[NOT FOR COMMIT] Fully replace SkCanvas uses.

skia/ext/cdl_canvas.cc

Index: skia/ext/cdl_canvas.cc
diff --git a/skia/ext/cdl_canvas.cc b/skia/ext/cdl_canvas.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4b5b81039104c8909d7f047787a68922e816c190
--- /dev/null
+++ b/skia/ext/cdl_canvas.cc
@@ -0,0 +1,636 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "cdl_canvas.h"
+
+#if CDL_ENABLED
+
+#include "base/memory/ptr_util.h"
+#include "cdl_no_draw_canvas.h"
+#include "cdl_paint.h"
+#include "cdl_picture.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkSurface.h"
+#include "third_party/skia/include/utils/SkNoDrawCanvas.h"
+#include "third_party/skia/include/utils/SkNWayCanvas.h"
+
+// TODO(cdl) LIST
+// SkRecordNoopSaveLayerDrawRestores
+
+#define RETURN_ON_NULL(ptr) \
+  do {                      \
+    if (nullptr == (ptr))   \
+      return;               \
+  } while (0)
+
+CdlNoDrawCanvas::CdlNoDrawCanvas(int width, int height)
+    : CdlCanvas(width, height) {}
+CdlNoDrawCanvas::~CdlNoDrawCanvas() {}
+
+sk_sp<CdlCanvas> CdlCanvas::Make(SkCanvas* canvas) {
+  return sk_sp<CdlCanvas>(new CdlCanvas(canvas));
+}
+
+CdlCanvas::CdlCanvas(SkCanvas* canvas) : canvas_(canvas) {}
+
+CdlCanvas::CdlCanvas(SkBaseDevice* device) {
+  owned_canvas_ = base::MakeUnique<SkCanvas>(device);
+  canvas_ = owned_canvas_.get();
+}
+
+CdlCanvas::CdlCanvas(const SkBitmap& bitmap) {
+  owned_canvas_ = base::MakeUnique<SkCanvas>(bitmap);
+  canvas_ = owned_canvas_.get();
+}
+
+CdlCanvas::CdlCanvas(const SkBitmap& bitmap, const SkSurfaceProps& props) {
+  owned_canvas_ = base::MakeUnique<SkCanvas>(bitmap, props);
+  canvas_ = owned_canvas_.get();
+}
+
+CdlCanvas::CdlCanvas(int width, int height)
+    : owned_canvas_(new SkNoDrawCanvas(width, height)),
+      canvas_(owned_canvas_.get()) {}
+
+CdlCanvas::~CdlCanvas() {}
+
+///////////////////////////////////////////////////////////////////////////////
+// Save / Restore
+int CdlCanvas::save() {
+  return this->onSave();
+}
+
+int CdlCanvas::onSave() {
+  return canvas_->save();
+}
+
+int CdlCanvas::saveLayer(const SkRect* bounds, const CdlPaint* paint) {
+  return this->saveLayer(SaveLayerRec(bounds, paint, 0));
+}
+
+int CdlCanvas::saveLayer(const SaveLayerRec& rec) {
+  return this->onSaveLayer(rec);
+}
+
+int CdlCanvas::onSaveLayer(const SaveLayerRec& rec) {
+  SkPaint sk_paint;
+  if (rec.fPaint)
+    sk_paint = rec.fPaint->toSkPaint();
+
+  SkCanvas::SaveLayerRec sk_rec(rec.fBounds, rec.fPaint ? &sk_paint : nullptr,
+                                rec.fBackdrop, rec.fSaveLayerFlags);
+  return canvas_->saveLayer(sk_rec);
+}
+
+int CdlCanvas::saveLayerAlpha(const SkRect* bounds, U8CPU alpha) {
+  if (0xFF == alpha) {
+    return this->saveLayer(bounds, nullptr);
+  } else {
+    CdlPaint tmpPaint;
+    tmpPaint.setAlpha(alpha);
+    return this->saveLayer(bounds, &tmpPaint);
+  }
+}
+
+int CdlCanvas::saveLayerPreserveLCDTextRequests(const SkRect* bounds,
+                                                const CdlPaint* paint) {
+  return this->saveLayer(
+      SaveLayerRec(bounds, paint, SkCanvas::kPreserveLCDText_SaveLayerFlag));
+}
+
+void CdlCanvas::restore() {
+  this->onRestore();
+}
+
+void CdlCanvas::onRestore() {
+  canvas_->restore();
+}
+
+int CdlCanvas::getSaveCount() const {
+  return canvas_->getSaveCount();
+}
+
+void CdlCanvas::restoreToCount(int count) {
+  // sanity check
+  if (count < 1) {
+    count = 1;
+  }
+
+  int n = this->getSaveCount() - count;
+  for (int i = 0; i < n; ++i) {
+    this->restore();
+  }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Transform
+void CdlCanvas::concat(const SkMatrix& matrix) {
+  if (matrix.isIdentity()) {
+    return;
+  }
+  this->onConcat(matrix);
+}
+
+void CdlCanvas::rotate(SkScalar degrees) {
+  SkMatrix m;
+  m.setRotate(degrees);
+  this->concat(m);
+}
+
+void CdlCanvas::scale(SkScalar sx, SkScalar sy) {
+  SkMatrix m;
+  m.setScale(sx, sy);
+  this->concat(m);
+}
+
+void CdlCanvas::translate(SkScalar dx, SkScalar dy) {
+  if (dx || dy) {
+    this->onTranslate(dx, dy);
+  }
+}
+
+void CdlCanvas::resetMatrix() {
+  this->onSetMatrix(SkMatrix::I());
+}
+
+void CdlCanvas::setMatrix(const SkMatrix& matrix) {
+  this->onSetMatrix(matrix);
+}
+
+const SkMatrix& CdlCanvas::getTotalMatrix() const {
+  return canvas_->getTotalMatrix();
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Clip
+SkISize CdlCanvas::getBaseLayerSize() const {
+  return canvas_->getBaseLayerSize();
+}
+
+bool CdlCanvas::getClipBounds(SkRect* bounds) const {
+  return canvas_->getClipBounds(bounds);
+}
+
+bool CdlCanvas::getClipDeviceBounds(SkIRect* bounds) const {
+  return canvas_->getClipDeviceBounds(bounds);
+}
+
+const SkClipStack* CdlCanvas::getClipStack() const {
+  return canvas_->getClipStack();
+}
+
+bool CdlCanvas::isClipEmpty() const {
+  return canvas_->isClipEmpty();
+}
+
+bool CdlCanvas::isClipRect() const {
+  return canvas_->isClipRect();
+}
+
+bool CdlCanvas::quickReject(const SkRect& src) const {
+  return canvas_->quickReject(src);
+}
+
+void CdlCanvas::clipRect(const SkRect& rect, SkCanvas::ClipOp op, bool doAA) {
+  ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle;
+  this->onClipRect(rect, op, edgeStyle);
+}
+
+void CdlCanvas::clipRRect(const SkRRect& rrect,
+                          SkCanvas::ClipOp op,
+                          bool doAA) {
+  ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle;
+  if (rrect.isRect()) {
+    this->onClipRect(rrect.getBounds(), op, edgeStyle);
+  } else {
+    this->onClipRRect(rrect, op, edgeStyle);
+  }
+}
+
+void CdlCanvas::clipPath(const SkPath& path, SkCanvas::ClipOp op, bool doAA) {
+  ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle;
+
+  if (!path.isInverseFillType() && canvas_->getTotalMatrix().rectStaysRect()) {
+    SkRect r;
+    if (path.isRect(&r)) {
+      this->onClipRect(r, op, edgeStyle);
+      return;
+    }
+    SkRRect rrect;
+    if (path.isOval(&r)) {
+      rrect.setOval(r);
+      this->onClipRRect(rrect, op, edgeStyle);
+      return;
+    }
+    if (path.isRRect(&rrect)) {
+      this->onClipRRect(rrect, op, edgeStyle);
+      return;
+    }
+  }
+
+  this->onClipPath(path, op, edgeStyle);
+}
+
+void CdlCanvas::clipRegion(const SkRegion& rgn, SkCanvas::ClipOp op) {
+  this->onClipRegion(rgn, op);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Draw
+void CdlCanvas::drawColor(SkColor color, SkBlendMode mode) {
+  CdlPaint paint;
+  paint.setColor(color);
+  paint.setBlendMode(mode);
+  this->drawPaint(paint);
+}
+
+void CdlCanvas::drawPaint(const CdlPaint& paint) {
+  this->onDrawPaint(paint);
+}
+
+void CdlCanvas::drawPoint(SkScalar x, SkScalar y, const CdlPaint& paint) {
+  SkPoint pt;
+
+  pt.set(x, y);
+  this->drawPoints(SkCanvas::kPoints_PointMode, 1, &pt, paint);
+}
+
+void CdlCanvas::drawPoint(SkScalar x, SkScalar y, SkColor color) {
+  SkPoint pt;
+  CdlPaint paint;
+
+  pt.set(x, y);
+  paint.setColor(color);
+  this->drawPoints(SkCanvas::kPoints_PointMode, 1, &pt, paint);
+}
+
+void CdlCanvas::drawPoints(SkCanvas::PointMode mode,
+                           size_t count,
+                           const SkPoint pts[],
+                           const CdlPaint& paint) {
+  this->onDrawPoints(mode, count, pts, paint);
+}
+
+void CdlCanvas::drawLine(SkScalar x0,
+                         SkScalar y0,
+                         SkScalar x1,
+                         SkScalar y1,
+                         const CdlPaint& paint) {
+  SkPoint pts[2];
+
+  pts[0].set(x0, y0);
+  pts[1].set(x1, y1);
+  this->drawPoints(SkCanvas::kLines_PointMode, 2, pts, paint);
+}
+
+void CdlCanvas::drawCircle(SkScalar cx,
+                           SkScalar cy,
+                           SkScalar radius,
+                           const CdlPaint& paint) {
+  if (radius < 0) {
+    radius = 0;
+  }
+
+  SkRect r;
+  r.set(cx - radius, cy - radius, cx + radius, cy + radius);
+  this->drawOval(r, paint);
+}
+
+void CdlCanvas::drawOval(const SkRect& r, const CdlPaint& paint) {
+  this->onDrawOval(r, paint);
+}
+
+void CdlCanvas::drawRect(const SkRect& r, const CdlPaint& paint) {
+  onDrawRect(r, paint);
+}
+
+void CdlCanvas::drawRoundRect(const SkRect& r,
+                              SkScalar rx,
+                              SkScalar ry,
+                              const CdlPaint& paint) {
+  if (rx > 0 && ry > 0) {
+    SkRRect rrect;
+    rrect.setRectXY(r, rx, ry);
+    this->drawRRect(rrect, paint);
+  } else {
+    this->drawRect(r, paint);
+  }
+}
+
+void CdlCanvas::drawRectCoords(SkScalar left,
+                               SkScalar top,
+                               SkScalar right,
+                               SkScalar bottom,
+                               const CdlPaint& paint) {
+  SkRect r;
+  r.set(left, top, right, bottom);
+  this->drawRect(r, paint);
+}
+
+void CdlCanvas::drawRRect(const SkRRect& rrect, const CdlPaint& paint) {
+  this->onDrawRRect(rrect, paint);
+}
+
+void CdlCanvas::drawDRRect(const SkRRect& outer,
+                           const SkRRect& inner,
+                           const CdlPaint& paint) {
+  if (outer.isEmpty()) {
+    return;
+  }
+  if (inner.isEmpty()) {
+    this->drawRRect(outer, paint);
+    return;
+  }
+
+  this->onDrawDRRect(outer, inner, paint);
+}
+
+void CdlCanvas::drawPath(const SkPath& path, const CdlPaint& paint) {
+  this->onDrawPath(path, paint);
+}
+
+void CdlCanvas::drawBitmap(const SkBitmap& bitmap,
+                           SkScalar dx,
+                           SkScalar dy,
+                           const CdlPaint* paint) {
+  if (bitmap.drawsNothing()) {
+    return;
+  }
+  this->onDrawImage(SkImage::MakeFromBitmap(bitmap).get(), dx, dy, paint);
+}
+
+void CdlCanvas::drawImage(const SkImage* image,
+                          SkScalar x,
+                          SkScalar y,
+                          const CdlPaint* paint) {
+  RETURN_ON_NULL(image);
+  this->onDrawImage(image, x, y, paint);
+}
+
+void CdlCanvas::drawImageRect(const SkImage* image,
+                              const SkRect& src,
+                              const SkRect& dst,
+                              const CdlPaint* paint,
+                              SkCanvas::SrcRectConstraint constraint) {
+  RETURN_ON_NULL(image);
+  if (dst.isEmpty() || src.isEmpty()) {
+    return;
+  }
+  this->onDrawImageRect(image, &src, dst, paint, constraint);
+}
+
+void CdlCanvas::drawImageRect(const SkImage* image,
+                              const SkRect& dst,
+                              const CdlPaint* paint,
+                              SkCanvas::SrcRectConstraint constraint) {
+  RETURN_ON_NULL(image);
+  this->drawImageRect(image, SkRect::MakeIWH(image->width(), image->height()),
+                      dst, paint, constraint);
+}
+
+void CdlCanvas::drawText(const void* text,
+                         size_t byteLength,
+                         SkScalar x,
+                         SkScalar y,
+                         const CdlPaint& paint) {
+  this->onDrawText(text, byteLength, x, y, paint);
+}
+
+void CdlCanvas::drawPosText(const void* text,
+                            size_t byteLength,
+                            const SkPoint pos[],
+                            const CdlPaint& paint) {
+  if (byteLength) {
+    this->onDrawPosText(text, byteLength, pos, paint);
+  }
+}
+
+void CdlCanvas::drawTextBlob(const SkTextBlob* blob,
+                             SkScalar x,
+                             SkScalar y,
+                             const CdlPaint& paint) {
+  RETURN_ON_NULL(blob);
+  this->onDrawTextBlob(blob, x, y, paint);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Misc
+void CdlCanvas::flush() {
+  canvas_->flush();
+}
+
+bool CdlCanvas::readPixels(SkBitmap* bitmap, int srcX, int srcY) {
+  return canvas_->readPixels(bitmap, srcX, srcY);
+}
+
+bool CdlCanvas::writePixels(const SkImageInfo& origInfo,
+                            const void* pixels,
+                            size_t rowBytes,
+                            int x,
+                            int y) {
+  return canvas_->writePixels(origInfo, pixels, rowBytes, x, y);
+}
+
+bool CdlCanvas::writePixels(const SkBitmap& bitmap, int x, int y) {
+  return canvas_->writePixels(bitmap, x, y);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Default pass-through implementation
+void CdlCanvas::onConcat(SkMatrix const& matrix) {
+  canvas_->concat(matrix);
+}
+
+void CdlCanvas::onSetMatrix(SkMatrix const& matrix) {
+  canvas_->setMatrix(matrix);
+}
+
+void CdlCanvas::onTranslate(float dx, float dy) {
+  canvas_->translate(dx, dy);
+}
+
+void CdlCanvas::onClipRect(SkRect const& r,
+                           SkRegion::Op op,
+                           CdlCanvas::ClipEdgeStyle style) {
+  canvas_->clipRect(r, op, style == kSoft_ClipEdgeStyle);
+}
+void CdlCanvas::onClipRRect(SkRRect const& r,
+                            SkRegion::Op op,
+                            CdlCanvas::ClipEdgeStyle style) {
+  canvas_->clipRRect(r, op, style == kSoft_ClipEdgeStyle);
+}
+void CdlCanvas::onClipPath(SkPath const& p,
+                           SkRegion::Op op,
+                           CdlCanvas::ClipEdgeStyle style) {
+  canvas_->clipPath(p, op, style == kSoft_ClipEdgeStyle);
+}
+void CdlCanvas::onClipRegion(SkRegion const& r, SkRegion::Op op) {
+  canvas_->clipRegion(r, op);
+}
+void CdlCanvas::onDiscard() {
+  canvas_->discard();
+}
+void CdlCanvas::onDrawPaint(CdlPaint const& paint) {
+  canvas_->drawPaint(paint.toSkPaint());
+}
+void CdlCanvas::onDrawPath(SkPath const& p, CdlPaint const& paint) {
+  canvas_->drawPath(p, paint.toSkPaint());
+}
+void CdlCanvas::onDrawRect(SkRect const& r, CdlPaint const& paint) {
+  canvas_->drawRect(r, paint.toSkPaint());
+}
+void CdlCanvas::onDrawOval(SkRect const& r, CdlPaint const& paint) {
+  canvas_->drawOval(r, paint.toSkPaint());
+}
+
+void CdlCanvas::onDrawRRect(SkRRect const& r, CdlPaint const& paint) {
+  canvas_->drawRRect(r, paint.toSkPaint());
+}
+void CdlCanvas::onDrawDRRect(const SkRRect& outer,
+                             const SkRRect& inner,
+                             const CdlPaint& paint) {
+  canvas_->drawDRRect(outer, inner, paint.toSkPaint());
+}
+
+void CdlCanvas::drawPicture(const CdlPicture* picture,
+                            const SkMatrix* matrix,
+                            const CdlPaint* paint) {
+  RETURN_ON_NULL(picture);
+
+  if (matrix && matrix->isIdentity()) {
+    matrix = nullptr;
+  }
+
+  this->onDrawPicture(picture, matrix, paint);
+}
+
+class CdlAutoCanvasMatrixPaint {
+ public:
+  CdlAutoCanvasMatrixPaint(CdlCanvas* canvas,
+                           const SkMatrix* matrix,
+                           const CdlPaint* paint,
+                           const SkRect& bounds)
+      : fCanvas(canvas), fSaveCount(canvas->getSaveCount()) {
+    if (paint) {
+      SkRect newBounds = bounds;
+      if (matrix) {
+        matrix->mapRect(&newBounds);
+      }
+      canvas->saveLayer(&newBounds, paint);
+    } else if (matrix) {
+      canvas->save();
+    }
+
+    if (matrix) {
+      canvas->concat(*matrix);
+    }
+  }
+
+  ~CdlAutoCanvasMatrixPaint() { fCanvas->restoreToCount(fSaveCount); }
+
+ private:
+  CdlCanvas* fCanvas;
+  int fSaveCount;
+};
+
+void CdlCanvas::onDrawPicture(const CdlPicture* picture,
+                              const SkMatrix* matrix,
+                              const CdlPaint* paint) {
+  if (!paint || paint->canComputeFastBounds()) {
+    SkRect bounds = picture->cullRect();
+
+    if (paint) {
+      paint->computeFastBounds(bounds, &bounds);
+    }
+    if (matrix) {
+      matrix->mapRect(&bounds);
+    }
+    if (this->quickReject(bounds)) {
+      return;
+    }
+  }
+
+  CdlAutoCanvasMatrixPaint acmp(this, matrix, paint, picture->cullRect());
+  picture->playback(this);
+}
+
+void CdlCanvas::onDrawAnnotation(SkRect const& r, char const* c, SkData* d) {
+  canvas_->drawAnnotation(r, c, d);
+}
+
+void CdlCanvas::onDrawText(const void* text,
+                           size_t byteLength,
+                           SkScalar x,
+                           SkScalar y,
+                           const CdlPaint& paint) {
+  canvas_->drawText(text, byteLength, x, y, paint.toSkPaint());
+}
+
+void CdlCanvas::onDrawPosText(const void* text,
+                              size_t byteLength,
+                              const SkPoint pos[],
+                              const CdlPaint& paint) {
+  canvas_->drawPosText(text, byteLength, pos, paint.toSkPaint());
+}
+
+void CdlCanvas::onDrawTextBlob(const SkTextBlob* blob,
+                               SkScalar x,
+                               SkScalar y,
+                               const CdlPaint& paint) {
+  canvas_->drawTextBlob(blob, x, y, paint.toSkPaint());
+}
+
+void CdlCanvas::onDrawImage(const SkImage* image,
+                            SkScalar x,
+                            SkScalar y,
+                            const CdlPaint* paint) {
+  SkPaint sk_paint;
+  if (paint)
+    sk_paint = paint->toSkPaint();
+  canvas_->drawImage(image, x, y, paint ? &sk_paint : nullptr);
+}
+
+void CdlCanvas::onDrawImageRect(const SkImage* image,
+                                const SkRect* src,
+                                const SkRect& dst,
+                                const CdlPaint* paint,
+                                SkCanvas::SrcRectConstraint constraint) {
+  SkPaint sk_paint;
+  if (paint)
+    sk_paint = paint->toSkPaint();
+  canvas_->drawImageRect(image, *src, dst, paint ? &sk_paint : nullptr,
+                         constraint);
+}
+
+void CdlCanvas::onDrawPoints(SkCanvas::PointMode mode,
+                             size_t count,
+                             const SkPoint pts[],
+                             const CdlPaint& paint) {
+  canvas_->drawPoints(mode, count, pts, paint.toSkPaint());
+}
+
+CdlPassThroughCanvas::CdlPassThroughCanvas(SkCanvas* canvas)
+    : CdlCanvas(canvas) {}
+CdlPassThroughCanvas::~CdlPassThroughCanvas() {}
+
+#else  // CDL_ENABLED
+
+#include "third_party/skia/include/utils/SkNWayCanvas.h"
+
+CdlPassThroughCanvas::CdlPassThroughCanvas(SkCanvas* canvas)
+    : SkNWayCanvas(canvas->getBaseLayerSize().width(),
+                   canvas->getBaseLayerSize().height()) {
+  SkIRect raster_bounds;
+  canvas->getClipDeviceBounds(&raster_bounds);
+  this->clipRect(SkRect::MakeFromIRect(raster_bounds));
+  this->setMatrix(canvas->getTotalMatrix());
+  this->addCanvas(canvas);
+}
+
+CdlPassThroughCanvas::~CdlPassThroughCanvas() {}
+
+#endif  // CDL_ENABLED