Paint low-res tiles without expensive filters.

skia/ext/paint_simplifier.cc

Index: skia/ext/paint_simplifier.cc
diff --git a/skia/ext/paint_simplifier.cc b/skia/ext/paint_simplifier.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6b697662458b10004099c3b4244fdb46345608c8
--- /dev/null
+++ b/skia/ext/paint_simplifier.cc
@@ -0,0 +1,41 @@
+// Copyright (c) 2013 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 "skia/ext/paint_simplifier.h"
+#include "third_party/skia/include/core/SkPaint.h"
+
+namespace skia {
+
+PaintSimplifier::PaintSimplifier()
+  : INHERITED() {
+
+}
+
+PaintSimplifier::~PaintSimplifier() {
+
+}
+
+bool PaintSimplifier::filter(SkPaint* paint, Type type) {
+
+  // Preserve a modicum of text quality; black & white text is
+  // just too blocky, even during a fling.
+  if (type != kText_Type) {
+    paint->setAntiAlias(false);
+  }
+  paint->setSubpixelText(false);
+  paint->setLCDRenderText(false);

[reed1, 2013/02/08 15:07:10]

Did no-lcd in fact help? In the abstract, it should blit faster but cause more
initial font-cache traffic, so I wasn't sure to recommend it blindly.

+
+  paint->setFilterBitmap(false);
+  paint->setMaskFilter(NULL);
+
+  // Uncomment this line to shade simplified tiles pink during debugging.
+  //paint->setColor(SkColorSetRGB(255, 127, 127));
+
+  return true;
+}
+
+
+}  // namespace skia
+
+