OLD | NEW |
---|---|
(Empty) | |
1 // Copyright 2017 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 #include "ui/gfx/image/mojo/image_skia_struct_traits.h" | |
6 | |
7 #include <string.h> | |
8 | |
9 #include "base/logging.h" | |
10 #include "skia/public/interfaces/bitmap_skbitmap_struct_traits.h" | |
11 | |
12 namespace mojo { | |
13 | |
14 StructTraits<gfx::mojom::ImageSkiaRepDataView, | |
15 gfx::ImageSkiaRep>::Context::Context() = default; | |
16 StructTraits<gfx::mojom::ImageSkiaRepDataView, | |
17 gfx::ImageSkiaRep>::Context::~Context() = default; | |
18 | |
19 // static | |
20 void* StructTraits<gfx::mojom::ImageSkiaRepDataView, | |
21 gfx::ImageSkiaRep>::SetUpContext(const gfx::ImageSkiaRep& | |
22 input) { | |
23 // Shared buffer is not a good way for huge images. Consider alternatives. | |
24 DCHECK_LT(input.pixel_width() * input.pixel_height(), 4000 * 4000); | |
25 | |
26 const std::vector<uint8_t> serialized_sk_bitmap( | |
27 skia::mojom::Bitmap::Serialize(&(input.sk_bitmap()))); | |
28 | |
29 // Use a context to serialize bitmap to a shared buffer only once. | |
30 Context* context = new Context; | |
31 context->buffer_byte_size = serialized_sk_bitmap.size(); | |
32 context->shared_buffer_handle = | |
33 mojo::SharedBufferHandle::Create(context->buffer_byte_size); | |
34 mojo::ScopedSharedBufferMapping mapping = | |
35 context->shared_buffer_handle->Map(context->buffer_byte_size); | |
36 memcpy(mapping.get(), serialized_sk_bitmap.data(), context->buffer_byte_size); | |
37 return context; | |
38 } | |
39 | |
40 // static | |
41 void StructTraits<gfx::mojom::ImageSkiaRepDataView, gfx::ImageSkiaRep>:: | |
42 TearDownContext(const gfx::ImageSkiaRep& input, void* context) { | |
43 delete static_cast<Context*>(context); | |
44 } | |
45 | |
46 // static | |
47 mojo::ScopedSharedBufferHandle StructTraits< | |
48 gfx::mojom::ImageSkiaRepDataView, | |
49 gfx::ImageSkiaRep>::shared_buffer_handle(const gfx::ImageSkiaRep& input, | |
50 void* context) { | |
51 return (static_cast<Context*>(context)) | |
52 ->shared_buffer_handle->Clone( | |
53 mojo::SharedBufferHandle::AccessMode::READ_ONLY); | |
54 } | |
55 | |
56 // static | |
57 uint64_t StructTraits<gfx::mojom::ImageSkiaRepDataView, gfx::ImageSkiaRep>:: | |
58 buffer_byte_size(const gfx::ImageSkiaRep& input, void* context) { | |
59 return (static_cast<Context*>(context))->buffer_byte_size; | |
60 } | |
61 | |
62 // static | |
63 float StructTraits<gfx::mojom::ImageSkiaRepDataView, gfx::ImageSkiaRep>::scale( | |
64 const gfx::ImageSkiaRep& input) { | |
65 const float scale = input.unscaled() ? 0.0f : input.scale(); | |
66 DCHECK_GE(scale, 0.0f); | |
67 | |
68 return scale; | |
69 } | |
70 | |
71 // static | |
72 bool StructTraits<gfx::mojom::ImageSkiaRepDataView, gfx::ImageSkiaRep>::Read( | |
73 gfx::mojom::ImageSkiaRepDataView data, | |
74 gfx::ImageSkiaRep* out) { | |
75 // An acceptable scale must be greater or equal to 0. | |
msw
2017/03/23 20:47:53
nit: "greater than"
xiyuan
2017/03/24 05:45:31
Done.
| |
76 if (data.scale() < 0) | |
77 return false; | |
78 | |
79 mojo::ScopedSharedBufferHandle shared_buffer_handle = | |
80 data.TakeSharedBufferHandle(); | |
81 if (!shared_buffer_handle.is_valid()) | |
82 return false; | |
83 | |
84 mojo::ScopedSharedBufferMapping mapping = | |
85 shared_buffer_handle->Map(data.buffer_byte_size()); | |
86 if (!mapping) | |
87 return false; | |
88 | |
89 const std::vector<uint8_t> serialized_sk_bitmap( | |
90 static_cast<uint8_t*>(mapping.get()), | |
91 static_cast<uint8_t*>(mapping.get()) + data.buffer_byte_size()); | |
92 | |
93 SkBitmap bitmap; | |
94 if (!skia::mojom::Bitmap::Deserialize(serialized_sk_bitmap, &bitmap)) | |
95 return false; | |
96 | |
97 *out = gfx::ImageSkiaRep(bitmap, data.scale()); | |
98 return true; | |
99 } | |
100 | |
101 // static | |
102 void* StructTraits<gfx::mojom::ImageSkiaDataView, gfx::ImageSkia>::SetUpContext( | |
103 const gfx::ImageSkia& input) { | |
104 // Use a context to return a stable list of ImageSkiaRep objects. That is, | |
105 // multiple calls of image_reps() should return exactly the same list of | |
106 // ImageSkiaRep objects. So that ImageSkiaRep with the same backing pixel | |
107 // buffer is properly serialized and only once. | |
108 auto* image_reps = new std::vector<gfx::ImageSkiaRep>; | |
109 | |
110 // Strip out empty image reps. Needed because ImageSkia::image_reps does not | |
111 // filter out empty SkBitmap. | |
112 for (auto& input_rep : input.image_reps()) { | |
113 if (!StructTraits<gfx::mojom::ImageSkiaRepDataView, | |
114 gfx::ImageSkiaRep>::IsNull(input_rep)) { | |
115 image_reps->emplace_back(input_rep); | |
116 } | |
117 } | |
118 return image_reps; | |
119 } | |
120 | |
121 // static | |
122 void StructTraits<gfx::mojom::ImageSkiaDataView, | |
123 gfx::ImageSkia>::TearDownContext(const gfx::ImageSkia& input, | |
124 void* context) { | |
125 delete static_cast<std::vector<gfx::ImageSkiaRep>*>(context); | |
126 } | |
127 | |
128 // static | |
129 const std::vector<gfx::ImageSkiaRep>& | |
130 StructTraits<gfx::mojom::ImageSkiaDataView, gfx::ImageSkia>::image_reps( | |
131 const gfx::ImageSkia& input, | |
132 void* context) { | |
133 return *(static_cast<std::vector<gfx::ImageSkiaRep>*>(context)); | |
134 } | |
135 | |
136 // static | |
137 bool StructTraits<gfx::mojom::ImageSkiaDataView, gfx::ImageSkia>::Read( | |
138 gfx::mojom::ImageSkiaDataView data, | |
139 gfx::ImageSkia* out) { | |
140 DCHECK(out->isNull()); | |
141 | |
142 std::vector<gfx::ImageSkiaRep> image_reps; | |
143 if (!data.ReadImageReps(&image_reps)) | |
144 return false; | |
145 | |
146 for (const auto& image_rep : image_reps) | |
147 out->AddRepresentation(image_rep); | |
148 | |
149 if (out->isNull()) | |
150 return false; | |
151 | |
152 out->SetReadOnly(); | |
153 return true; | |
154 } | |
155 | |
156 } // namespace mojo | |
OLD | NEW |