GrPathStencilSettings.h

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/*
 * 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 GrPathStencilSettings_DEFINED
#define GrPathStencilSettings_DEFINED
 
#include "src/gpu/ganesh/GrUserStencilSettings.h"
 
////////////////////////////////////////////////////////////////////////////////
// Stencil rules for paths
 
////// Even/Odd
 
static constexpr GrUserStencilSettings gEOStencilPass(
    GrUserStencilSettings::StaticInit<
        0xffff,
        GrUserStencilTest::kAlwaysIfInClip,
        0xffff,
        GrUserStencilOp::kInvert,
        GrUserStencilOp::kKeep,
        0xffff>()
);
 
// ok not to check clip b/c stencil pass only wrote inside clip
static constexpr GrUserStencilSettings gEOColorPass(
    GrUserStencilSettings::StaticInit<
        0x0000,
        GrUserStencilTest::kNotEqual,
        0xffff,
        GrUserStencilOp::kZero,
        GrUserStencilOp::kZero,
        0xffff>()
);
 
// have to check clip b/c outside clip will always be zero.
static constexpr GrUserStencilSettings gInvEOColorPass(
    GrUserStencilSettings::StaticInit<
        0x0000,
        GrUserStencilTest::kEqualIfInClip,
        0xffff,
        GrUserStencilOp::kZero,
        GrUserStencilOp::kZero,
        0xffff>()
);
 
////// Winding
 
static constexpr GrUserStencilSettings gWindStencilPass (
    GrUserStencilSettings::StaticInitSeparate<
        0xffff,                                0xffff,
        GrUserStencilTest::kAlwaysIfInClip,    GrUserStencilTest::kAlwaysIfInClip,
        0xffff,                                0xffff,
        GrUserStencilOp::kIncWrap,             GrUserStencilOp::kDecWrap,
        GrUserStencilOp::kKeep,                GrUserStencilOp::kKeep,
        0xffff,                                0xffff>()
);
 
static constexpr GrUserStencilSettings gWindColorPass(
    GrUserStencilSettings::StaticInit<
        0x0000,
        GrUserStencilTest::kLessIfInClip, // "0 < stencil" is equivalent to "0 != stencil".
        0xffff,
        GrUserStencilOp::kZero,
        GrUserStencilOp::kZero,
        0xffff>()
);
 
static constexpr GrUserStencilSettings gInvWindColorPass(
    GrUserStencilSettings::StaticInit<
        0x0000,
        GrUserStencilTest::kEqualIfInClip,
        0xffff,
        GrUserStencilOp::kZero,
        GrUserStencilOp::kZero,
        0xffff>()
);
 
////// Normal render to stencil
 
// Sometimes the default path renderer can draw a path directly to the stencil
// buffer without having to first resolve the interior / exterior.
static constexpr GrUserStencilSettings gDirectToStencil(
    GrUserStencilSettings::StaticInit<
        0x0000,
        GrUserStencilTest::kAlwaysIfInClip,
        0xffff,
        GrUserStencilOp::kZero,
        GrUserStencilOp::kIncMaybeClamp,
        0xffff>()
);
 
#endif