1 files changed, 161 insertions, 0 deletions
diff --git a/cc/resources/picture.cc b/cc/resources/picture.cc
new file mode 100644
index 0000000..52ae35e
--- /dev/null
+++ b/cc/resources/picture.cc
@@ -0,0 +1,161 @@
+// 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/resources/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