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// Copyright 2014 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 "third_party/blink/renderer/platform/graphics/static_bitmap_image.h"
#include "base/numerics/checked_math.h"
#include "gpu/command_buffer/client/gles2_interface.h"
#include "third_party/blink/renderer/platform/graphics/accelerated_static_bitmap_image.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context.h"
#include "third_party/blink/renderer/platform/graphics/image_observer.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_image.h"
#include "third_party/blink/renderer/platform/graphics/unaccelerated_static_bitmap_image.h"
#include "third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_contents.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "third_party/skia/include/gpu/GrContext.h"
namespace blink {
scoped_refptr<StaticBitmapImage> StaticBitmapImage::Create(
sk_sp<SkImage> image,
base::WeakPtr<WebGraphicsContext3DProviderWrapper>
context_provider_wrapper) {
if (!image)
return nullptr;
if (image->isTextureBacked()) {
CHECK(context_provider_wrapper);
return AcceleratedStaticBitmapImage::CreateFromSkImage(
image, std::move(context_provider_wrapper));
}
return UnacceleratedStaticBitmapImage::Create(image);
}
scoped_refptr<StaticBitmapImage> StaticBitmapImage::Create(PaintImage image) {
DCHECK(!image.GetSkImage()->isTextureBacked());
return UnacceleratedStaticBitmapImage::Create(std::move(image));
}
scoped_refptr<StaticBitmapImage> StaticBitmapImage::Create(
scoped_refptr<Uint8Array>&& image_pixels,
const SkImageInfo& info) {
SkPixmap pixmap(info, image_pixels->Data(), info.minRowBytes());
Uint8Array* pixels = image_pixels.get();
if (pixels) {
pixels->AddRef();
image_pixels = nullptr;
}
return Create(SkImage::MakeFromRaster(
pixmap,
[](const void*, void* p) { static_cast<Uint8Array*>(p)->Release(); },
pixels));
}
scoped_refptr<StaticBitmapImage> StaticBitmapImage::Create(
WTF::ArrayBufferContents& contents,
const SkImageInfo& info) {
SkPixmap pixmap(info, contents.Data(), info.minRowBytes());
return Create(SkImage::MakeFromRaster(pixmap, nullptr, nullptr));
}
void StaticBitmapImage::DrawHelper(cc::PaintCanvas* canvas,
const PaintFlags& flags,
const FloatRect& dst_rect,
const FloatRect& src_rect,
ImageClampingMode clamp_mode,
const PaintImage& image) {
FloatRect adjusted_src_rect = src_rect;
adjusted_src_rect.Intersect(SkRect::MakeWH(image.width(), image.height()));
if (dst_rect.IsEmpty() || adjusted_src_rect.IsEmpty())
return; // Nothing to draw.
canvas->drawImageRect(image, adjusted_src_rect, dst_rect, &flags,
WebCoreClampingModeToSkiaRectConstraint(clamp_mode));
}
scoped_refptr<StaticBitmapImage> StaticBitmapImage::ConvertToColorSpace(
sk_sp<SkColorSpace> color_space,
SkColorType color_type) {
DCHECK(color_space);
sk_sp<SkImage> skia_image = PaintImageForCurrentFrame().GetSkImage();
// If we don't need to change the color type, use SkImage::makeColorSpace()
if (skia_image->colorType() == color_type) {
skia_image = skia_image->makeColorSpace(color_space);
return StaticBitmapImage::Create(skia_image, skia_image->isTextureBacked()
? ContextProviderWrapper()
: nullptr);
}
// Otherwise, create a surface and draw on that to avoid GPU readback.
sk_sp<SkColorSpace> src_color_space = skia_image->refColorSpace();
if (!src_color_space.get())
src_color_space = SkColorSpace::MakeSRGB();
sk_sp<SkColorSpace> dst_color_space = color_space;
if (!dst_color_space.get())
dst_color_space = SkColorSpace::MakeSRGB();
SkImageInfo info =
SkImageInfo::Make(skia_image->width(), skia_image->height(), color_type,
skia_image->alphaType(), dst_color_space);
sk_sp<SkSurface> surface = nullptr;
if (skia_image->isTextureBacked()) {
GrContext* gr = ContextProviderWrapper()->ContextProvider()->GetGrContext();
surface = SkSurface::MakeRenderTarget(gr, SkBudgeted::kNo, info);
} else {
surface = SkSurface::MakeRaster(info);
}
SkPaint paint;
surface->getCanvas()->drawImage(skia_image, 0, 0, &paint);
sk_sp<SkImage> converted_skia_image = surface->makeImageSnapshot();
DCHECK(converted_skia_image.get());
DCHECK(skia_image.get() != converted_skia_image.get());
return StaticBitmapImage::Create(converted_skia_image,
converted_skia_image->isTextureBacked()
? ContextProviderWrapper()
: nullptr);
}
bool StaticBitmapImage::ConvertToArrayBufferContents(
scoped_refptr<StaticBitmapImage> src_image,
WTF::ArrayBufferContents& dest_contents,
const IntRect& rect,
const CanvasColorParams& color_params,
bool is_accelerated) {
uint8_t bytes_per_pixel = color_params.BytesPerPixel();
base::CheckedNumeric<int> data_size = bytes_per_pixel;
data_size *= rect.Size().Area();
if (!data_size.IsValid() ||
data_size.ValueOrDie() > v8::TypedArray::kMaxLength)
return false;
size_t alloc_size_in_bytes = rect.Size().Area() * bytes_per_pixel;
if (!src_image) {
auto data = WTF::ArrayBufferContents::CreateDataHandle(
alloc_size_in_bytes, WTF::ArrayBufferContents::kZeroInitialize);
if (!data)
return false;
WTF::ArrayBufferContents result(std::move(data),
WTF::ArrayBufferContents::kNotShared);
result.Transfer(dest_contents);
return true;
}
const bool may_have_stray_area =
is_accelerated // GPU readback may fail silently
|| rect.X() < 0 || rect.Y() < 0 ||
rect.MaxX() > src_image->Size().Width() ||
rect.MaxY() > src_image->Size().Height();
WTF::ArrayBufferContents::InitializationPolicy initialization_policy =
may_have_stray_area ? WTF::ArrayBufferContents::kZeroInitialize
: WTF::ArrayBufferContents::kDontInitialize;
auto data = WTF::ArrayBufferContents::CreateDataHandle(alloc_size_in_bytes,
initialization_policy);
if (!data)
return false;
WTF::ArrayBufferContents result(std::move(data),
WTF::ArrayBufferContents::kNotShared);
SkColorType color_type =
(color_params.GetSkColorType() == kRGBA_F16_SkColorType)
? kRGBA_F16_SkColorType
: kRGBA_8888_SkColorType;
SkImageInfo info = SkImageInfo::Make(
rect.Width(), rect.Height(), color_type, kUnpremul_SkAlphaType,
color_params.GetSkColorSpaceForSkSurfaces());
sk_sp<SkImage> sk_image = src_image->PaintImageForCurrentFrame().GetSkImage();
bool read_pixels_successful = sk_image->readPixels(
info, result.Data(), info.minRowBytes(), rect.X(), rect.Y());
DCHECK(read_pixels_successful ||
!sk_image->bounds().intersect(SkIRect::MakeXYWH(
rect.X(), rect.Y(), info.width(), info.height())));
result.Transfer(dest_contents);
return true;
}
const gpu::SyncToken& StaticBitmapImage::GetSyncToken() const {
static const gpu::SyncToken sync_token;
return sync_token;
}
} // namespace blink
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