Implementation for cc::Picture::IsCheapInRect().

skia/ext/analysis_canvas.cc

 // 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 "base/debug/trace_event.h"
 #include "skia/ext/analysis_canvas.h"
+#include "third_party/skia/include/core/SkDevice.h"
+#include "third_party/skia/include/core/SkDraw.h"
+#include "third_party/skia/include/core/SkRRect.h"
+#include "ui/gfx/rect_conversions.h"
 
 namespace {
 
 // FIXME: Arbitrary number. Requires tuning & experimentation.
 // Probably requires per-platform tuning; N10 average draw call takes
 // 25x as long as Z620.
-int gPictureCostThreshold = 100;
+int gPictureCostThreshold = 1000;
 
 }
 
 namespace skia {
 
-AnalysisDevice::AnalysisDevice(const SkBitmap& bm) : SkDevice(bm) { }
+AnalysisDevice::AnalysisDevice(const SkBitmap& bm)
+  : SkDevice(bm)
+  , estimatedCost_(0) {
 
-AnalysisCanvas::AnalysisCanvas(SkDevice* device, SkRect clip)
-  : SkCanvas(device)
-  , estimatedCost_(0)
-  , clip_(clip) {
-  SkIRect ir;
-  clip.roundOut(&ir);
-  this->setClipRegion(SkRegion(ir));
 }
-  
+
+AnalysisDevice::~AnalysisDevice() {
+
+}
+
+int AnalysisDevice::getEstimatedCost() const {
+  return estimatedCost_;
+}
+
+void AnalysisDevice::clear(SkColor color) {
+    ++estimatedCost_;
+}
+
+void AnalysisDevice::drawPaint(const SkDraw&, const SkPaint& paint) {
+  ++estimatedCost_;
+}
+
+void AnalysisDevice::drawPoints(const SkDraw&, SkCanvas::PointMode mode,
+                          size_t count, const SkPoint[],
+                          const SkPaint& paint) {
+  ++estimatedCost_;
+}
+
+void AnalysisDevice::drawRect(const SkDraw&, const SkRect& r,
+                        const SkPaint& paint) {
+  // FIXME: if there's a pending image decode & resize, more expensive
+  ++estimatedCost_;
+}
+
+void AnalysisDevice::drawOval(const SkDraw&, const SkRect& oval,
+                        const SkPaint& paint) {
+  ++estimatedCost_;
+}
+
+void AnalysisDevice::drawPath(const SkDraw&, const SkPath& path,
+                        const SkPaint& paint,
+                        const SkMatrix* prePathMatrix ,
+                        bool pathIsMutable ) {
+  // On Z620, every antialiased path costs us about 300us.
+  // We've only seen this in practice on filled paths, but
+  // we expect it to apply to all path stroking modes.
+  if (paint.getMaskFilter()) {
+    estimatedCost_ += 300;
+  }
+  ++estimatedCost_;
+}
+
+void AnalysisDevice::drawBitmap(const SkDraw&, const SkBitmap& bitmap,
+                          const SkIRect* srcRectOrNull,
+                          const SkMatrix& matrix, const SkPaint& paint)
+                          {
+  ++estimatedCost_;
+}
+
+void AnalysisDevice::drawSprite(const SkDraw&, const SkBitmap& bitmap,
+                          int x, int y, const SkPaint& paint) {
+  ++estimatedCost_;
+}
+
+void AnalysisDevice::drawBitmapRect(const SkDraw&, const SkBitmap&,
+                              const SkRect* srcOrNull, const SkRect& dst,
+                              const SkPaint& paint) {
+  ++estimatedCost_;
+}
+
+
+void AnalysisDevice::drawText(const SkDraw&, const void* text, size_t len,
+                        SkScalar x, SkScalar y, const SkPaint& paint)
+                        {
+  ++estimatedCost_;
+}
+
+void AnalysisDevice::drawPosText(const SkDraw& draw, const void* text, size_t len,
+                           const SkScalar pos[], SkScalar constY,
+                           int scalarsPerPos, const SkPaint& paint) {
+  // FIXME: On Z620, every glyph cache miss costs us about 10us.
+  // We don't have a good mechanism for predicting glyph cache misses.
+  ++estimatedCost_;
+}
+
+void AnalysisDevice::drawTextOnPath(const SkDraw&, const void* text, size_t len,
+                              const SkPath& path, const SkMatrix* matrix,
+                              const SkPaint& paint) {
+  ++estimatedCost_;
+}
+
+#ifdef SK_BUILD_FOR_ANDROID
+void AnalysisDevice::drawPosTextOnPath(const SkDraw& draw, const void* text,
+                                 size_t len,
+                                 const SkPoint pos[], const SkPaint& paint,
+                                 const SkPath& path, const SkMatrix* matrix)
+                                 {
+  ++estimatedCost_;
+}
+#endif
+
+void AnalysisDevice::drawVertices(const SkDraw&, SkCanvas::VertexMode,
+                            int vertexCount,
+                            const SkPoint verts[], const SkPoint texs[],
+                            const SkColor colors[], SkXfermode* xmode,
+                            const uint16_t indices[], int indexCount,
+                            const SkPaint& paint) {
+  ++estimatedCost_;
+}
+
+void AnalysisDevice::drawDevice(const SkDraw&, SkDevice*, int x, int y,
+                          const SkPaint&) {
+  ++estimatedCost_;
+}
+
+
+AnalysisCanvas::AnalysisCanvas(AnalysisDevice* device)
+  : SkCanvas(device) {
+
+}
+
 AnalysisCanvas::~AnalysisCanvas() {
 
 }
 
-
-int AnalysisCanvas::save(SkCanvas::SaveFlags) {
-  ++estimatedCost_;
-}
-
-int AnalysisCanvas::saveLayer(const SkRect*, const SkPaint*, 
-                              SkCanvas::SaveFlags) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::restore() {
-  ++estimatedCost_;
-}
-
-bool AnalysisCanvas::clipRect(const SkRect&, SkRegion::Op, bool) {
-  ++estimatedCost_;
-}
-
-bool AnalysisCanvas::clipRRect(const SkRRect&, SkRegion::Op, bool) {
-  ++estimatedCost_;
-}
-
-bool AnalysisCanvas::clipPath(const SkPath&, SkRegion::Op, bool) {
-  ++estimatedCost_;
-}
-
-bool AnalysisCanvas::clipRegion(const SkRegion&, SkRegion::Op) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::clear(SkColor) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawPaint(const SkPaint&) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawPoints(PointMode, size_t, const SkPoint [],
-                                const SkPaint&) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawRect(const SkRect&, const SkPaint&) {
-// FIXME: if there's a pending image decode & resize, more expensive
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawOval(const SkRect&, const SkPaint&) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawRRect(const SkRRect&, const SkPaint&) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawPath(const SkPath& path, const SkPaint& paint) {
-char tmpbuf [256];
-sprintf(tmpbuf, "AnalysisCanvas::drawPath effect %s fill %s", paint.getPathEffect() ? "true" : "false", paint.getStyle() == SkPaint::kFill_Style ? "true" : "false");
-TRACE_EVENT0("skia", strdup(tmpbuf));
-  // if the path is filled, and there's a mask filter, more expensive
-  // FIXME: this isn't correctly detecting yet; no paths are taking
-  // the branch. See SkDraw::drawPath() for the code we're attempting
-  // to reproduce.
-  bool doFill = true;
-  if (paint.getPathEffect() || paint.getStyle() != SkPaint::kFill_Style) {
-TRACE_EVENT0("skia", "Checking fill path...");
-    SkPath tmpPath;
-    doFill = paint.getFillPath(path, &tmpPath, &clip_);
-  }
-  if (doFill && paint.getMaskFilter()) {
-TRACE_EVENT0("skia", "Found filled masked path; ouch!");
-    estimatedCost_ += 100;
-  }
-  if (!paint.getMaskFilter()) {
-TRACE_EVENT0("skia", "No mask filter.");
-  }
-  ++estimatedCost_;
-
-}
-
-void AnalysisCanvas::drawBitmap(const SkBitmap&, SkScalar, SkScalar,
-                                const SkPaint&) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawBitmapRectToRect(const SkBitmap&, const SkRect*,
-                                          const SkRect&, const SkPaint*) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawBitmapMatrix(const SkBitmap&, const SkMatrix&,
-                                      const SkPaint*) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawBitmapNine(const SkBitmap&, const SkIRect&,
-                                    const SkRect&, const SkPaint*) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawSprite(const SkBitmap&, int left, int top,
-                                const SkPaint*) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawText(const void*, size_t, SkScalar, SkScalar,
-                              const SkPaint&) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawPosText(const void*, size_t, const SkPoint [],
-                                 const SkPaint&) {
-// FIXME: sometimes very expensive
-//    NOT proportional to length: we see ~40B inputs taking 10-500 us
-//    The difference seems to be cache misses; every miss adds 10-30 us,
-// and we might see 8 misses in 52B and spend >200us drawing a string
-// immediately after drawing a 48B string in 2us (!) with no misses.
-// https://code.google.com/p/skia/issues/detail?id=1102
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawPosTextH(const void*, size_t, const SkScalar [],
-                                  SkScalar, const SkPaint&) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawTextOnPath(const void*, size_t, const SkPath&,
-                                    const SkMatrix*, const SkPaint&) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawVertices(VertexMode, int, const SkPoint [],
-                                  const SkPoint [], const SkColor [],
-                                  SkXfermode*,
-                                  const uint16_t [], int, const SkPaint&) {
-  ++estimatedCost_;
-}
-
-void AnalysisCanvas::drawData(const void*, size_t) {
-  ++estimatedCost_;
-}
-
 bool AnalysisCanvas::isCheap() const {
-  return estimatedCost_ < gPictureCostThreshold;
+  return getEstimatedCost() < gPictureCostThreshold;
 }
 
 int AnalysisCanvas::getEstimatedCost() const {
-  return estimatedCost_;
+  return ((AnalysisDevice*)getDevice())->getEstimatedCost();
 }
 
-
-void AnalysisCanvas::reset(SkRect clip) {
-  estimatedCost_ = 0;
-  clip_ = clip;
-  SkIRect ir;
-  clip.roundOut(&ir);
-  this->setClipRegion(SkRegion(ir));
+bool AnalysisCanvas::clipRect(const SkRect& rect, SkRegion::Op op,
+                        bool doAA) {
+  return SkCanvas::clipRect(rect, op, doAA);

[Justin Novosad, 2013/02/06 14:08:03]

Should use a typedef to refer to parent class.

[Tom Hudson, 2013/02/06 17:36:00]

I'd avoided it as an unChromey Skiaism, but
Done.

 }
 
+bool AnalysisCanvas::clipPath(const SkPath& path, SkRegion::Op op,
+                        bool doAA) {
+  return SkCanvas::clipPath(path, op, doAA);

[Justin Novosad, 2013/02/06 14:08:03]

To prevent complex clip rasterization in SkRasterClip, this should be:
return SkCanvas::clipRect(path.getBounds(), op, doAA);

[Tom Hudson, 2013/02/06 17:36:00]

Done.
(I assume we aren't worrying about inverse filled clips...)

+}
 
+bool AnalysisCanvas::clipRRect(const SkRRect& rrect, SkRegion::Op op,
+                         bool doAA) {
+  return SkCanvas::clipRect(rrect.getBounds(), op, doAA);
+}
 
+int AnalysisCanvas::saveLayer(const SkRect* bounds, const SkPaint*, 
+                              SkCanvas::SaveFlags flags) {
+  int count = SkCanvas::save(flags);
+  if (bounds) {
+    SkCanvas::clipRectBounds(bounds, flags, NULL);
+  }
+  return count;
+}
+
+  
 }  // namespace skia