Part 8 of cc/ directory shuffles: resources

Continuation of https://src.chromium.org/viewvc/chrome?view=rev&revision=188681

BUG=190824
TBR=enne@chromium.org, piman@chromium.org, jschuh@chromium.org

Review URL: https://codereview.chromium.org/12471007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@188696 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 73 insertions, 0 deletions

diff --git a/cc/resources/content_layer_updater.cc b/cc/resources/content_layer_updater.cc
new file mode 100644
index 0000000..b4eb1d2
--- /dev/null
+++ b/cc/resources/content_layer_updater.cc
@@ -0,0 +1,73 @@
+// Copyright 2011 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 "cc/resources/content_layer_updater.h"
+
+#include "base/debug/trace_event.h"
+#include "base/time.h"
+#include "cc/debug/rendering_stats.h"
+#include "cc/resources/layer_painter.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkPaint.h"
+#include "third_party/skia/include/core/SkRect.h"
+#include "third_party/skia/include/core/SkScalar.h"
+#include "ui/gfx/rect_conversions.h"
+#include "ui/gfx/rect_f.h"
+
+namespace cc {
+
+ContentLayerUpdater::ContentLayerUpdater(scoped_ptr<LayerPainter> painter)
+    : painter_(painter.Pass()) {}
+
+ContentLayerUpdater::~ContentLayerUpdater() {}
+
+void ContentLayerUpdater::PaintContents(SkCanvas* canvas,
+                                        gfx::Rect content_rect,
+                                        float contents_width_scale,
+                                        float contents_height_scale,
+                                        gfx::Rect* resulting_opaque_rect,
+                                        RenderingStats* stats) {
+  TRACE_EVENT0("cc", "ContentLayerUpdater::paintContents");
+  canvas->save();
+  canvas->translate(SkFloatToScalar(-content_rect.x()),
+                    SkFloatToScalar(-content_rect.y()));
+
+  gfx::Rect layer_rect = content_rect;
+
+  if (contents_width_scale != 1.f || contents_height_scale != 1.f) {
+    canvas->scale(SkFloatToScalar(contents_width_scale),
+                  SkFloatToScalar(contents_height_scale));
+
+    gfx::RectF rect = gfx::ScaleRect(
+        content_rect, 1.f / contents_width_scale, 1.f / contents_height_scale);
+    layer_rect = gfx::ToEnclosingRect(rect);
+  }
+
+  SkPaint paint;
+  paint.setAntiAlias(false);
+  paint.setXfermodeMode(SkXfermode::kClear_Mode);
+  SkRect layer_sk_rect = SkRect::MakeXYWH(
+      layer_rect.x(), layer_rect.y(), layer_rect.width(), layer_rect.height());
+  canvas->drawRect(layer_sk_rect, paint);
+  canvas->clipRect(layer_sk_rect);
+
+  gfx::RectF opaque_layer_rect;
+  base::TimeTicks paint_begin_time;
+  if (stats)
+    paint_begin_time = base::TimeTicks::Now();
+  painter_->Paint(canvas, layer_rect, &opaque_layer_rect);
+  if (stats) {
+    stats->totalPaintTime += base::TimeTicks::Now() - paint_begin_time;
+    stats->totalPixelsPainted += content_rect.width() * content_rect.height();
+  }
+  canvas->restore();
+
+  gfx::RectF opaque_content_rect = gfx::ScaleRect(
+      opaque_layer_rect, contents_width_scale, contents_height_scale);
+  *resulting_opaque_rect = gfx::ToEnclosedRect(opaque_content_rect);
+
+  content_rect_ = content_rect;
+}
+
+}  // namespace cc