Revert of Replace GrStrokeInfo with GrStyle.

src/gpu/GrStrokeInfo.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrStrokeInfo_DEFINED
+#define GrStrokeInfo_DEFINED
+
+#include "SkPathEffect.h"
+#include "SkStrokeRec.h"
+#include "SkTemplates.h"
+
+class GrUniqueKey;
+
+/*
+ * GrStrokeInfo encapsulates all the pertinent infomation regarding the stroke. The SkStrokeRec
+ * which holds information on fill style, width, miter, cap, and join. It also holds information
+ * about the dash like intervals, count, and phase.
+ */
+class GrStrokeInfo : public SkStrokeRec {
+public:
+    static const GrStrokeInfo& FillInfo() {
+        static const GrStrokeInfo gFill(kFill_InitStyle);
+        return gFill;
+    }
+
+    GrStrokeInfo(SkStrokeRec::InitStyle style)
+        : INHERITED(style)
+        , fDashType(SkPathEffect::kNone_DashType) {
+    }
+
+    GrStrokeInfo(const GrStrokeInfo& src, bool includeDash = true)
+        : INHERITED(src) {
+        if (includeDash && src.isDashed()) {
+            fDashType = src.fDashType;
+            fDashPhase = src.fDashPhase;
+            fIntervals.reset(src.getDashCount());
+            memcpy(fIntervals.get(), src.fIntervals.get(), fIntervals.count() * sizeof(SkScalar));
+        } else {
+            fDashType = SkPathEffect::kNone_DashType;
+        }
+    }
+
+    GrStrokeInfo(const SkPaint& paint, SkPaint::Style styleOverride)
+        : INHERITED(paint, styleOverride)
+        , fDashType(SkPathEffect::kNone_DashType) {
+        this->init(paint);
+    }
+
+    explicit GrStrokeInfo(const SkPaint& paint)
+        : INHERITED(paint)
+        , fDashType(SkPathEffect::kNone_DashType) {
+        this->init(paint);
+    }
+
+    GrStrokeInfo& operator=(const GrStrokeInfo& other) {
+        if (other.isDashed()) {
+            fDashType = other.fDashType;
+            fDashPhase = other.fDashPhase;
+            fIntervals.reset(other.getDashCount());
+            memcpy(fIntervals.get(), other.fIntervals.get(), fIntervals.count() * sizeof(SkScalar));
+        } else {
+            this->removeDash();
+        }
+        this->INHERITED::operator=(other);
+        return *this;
+    }
+
+    bool hasEqualEffect(const GrStrokeInfo& other) const {
+        if (this->isDashed() != other.isDashed()) {
+            return false;
+        }
+        if (this->isDashed()) {
+            if (fDashPhase != other.fDashPhase ||
+                fIntervals.count() != other.fIntervals.count() ||
+                memcmp(fIntervals.get(), other.fIntervals.get(),
+                       fIntervals.count() * sizeof(SkScalar)) != 0) {
+                return false;
+            }
+        }
+        return this->INHERITED::hasEqualEffect(other);
+    }
+
+    /*
+     * This functions takes in a patheffect and updates the dashing information if the path effect
+     * is a Dash type. Returns true if the path effect is a dashed effect and we are stroking,
+     * otherwise it returns false.
+     */
+    bool setDashInfo(const SkPathEffect* pe) {
+        if (pe && !this->isFillStyle()) {
+            SkPathEffect::DashInfo dashInfo;
+            fDashType = pe->asADash(&dashInfo);
+            if (SkPathEffect::kDash_DashType == fDashType) {
+                fIntervals.reset(dashInfo.fCount);
+                dashInfo.fIntervals = fIntervals.get();
+                pe->asADash(&dashInfo);
+                fDashPhase = dashInfo.fPhase;
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /*
+     * Like the above, but sets with an explicit SkPathEffect::DashInfo
+     */
+    bool setDashInfo(const SkPathEffect::DashInfo& info) {
+        if (!this->isFillStyle()) {
+            fDashType = SkPathEffect::kDash_DashType;
+            fDashPhase = info.fPhase;
+            fIntervals.reset(info.fCount);
+            for (int i = 0; i < fIntervals.count(); i++) {
+                fIntervals[i] = info.fIntervals[i];
+            }
+            return true;
+        }
+        return false;
+    }
+
+    bool isDashed() const {
+        return (!this->isFillStyle() && SkPathEffect::kDash_DashType == fDashType);
+    }
+
+    int32_t getDashCount() const {
+        SkASSERT(this->isDashed());
+        return fIntervals.count();
+    }
+
+    SkScalar getDashPhase() const {
+        SkASSERT(this->isDashed());
+        return fDashPhase;
+    }
+
+    const SkScalar* getDashIntervals() const {
+        SkASSERT(this->isDashed());
+        return fIntervals.get();
+    }
+
+    void removeDash() {
+        fDashType = SkPathEffect::kNone_DashType;
+    }
+
+    /** Applies the dash to a path, if the stroke info has dashing.
+     * @return true if the dashing was applied (dst and dstStrokeInfo will be modified).
+     *         false if the stroke info did not have dashing. The dst and dstStrokeInfo
+     *               will be unmodified. The stroking in the SkStrokeRec might still
+     *               be applicable.
+     */
+    bool applyDashToPath(SkPath* dst, GrStrokeInfo* dstStrokeInfo, const SkPath& src) const;
+
+    /**
+     * Computes the length of the data that will be written by asUniqueKeyFragment() function.
+     */
+    int computeUniqueKeyFragmentData32Cnt() const {
+        const int kSkScalarData32Cnt = sizeof(SkScalar) / sizeof(uint32_t);
+        // SkStrokeRec data: 32 bits for style+join+cap and 2 scalars for miter and width.
+        int strokeKeyData32Cnt = 1 + 2 * kSkScalarData32Cnt;
+
+        if (this->isDashed()) {
+            // One scalar for dash phase and one for each dash value.
+            strokeKeyData32Cnt += (1 + this->getDashCount()) * kSkScalarData32Cnt;
+        }
+        return strokeKeyData32Cnt;
+    }
+
+    /**
+     * Writes the object contents as uint32_t data, to be used with GrUniqueKey.
+     * Note: the data written does not encode the length, so care must be taken to ensure
+     * that the full unique key data is encoded properly. For example, GrStrokeInfo
+     * fragment can be placed last in the sequence, at fixed index.
+     */
+    void asUniqueKeyFragment(uint32_t*) const;
+
+private:
+    // Prevent accidental usage, should use GrStrokeInfo::hasEqualEffect.
+    bool hasEqualEffect(const SkStrokeRec& other) const;
+
+    void init(const SkPaint& paint) {
+        const SkPathEffect* pe = paint.getPathEffect();
+        this->setDashInfo(pe);
+    }
+
+    SkPathEffect::DashType fDashType;
+    SkScalar               fDashPhase;
+    SkAutoSTArray<2, SkScalar> fIntervals;
+    typedef SkStrokeRec INHERITED;
+};
+
+#endif