xref: /aosp_15_r20/external/skia/src/gpu/ganesh/ops/GrPathStencilSettings.h (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)

/*
 * 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