chromium/third_party/skia/src/gpu/ganesh/ops/AALinearizingConvexPathRenderer.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/AALinearizingConvexPathRenderer.h"

#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.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/SkStrokeRec.h"
#include "include/gpu/ganesh/GrRecordingContext.h"
#include "include/private/SkColorData.h"
#include "include/private/base/SkAssert.h"
#include "include/private/base/SkDebug.h"
#include "include/private/base/SkMalloc.h"
#include "include/private/base/SkMath.h"
#include "include/private/base/SkTArray.h"
#include "include/private/base/SkTDArray.h"
#include "include/private/gpu/ganesh/GrTypesPriv.h"
#include "src/gpu/BufferWriter.h"
#include "src/gpu/ganesh/GrAppliedClip.h"
#include "src/gpu/ganesh/GrAuditTrail.h"
#include "src/gpu/ganesh/GrBuffer.h"
#include "src/gpu/ganesh/GrDefaultGeoProcFactory.h"
#include "src/gpu/ganesh/GrDrawOpTest.h"
#include "src/gpu/ganesh/GrGeometryProcessor.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/GrSimpleMesh.h"
#include "src/gpu/ganesh/GrStyle.h"
#include "src/gpu/ganesh/SurfaceDrawContext.h"
#include "src/gpu/ganesh/geometry/GrAAConvexTessellator.h"
#include "src/gpu/ganesh/geometry/GrStyledShape.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 <algorithm>
#include <cstdint>
#include <cstring>
#include <utility>

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

usingnamespaceskia_private;

///////////////////////////////////////////////////////////////////////////////
namespace skgpu::ganesh {

namespace {

static const int DEFAULT_BUFFER_SIZE = …;

// The thicker the stroke, the harder it is to produce high-quality results using tessellation. For
// the time being, we simply drop back to software rendering above this stroke width.
static const SkScalar kMaxStrokeWidth = …;

// extract the result vertices and indices from the GrAAConvexTessellator
void extract_verts(const GrAAConvexTessellator& tess,
                   const SkMatrix* localCoordsMatrix,
                   void* vertData,
                   const VertexColor& color,
                   uint16_t firstIndex,
                   uint16_t* idxs) { … }

GrGeometryProcessor* create_lines_only_gp(SkArenaAlloc* arena,
                                          bool tweakAlphaForCoverage,
                                          bool usesLocalCoords,
                                          bool wideColor) { … }

class AAFlatteningConvexPathOp final : public GrMeshDrawOp { … };

}  // anonymous namespace

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

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

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

}  // namespace skgpu::ganesh

#if defined(GPU_TEST_UTILS)

GR_DRAW_OP_TEST_DEFINE(AAFlatteningConvexPathOp) {
    SkMatrix viewMatrix = GrTest::TestMatrixPreservesRightAngles(random);
    const SkPath& path = GrTest::TestPathConvex(random);

    SkStrokeRec::Style styles[3] = { SkStrokeRec::kFill_Style,
                                     SkStrokeRec::kStroke_Style,
                                     SkStrokeRec::kStrokeAndFill_Style };

    SkStrokeRec::Style style = styles[random->nextU() % 3];

    SkScalar strokeWidth = -1.f;
    SkPaint::Join join = SkPaint::kMiter_Join;
    SkScalar miterLimit = 0.5f;

    if (SkStrokeRec::kFill_Style != style) {
        strokeWidth = random->nextRangeF(1.0f, 10.0f);
        if (random->nextBool()) {
            join = SkPaint::kMiter_Join;
        } else {
            join = SkPaint::kBevel_Join;
        }
        miterLimit = random->nextRangeF(0.5f, 2.0f);
    }
    const GrUserStencilSettings* stencilSettings = GrGetRandomStencil(random, context);
    return skgpu::ganesh::AAFlatteningConvexPathOp::Make(context,
                                                         std::move(paint),
                                                         viewMatrix,
                                                         path,
                                                         strokeWidth,
                                                         style,
                                                         join,
                                                         miterLimit,
                                                         stencilSettings);
}

#endif