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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/paint/paint_controller.h"
#include "third_party/blink/renderer/platform/graphics/paint/drawing_display_item.h"
#if DCHECK_IS_ON()
namespace blink {
class PaintController::DisplayItemListAsJSON {
STACK_ALLOCATED();
public:
DisplayItemListAsJSON(const DisplayItemList&,
const CachedSubsequenceMap&,
const Vector<PaintChunk>&,
DisplayItemList::JsonFlags);
String ToString() {
return SubsequenceAsJSONArrayRecursive(0, list_.size())
->ToPrettyJSONString();
}
private:
std::unique_ptr<JSONObject> SubsequenceAsJSONObjectRecursive();
std::unique_ptr<JSONArray> SubsequenceAsJSONArrayRecursive(size_t, size_t);
void AppendSubsequenceAsJSON(size_t, size_t, JSONArray&);
String ClientName(const DisplayItemClient&) const;
struct SubsequenceInfo {
SubsequenceInfo(const DisplayItemClient* client, size_t start, size_t end)
: client(client), start(start), end(end) {}
const DisplayItemClient* client;
size_t start;
size_t end;
};
const DisplayItemList& list_;
Vector<SubsequenceInfo> subsequences_;
Vector<SubsequenceInfo>::const_iterator current_subsequence_;
const Vector<PaintChunk>& chunks_;
Vector<PaintChunk>::const_iterator current_chunk_;
DisplayItemList::JsonFlags flags_;
};
PaintController::DisplayItemListAsJSON::DisplayItemListAsJSON(
const DisplayItemList& list,
const CachedSubsequenceMap& subsequence_map,
const Vector<PaintChunk>& chunks,
DisplayItemList::JsonFlags flags)
: list_(list),
chunks_(chunks),
current_chunk_(chunks.begin()),
flags_(flags) {
for (const auto& item : subsequence_map) {
subsequences_.push_back(
SubsequenceInfo(item.key, item.value.start, item.value.end));
}
std::sort(subsequences_.begin(), subsequences_.end(),
[](const SubsequenceInfo& a, const SubsequenceInfo& b) {
return a.start == b.start ? a.end > b.end : a.start < b.start;
});
current_subsequence_ = subsequences_.begin();
}
std::unique_ptr<JSONObject>
PaintController::DisplayItemListAsJSON::SubsequenceAsJSONObjectRecursive() {
const auto& subsequence = *current_subsequence_;
++current_subsequence_;
auto json_object = JSONObject::Create();
json_object->SetString("subsequence",
String::Format("client: %p ", subsequence.client) +
ClientName(*subsequence.client));
json_object->SetArray("chunks", SubsequenceAsJSONArrayRecursive(
subsequence.start, subsequence.end));
return json_object;
}
std::unique_ptr<JSONArray>
PaintController::DisplayItemListAsJSON::SubsequenceAsJSONArrayRecursive(
size_t start_item,
size_t end_item) {
std::unique_ptr<JSONArray> array = JSONArray::Create();
size_t item_index = start_item;
while (current_subsequence_ != subsequences_.end() &&
current_subsequence_->start < end_item) {
const auto& subsequence = *current_subsequence_;
DCHECK(subsequence.start >= item_index);
DCHECK(subsequence.end <= end_item);
if (item_index < subsequence.start)
AppendSubsequenceAsJSON(item_index, subsequence.start, *array);
array->PushObject(SubsequenceAsJSONObjectRecursive());
item_index = subsequence.end;
}
if (item_index < end_item)
AppendSubsequenceAsJSON(item_index, end_item, *array);
return array;
}
void PaintController::DisplayItemListAsJSON::AppendSubsequenceAsJSON(
size_t start_item,
size_t end_item,
JSONArray& json_array) {
DCHECK(end_item > start_item);
if (current_chunk_ == chunks_.end()) {
// We are in the middle of painting with incomplete chunks.
auto json_object = JSONObject::Create();
json_object->SetString("chunk", "incomplete");
json_object->SetArray(
"displayItems", list_.SubsequenceAsJSON(start_item, end_item, flags_));
json_array.PushObject(std::move(json_object));
return;
}
DCHECK(current_chunk_->begin_index == start_item);
while (current_chunk_ != chunks_.end() &&
current_chunk_->end_index <= end_item) {
const auto& chunk = *current_chunk_;
auto json_object = JSONObject::Create();
json_object->SetString(
"chunk", ClientName(chunk.id.client) + " " + chunk.id.ToString());
json_object->SetString("state", chunk.properties.ToString());
if (flags_ & DisplayItemList::kShowPaintRecords)
json_object->SetString("chunkData", chunk.ToString());
json_object->SetArray(
"displayItems",
list_.SubsequenceAsJSON(chunk.begin_index, chunk.end_index, flags_));
json_array.PushObject(std::move(json_object));
++current_chunk_;
}
}
String PaintController::DisplayItemListAsJSON::ClientName(
const DisplayItemClient& client) const {
return DisplayItemClient::SafeDebugName(
client, flags_ & DisplayItemList::kClientKnownToBeAlive);
}
void PaintController::ShowDebugDataInternal(
DisplayItemList::JsonFlags flags) const {
LOG(ERROR) << "current display item list: "
<< DisplayItemListAsJSON(
current_paint_artifact_->GetDisplayItemList(),
current_cached_subsequences_,
current_paint_artifact_->PaintChunks(), flags)
.ToString()
.Utf8()
.data();
LOG(ERROR) << "new display item list: "
<< DisplayItemListAsJSON(
new_display_item_list_, new_cached_subsequences_,
new_paint_chunks_.PaintChunks(),
// The clients in new_display_item_list_ are all alive.
flags | DisplayItemList::kClientKnownToBeAlive)
.ToString()
.Utf8()
.data();
}
void PaintController::ShowDebugData() const {
return ShowDebugDataInternal(DisplayItemList::kDefault);
}
void PaintController::ShowDebugDataWithRecords() const {
return ShowDebugDataInternal(DisplayItemList::kShowPaintRecords);
}
} // namespace blink
#endif // DCHECK_IS_ON()
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