chromium/skia/public/mojom/bitmap_skbitmap_mojom_traits.cc

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "skia/public/mojom/bitmap_skbitmap_mojom_traits.h"

#include "base/ranges/algorithm.h"
#include "third_party/skia/include/core/SkPixelRef.h"

namespace mojo {
namespace {

// Maximum reasonable width and height. We don't try to deserialize bitmaps
// bigger than these dimensions.
// These limits are fairly large to accommodate images from the largest possible
// canvas.
constexpr int kMaxWidth = …;
constexpr int kMaxHeight = …;

// A custom SkPixelRef subclass to wrap a BigBuffer storing the pixel data.
class BigBufferPixelRef final : public SkPixelRef { … };

bool CreateSkBitmapForPixelData(SkBitmap* b,
                                const SkImageInfo& image_info,
                                base::span<const uint8_t> pixel_data) { … }

}  // namespace

// static
mojo_base::BigBufferView StructTraits<skia::mojom::BitmapN32DataView,
                                      SkBitmap>::pixel_data(const SkBitmap& b) { … }

// static
bool StructTraits<skia::mojom::BitmapN32DataView, SkBitmap>::Read(
    skia::mojom::BitmapN32DataView data,
    SkBitmap* b) { … }

// static
mojo_base::BigBufferView
StructTraits<skia::mojom::BitmapWithArbitraryBppDataView, SkBitmap>::pixel_data(
    const SkBitmap& b) { … }

// static
bool StructTraits<skia::mojom::BitmapWithArbitraryBppDataView, SkBitmap>::Read(
    skia::mojom::BitmapWithArbitraryBppDataView data,
    SkBitmap* b) { … }

// static
mojo_base::BigBufferView
StructTraits<skia::mojom::BitmapMappedFromTrustedProcessDataView,
             SkBitmap>::pixel_data(const SkBitmap& b) { … }

// static
bool StructTraits<
    skia::mojom::BitmapMappedFromTrustedProcessDataView,
    SkBitmap>::Read(skia::mojom::BitmapMappedFromTrustedProcessDataView data,
                    SkBitmap* b) { … }

// static
base::span<const uint8_t>
StructTraits<skia::mojom::InlineBitmapDataView, SkBitmap>::pixel_data(
    const SkBitmap& b) { … }

// static
bool StructTraits<skia::mojom::InlineBitmapDataView, SkBitmap>::Read(
    skia::mojom::InlineBitmapDataView data,
    SkBitmap* b) { … }

}  // namespace mojo