Revert of Separate user and raw stencil settings

src/gpu/GrStencilSettings.h

-/*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef GrStencilSettings_DEFINED
-#define GrStencilSettings_DEFINED
-
-#include "GrUserStencilSettings.h"
-#include "SkRegion.h"
-
-class GrProcessorKeyBuilder;
-
-enum class GrStencilTest : uint16_t {
-    kAlways,
-    kNever,
-    kGreater,
-    kGEqual,
-    kLess,
-    kLEqual,
-    kEqual,
-    kNotEqual
-};
-static constexpr int kGrStencilTestCount = 1 + (int)GrStencilTest::kNotEqual;
-
-enum class GrStencilOp : uint8_t {
-    kKeep,
-    kZero,
-    kReplace, // Replace stencil value with fRef (only the bits enabled in fWriteMask).
-    kInvert,
-    kIncWrap,
-    kDecWrap,
-    // NOTE: clamping occurs before the write mask. So if the MSB is zero and masked out, stencil
-    // values will still wrap when using clamping ops.
-    kIncClamp,
-    kDecClamp
-};
-static constexpr int kGrStencilOpCount = 1 + (int)GrStencilOp::kDecClamp;
-
-/**
- * This class defines concrete stencil settings that map directly to the underlying hardware. It
- * is deduced from user stencil settings, stencil clip status, and the number of bits in the
- * target stencil buffer.
- */
-class GrStencilSettings {
-public:
-    GrStencilSettings() { this->setDisabled(); }
-    GrStencilSettings(const GrUserStencilSettings& user, bool hasStencilClip, int numStencilBits) {
-        this->reset(user, hasStencilClip, numStencilBits);
-    }
-    GrStencilSettings(const GrStencilSettings& that) { this->reset(that); }
-    GrStencilSettings& operator=(const GrStencilSettings& that) { this->reset(that); return *this; }
-
-    void invalidate() { fFlags |= kInvalid_PrivateFlag; }
-    void setDisabled() { fFlags = kAll_StencilFlags; }
-    void reset(const GrUserStencilSettings&, bool hasStencilClip, int numStencilBits);
-    void reset(const GrStencilSettings&);
-
-    bool isValid() const { return !(fFlags & kInvalid_PrivateFlag); }
-    bool isDisabled() const { SkASSERT(this->isValid()); return fFlags & kDisabled_StencilFlag; }
-    bool doesWrite() const { SkASSERT(this->isValid());
-                             return !(fFlags & kNoModifyStencil_StencilFlag); }
-    bool isTwoSided() const { SkASSERT(this->isValid());
-                              return !(fFlags & kSingleSided_StencilFlag); }
-    bool usesWrapOp() const { SkASSERT(this->isValid());
-                              return !(fFlags & kNoWrapOps_StencilFlag); }
-
-    void genKey(GrProcessorKeyBuilder* b) const;
-
-    bool operator!=(const GrStencilSettings& that) const { return !(*this == that); }
-    bool operator==(const GrStencilSettings&) const;
-
-    struct Face : public GrTStencilFaceSettings<GrStencilTest, GrStencilOp> {
-        void reset(const GrUserStencilSettings::Face&, bool useStencilClip, int numStencilBits);
-        void setDisabled();
-    };
-
-    const Face& front() const { SkASSERT(!this->isDisabled()); return fFront; }
-    const Face& back() const { SkASSERT(this->isTwoSided()); return fBack; }
-
-    /**
-     * Given a thing to draw into the stencil clip, a fill type, and a set op
-     * this function determines:
-     *      1. Whether the thing can be draw directly to the stencil clip or
-     *      needs to be drawn to the client portion of the stencil first.
-     *      2. How many passes are needed.
-     *      3. What those passes are.
-     *
-     * @param op                the set op to combine this element with the existing clip
-     * @param canBeDirect       can the caller draw this element directly (without using stencil)?
-     * @param invertedFill      is this path inverted
-     * @param drawDirectToClip  out: true if caller should draw the element directly, false if it
-     *                          should draw it into the user stencil bits first.
-     *
-     * @return a null-terminated array of settings for stencil passes.
-     *
-     *         If drawDirectToClip is false, the caller must first draw the element into the user
-     *         stencil bits, and then cover the clip area with multiple passes using the returned
-     *         stencil settings.
-     *
-     *         If drawDirectToClip is true, the returned array will only have one pass and the
-     *         caller should use those stencil settings while drawing the element directly.
-     */
-    static GrUserStencilSettings const* const* GetClipPasses(SkRegion::Op op,
-                                                             bool canBeDirect,
-                                                             bool invertedFill,
-                                                             bool* drawDirectToClip);
-
-private:
-    // Internal flag for backends to optionally mark their tracked stencil state as invalid.
-    enum { kInvalid_PrivateFlag = (kLast_StencilFlag << 1) };
-
-    uint32_t   fFlags;
-    Face       fFront;
-    Face       fBack;
-};
-
-#endif