUpdater *Bufferable::refresh_async() const
53 return dirty ? new AsyncUpdater(*this) : 0;
56 void Bufferable::unlink_from_buffer()
59 prev_in_buffer->next_in_buffer = next_in_buffer;
62 next_in_buffer->prev_in_buffer = prev_in_buffer;
63 next_in_buffer->update_offset();
70 void Bufferable::update_offset()
72 unsigned new_offset = 0;
74 new_offset = prev_in_buffer->offset+prev_in_buffer->get_data_size();
76 unsigned align = get_alignment();
77 new_offset += align-1;
78 new_offset -= new_offset%align;
79 if(new_offset!=offset)
82 location_dirty = true;
87 next_in_buffer->update_offset();
88 else if(buffer && offset+get_data_size()>buffer->get_size())
90 location_dirty = true;
95 bool Bufferable::resize_buffer() const
97 if(offset+get_data_size()>=buffer->get_size())
99 const Bufferable *last = this;
100 for(; last->next_in_buffer; last=last->next_in_buffer) ;
102 unsigned total_size = last->offset+last->get_data_size();
104 if(total_size>buffer->get_size())
106 buffer->data(total_size, 0);
114 void Bufferable::update_buffer_size() const
118 Conditional<BindRestore> _bind(!ARB_direct_state_access, buffer, buffer->get_type());
120 /* Resizing the buffer invalidates its contents. Non-dirty data may
121 be in use, so reupload it. */
122 for(const Bufferable *b=prev_in_buffer; b; b=b->prev_in_buffer)
125 for(const Bufferable *b=next_in_buffer; b; b=b->next_in_buffer)
131 void Bufferable::upload_data(char *target) const
133 unsigned data_size = get_data_size();
136 update_buffer_size();
137 location_changed(buffer, offset, data_size);
138 location_dirty = false;
143 const char *source = reinterpret_cast<const char *>(get_data_pointer());
144 copy(source, source+data_size, target);
147 buffer->sub_data(offset, data_size, get_data_pointer());
152 Bufferable::AsyncUpdater::AsyncUpdater(const Bufferable &b):
155 buffer_resized = bufferable.resize_buffer();
156 mapped_address = reinterpret_cast<char *>(bufferable.buffer->map(WRITE_ONLY));
159 Bufferable::AsyncUpdater::~AsyncUpdater()
161 bufferable.buffer->unmap();
164 void Bufferable::AsyncUpdater::upload_data()
166 bufferable.upload_data(mapped_address+bufferable.offset);
167 // Update all bufferables in the same buffer at once
168 for(const Bufferable *b=bufferable.prev_in_buffer; b; b=b->prev_in_buffer)
169 if(b->dirty || buffer_resized)
170 b->upload_data(mapped_address+b->offset);
171 for(const Bufferable *b=bufferable.next_in_buffer; b; b=b->next_in_buffer)
172 if(b->dirty || buffer_resized)
173 b->upload_data(mapped_address+b->offset);