1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef GPU_COMMAND_BUFFER_COMMON_GPU_MEMORY_ALLOCATION_H_
6#define GPU_COMMAND_BUFFER_COMMON_GPU_MEMORY_ALLOCATION_H_
7
8#include "base/basictypes.h"
9
10namespace gpu {
11
12// These are per context memory allocation limits set by the GpuMemoryManager
13// and assigned to the browser and renderer context.
14// They will change over time, given memory availability, and browser state.
15struct MemoryAllocation {
16  enum PriorityCutoff {
17    // Allow no allocations.
18    CUTOFF_ALLOW_NOTHING,
19    // Allow only allocations that are strictly required for correct rendering.
20    // For compositors, this is what is visible.
21    CUTOFF_ALLOW_REQUIRED_ONLY,
22    // Allow allocations that are not strictly needed for correct rendering, but
23    // are nice to have for performance. For compositors, this includes textures
24    // that are a few screens away from being visible.
25    CUTOFF_ALLOW_NICE_TO_HAVE,
26    // Allow all allocations.
27    CUTOFF_ALLOW_EVERYTHING,
28    CUTOFF_LAST = CUTOFF_ALLOW_EVERYTHING
29  };
30
31  // Limits when this renderer is visible.
32  uint64 bytes_limit_when_visible;
33  PriorityCutoff priority_cutoff_when_visible;
34
35  MemoryAllocation()
36      : bytes_limit_when_visible(0),
37        priority_cutoff_when_visible(CUTOFF_ALLOW_NOTHING) {
38  }
39
40  MemoryAllocation(uint64 bytes_limit_when_visible)
41      : bytes_limit_when_visible(bytes_limit_when_visible),
42        priority_cutoff_when_visible(CUTOFF_ALLOW_EVERYTHING) {
43  }
44
45  bool Equals(const MemoryAllocation& other) const {
46    return bytes_limit_when_visible ==
47               other.bytes_limit_when_visible &&
48        priority_cutoff_when_visible == other.priority_cutoff_when_visible;
49  }
50};
51
52}  // namespace content
53
54#endif // GPU_COMMAND_BUFFER_COMMON_GPU_MEMORY_ALLOCATION_H_
55