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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/paint_preview/renderer/paint_preview_recorder_utils.h"
#include <utility>
#include <variant>
#include "base/functional/bind.h"
#include "base/memory/raw_ptr.h"
#include "base/trace_event/common/trace_event_common.h"
#include "base/trace_event/trace_event.h"
#include "cc/paint/paint_image.h"
#include "cc/paint/paint_image_builder.h"
#include "cc/paint/paint_op_buffer_iterator.h"
#include "components/paint_preview/common/file_stream.h"
#include "components/paint_preview/common/paint_preview_tracker.h"
#include "mojo/public/cpp/base/shared_memory_utils.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkData.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkPicture.h"
#include "third_party/skia/include/core/SkRect.h"
#include "third_party/skia/include/core/SkRefCnt.h"
namespace paint_preview {
namespace {
// Converts a texture backed paint image to one that is not texture backed.
cc::PaintImage MakeUnaccelerated(const cc::PaintImage& paint_image) {
DCHECK(paint_image.IsTextureBacked());
auto sk_image = paint_image.GetSwSkImage();
if (sk_image->isLazyGenerated()) {
// Texture backed images should always be returned as SkImage_Raster type
// (bitmap). This is just a catchall in the event a lazy image is somehow
// returned in which case we should just raster it.
SkBitmap bitmap;
bitmap.allocPixels(sk_image->imageInfo(),
sk_image->imageInfo().minRowBytes());
if (!sk_image->readPixels(bitmap.pixmap(), 0, 0)) {
return paint_image;
}
// Make immutable to skip an extra copy.
bitmap.setImmutable();
sk_image = SkImages::RasterFromBitmap(bitmap);
}
return cc::PaintImageBuilder::WithDefault()
.set_id(cc::PaintImage::GetNextId())
.set_image(std::move(sk_image), cc::PaintImage::GetNextContentId())
.TakePaintImage();
}
class OpConverterAndTracker {
public:
explicit OpConverterAndTracker(PaintPreviewTracker* tracker)
: tracker_(tracker) {}
const cc::PaintOp* ConvertAndTrack(const cc::PaintOp& op) {
converted_op_.emplace<std::monostate>();
switch (op.GetType()) {
case cc::PaintOpType::kDrawTextBlob: {
const auto& text_blob_op = static_cast<const cc::DrawTextBlobOp&>(op);
tracker_->AddGlyphs(text_blob_op.blob.get());
break;
}
case cc::PaintOpType::kAnnotate: {
const auto& annotate_op = static_cast<const cc::AnnotateOp&>(op);
tracker_->AnnotateLink(GURL(std::string(reinterpret_cast<const char*>(
annotate_op.data->data()),
annotate_op.data->size())),
annotate_op.rect);
// Delete the op. We no longer need it.
return nullptr;
}
case cc::PaintOpType::kCustomData: {
const auto& custom_op = static_cast<const cc::CustomDataOp&>(op);
tracker_->TransformClipForFrame(custom_op.id);
break;
}
case cc::PaintOpType::kSave: {
tracker_->Save();
break;
}
case cc::PaintOpType::kSaveLayer: {
tracker_->Save();
break;
}
case cc::PaintOpType::kSaveLayerAlpha: {
tracker_->Save();
break;
}
case cc::PaintOpType::kRestore: {
tracker_->Restore();
break;
}
case cc::PaintOpType::kSetMatrix: {
const auto& matrix_op = static_cast<const cc::SetMatrixOp&>(op);
tracker_->SetMatrix(matrix_op.matrix.asM33());
break;
}
case cc::PaintOpType::kConcat: {
const auto& concat_op = static_cast<const cc::ConcatOp&>(op);
tracker_->Concat(concat_op.matrix.asM33());
break;
}
case cc::PaintOpType::kScale: {
const auto& scale_op = static_cast<const cc::ScaleOp&>(op);
tracker_->Scale(scale_op.sx, scale_op.sy);
break;
}
case cc::PaintOpType::kRotate: {
const auto& rotate_op = static_cast<const cc::RotateOp&>(op);
tracker_->Rotate(rotate_op.degrees);
break;
}
case cc::PaintOpType::kTranslate: {
const auto& translate_op = static_cast<const cc::TranslateOp&>(op);
tracker_->Translate(translate_op.dx, translate_op.dy);
break;
}
case cc::PaintOpType::kDrawImage: {
const auto& image_op = static_cast<const cc::DrawImageOp&>(op);
if (image_op.image.IsTextureBacked()) {
converted_op_.emplace<cc::DrawImageOp>(
MakeUnaccelerated(image_op.image), image_op.left, image_op.top,
image_op.sampling, &image_op.flags);
return &std::get<cc::DrawImageOp>(converted_op_);
}
break;
}
case cc::PaintOpType::kDrawImageRect: {
const auto& image_op = static_cast<const cc::DrawImageRectOp&>(op);
if (image_op.image.IsTextureBacked()) {
converted_op_.emplace<cc::DrawImageRectOp>(
MakeUnaccelerated(image_op.image), image_op.src, image_op.dst,
image_op.sampling, &image_op.flags, image_op.constraint);
return &std::get<cc::DrawImageRectOp>(converted_op_);
}
break;
}
default:
break;
}
return &op;
}
private:
raw_ptr<PaintPreviewTracker> tracker_;
std::variant<std::monostate, cc::DrawImageOp, cc::DrawImageRectOp>
converted_op_;
};
} // namespace
sk_sp<const SkPicture> PaintRecordToSkPicture(const cc::PaintRecord& recording,
PaintPreviewTracker* tracker,
const gfx::Rect& bounds) {
// base::Unretained is safe as |tracker| outlives the usage of
// |custom_callback|.
cc::PlaybackCallbacks callbacks;
callbacks.custom_callback =
base::BindRepeating(&PaintPreviewTracker::CustomDataToSkPictureCallback,
base::Unretained(tracker));
OpConverterAndTracker converter_and_tracker(tracker);
callbacks.convert_op_callback =
base::BindRepeating(&OpConverterAndTracker::ConvertAndTrack,
base::Unretained(&converter_and_tracker));
auto skp = recording.ToSkPicture(
SkRect::MakeWH(bounds.width(), bounds.height()), nullptr, callbacks);
if (!skp || skp->cullRect().width() == 0 || skp->cullRect().height() == 0)
return nullptr;
return skp;
}
void BuildResponse(PaintPreviewTracker* tracker,
mojom::PaintPreviewCaptureResponse* response) {
// Ensure these always exist.
DCHECK(tracker);
DCHECK(response);
response->embedding_token = tracker->EmbeddingToken();
tracker->MoveLinks(&response->links);
PictureSerializationContext* picture_context =
tracker->GetPictureSerializationContext();
if (!picture_context)
return;
for (const auto& id_pair : picture_context->content_id_to_embedding_token) {
response->content_id_to_embedding_token.insert(id_pair);
}
}
} // namespace paint_preview
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