Part 8 of cc/ directory shuffles: resources

cc/picture.cc

-// Copyright 2012 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 "base/debug/trace_event.h"
-#include "cc/content_layer_client.h"
-#include "cc/debug/rendering_stats.h"
-#include "cc/picture.h"
-#include "skia/ext/analysis_canvas.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkData.h"
-#include "third_party/skia/include/utils/SkPictureUtils.h"
-#include "ui/gfx/rect_conversions.h"
-#include "ui/gfx/skia_util.h"
-
-namespace {
-// URI label for a lazily decoded SkPixelRef.
-const char labelLazyDecoded[] = "lazy";
-}
-
-namespace cc {
-
-scoped_refptr<Picture> Picture::Create(gfx::Rect layer_rect) {
-  return make_scoped_refptr(new Picture(layer_rect));
-}
-
-Picture::Picture(gfx::Rect layer_rect)
-    : layer_rect_(layer_rect) {
-}
-
-Picture::Picture(const skia::RefPtr<SkPicture>& picture,
-                 gfx::Rect layer_rect,
-                 gfx::Rect opaque_rect) :
-    layer_rect_(layer_rect),
-    opaque_rect_(opaque_rect),
-    picture_(picture) {
-}
-
-Picture::~Picture() {
-}
-
-scoped_refptr<Picture> Picture::GetCloneForDrawingOnThread(
-    unsigned thread_index) const {
-  // SkPicture is not thread-safe to rasterize with, this returns a clone
-  // to rasterize with on a specific thread.
-  CHECK_GT(clones_.size(), thread_index);
-  return clones_[thread_index];
-}
-
-void Picture::CloneForDrawing(int num_threads) {
-  TRACE_EVENT1("cc", "Picture::CloneForDrawing", "num_threads", num_threads);
-
-  DCHECK(picture_);
-  scoped_array<SkPicture> clones(new SkPicture[num_threads]);
-  picture_->clone(&clones[0], num_threads);
-
-  clones_.clear();
-  for (int i = 0; i < num_threads; i++) {
-    scoped_refptr<Picture> clone = make_scoped_refptr(
-        new Picture(skia::AdoptRef(new SkPicture(clones[i])),
-                    layer_rect_,
-                    opaque_rect_));
-    clones_.push_back(clone);
-  }
-}
-
-void Picture::Record(ContentLayerClient* painter,
-                     RenderingStats* stats,
-                     const SkTileGridPicture::TileGridInfo& tileGridInfo) {
-  TRACE_EVENT2("cc", "Picture::Record",
-               "width", layer_rect_.width(), "height", layer_rect_.height());
-
-  // Record() should only be called once.
-  DCHECK(!picture_);
-  DCHECK(!tileGridInfo.fTileInterval.isEmpty());
-  picture_ = skia::AdoptRef(new SkTileGridPicture(
-      layer_rect_.width(), layer_rect_.height(), tileGridInfo));
-
-  SkCanvas* canvas = picture_->beginRecording(
-      layer_rect_.width(),
-      layer_rect_.height(),
-      SkPicture::kUsePathBoundsForClip_RecordingFlag |
-      SkPicture::kOptimizeForClippedPlayback_RecordingFlag);
-
-  canvas->save();
-  canvas->translate(SkFloatToScalar(-layer_rect_.x()),
-                    SkFloatToScalar(-layer_rect_.y()));
-
-  SkPaint paint;
-  paint.setAntiAlias(false);
-  paint.setXfermodeMode(SkXfermode::kClear_Mode);
-  SkRect layer_skrect = SkRect::MakeXYWH(layer_rect_.x(),
-                                         layer_rect_.y(),
-                                         layer_rect_.width(),
-                                         layer_rect_.height());
-  canvas->clipRect(layer_skrect);
-  canvas->drawRect(layer_skrect, paint);
-
-  gfx::RectF opaque_layer_rect;
-  base::TimeTicks begin_paint_time;
-  if (stats)
-    begin_paint_time = base::TimeTicks::Now();
-  painter->PaintContents(canvas, layer_rect_, &opaque_layer_rect);
-  if (stats) {
-    stats->totalPaintTime += base::TimeTicks::Now() - begin_paint_time;
-    stats->totalPixelsPainted +=
-        layer_rect_.width() * layer_rect_.height();
-  }
-
-  canvas->restore();
-  picture_->endRecording();
-
-  opaque_rect_ = gfx::ToEnclosedRect(opaque_layer_rect);
-}
-
-void Picture::Raster(
-    SkCanvas* canvas,
-    gfx::Rect content_rect,
-    float contents_scale) {
-  TRACE_EVENT2("cc", "Picture::Raster",
-               "layer width", layer_rect_.width(),
-               "layer height", layer_rect_.height());
-  DCHECK(picture_);
-
-  canvas->save();
-  canvas->clipRect(gfx::RectToSkRect(content_rect));
-  canvas->scale(contents_scale, contents_scale);
-  canvas->translate(layer_rect_.x(), layer_rect_.y());
-  canvas->drawPicture(*picture_);
-  canvas->restore();
-}
-
-void Picture::GatherPixelRefs(const gfx::Rect& layer_rect,
-                              std::list<skia::LazyPixelRef*>& pixel_ref_list) {
-  DCHECK(picture_);
-  SkData* pixel_refs = SkPictureUtils::GatherPixelRefs(
-      picture_.get(), SkRect::MakeXYWH(layer_rect.x(),
-                                       layer_rect.y(),
-                                       layer_rect.width(),
-                                       layer_rect.height()));
-  if (!pixel_refs)
-    return;
-
-  void* data = const_cast<void*>(pixel_refs->data());
-  if (!data) {
-    pixel_refs->unref();
-    return;
-  }
-
-  SkPixelRef** refs = reinterpret_cast<SkPixelRef**>(data);
-  for (unsigned int i = 0; i < pixel_refs->size() / sizeof(SkPixelRef*); ++i) {
-    if (*refs && (*refs)->getURI() && !strncmp(
-        (*refs)->getURI(), labelLazyDecoded, 4)) {
-      pixel_ref_list.push_back(static_cast<skia::LazyPixelRef*>(*refs));
-    }
-    refs++;
-  }
-  pixel_refs->unref();
-}
-
-}  // namespace cc