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// Copyright 2013 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 "cc/resources/ui_resource_bitmap.h"
#include <stdint.h>
#include <memory>
#include "base/check_op.h"
#include "base/notreached.h"
#include "base/numerics/checked_math.h"
#include "third_party/skia/include/core/SkImageInfo.h"
#include "third_party/skia/include/core/SkMallocPixelRef.h"
#include "third_party/skia/include/core/SkPixelRef.h"
namespace cc {
namespace {
UIResourceBitmap::UIResourceFormat SkColorTypeToUIResourceFormat(
SkColorType sk_type) {
UIResourceBitmap::UIResourceFormat format = UIResourceBitmap::RGBA8;
switch (sk_type) {
case kN32_SkColorType:
format = UIResourceBitmap::RGBA8;
break;
case kAlpha_8_SkColorType:
format = UIResourceBitmap::ALPHA_8;
break;
default:
NOTREACHED() << "Invalid SkColorType for UIResourceBitmap: " << sk_type;
break;
}
return format;
}
} // namespace
void UIResourceBitmap::Create(sk_sp<SkPixelRef> pixel_ref,
const SkImageInfo& info,
UIResourceFormat format) {
DCHECK(info.width());
DCHECK(info.height());
DCHECK(pixel_ref);
DCHECK(pixel_ref->isImmutable());
format_ = format;
info_ = info;
pixel_ref_ = std::move(pixel_ref);
}
void UIResourceBitmap::DrawToCanvas(SkCanvas* canvas, SkPaint* paint) {
DCHECK_NE(info_.colorType(), kUnknown_SkColorType);
SkBitmap bitmap;
bitmap.setInfo(info_, pixel_ref_.get()->rowBytes());
bitmap.setPixelRef(pixel_ref_, 0, 0);
canvas->drawBitmap(bitmap, 0, 0, paint);
canvas->flush();
}
size_t UIResourceBitmap::SizeInBytes() const {
if (!pixel_ref_)
return 0u;
base::CheckedNumeric<size_t> size_in_bytes = pixel_ref_->rowBytes();
size_in_bytes *= info_.height();
return size_in_bytes.ValueOrDie();
}
UIResourceBitmap::UIResourceBitmap(const SkBitmap& skbitmap) {
DCHECK(skbitmap.isImmutable());
sk_sp<SkPixelRef> pixel_ref = sk_ref_sp(skbitmap.pixelRef());
Create(std::move(pixel_ref), skbitmap.info(),
SkColorTypeToUIResourceFormat(skbitmap.colorType()));
}
UIResourceBitmap::UIResourceBitmap(const gfx::Size& size, bool is_opaque) {
SkAlphaType alphaType = is_opaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
SkImageInfo info =
SkImageInfo::MakeN32(size.width(), size.height(), alphaType);
sk_sp<SkPixelRef> pixel_ref(
SkMallocPixelRef::MakeAllocate(info, info.minRowBytes()));
pixel_ref->setImmutable();
Create(std::move(pixel_ref), info, UIResourceBitmap::RGBA8);
}
UIResourceBitmap::UIResourceBitmap(sk_sp<SkPixelRef> pixel_ref,
const gfx::Size& size) {
// TODO(khushalsagar): It doesn't make sense to SkPixelRef to pass around
// encoded data.
SkImageInfo info = SkImageInfo::Make(
size.width(), size.height(), kUnknown_SkColorType, kOpaque_SkAlphaType);
Create(std::move(pixel_ref), info, UIResourceBitmap::ETC1);
}
UIResourceBitmap::UIResourceBitmap(const UIResourceBitmap& other) = default;
UIResourceBitmap::~UIResourceBitmap() = default;
} // namespace cc
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