[NOT FOR COMMIT] Fully replace SkCanvas uses.

skia/ext/cdl_picture_recorder.cc

+// Copyright (c) 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 <stddef.h>
+#include <stdint.h>
+
+#include "cdl_picture_recorder.h"
+
+#if CDL_ENABLED
+
+#include "base/trace_event/trace_event.h"
+#include "third_party/skia/include/core/SkBBHFactory.h"
+#include "skia/ext/cdl_picture_buffer.h"
+
+#include "skia/ext/cdl_picture.h"
+#include "skia/ext/cdl_picture_recording_canvas.h"
+
+base::Lock CdlPictureRecorder::lock;
+std::shared_ptr<CdlPictureRecordingCanvas> CdlPictureRecorder::free_recorder;
+
+CdlPictureRecorder::CdlPictureRecorder() {
+  fActivelyRecording = false;
+  start_offset_ = 0;
+  fFlags = 0;
+}
+CdlPictureRecorder::~CdlPictureRecorder() {
+  if (fRecorder.get()) {
+    base::AutoLock hold(lock);
+    fRecorder.swap(free_recorder);
+  }
+}
+
+CdlCanvas* CdlPictureRecorder::beginRecording(const SkRect& bounds,
+                                              SkBBHFactory* bbhFactory,
+                                              uint32_t recordFlags) {
+  fCullRect = bounds;
+  fFlags = recordFlags;
+
+  // TODO(cdl): Painting is relying on a funky behavior of SkPictureRecorder;
+  // calling beginRecording multiple times results in appending to the
+  // existing SkRecord, but resetting the SkRecorder which seems wrong.
+  if (fActivelyRecording)
+    return fRecorder.get();
+
+  /*
+  if (bbhFactory) {
+    fBBH.reset((*bbhFactory)(cullRect));
+    SkASSERT(fBBH.get());
+  }
+  */
+
+  // TRACE_EVENT_ASYNC_BEGIN0("cc", "CdlPictureRecorder::beginRecording", this);
+
+  // Create new recorder only if it's above a threshold in size.
+  if (!fRecord.get() || fRecord->getRecordOffset() >= 4096 - 256)
+    fRecord.reset(new CdlPictureBuffer(bounds));
+  else
+    fRecord->resetForNextPicture(bounds);
+
+  start_offset_ = fRecord->getRecordOffset();
+
+  if (!fRecorder.get()) {
+    base::AutoLock hold(lock);
+    fRecorder.swap(free_recorder);
+  }
+
+  if (fRecorder.get()) {
+    fRecorder->reset(fRecord.get(), bounds);
+  } else {
+    fRecorder.reset(new CdlPictureRecordingCanvas(fRecord.get(), bounds));
+  }
+
+  fActivelyRecording = true;
+  return this->getRecordingCanvas();
+}
+
+CdlCanvas* CdlPictureRecorder::getRecordingCanvas() {
+  return fActivelyRecording ? fRecorder.get() : nullptr;
+}
+
+sk_sp<CdlPicture> CdlPictureRecorder::finishRecordingAsPicture(
+    uint32_t endFlags) {
+  // TRACE_EVENT_ASYNC_END0("cc", "CdlPictureRecorder::beginRecording", this);
+  // CHECK(fActivelyRecording);
+  fActivelyRecording = false;
+
+  fRecorder->restoreToCount(
+      1);  // If we were missing any restores, add them now.
+
+  sk_sp<CdlPicture> pic = sk_make_sp<CdlPicture>(
+      fRecord, fCullRect, start_offset_, fRecord->getRecordOffset());
+  return pic;
+}
+
+#endif  // CDL_ENABLED