Revert of Sketch splitting SkPicture into an interface and SkBigPicture.

src/core/SkMiniRecorder.cpp

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkCanvas.h"
-#include "SkLazyPtr.h"
-#include "SkMiniRecorder.h"
-#include "SkPicture.h"
-#include "SkPictureCommon.h"
-#include "SkRecordDraw.h"
-#include "SkTextBlob.h"
-
-using namespace SkRecords;
-
-class SkEmptyPicture final : public SkPicture {
-public:
-    void playback(SkCanvas*, AbortCallback*) const override { }
-
-    size_t approximateBytesUsed() const override { return sizeof(*this); }
-    int    approximateOpCount()   const override { return 0; }
-    SkRect cullRect()             const override { return SkRect::MakeEmpty(); }
-    bool   hasText()              const override { return false; }
-    int    numSlowPaths()         const override { return 0; }
-    bool   willPlayBackBitmaps()  const override { return false; }
-    bool   suitableForGpuRasterization(GrContext*, const char**) const override { return true; }
-};
-SK_DECLARE_STATIC_LAZY_PTR(SkEmptyPicture, gEmptyPicture);
-
-template <typename T>
-class SkMiniPicture final : public SkPicture {
-public:
-    SkMiniPicture(SkRect cull, T* op) : fCull(cull) {
-        memcpy(&fOp, op, sizeof(fOp));  // We take ownership of op's guts.
-    }
-
-    void playback(SkCanvas* c, AbortCallback*) const override {
-        SkRecords::Draw(c, nullptr, nullptr, 0, nullptr)(fOp);
-    }
-
-    size_t approximateBytesUsed() const override { return sizeof(*this); }
-    int    approximateOpCount()   const override { return 1; }
-    SkRect cullRect()             const override { return fCull; }
-    bool   hasText()              const override { return SkTextHunter()(fOp); }
-    bool   willPlayBackBitmaps()  const override { return SkBitmapHunter()(fOp); }
-
-    // TODO: These trivial implementations are not all correct for all types.
-    // But I suspect these will never be called on SkMiniPictures, so assert for now.
-    int    numSlowPaths()         const override { SkASSERT(false); return 0; }
-    bool   suitableForGpuRasterization(GrContext*, const char**) const override {
-        SkASSERT(false);
-        return true;
-    }
-
-private:
-    SkRect fCull;
-    T      fOp;
-};
-
-
-SkMiniRecorder::SkMiniRecorder() : fState(State::kEmpty) {}
-SkMiniRecorder::~SkMiniRecorder() {
-    // We've done something wrong if no one's called detachAsPicture().
-    SkASSERT(fState == State::kEmpty);
-}
-
-#define TRY_TO_STORE(Type, ...)                    \
-    if (fState != State::kEmpty) { return false; } \
-    fState = State::k##Type;                       \
-    new (fBuffer.get()) Type(__VA_ARGS__);         \
-    return true
-
-bool SkMiniRecorder::drawRect(const SkRect& rect, const SkPaint& paint) {
-    TRY_TO_STORE(DrawRect, paint, rect);
-}
-
-bool SkMiniRecorder::drawPath(const SkPath& path, const SkPaint& paint) {
-    TRY_TO_STORE(DrawPath, paint, path);
-}
-
-bool SkMiniRecorder::drawTextBlob(const SkTextBlob* b, SkScalar x, SkScalar y, const SkPaint& p) {
-    TRY_TO_STORE(DrawTextBlob, p, b, x, y);
-}
-#undef TRY_TO_STORE
-
-#define CASE(Type)               \
-    case State::k##Type:         \
-        fState = State::kEmpty;  \
-        return SkNEW_ARGS(SkMiniPicture<Type>, (cull, reinterpret_cast<Type*>(fBuffer.get())))
-
-SkPicture* SkMiniRecorder::detachAsPicture(const SkRect& cull) {
-    switch (fState) {
-        case State::kEmpty: return SkRef(gEmptyPicture.get());
-        CASE(DrawPath);
-        CASE(DrawRect);
-        CASE(DrawTextBlob);
-    }
-    SkASSERT(false);
-    return NULL;
-}
-#undef CASE