1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*
* Copyright 2022 Google LLC.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef skgpu_MutableTextureState_DEFINED
#define skgpu_MutableTextureState_DEFINED
#include "include/core/SkRefCnt.h"
#include "include/core/SkTypes.h"
#include "include/private/base/SkAnySubclass.h"
#include <cstddef>
namespace skgpu {
enum class BackendApi : unsigned int;
class MutableTextureStateData;
/**
* Since Skia and clients can both modify gpu textures and their connected state, Skia needs a way
* for clients to inform us if they have modifiend any of this state. In order to not need setters
* for every single API and state, we use this class to be a generic wrapper around all the mutable
* state. This class is used for calls that inform Skia of these texture/image state changes by the
* client as well as for requesting state changes to be done by Skia. The backend specific state
* that is wrapped by this class are located in files like:
* - include/gpu/vk/VulkanMutableTextureState.h
*/
class SK_API MutableTextureState : public SkRefCnt {
public:
MutableTextureState();
~MutableTextureState() override;
MutableTextureState(const MutableTextureState& that);
MutableTextureState& operator=(const MutableTextureState& that);
void set(const MutableTextureState& that);
BackendApi backend() const { return fBackend; }
// Returns true if the backend mutable state has been initialized.
bool isValid() const { return fIsValid; }
private:
friend class MutableTextureStateData;
friend class MutableTextureStatePriv;
// Size determined by looking at the MutableTextureStateData subclasses, then
// guessing-and-checking. Compiler will complain if this is too small - in that case,
// just increase the number.
inline constexpr static size_t kMaxSubclassSize = 16;
using AnyStateData = SkAnySubclass<MutableTextureStateData, kMaxSubclassSize>;
template <typename StateData>
MutableTextureState(BackendApi api, const StateData& data) : fBackend(api), fIsValid(true) {
fStateData.emplace<StateData>(data);
}
AnyStateData fStateData;
BackendApi fBackend;
bool fIsValid;
};
} // namespace skgpu
#endif // skgpu_MutableTextureState_DEFINED
|
