Blender  V3.3
COM_SharedOperationBuffers.cc
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1 /* SPDX-License-Identifier: GPL-2.0-or-later
2  * Copyright 2021 Blender Foundation. */
3 
5 #include "COM_NodeOperation.h"
6 
7 namespace blender::compositor {
8 
9 SharedOperationBuffers::BufferData::BufferData()
10  : buffer(nullptr), registered_reads(0), received_reads(0), is_rendered(false)
11 {
12 }
13 
14 SharedOperationBuffers::BufferData &SharedOperationBuffers::get_buffer_data(NodeOperation *op)
15 {
16  return buffers_.lookup_or_add_cb(op, []() { return BufferData(); });
17 }
18 
19 bool SharedOperationBuffers::is_area_registered(NodeOperation *op, const rcti &area_to_render)
20 {
21  /* TODO: Possibly refactor to "request_area". Current implementation is incomplete:
22  * partial overlapping, etc. Leading to more rendering than necessary. */
23 
24  BufferData &buf_data = get_buffer_data(op);
25  for (rcti &reg_rect : buf_data.render_areas) {
26  if (BLI_rcti_inside_rcti(&reg_rect, &area_to_render)) {
27  return true;
28  }
29  }
30  return false;
31 }
32 
33 void SharedOperationBuffers::register_area(NodeOperation *op, const rcti &area_to_render)
34 {
35  get_buffer_data(op).render_areas.append(area_to_render);
36 }
37 
38 bool SharedOperationBuffers::has_registered_reads(NodeOperation *op)
39 {
40  return get_buffer_data(op).registered_reads > 0;
41 }
42 
43 void SharedOperationBuffers::register_read(NodeOperation *read_op)
44 {
45  get_buffer_data(read_op).registered_reads++;
46 }
47 
48 Vector<rcti> SharedOperationBuffers::get_areas_to_render(NodeOperation *op,
49  const int offset_x,
50  const int offset_y)
51 {
52  Span<rcti> render_areas = get_buffer_data(op).render_areas.as_span();
53  Vector<rcti> dst_areas;
54  for (rcti dst : render_areas) {
55  BLI_rcti_translate(&dst, offset_x, offset_y);
56  dst_areas.append(std::move(dst));
57  }
58  return dst_areas;
59 }
60 
61 bool SharedOperationBuffers::is_operation_rendered(NodeOperation *op)
62 {
63  return get_buffer_data(op).is_rendered;
64 }
65 
66 void SharedOperationBuffers::set_rendered_buffer(NodeOperation *op,
67  std::unique_ptr<MemoryBuffer> buffer)
68 {
69  BufferData &buf_data = get_buffer_data(op);
70  BLI_assert(buf_data.received_reads == 0);
71  BLI_assert(buf_data.buffer == nullptr);
72  buf_data.buffer = std::move(buffer);
73  buf_data.is_rendered = true;
74 }
75 
76 MemoryBuffer *SharedOperationBuffers::get_rendered_buffer(NodeOperation *op)
77 {
78  BLI_assert(is_operation_rendered(op));
79  return get_buffer_data(op).buffer.get();
80 }
81 
82 void SharedOperationBuffers::read_finished(NodeOperation *read_op)
83 {
84  BufferData &buf_data = get_buffer_data(read_op);
85  buf_data.received_reads++;
86  BLI_assert(buf_data.received_reads > 0 && buf_data.received_reads <= buf_data.registered_reads);
87  if (buf_data.received_reads == buf_data.registered_reads) {
88  /* Dispose buffer. */
89  buf_data.buffer = nullptr;
90  }
91 }
92 
93 } // namespace blender::compositor
#define BLI_assert(a)
Definition: BLI_assert.h:46
void BLI_rcti_translate(struct rcti *rect, int x, int y)
Definition: rct.c:559
bool BLI_rcti_inside_rcti(const rcti *rct_a, const rcti *rct_b)
Definition: rct.c:197
void append(const T &value)
Definition: BLI_vector.hh:433
a MemoryBuffer contains access to the data of a chunk
NodeOperation contains calculation logic.
ccl_global float * buffer