Revert of Sketch splitting SkPicture into an interface and SkBigPicture.

src/core/SkPictureCommon.h

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-// Some shared code used by both SkBigPicture and SkMiniPicture.
-//   SkTextHunter   -- SkRecord visitor that returns true when the op draws text.
-//   SkBitmapHunter -- SkRecord visitor that returns true when the op draws a bitmap.
-//   SkPathCounter  -- SkRecord visitor that counts paths that draw slowly on the GPU.
-
-#include "SkPathEffect.h"
-#include "SkRecords.h"
-#include "SkTLogic.h"
-
-struct SkTextHunter {
-    // Most ops never have text.  Some always do.  Subpictures know themeselves.
-    template <typename T> bool operator()(const T&) { return false; }
-    bool operator()(const SkRecords::DrawPosText&)    { return true; }
-    bool operator()(const SkRecords::DrawPosTextH&)   { return true; }
-    bool operator()(const SkRecords::DrawText&)       { return true; }
-    bool operator()(const SkRecords::DrawTextBlob&)   { return true; }
-    bool operator()(const SkRecords::DrawTextOnPath&) { return true; }
-    bool operator()(const SkRecords::DrawPicture& op) { return op.picture->hasText(); }
-};
-
-
-struct SkBitmapHunter {
-    // Helpers.  These create HasMember_bitmap and HasMember_paint.
-    SK_CREATE_MEMBER_DETECTOR(bitmap);
-    SK_CREATE_MEMBER_DETECTOR(paint);
-
-    // Some ops have a paint, some have an optional paint.  Either way, get back a pointer.
-    static const SkPaint* AsPtr(const SkPaint& p) { return &p; }
-    static const SkPaint* AsPtr(const SkRecords::Optional<SkPaint>& p) { return p; }
-
-    // Main entry for visitor:
-    // If the op is a DrawPicture, recurse.
-    // If the op has a bitmap directly, return true.
-    // If the op has a paint and the paint has a bitmap, return true.
-    // Otherwise, return false.
-    bool operator()(const SkRecords::DrawPicture& op) { return op.picture->willPlayBackBitmaps(); }
-
-    template <typename T>
-    bool operator()(const T& r) { return CheckBitmap(r); }
-
-    // If the op has a bitmap, of course we're going to play back bitmaps.
-    template <typename T>
-    static SK_WHEN(HasMember_bitmap<T>, bool) CheckBitmap(const T&) { return true; }
-
-    // If not, look for one in its paint (if it has a paint).
-    template <typename T>
-    static SK_WHEN(!HasMember_bitmap<T>, bool) CheckBitmap(const T& r) { return CheckPaint(r); }
-
-    // If we have a paint, dig down into the effects looking for a bitmap.
-    template <typename T>
-    static SK_WHEN(HasMember_paint<T>, bool) CheckPaint(const T& r) {
-        const SkPaint* paint = AsPtr(r.paint);
-        if (paint) {
-            const SkShader* shader = paint->getShader();
-            if (shader &&
-                shader->asABitmap(nullptr, nullptr, nullptr) == SkShader::kDefault_BitmapType) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    // If we don't have a paint, that non-paint has no bitmap.
-    template <typename T>
-    static SK_WHEN(!HasMember_paint<T>, bool) CheckPaint(const T&) { return false; }
-};
-
-// TODO: might be nicer to have operator() return an int (the number of slow paths) ?
-struct SkPathCounter {
-    SK_CREATE_MEMBER_DETECTOR(paint);
-
-    // Some ops have a paint, some have an optional paint.  Either way, get back a pointer.
-    static const SkPaint* AsPtr(const SkPaint& p) { return &p; }
-    static const SkPaint* AsPtr(const SkRecords::Optional<SkPaint>& p) { return p; }
-
-    SkPathCounter() : fNumSlowPathsAndDashEffects(0) {}
-
-    // Recurse into nested pictures.
-    void operator()(const SkRecords::DrawPicture& op) {
-        fNumSlowPathsAndDashEffects += op.picture->numSlowPaths();
-    }
-
-    void checkPaint(const SkPaint* paint) {
-        if (paint && paint->getPathEffect()) {
-            // Initially assume it's slow.
-            fNumSlowPathsAndDashEffects++;
-        }
-    }
-
-    void operator()(const SkRecords::DrawPoints& op) {
-        this->checkPaint(&op.paint);
-        const SkPathEffect* effect = op.paint.getPathEffect();
-        if (effect) {
-            SkPathEffect::DashInfo info;
-            SkPathEffect::DashType dashType = effect->asADash(&info);
-            if (2 == op.count && SkPaint::kRound_Cap != op.paint.getStrokeCap() &&
-                SkPathEffect::kDash_DashType == dashType && 2 == info.fCount) {
-                fNumSlowPathsAndDashEffects--;
-            }
-        }
-    }
-
-    void operator()(const SkRecords::DrawPath& op) {
-        this->checkPaint(&op.paint);
-        if (op.paint.isAntiAlias() && !op.path.isConvex()) {
-            SkPaint::Style paintStyle = op.paint.getStyle();
-            const SkRect& pathBounds = op.path.getBounds();
-            if (SkPaint::kStroke_Style == paintStyle &&
-                0 == op.paint.getStrokeWidth()) {
-                // AA hairline concave path is not slow.
-            } else if (SkPaint::kFill_Style == paintStyle && pathBounds.width() < 64.f &&
-                       pathBounds.height() < 64.f && !op.path.isVolatile()) {
-                // AADF eligible concave path is not slow.
-            } else {
-                fNumSlowPathsAndDashEffects++;
-            }
-        }
-    }
-
-    template <typename T>
-    SK_WHEN(HasMember_paint<T>, void) operator()(const T& op) {
-        this->checkPaint(AsPtr(op.paint));
-    }
-
-    template <typename T>
-    SK_WHEN(!HasMember_paint<T>, void) operator()(const T& op) { /* do nothing */ }
-
-    int fNumSlowPathsAndDashEffects;
-};