chromium/third_party/skia/src/gpu/ganesh/ops/StrokeTessellateOp.cpp

/*
 * Copyright 2020 Google LLC.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "src/gpu/ganesh/ops/StrokeTessellateOp.h"

#include "include/core/SkColor.h"
#include "include/core/SkPath.h"
#include "include/core/SkRect.h"
#include "include/gpu/ganesh/GrRecordingContext.h"
#include "src/base/SkArenaAlloc.h"
#include "src/gpu/ganesh/GrAppliedClip.h"
#include "src/gpu/ganesh/GrCaps.h"
#include "src/gpu/ganesh/GrOpFlushState.h"
#include "src/gpu/ganesh/GrPaint.h"
#include "src/gpu/ganesh/GrProcessorAnalysis.h"
#include "src/gpu/ganesh/GrProgramInfo.h"
#include "src/gpu/ganesh/GrRecordingContextPriv.h"
#include "src/gpu/ganesh/GrRenderTargetProxy.h"
#include "src/gpu/ganesh/GrShaderCaps.h"
#include "src/gpu/ganesh/GrSurfaceProxyView.h"
#include "src/gpu/ganesh/GrUserStencilSettings.h"
#include "src/gpu/ganesh/tessellate/GrStrokeTessellationShader.h"

#include <utility>

namespace skgpu::ganesh {

StrokeTessellateOp::StrokeTessellateOp(GrAAType aaType, const SkMatrix& viewMatrix,
                                       const SkPath& path, const SkStrokeRec& stroke,
                                       GrPaint&& paint)
        : … { … }

void StrokeTessellateOp::visitProxies(const GrVisitProxyFunc& func) const { … }

GrProcessorSet::Analysis StrokeTessellateOp::finalize(const GrCaps& caps,
                                                      const GrAppliedClip* clip,
                                                      GrClampType clampType) { … }

GrOp::CombineResult StrokeTessellateOp::onCombineIfPossible(GrOp* grOp, SkArenaAlloc* alloc,
                                                            const GrCaps& caps) { … }

// Marks every stencil value as "1".
constexpr static GrUserStencilSettings kMarkStencil(
    GrUserStencilSettings::StaticInit<
        0x0001,
        GrUserStencilTest::kLessIfInClip,  // Match kTestAndResetStencil.
        0x0000,  // Always fail.
        GrUserStencilOp::kZero,
        GrUserStencilOp::kReplace,
        0xffff>());

// Passes if the stencil value is nonzero. Also resets the stencil value to zero on pass. This is
// formulated to match kMarkStencil everywhere except the ref and compare mask. This will allow us
// to use the same pipeline for both stencil and fill if dynamic stencil state is supported.
constexpr static GrUserStencilSettings kTestAndResetStencil(
    GrUserStencilSettings::StaticInit<
        0x0000,
        GrUserStencilTest::kLessIfInClip,  // i.e., "not equal to zero, if in clip".
        0x0001,
        GrUserStencilOp::kZero,
        GrUserStencilOp::kReplace,
        0xffff>());

void StrokeTessellateOp::prePrepareTessellator(GrTessellationShader::ProgramArgs&& args,
                                               GrAppliedClip&& clip) { … }

void StrokeTessellateOp::onPrePrepare(GrRecordingContext* context,
                                      const GrSurfaceProxyView& writeView, GrAppliedClip* clip,
                                      const GrDstProxyView& dstProxyView,
                                      GrXferBarrierFlags renderPassXferBarriers, GrLoadOp
                                      colorLoadOp) { … }

void StrokeTessellateOp::onPrepare(GrOpFlushState* flushState) { … }

void StrokeTessellateOp::onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) { … }

}  // namespace skgpu::ganesh