| Flutter Impeller |

texture.h
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1 // Copyright 2013 The Flutter 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 FLUTTER_IMPELLER_CORE_TEXTURE_H_
6 #define FLUTTER_IMPELLER_CORE_TEXTURE_H_
7
8 #include <string_view>
9
10 #include "flutter/fml/mapping.h"
11 #include "impeller/core/formats.h"
12 #include "impeller/core/texture_descriptor.h"
13 #include "impeller/geometry/size.h"
14
15 namespace impeller {
16
17 class Texture {
18 public:
19 virtual ~Texture();
20
21 /// @brief Label this resource for inspection in GPU debugging tools.
22 ///
23 /// This functionality may be disabled in release builds.
24 virtual void SetLabel(std::string_view label) = 0;
25
26 /// @brief Label this resource for inspection in GPU debugging tools, with
27 /// label and trailing will be concatenated together.
28 ///
29 /// This functionality may be disabled in release builds.
30 virtual void SetLabel(std::string_view label, std::string_view trailing) = 0;
31
32 // Deprecated: use BlitPass::AddCopy instead.
33 [[nodiscard]] bool SetContents(const uint8_t* contents,
34 size_t length,
35 size_t slice = 0,
36 bool is_opaque = false);
37
38 // Deprecated: use BlitPass::AddCopy instead.
39 [[nodiscard]] bool SetContents(std::shared_ptr<const fml::Mapping> mapping,
40 size_t slice = 0,
41 bool is_opaque = false);
42
43 virtual bool IsValid() const = 0;
44
45 virtual ISize GetSize() const = 0;
46
47 bool IsOpaque() const;
48
49 size_t GetMipCount() const;
50
51 const TextureDescriptor& GetTextureDescriptor() const;
52
53 /// Update the coordinate system used by the texture.
54 ///
55 /// The setting is used to conditionally invert the coordinates to
56 /// account for the different origin of GLES textures.
57 void SetCoordinateSystem(TextureCoordinateSystem coordinate_system);
58
59 TextureCoordinateSystem GetCoordinateSystem() const;
60
61 virtual Scalar GetYCoordScale() const;
62
63 /// Returns true if mipmaps have never been generated.
64 /// The contents of the mipmap may be out of date if the root texture has been
65 /// modified and the mipmaps hasn't been regenerated.
66 bool NeedsMipmapGeneration() const;
67
68 protected:
69 explicit Texture(TextureDescriptor desc);
70
71 [[nodiscard]] virtual bool OnSetContents(const uint8_t* contents,
72 size_t length,
73 size_t slice) = 0;
74
75 [[nodiscard]] virtual bool OnSetContents(
76 std::shared_ptr<const fml::Mapping> mapping,
77 size_t slice) = 0;
78
79 bool mipmap_generated_ = false;
80
81 private:
82 TextureCoordinateSystem coordinate_system_ =
83 TextureCoordinateSystem::kRenderToTexture;
84 const TextureDescriptor desc_;
85 bool is_opaque_ = false;
86
87 bool IsSliceValid(size_t slice) const;
88
89 Texture(const Texture&) = delete;
90
91 Texture& operator=(const Texture&) = delete;
92 };
93
94 } // namespace impeller
95
96 #endif // FLUTTER_IMPELLER_CORE_TEXTURE_H_
impeller::Texture
Definition: texture.h:17
impeller::Texture::GetMipCount
size_t GetMipCount() const
Definition: texture.cc:53
impeller::Texture::IsOpaque
bool IsOpaque() const
Definition: texture.cc:49
impeller::Texture::~Texture
virtual ~Texture()
impeller::Texture::GetTextureDescriptor
const TextureDescriptor & GetTextureDescriptor() const
Definition: texture.cc:57
impeller::Texture::GetCoordinateSystem
TextureCoordinateSystem GetCoordinateSystem() const
Definition: texture.cc:77
impeller::Texture::OnSetContents
virtual bool OnSetContents(std::shared_ptr< const fml::Mapping > mapping, size_t slice)=0
impeller::Texture::SetLabel
virtual void SetLabel(std::string_view label, std::string_view trailing)=0
Label this resource for inspection in GPU debugging tools, with label and trailing will be concatenat...
impeller::Texture::NeedsMipmapGeneration
bool NeedsMipmapGeneration() const
Definition: texture.cc:85
impeller::Texture::Texture
Texture(TextureDescriptor desc)
Definition: texture.cc:11
impeller::Texture::mipmap_generated_
bool mipmap_generated_
Definition: texture.h:79
impeller::Texture::SetCoordinateSystem
void SetCoordinateSystem(TextureCoordinateSystem coordinate_system)
Definition: texture.cc:73
impeller::Texture::SetLabel
virtual void SetLabel(std::string_view label)=0
Label this resource for inspection in GPU debugging tools.
impeller::Texture::GetYCoordScale
virtual Scalar GetYCoordScale() const
Definition: texture.cc:81
impeller::Texture::GetSize
virtual ISize GetSize() const =0
impeller::Texture::OnSetContents
virtual bool OnSetContents(const uint8_t *contents, size_t length, size_t slice)=0
impeller::Texture::IsValid
virtual bool IsValid() const =0
impeller::Texture::SetContents
bool SetContents(const uint8_t *contents, size_t length, size_t slice=0, bool is_opaque=false)
Definition: texture.cc:15
formats.h
impeller
Definition: allocation.cc:12
impeller::Scalar
float Scalar
Definition: scalar.h:19
impeller::TextureCoordinateSystem
TextureCoordinateSystem
Definition: formats.h:327
impeller::TextureCoordinateSystem::kRenderToTexture
@ kRenderToTexture
size.h
impeller::TSize
Definition: size.h:25
impeller::TextureDescriptor
A lightweight object that describes the attributes of a texture that can then used an allocator to cr...
Definition: texture_descriptor.h:38
texture_descriptor.h