1 files changed, 79 insertions, 0 deletions
diff --git a/gfx/layers/composite/PaintCounter.cpp b/gfx/layers/composite/PaintCounter.cpp
new file mode 100644
index 0000000000..fbf1552116
--- /dev/null
+++ b/gfx/layers/composite/PaintCounter.cpp
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/gfx/Point.h"          // for IntSize, Point
+#include "mozilla/gfx/Rect.h"           // for Rect
+#include "mozilla/gfx/Types.h"          // for Color, SurfaceFormat
+#include "mozilla/layers/Compositor.h"  // for Compositor
+#include "mozilla/layers/CompositorTypes.h"
+#include "mozilla/layers/Effects.h"  // for Effect, EffectChain, etc
+#include "mozilla/TimeStamp.h"       // for TimeStamp, TimeDuration
+#include "mozilla/Sprintf.h"
+
+#include "mozilla/gfx/HelpersSkia.h"
+#include "skia/include/core/SkFont.h"
+#include "PaintCounter.h"
+
+namespace mozilla {
+namespace layers {
+
+using namespace mozilla::gfx;
+
+// Positioned below the chrome UI
+IntRect PaintCounter::mRect = IntRect(0, 175, 300, 60);
+
+PaintCounter::PaintCounter() {
+  mFormat = SurfaceFormat::B8G8R8A8;
+  mSurface = Factory::CreateDataSourceSurface(mRect.Size(), mFormat);
+  mMap.emplace(mSurface, DataSourceSurface::READ_WRITE);
+  mStride = mMap->GetStride();
+
+  mCanvas = SkCanvas::MakeRasterDirect(MakeSkiaImageInfo(mRect.Size(), mFormat),
+                                       mMap->GetData(), mStride);
+  mCanvas->clear(SK_ColorWHITE);
+}
+
+PaintCounter::~PaintCounter() {
+  mSurface = nullptr;
+  mTextureSource = nullptr;
+  mTexturedEffect = nullptr;
+}
+
+void PaintCounter::Draw(Compositor* aCompositor, TimeDuration aPaintTime,
+                        TimeDuration aCompositeTime) {
+  char buffer[48];
+  SprintfLiteral(buffer, "P: %.2f  C: %.2f", aPaintTime.ToMilliseconds(),
+                 aCompositeTime.ToMilliseconds());
+
+  SkPaint paint;
+  paint.setColor(SkColorSetRGB(0, 255, 0));
+  paint.setAntiAlias(true);
+
+  SkFont font(SkTypeface::MakeDefault(), 32);
+
+  mCanvas->clear(SK_ColorTRANSPARENT);
+  mCanvas->drawString(buffer, 10, 30, font, paint);
+  mCanvas->flush();
+
+  if (!mTextureSource) {
+    mTextureSource = aCompositor->CreateDataTextureSource();
+    mTexturedEffect = CreateTexturedEffect(mFormat, mTextureSource,
+                                           SamplingFilter::POINT, true);
+    mTexturedEffect->mTextureCoords = Rect(0, 0, 1.0f, 1.0f);
+  }
+
+  mTextureSource->Update(mSurface);
+
+  EffectChain effectChain;
+  effectChain.mPrimaryEffect = mTexturedEffect;
+
+  gfx::Matrix4x4 identity;
+  Rect rect(mRect.X(), mRect.Y(), mRect.Width(), mRect.Height());
+  aCompositor->DrawQuad(rect, mRect, effectChain, 1.0, identity);
+}
+
+}  // end namespace layers
+}  // end namespace mozilla