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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright 2021, Blender Foundation.
*/
#include "COM_SharedOperationBuffers.h"
#include "COM_NodeOperation.h"
namespace blender::compositor {
SharedOperationBuffers::BufferData::BufferData()
: buffer(nullptr), registered_reads(0), received_reads(0), is_rendered(false)
{
}
SharedOperationBuffers::BufferData &SharedOperationBuffers::get_buffer_data(NodeOperation *op)
{
return buffers_.lookup_or_add_cb(op, []() { return BufferData(); });
}
/**
* Whether given operation area to render is already registered.
* TODO: Possibly refactor to "request_area". Current implementation is incomplete: partial
* overlapping, etc. Leading to more rendering than necessary.
*/
bool SharedOperationBuffers::is_area_registered(NodeOperation *op, const rcti &area_to_render)
{
BufferData &buf_data = get_buffer_data(op);
for (rcti ®_rect : buf_data.render_areas) {
if (BLI_rcti_inside_rcti(®_rect, &area_to_render)) {
return true;
}
}
return false;
}
/**
* Registers an operation area to render.
*/
void SharedOperationBuffers::register_area(NodeOperation *op, const rcti &area_to_render)
{
get_buffer_data(op).render_areas.append(area_to_render);
}
/**
* Whether given operation has any registered reads (other operation registered it depends on given
* operation).
*/
bool SharedOperationBuffers::has_registered_reads(NodeOperation *op)
{
return get_buffer_data(op).registered_reads > 0;
}
/**
* Registers an operation read (other operation depends on given operation).
*/
void SharedOperationBuffers::register_read(NodeOperation *read_op)
{
get_buffer_data(read_op).registered_reads++;
}
/**
* Get registered areas given operation needs to render.
*/
Vector<rcti> SharedOperationBuffers::get_areas_to_render(NodeOperation *op,
const int offset_x,
const int offset_y)
{
Span<rcti> render_areas = get_buffer_data(op).render_areas.as_span();
Vector<rcti> dst_areas;
for (rcti dst : render_areas) {
BLI_rcti_translate(&dst, offset_x, offset_y);
dst_areas.append(std::move(dst));
}
return dst_areas;
}
/**
* Whether this operation buffer has already been rendered.
*/
bool SharedOperationBuffers::is_operation_rendered(NodeOperation *op)
{
return get_buffer_data(op).is_rendered;
}
/**
* Stores given operation rendered buffer.
*/
void SharedOperationBuffers::set_rendered_buffer(NodeOperation *op,
std::unique_ptr<MemoryBuffer> buffer)
{
BufferData &buf_data = get_buffer_data(op);
BLI_assert(buf_data.received_reads == 0);
BLI_assert(buf_data.buffer == nullptr);
buf_data.buffer = std::move(buffer);
buf_data.is_rendered = true;
}
/**
* Get given operation rendered buffer.
*/
MemoryBuffer *SharedOperationBuffers::get_rendered_buffer(NodeOperation *op)
{
BLI_assert(is_operation_rendered(op));
return get_buffer_data(op).buffer.get();
}
/**
* Reports an operation has finished reading given operation. If all given operation dependencies
* have finished its buffer will be disposed.
*/
void SharedOperationBuffers::read_finished(NodeOperation *read_op)
{
BufferData &buf_data = get_buffer_data(read_op);
buf_data.received_reads++;
BLI_assert(buf_data.received_reads > 0 && buf_data.received_reads <= buf_data.registered_reads);
if (buf_data.received_reads == buf_data.registered_reads) {
/* Dispose buffer. */
buf_data.buffer = nullptr;
}
}
} // namespace blender::compositor
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