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 000000000..56e57aab4
--- /dev/null
+++ b/gfx/layers/composite/PaintCounter.cpp
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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 "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);
+  mStride = mSurface->Stride();
+
+  mCanvas.reset(
+    SkCanvas::NewRasterDirect(MakeSkiaImageInfo(mRect.Size(), mFormat),
+                              mSurface->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.setTextSize(32);
+  paint.setColor(SkColorSetRGB(0, 255, 0));
+  paint.setAntiAlias(true);
+
+  mCanvas->clear(SK_ColorTRANSPARENT);
+  mCanvas->drawText(buffer, strlen(buffer), 10, 30, 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