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

/*
 * Copyright 2015 Google Inc.
 *
 * 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/TriangulatingPathRenderer.h"

#include "include/core/SkData.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPath.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkString.h"
#include "include/core/SkSurfaceProps.h"
#include "include/core/SkTypes.h"
#include "include/gpu/ganesh/GrRecordingContext.h"
#include "include/private/SkColorData.h"
#include "include/private/SkIDChangeListener.h"
#include "include/private/base/SkMalloc.h"
#include "include/private/gpu/ganesh/GrTypesPriv.h"
#include "src/core/SkMessageBus.h"
#include "src/core/SkTraceEvent.h"
#include "src/gpu/ResourceKey.h"
#include "src/gpu/ganesh/GrAppliedClip.h"
#include "src/gpu/ganesh/GrAuditTrail.h"
#include "src/gpu/ganesh/GrBuffer.h"
#include "src/gpu/ganesh/GrCaps.h"
#include "src/gpu/ganesh/GrDefaultGeoProcFactory.h"
#include "src/gpu/ganesh/GrDrawOpTest.h"
#include "src/gpu/ganesh/GrEagerVertexAllocator.h"
#include "src/gpu/ganesh/GrGeometryProcessor.h"
#include "src/gpu/ganesh/GrGpuBuffer.h"
#include "src/gpu/ganesh/GrMeshDrawTarget.h"
#include "src/gpu/ganesh/GrOpFlushState.h"
#include "src/gpu/ganesh/GrPaint.h"
#include "src/gpu/ganesh/GrProcessorAnalysis.h"
#include "src/gpu/ganesh/GrProcessorSet.h"
#include "src/gpu/ganesh/GrProgramInfo.h"
#include "src/gpu/ganesh/GrRecordingContextPriv.h"
#include "src/gpu/ganesh/GrResourceProvider.h"
#include "src/gpu/ganesh/GrSimpleMesh.h"
#include "src/gpu/ganesh/GrStyle.h"
#include "src/gpu/ganesh/GrThreadSafeCache.h"
#include "src/gpu/ganesh/SurfaceDrawContext.h"
#include "src/gpu/ganesh/geometry/GrAATriangulator.h"
#include "src/gpu/ganesh/geometry/GrPathUtils.h"
#include "src/gpu/ganesh/geometry/GrStyledShape.h"
#include "src/gpu/ganesh/geometry/GrTriangulator.h"
#include "src/gpu/ganesh/ops/GrMeshDrawOp.h"
#include "src/gpu/ganesh/ops/GrOp.h"
#include "src/gpu/ganesh/ops/GrSimpleMeshDrawOpHelperWithStencil.h"

#if defined(GPU_TEST_UTILS)
#include "src/base/SkRandom.h"
#include "src/gpu/ganesh/GrTestUtils.h"
#endif

#include <array>
#include <cstdint>
#include <cstring>
#include <utility>

class GrDstProxyView;
class GrSurfaceProxyView;
class SkArenaAlloc;
enum class GrXferBarrierFlags;
struct GrUserStencilSettings;

#if !defined(SK_ENABLE_OPTIMIZE_SIZE)

#ifndef GR_AA_TESSELLATOR_MAX_VERB_COUNT
#define GR_AA_TESSELLATOR_MAX_VERB_COUNT …
#endif

/*
 * This path renderer linearizes and decomposes the path into triangles using GrTriangulator,
 * uploads the triangles to a vertex buffer, and renders them with a single draw call. It can do
 * screenspace antialiasing with a one-pixel coverage ramp.
 */
namespace {

// The TessInfo struct contains ancillary data not specifically required for the triangle
// data (which is stored in a GrThreadSafeCache::VertexData object).
// The 'fNumVertices' field is a temporary exception. It is still needed to support the
// AA triangulated path case - which doesn't use the GrThreadSafeCache nor the VertexData object).
// When there is an associated VertexData, its numVertices should always match the TessInfo's
// value.
struct TessInfo { … };

static sk_sp<SkData> create_data(int numVertices, bool isLinear, SkScalar tol) { … }

bool cache_match(const SkData* data, SkScalar tol) { … }

// Should 'challenger' replace 'incumbent' in the cache if there is a collision?
bool is_newer_better(SkData* incumbent, SkData* challenger) { … }

// When the SkPathRef genID changes, invalidate a corresponding GrResource described by key.
class UniqueKeyInvalidator : public SkIDChangeListener { … };

class StaticVertexAllocator : public GrEagerVertexAllocator { … };

class TriangulatingPathOp final : public GrMeshDrawOp { … };

}  // anonymous namespace

///////////////////////////////////////////////////////////////////////////////////////////////////

#if defined(GPU_TEST_UTILS)

GR_DRAW_OP_TEST_DEFINE(TriangulatingPathOp) {
    SkMatrix viewMatrix = GrTest::TestMatrixInvertible(random);
    const SkPath& path = GrTest::TestPath(random);
    SkIRect devClipBounds = SkIRect::MakeLTRB(
        random->nextU(), random->nextU(), random->nextU(), random->nextU());
    devClipBounds.sort();
    static constexpr GrAAType kAATypes[] = {GrAAType::kNone, GrAAType::kMSAA, GrAAType::kCoverage};
    GrAAType aaType;
    do {
        aaType = kAATypes[random->nextULessThan(std::size(kAATypes))];
    } while(GrAAType::kMSAA == aaType && numSamples <= 1);
    GrStyle style;
    do {
        GrTest::TestStyle(random, &style);
    } while (!style.isSimpleFill());
    GrStyledShape shape(path, style);
    return TriangulatingPathOp::Make(context, std::move(paint), shape, viewMatrix, devClipBounds,
                                     aaType, GrGetRandomStencil(random, context));
}

#endif

///////////////////////////////////////////////////////////////////////////////////////////////////

namespace skgpu::ganesh {

TriangulatingPathRenderer::TriangulatingPathRenderer()
    : … { … }

PathRenderer::CanDrawPath TriangulatingPathRenderer::onCanDrawPath(
        const CanDrawPathArgs& args) const { … }

bool TriangulatingPathRenderer::onDrawPath(const DrawPathArgs& args) { … }

}  // namespace skgpu::ganesh

#endif // SK_ENABLE_OPTIMIZE_SIZE