ui/compositor/paint_recorder.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/compositor/paint_recorder.h"
   6
   7 #include "cc/playback/display_item_list.h"
   8 #include "cc/playback/drawing_display_item.h"
   9 #include "third_party/skia/include/core/SkPictureRecorder.h"
  10 #include "ui/compositor/paint_cache.h"
  11 #include "ui/compositor/paint_context.h"
  12 #include "ui/gfx/skia_util.h"
  13
  14 namespace ui {
  15
  16 PaintRecorder::PaintRecorder(const PaintContext& context,
  17                              const gfx::Size& recording_size,
  18                              PaintCache* cache)
  19     : context_(context),
  20       // The SkCanvas reference returned by beginRecording is shared with
  21       // the recorder_ so no need to store a RefPtr to it on this class, we just
  22       // store the gfx::Canvas.
  23       canvas_(skia::SharePtr(context.recorder_->beginRecording(
  24                                  gfx::RectToSkRect(gfx::Rect(recording_size))))
  25                   .get(),
  26               context.device_scale_factor_),
  27       cache_(cache) {
  28 #if DCHECK_IS_ON()
  29   DCHECK(!context.inside_paint_recorder_);
  30   context.inside_paint_recorder_ = true;
  31 #endif
  32 }
  33
  34 PaintRecorder::PaintRecorder(const PaintContext& context,
  35                              const gfx::Size& recording_size)
  36     : PaintRecorder(context, recording_size, nullptr) {
  37 }
  38
  39 PaintRecorder::~PaintRecorder() {
  40 #if DCHECK_IS_ON()
  41   context_.inside_paint_recorder_ = false;
  42 #endif
  43
  44   auto* item = context_.list_->CreateAndAppendItem<cc::DrawingDisplayItem>();
  45   item->SetNew(skia::AdoptRef(context_.recorder_->endRecordingAsPicture()));
  46   if (cache_)
  47     cache_->SetCache(item);
  48 }
  49
  50 }  // namespace ui