Revert of Add initial implementation of GrShape and GrStyle classes and tests

src/gpu/GrShape.cpp

-/*
- * 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 "GrShape.h"
-
-GrShape& GrShape::operator=(const GrShape& that) {
-    bool wasPath = Type::kPath == fType;
-    fStyle = that.fStyle;
-    fType = that.fType;
-    switch (fType) {
-        case Type::kEmpty:
-            if (wasPath) {
-                fPath.reset();
-            }
-            break;
-        case Type::kRRect:
-            if (wasPath) {
-                fPath.reset();
-            }
-            fRRect = that.fRRect;
-            break;
-        case Type::kPath:
-            if (wasPath) {
-                *fPath.get() = *that.fPath.get();
-            } else {
-                fPath.set(*that.fPath.get());
-            }
-            break;
-    }
-    fInheritedKey.reset(that.fInheritedKey.count());
-    memcpy(fInheritedKey.get(), that.fInheritedKey.get(),
-           sizeof(uint32_t) * fInheritedKey.count());
-    return *this;
-}
-
-int GrShape::unstyledKeySize() const {
-    if (fInheritedKey.count()) {
-        return fInheritedKey.count();
-    }
-    switch (fType) {
-        case Type::kEmpty:
-            return 1;
-        case Type::kRRect:
-            SkASSERT(!fInheritedKey.count());
-            SkASSERT(0 == SkRRect::kSizeInMemory % sizeof(uint32_t));
-            return SkRRect::kSizeInMemory / sizeof(uint32_t);
-        case Type::kPath:
-            if (fPath.get()->isVolatile()) {
-                return -1;
-            } else {
-                return 1;
-            }
-    }
-    SkFAIL("Should never get here.");
-    return 0;
-}
-
-void GrShape::writeUnstyledKey(uint32_t* key) const {
-    SkASSERT(this->unstyledKeySize());
-    SkDEBUGCODE(uint32_t* origKey = key;)
-    if (fInheritedKey.count()) {
-        memcpy(key, fInheritedKey.get(), sizeof(uint32_t) * fInheritedKey.count());
-        SkDEBUGCODE(key += fInheritedKey.count();)
-    } else {
-        switch (fType) {
-            case Type::kEmpty:
-                *key++ = 1;
-                break;
-            case Type::kRRect:
-                fRRect.writeToMemory(key);
-                key += SkRRect::kSizeInMemory / sizeof(uint32_t);
-                break;
-            case Type::kPath:
-                SkASSERT(!fPath.get()->isVolatile());
-                *key++ = fPath.get()->getGenerationID();
-                break;
-        }
-    }
-    SkASSERT(key - origKey == this->unstyledKeySize());
-}
-
-int GrShape::StyleKeySize(const GrStyle& style, bool stopAfterPE) {
-    GR_STATIC_ASSERT(sizeof(uint32_t) == sizeof(SkScalar));
-    int size = 0;
-    if (style.isDashed()) {
-        // One scalar for dash phase and one for each dash value.
-        size += 1 + style.dashIntervalCnt();
-    } else if (style.pathEffect()) {
-        // No key for a generic path effect.
-        return -1;
-    }
-
-    if (stopAfterPE) {
-        return size;
-    }
-
-    if (style.strokeRec().needToApply()) {
-        // One for style/cap/join, 2 for miter and width.
-        size += 3;
-    }
-    return size;
-}
-
-void GrShape::StyleKey(uint32_t* key, const GrStyle& style, bool stopAfterPE) {
-    SkASSERT(key);
-    SkASSERT(StyleKeySize(style, stopAfterPE) >= 0);
-    GR_STATIC_ASSERT(sizeof(uint32_t) == sizeof(SkScalar));
-
-    int i = 0;
-    if (style.isDashed()) {
-        GR_STATIC_ASSERT(sizeof(style.dashPhase()) == sizeof(uint32_t));
-        SkScalar phase = style.dashPhase();
-        memcpy(&key[i++], &phase, sizeof(SkScalar));
-
-        int32_t count = style.dashIntervalCnt();
-        // Dash count should always be even.
-        SkASSERT(0 == (count & 0x1));
-        const SkScalar* intervals = style.dashIntervals();
-        int intervalByteCnt = count * sizeof(SkScalar);
-        memcpy(&key[i], intervals, intervalByteCnt);
-        SkDEBUGCODE(i += count);
-    } else {
-        SkASSERT(!style.pathEffect());
-    }
-
-    if (!stopAfterPE && style.strokeRec().needToApply()) {
-        enum {
-            kStyleBits = 2,
-            kJoinBits = 2,
-            kCapBits = 32 - kStyleBits - kJoinBits,
-
-            kJoinShift = kStyleBits,
-            kCapShift = kJoinShift + kJoinBits,
-        };
-        GR_STATIC_ASSERT(SkStrokeRec::kStyleCount <= (1 << kStyleBits));
-        GR_STATIC_ASSERT(SkPaint::kJoinCount <= (1 << kJoinBits));
-        GR_STATIC_ASSERT(SkPaint::kCapCount <= (1 << kCapBits));
-        key[i++]  = style.strokeRec().getStyle() |
-                    style.strokeRec().getJoin() << kJoinShift |
-                    style.strokeRec().getCap() << kCapShift;
-
-        SkScalar scalar;
-        // Miter limit only affects miter joins
-        scalar = SkPaint::kMiter_Join == style.strokeRec().getJoin()
-                 ? style.strokeRec().getMiter()
-                 : -1.f;
-        memcpy(&key[i++], &scalar, sizeof(scalar));
-
-        scalar = style.strokeRec().getWidth();
-        memcpy(&key[i++], &scalar, sizeof(scalar));
-    }
-    SkASSERT(StyleKeySize(style, stopAfterPE) == i);
-}
-
-void GrShape::setInheritedKey(const GrShape &parent, bool stopAfterPE){
-    SkASSERT(!fInheritedKey.count());
-    // If the output shape turns out to be simple, then we will just use its geometric key
-    if (Type::kPath == fType) {
-        // We want ApplyFullStyle(ApplyPathEffect(shape)) to have the same key as
-        // ApplyFullStyle(shape).
-        // The full key is structured as (geo,path_effect,stroke).
-        // If we do ApplyPathEffect we get get,path_effect as the inherited key. If we then
-        // do ApplyFullStyle we'll memcpy geo,path_effect into the new inherited key
-        // and then append the style key (which should now be stroke only) at the end.
-        int parentCnt = parent.fInheritedKey.count();
-        bool useParentGeoKey = !parentCnt;
-        if (useParentGeoKey) {
-            parentCnt = parent.unstyledKeySize();
-        }
-        int styleCnt = StyleKeySize(parent.fStyle, stopAfterPE);
-        if (styleCnt < 0) {
-            // The style doesn't allow a key, set the path to volatile so that we fail when
-            // we try to get a key for the shape.
-            fPath.get()->setIsVolatile(true);
-        } else {
-            fInheritedKey.reset(parentCnt + styleCnt);
-            if (useParentGeoKey) {
-                // This will be the geo key.
-                parent.writeUnstyledKey(fInheritedKey.get());
-            } else {
-                // This should be geo,path_effect
-                memcpy(fInheritedKey.get(), parent.fInheritedKey.get(),
-                       parentCnt * sizeof(uint32_t));
-            }
-            // Now turn (geo,path_effect) or (geo) into (geo,path_effect,stroke)
-            StyleKey(fInheritedKey.get() + parentCnt, parent.fStyle, stopAfterPE);
-        }
-    }
-}
-
-GrShape::GrShape(const GrShape& that) : fType(that.fType), fStyle(that.fStyle) {
-    switch (fType) {
-        case Type::kEmpty:
-            return;
-        case Type::kRRect:
-            fRRect = that.fRRect;
-            return;
-        case Type::kPath:
-            fPath.set(*that.fPath.get());
-            return;
-    }
-    fInheritedKey.reset(that.fInheritedKey.count());
-    memcpy(fInheritedKey.get(), that.fInheritedKey.get(),
-           sizeof(uint32_t) * fInheritedKey.count());
-}
-
-GrShape::GrShape(const GrShape& parent, bool stopAfterPE) {
-    fType = Type::kEmpty;
-    SkPathEffect* pe = parent.fStyle.pathEffect();
-    const SkPath* inPath;
-    SkStrokeRec strokeRec = parent.fStyle.strokeRec();
-    if (pe) {
-        fType = Type::kPath;
-        fPath.init();
-        if (parent.fType == Type::kPath) {
-            inPath = parent.fPath.get();
-        } else {
-            inPath = fPath.get();
-            parent.asPath(fPath.get());
-        }
-        // Should we consider bounds? Would have to include in key, but it'd be nice to know
-        // if the bounds actually modified anything before including in key.
-        if (!pe->filterPath(fPath.get(), *inPath, &strokeRec, nullptr)) {
-            // Make an empty unstyled shape if filtering fails.
-            fType = Type::kEmpty;
-            fStyle = GrStyle();
-            fPath.reset();
-            return;
-        }
-        inPath = fPath.get();
-    } else if (stopAfterPE || !strokeRec.needToApply()) {
-        *this = parent;
-        return;
-    } else {
-        fType = Type::kPath;
-        fPath.init();
-        if (parent.fType == Type::kPath) {
-            inPath = parent.fPath.get();
-        } else {
-            inPath = fPath.get();
-            parent.asPath(fPath.get());
-        }
-    }
-    if (!stopAfterPE) {
-        strokeRec.applyToPath(fPath.get(), *inPath);
-    } else {
-        fStyle = GrStyle(strokeRec, nullptr);
-    }
-    this->setInheritedKey(parent, stopAfterPE);
-}