Make skia.mojom.Bitmap use shared buffer

ui/gfx/image/mojo/image_skia_struct_traits.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/image/mojo/image_skia_struct_traits.h"
 
 #include <string.h>
 
 #include "base/logging.h"
 #include "skia/public/interfaces/bitmap_skbitmap_struct_traits.h"
 
 namespace mojo {
 
-StructTraits<gfx::mojom::SharedBufferSkBitmapDataView,
-             SkBitmap>::Context::Context() = default;
-StructTraits<gfx::mojom::SharedBufferSkBitmapDataView,
-             SkBitmap>::Context::~Context() = default;
-
-// static
-void* StructTraits<gfx::mojom::SharedBufferSkBitmapDataView,
-                   SkBitmap>::SetUpContext(const SkBitmap& input) {
-  // Shared buffer is not a good way for huge images. Consider alternatives.
-  DCHECK_LT(input.width() * input.height(), 4000 * 4000);
-
-  const std::vector<uint8_t> serialized_sk_bitmap(
-      skia::mojom::Bitmap::Serialize(&input));
-
-  // Use a context to serialize the bitmap to a shared buffer only once.
-  Context* context = new Context;
-  context->buffer_byte_size = serialized_sk_bitmap.size();
-  context->shared_buffer_handle =
-      mojo::SharedBufferHandle::Create(context->buffer_byte_size);
-  mojo::ScopedSharedBufferMapping mapping =
-      context->shared_buffer_handle->Map(context->buffer_byte_size);
-  memcpy(mapping.get(), serialized_sk_bitmap.data(), context->buffer_byte_size);
-  return context;
-}
-
-// static
-void StructTraits<gfx::mojom::SharedBufferSkBitmapDataView,
-                  SkBitmap>::TearDownContext(const SkBitmap& input,
-                                             void* context) {
-  delete static_cast<Context*>(context);
-}
-
-// static
-mojo::ScopedSharedBufferHandle
-StructTraits<gfx::mojom::SharedBufferSkBitmapDataView,
-             SkBitmap>::shared_buffer_handle(const SkBitmap& input,
-                                             void* context) {
-  return (static_cast<Context*>(context))
-      ->shared_buffer_handle->Clone(
-          mojo::SharedBufferHandle::AccessMode::READ_ONLY);
-}
-
-// static
-uint64_t StructTraits<gfx::mojom::SharedBufferSkBitmapDataView,
-                      SkBitmap>::buffer_byte_size(const SkBitmap& input,
-                                                  void* context) {
-  return (static_cast<Context*>(context))->buffer_byte_size;
-}
-
-// static
-bool StructTraits<gfx::mojom::SharedBufferSkBitmapDataView, SkBitmap>::Read(
-    gfx::mojom::SharedBufferSkBitmapDataView data,
-    SkBitmap* out) {
-  mojo::ScopedSharedBufferHandle shared_buffer_handle =
-      data.TakeSharedBufferHandle();
-  if (!shared_buffer_handle.is_valid())
-    return false;
-
-  mojo::ScopedSharedBufferMapping mapping =
-      shared_buffer_handle->Map(data.buffer_byte_size());
-  if (!mapping)
-    return false;
-
-  const std::vector<uint8_t> serialized_sk_bitmap(
-      static_cast<uint8_t*>(mapping.get()),
-      static_cast<uint8_t*>(mapping.get()) + data.buffer_byte_size());
-
-  return skia::mojom::Bitmap::Deserialize(serialized_sk_bitmap, out);
-}
-
 // static
 float StructTraits<gfx::mojom::ImageSkiaRepDataView, gfx::ImageSkiaRep>::scale(
     const gfx::ImageSkiaRep& input) {
   const float scale = input.unscaled() ? 0.0f : input.scale();
   DCHECK_GE(scale, 0.0f);
 
   return scale;
 }
 
 // static
@@ skipping 55 matching lines @@
     out->AddRepresentation(image_rep);
 
   if (out->isNull())
     return false;
 
   out->SetReadOnly();
   return true;
 }
 
 }  // namespace mojo