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| 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 const std::vector<uint8_t> serialized_sk_bitmap( |
| 24 skia::mojom::Bitmap::Serialize(&(input.sk_bitmap()))); |
| 25 |
| 26 // Use a context to serialize bitmap to a shared buffer only once. |
| 27 Context* context = new Context; |
| 28 context->buffer_byte_size = serialized_sk_bitmap.size(); |
| 29 context->shared_buffer_handle = |
| 30 mojo::SharedBufferHandle::Create(context->buffer_byte_size); |
| 31 mojo::ScopedSharedBufferMapping mapping = |
| 32 context->shared_buffer_handle->Map(context->buffer_byte_size); |
| 33 memcpy(mapping.get(), serialized_sk_bitmap.data(), context->buffer_byte_size); |
| 34 return context; |
| 35 } |
| 36 |
| 37 // static |
| 38 void StructTraits<gfx::mojom::ImageSkiaRepDataView, gfx::ImageSkiaRep>:: |
| 39 TearDownContext(const gfx::ImageSkiaRep& input, void* context) { |
| 40 delete static_cast<Context*>(context); |
| 41 } |
| 42 |
| 43 // static |
| 44 mojo::ScopedSharedBufferHandle StructTraits< |
| 45 gfx::mojom::ImageSkiaRepDataView, |
| 46 gfx::ImageSkiaRep>::shared_buffer_handle(const gfx::ImageSkiaRep& input, |
| 47 void* context) { |
| 48 return (static_cast<Context*>(context)) |
| 49 ->shared_buffer_handle->Clone( |
| 50 mojo::SharedBufferHandle::AccessMode::READ_ONLY); |
| 51 } |
| 52 |
| 53 // static |
| 54 uint32_t StructTraits<gfx::mojom::ImageSkiaRepDataView, gfx::ImageSkiaRep>:: |
| 55 buffer_byte_size(const gfx::ImageSkiaRep& input, void* context) { |
| 56 return (static_cast<Context*>(context))->buffer_byte_size; |
| 57 } |
| 58 |
| 59 // static |
| 60 bool StructTraits<gfx::mojom::ImageSkiaRepDataView, gfx::ImageSkiaRep>::Read( |
| 61 gfx::mojom::ImageSkiaRepDataView data, |
| 62 gfx::ImageSkiaRep* out) { |
| 63 mojo::ScopedSharedBufferHandle shared_buffer_handle = |
| 64 data.TakeSharedBufferHandle(); |
| 65 if (!shared_buffer_handle.is_valid()) |
| 66 return false; |
| 67 |
| 68 mojo::ScopedSharedBufferMapping mapping = |
| 69 shared_buffer_handle->Map(data.buffer_byte_size()); |
| 70 if (!mapping) |
| 71 return false; |
| 72 |
| 73 const std::vector<uint8_t> serialized_sk_bitmap( |
| 74 static_cast<uint8_t*>(mapping.get()), |
| 75 static_cast<uint8_t*>(mapping.get()) + data.buffer_byte_size()); |
| 76 |
| 77 SkBitmap bitmap; |
| 78 if (!skia::mojom::Bitmap::Deserialize(serialized_sk_bitmap, &bitmap)) |
| 79 return false; |
| 80 |
| 81 *out = gfx::ImageSkiaRep(bitmap, data.scale()); |
| 82 return true; |
| 83 } |
| 84 |
| 85 // static |
| 86 void* StructTraits<gfx::mojom::ImageSkiaDataView, gfx::ImageSkia>::SetUpContext( |
| 87 const gfx::ImageSkia& input) { |
| 88 // Use a context to return a stable list of ImageSkiaRep objects. That is, |
| 89 // multiple calls of image_reps() should return exactly the same list of |
| 90 // ImageSkiaRep objects. So that ImageSkiaRep with the same backing pixel |
| 91 // buffer is properly serialized and only once. |
| 92 auto* image_reps = new std::vector<gfx::ImageSkiaRep>; |
| 93 |
| 94 // Strip out empty image reps. Needed because ImageSkia::image_reps does not |
| 95 // filter out empty SkBitmap. |
| 96 for (auto& input_rep : input.image_reps()) { |
| 97 if (!StructTraits<gfx::mojom::ImageSkiaRepDataView, |
| 98 gfx::ImageSkiaRep>::IsNull(input_rep)) { |
| 99 image_reps->emplace_back(input_rep); |
| 100 } |
| 101 } |
| 102 return image_reps; |
| 103 } |
| 104 |
| 105 // static |
| 106 void StructTraits<gfx::mojom::ImageSkiaDataView, |
| 107 gfx::ImageSkia>::TearDownContext(const gfx::ImageSkia& input, |
| 108 void* context) { |
| 109 delete static_cast<std::vector<gfx::ImageSkiaRep>*>(context); |
| 110 } |
| 111 |
| 112 // static |
| 113 const std::vector<gfx::ImageSkiaRep>& |
| 114 StructTraits<gfx::mojom::ImageSkiaDataView, gfx::ImageSkia>::image_reps( |
| 115 const gfx::ImageSkia& input, |
| 116 void* context) { |
| 117 return *(static_cast<std::vector<gfx::ImageSkiaRep>*>(context)); |
| 118 } |
| 119 |
| 120 // static |
| 121 bool StructTraits<gfx::mojom::ImageSkiaDataView, gfx::ImageSkia>::Read( |
| 122 gfx::mojom::ImageSkiaDataView data, |
| 123 gfx::ImageSkia* out) { |
| 124 DCHECK(out->isNull()); |
| 125 |
| 126 std::vector<gfx::ImageSkiaRep> image_reps; |
| 127 if (!data.ReadImageReps(&image_reps)) |
| 128 return false; |
| 129 |
| 130 for (const auto& image_rep : image_reps) |
| 131 out->AddRepresentation(image_rep); |
| 132 |
| 133 if (out->isNull()) |
| 134 return false; |
| 135 |
| 136 out->SetReadOnly(); |
| 137 return true; |
| 138 } |
| 139 |
| 140 } // namespace mojo |
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