143475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth/* 243475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth* Copyright 2017 Google Inc. 343475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth* 443475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth* Use of this source code is governed by a BSD-style license that can be 543475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth* found in the LICENSE file. 643475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth*/ 743475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth 843475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth#include "SkShadowUtils.h" 943475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth#include "SkCanvas.h" 10efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth#include "SkColorFilter.h" 11efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth#include "SkPath.h" 12d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon#include "SkRandom.h" 135e6895295a88fb702f49309542149d73f709bb10Brian Salomon#include "SkResourceCache.h" 14efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth#include "SkShadowTessellator.h" 154d1955c43aaab045511b74a495dfbea4ef0057c5Ben Wagner#include "SkString.h" 165e6895295a88fb702f49309542149d73f709bb10Brian Salomon#include "SkTLazy.h" 17aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon#include "SkVertices.h" 185e6895295a88fb702f49309542149d73f709bb10Brian Salomon#if SK_SUPPORT_GPU 195e6895295a88fb702f49309542149d73f709bb10Brian Salomon#include "GrShape.h" 205e6895295a88fb702f49309542149d73f709bb10Brian Salomon#include "effects/GrBlurredEdgeFragmentProcessor.h" 215e6895295a88fb702f49309542149d73f709bb10Brian Salomon#endif 22cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth#include "../../src/effects/shadows/SkAmbientShadowMaskFilter.h" 23cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth#include "../../src/effects/shadows/SkSpotShadowMaskFilter.h" 24efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 25efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth/** 26efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth* Gaussian color filter -- produces a Gaussian ramp based on the color's B value, 27efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth* then blends with the color's G value. 28efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth* Final result is black with alpha of Gaussian(B)*G. 29efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth* The assumption is that the original color's alpha is 1. 30efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth*/ 31efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verthclass SK_API SkGaussianColorFilter : public SkColorFilter { 32efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verthpublic: 33efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth static sk_sp<SkColorFilter> Make() { 34efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth return sk_sp<SkColorFilter>(new SkGaussianColorFilter); 35efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth } 36efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 37efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth void filterSpan(const SkPMColor src[], int count, SkPMColor dst[]) const override; 38efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 39efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth#if SK_SUPPORT_GPU 40efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth sk_sp<GrFragmentProcessor> asFragmentProcessor(GrContext*, SkColorSpace*) const override; 41efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth#endif 42efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 43efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth SK_TO_STRING_OVERRIDE() 44efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkGaussianColorFilter) 45efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 46efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verthprotected: 47efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth void flatten(SkWriteBuffer&) const override {} 48efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 49efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verthprivate: 50efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth SkGaussianColorFilter() : INHERITED() {} 51efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 52efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth typedef SkColorFilter INHERITED; 53efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth}; 54efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 55efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verthvoid SkGaussianColorFilter::filterSpan(const SkPMColor src[], int count, SkPMColor dst[]) const { 56efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth for (int i = 0; i < count; ++i) { 57efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth SkPMColor c = src[i]; 58efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 59efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth SkScalar factor = SK_Scalar1 - SkGetPackedB32(c) / 255.f; 60efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth factor = SkScalarExp(-factor * factor * 4) - 0.018f; 61efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 620bd699e497819344083df4715928a54a597cd630Brian Salomon SkScalar a = factor * SkGetPackedG32(c); 630bd699e497819344083df4715928a54a597cd630Brian Salomon dst[i] = SkPackARGB32(a, a, a, a); 64efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth } 65efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth} 66efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 67efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verthsk_sp<SkFlattenable> SkGaussianColorFilter::CreateProc(SkReadBuffer&) { 68efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth return Make(); 69efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth} 70efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 71efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth#ifndef SK_IGNORE_TO_STRING 72efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verthvoid SkGaussianColorFilter::toString(SkString* str) const { 73efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth str->append("SkGaussianColorFilter "); 74efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth} 75efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth#endif 76efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 77efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth#if SK_SUPPORT_GPU 78efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 79efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verthsk_sp<GrFragmentProcessor> SkGaussianColorFilter::asFragmentProcessor(GrContext*, 80efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth SkColorSpace*) const { 81efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth return GrBlurredEdgeFP::Make(GrBlurredEdgeFP::kGaussian_Mode); 82efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth} 83efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth#endif 84efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 85efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth/////////////////////////////////////////////////////////////////////////////////////////////////// 865e6895295a88fb702f49309542149d73f709bb10Brian Salomon 875e6895295a88fb702f49309542149d73f709bb10Brian Salomonnamespace { 885e6895295a88fb702f49309542149d73f709bb10Brian Salomon 89bc9956de31da06529b540918832f2435f884ac26Brian Salomonuint64_t resource_cache_shared_id() { 90bc9956de31da06529b540918832f2435f884ac26Brian Salomon return 0x2020776f64616873llu; // 'shadow ' 91bc9956de31da06529b540918832f2435f884ac26Brian Salomon} 92bc9956de31da06529b540918832f2435f884ac26Brian Salomon 93d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon/** Factory for an ambient shadow mesh with particular shadow properties. */ 945e6895295a88fb702f49309542149d73f709bb10Brian Salomonstruct AmbientVerticesFactory { 95b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar fOccluderHeight = SK_ScalarNaN; // NaN so that isCompatible will fail until init'ed. 96b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar fAmbientAlpha; 975e6895295a88fb702f49309542149d73f709bb10Brian Salomon bool fTransparent; 985e6895295a88fb702f49309542149d73f709bb10Brian Salomon 99d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon bool isCompatible(const AmbientVerticesFactory& that, SkVector* translate) const { 100b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth if (fOccluderHeight != that.fOccluderHeight || fAmbientAlpha != that.fAmbientAlpha || 101b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth fTransparent != that.fTransparent) { 102d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return false; 103d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 104d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon translate->set(0, 0); 105d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return true; 1065e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 1075e6895295a88fb702f49309542149d73f709bb10Brian Salomon 108aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> makeVertices(const SkPath& path, const SkMatrix& ctm) const { 109b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar z = fOccluderHeight; 110b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth return SkShadowTessellator::MakeAmbient(path, ctm, 111b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth [z](SkScalar, SkScalar) { return z; }, 112b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth fAmbientAlpha, fTransparent); 1135e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 1145e6895295a88fb702f49309542149d73f709bb10Brian Salomon}; 1155e6895295a88fb702f49309542149d73f709bb10Brian Salomon 116d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon/** Factory for an spot shadow mesh with particular shadow properties. */ 1175e6895295a88fb702f49309542149d73f709bb10Brian Salomonstruct SpotVerticesFactory { 118d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon enum class OccluderType { 119d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // The umbra cannot be dropped out because the occluder is not opaque. 120d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon kTransparent, 121d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // The umbra can be dropped where it is occluded. 122d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon kOpaque, 123d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // It is known that the entire umbra is occluded. 124d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon kOpaqueCoversUmbra 125d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon }; 126d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 1275e6895295a88fb702f49309542149d73f709bb10Brian Salomon SkVector fOffset; 128b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar fOccluderHeight = SK_ScalarNaN; // NaN so that isCompatible will fail until init'ed. 129b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkPoint3 fDevLightPos; 130b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar fLightRadius; 131b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar fSpotAlpha; 132d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon OccluderType fOccluderType; 1335e6895295a88fb702f49309542149d73f709bb10Brian Salomon 134d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon bool isCompatible(const SpotVerticesFactory& that, SkVector* translate) const { 135b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth if (fOccluderHeight != that.fOccluderHeight || fDevLightPos.fZ != that.fDevLightPos.fZ || 136b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth fLightRadius != that.fLightRadius || fSpotAlpha != that.fSpotAlpha || 137b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth fOccluderType != that.fOccluderType) { 138d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return false; 139d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 140d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon switch (fOccluderType) { 141d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon case OccluderType::kTransparent: 142d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon case OccluderType::kOpaqueCoversUmbra: 143d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // 'this' and 'that' will either both have no umbra removed or both have all the 144d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // umbra removed. 145d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon *translate = that.fOffset - fOffset; 146d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return true; 147d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon case OccluderType::kOpaque: 148d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // In this case we partially remove the umbra differently for 'this' and 'that' 149d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // if the offsets don't match. 150d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (fOffset == that.fOffset) { 151d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon translate->set(0, 0); 152d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return true; 153d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 154d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return false; 155d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 156d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon SkFAIL("Uninitialized occluder type?"); 157d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return false; 1585e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 1595e6895295a88fb702f49309542149d73f709bb10Brian Salomon 160aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> makeVertices(const SkPath& path, const SkMatrix& ctm) const { 161d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon bool transparent = OccluderType::kTransparent == fOccluderType; 162b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar z = fOccluderHeight; 163b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth return SkShadowTessellator::MakeSpot(path, ctm, 164b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth [z](SkScalar, SkScalar) -> SkScalar { return z; }, 165b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth fDevLightPos, fLightRadius, 166b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth fSpotAlpha, transparent); 1675e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 1685e6895295a88fb702f49309542149d73f709bb10Brian Salomon}; 1695e6895295a88fb702f49309542149d73f709bb10Brian Salomon 1705e6895295a88fb702f49309542149d73f709bb10Brian Salomon/** 171d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon * This manages a set of tessellations for a given shape in the cache. Because SkResourceCache 172d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon * records are immutable this is not itself a Rec. When we need to update it we return this on 173d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon * the FindVisitor and let the cache destory the Rec. We'll update the tessellations and then add 174d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon * a new Rec with an adjusted size for any deletions/additions. 1755e6895295a88fb702f49309542149d73f709bb10Brian Salomon */ 176d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomonclass CachedTessellations : public SkRefCnt { 1775e6895295a88fb702f49309542149d73f709bb10Brian Salomonpublic: 178d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon size_t size() const { return fAmbientSet.size() + fSpotSet.size(); } 179d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 180aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> find(const AmbientVerticesFactory& ambient, const SkMatrix& matrix, 181aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon SkVector* translate) const { 182d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return fAmbientSet.find(ambient, matrix, translate); 183d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 184d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 185aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> add(const SkPath& devPath, const AmbientVerticesFactory& ambient, 186aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon const SkMatrix& matrix) { 187d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return fAmbientSet.add(devPath, ambient, matrix); 188d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 189d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 190aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> find(const SpotVerticesFactory& spot, const SkMatrix& matrix, 191aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon SkVector* translate) const { 192d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return fSpotSet.find(spot, matrix, translate); 193d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 194d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 195aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> add(const SkPath& devPath, const SpotVerticesFactory& spot, 196aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon const SkMatrix& matrix) { 197d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return fSpotSet.add(devPath, spot, matrix); 198d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 199d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 200d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomonprivate: 201d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon template <typename FACTORY, int MAX_ENTRIES> 202d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon class Set { 203d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon public: 204d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon size_t size() const { return fSize; } 205d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 206aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> find(const FACTORY& factory, const SkMatrix& matrix, 207aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon SkVector* translate) const { 208d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon for (int i = 0; i < MAX_ENTRIES; ++i) { 209d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (fEntries[i].fFactory.isCompatible(factory, translate)) { 210d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon const SkMatrix& m = fEntries[i].fMatrix; 211d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (matrix.hasPerspective() || m.hasPerspective()) { 212d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (matrix != fEntries[i].fMatrix) { 213d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon continue; 214d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 215d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } else if (matrix.getScaleX() != m.getScaleX() || 216d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon matrix.getSkewX() != m.getSkewX() || 217d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon matrix.getScaleY() != m.getScaleY() || 218d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon matrix.getSkewY() != m.getSkewY()) { 219d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon continue; 220d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 221d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon *translate += SkVector{matrix.getTranslateX() - m.getTranslateX(), 222d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon matrix.getTranslateY() - m.getTranslateY()}; 223d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return fEntries[i].fVertices; 224d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 225d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 226d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return nullptr; 227d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 228d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 229aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> add(const SkPath& path, const FACTORY& factory, const SkMatrix& matrix) { 230aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> vertices = factory.makeVertices(path, matrix); 231d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (!vertices) { 232d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return nullptr; 233d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 234d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon int i; 235d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (fCount < MAX_ENTRIES) { 236d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon i = fCount++; 237d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } else { 238d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon i = gRandom.nextULessThan(MAX_ENTRIES); 239aa9e3326f71c74e6250ae783cc3257d835624dd0Mike Reed fSize -= fEntries[i].fVertices->approximateSize(); 240d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 241d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon fEntries[i].fFactory = factory; 242d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon fEntries[i].fVertices = vertices; 243d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon fEntries[i].fMatrix = matrix; 244aa9e3326f71c74e6250ae783cc3257d835624dd0Mike Reed fSize += vertices->approximateSize(); 245d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return vertices; 246d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 247d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 248d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon private: 249d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon struct Entry { 250d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon FACTORY fFactory; 251aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> fVertices; 252d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon SkMatrix fMatrix; 253d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon }; 254d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon Entry fEntries[MAX_ENTRIES]; 255d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon int fCount = 0; 256d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon size_t fSize = 0; 257d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon }; 258d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 259d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon Set<AmbientVerticesFactory, 4> fAmbientSet; 260d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon Set<SpotVerticesFactory, 4> fSpotSet; 261d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 262d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon static SkRandom gRandom; 263d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon}; 264d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 265d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian SalomonSkRandom CachedTessellations::gRandom; 266d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 267d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon/** 268d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon * A record of shadow vertices stored in SkResourceCache of CachedTessellations for a particular 269d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon * path. The key represents the path's geometry and not any shadow params. 270d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon */ 271d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomonclass CachedTessellationsRec : public SkResourceCache::Rec { 272d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomonpublic: 273d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon CachedTessellationsRec(const SkResourceCache::Key& key, 274d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon sk_sp<CachedTessellations> tessellations) 275d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon : fTessellations(std::move(tessellations)) { 2765e6895295a88fb702f49309542149d73f709bb10Brian Salomon fKey.reset(new uint8_t[key.size()]); 2775e6895295a88fb702f49309542149d73f709bb10Brian Salomon memcpy(fKey.get(), &key, key.size()); 2785e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 2795e6895295a88fb702f49309542149d73f709bb10Brian Salomon 2805e6895295a88fb702f49309542149d73f709bb10Brian Salomon const Key& getKey() const override { 2815e6895295a88fb702f49309542149d73f709bb10Brian Salomon return *reinterpret_cast<SkResourceCache::Key*>(fKey.get()); 2825e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 2835e6895295a88fb702f49309542149d73f709bb10Brian Salomon 284d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon size_t bytesUsed() const override { return fTessellations->size(); } 2855e6895295a88fb702f49309542149d73f709bb10Brian Salomon 286d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon const char* getCategory() const override { return "tessellated shadow masks"; } 2875e6895295a88fb702f49309542149d73f709bb10Brian Salomon 288d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon sk_sp<CachedTessellations> refTessellations() const { return fTessellations; } 2895e6895295a88fb702f49309542149d73f709bb10Brian Salomon 290d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon template <typename FACTORY> 291aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> find(const FACTORY& factory, const SkMatrix& matrix, 292aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon SkVector* translate) const { 293d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return fTessellations->find(factory, matrix, translate); 294d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 2955e6895295a88fb702f49309542149d73f709bb10Brian Salomon 2965e6895295a88fb702f49309542149d73f709bb10Brian Salomonprivate: 2975e6895295a88fb702f49309542149d73f709bb10Brian Salomon std::unique_ptr<uint8_t[]> fKey; 298d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon sk_sp<CachedTessellations> fTessellations; 2995e6895295a88fb702f49309542149d73f709bb10Brian Salomon}; 3005e6895295a88fb702f49309542149d73f709bb10Brian Salomon 3015e6895295a88fb702f49309542149d73f709bb10Brian Salomon/** 3025e6895295a88fb702f49309542149d73f709bb10Brian Salomon * Used by FindVisitor to determine whether a cache entry can be reused and if so returns the 303d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon * vertices and a translation vector. If the CachedTessellations does not contain a suitable 304d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon * mesh then we inform SkResourceCache to destroy the Rec and we return the CachedTessellations 305d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon * to the caller. The caller will update it and reinsert it back into the cache. 3065e6895295a88fb702f49309542149d73f709bb10Brian Salomon */ 3075e6895295a88fb702f49309542149d73f709bb10Brian Salomontemplate <typename FACTORY> 3085e6895295a88fb702f49309542149d73f709bb10Brian Salomonstruct FindContext { 3095e6895295a88fb702f49309542149d73f709bb10Brian Salomon FindContext(const SkMatrix* viewMatrix, const FACTORY* factory) 3105e6895295a88fb702f49309542149d73f709bb10Brian Salomon : fViewMatrix(viewMatrix), fFactory(factory) {} 311d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon const SkMatrix* const fViewMatrix; 312d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // If this is valid after Find is called then we found the vertices and they should be drawn 313d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // with fTranslate applied. 314aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> fVertices; 315d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon SkVector fTranslate = {0, 0}; 316d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 317d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // If this is valid after Find then the caller should add the vertices to the tessellation set 318d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // and create a new CachedTessellationsRec and insert it into SkResourceCache. 319d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon sk_sp<CachedTessellations> fTessellationsOnFailure; 320d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 3215e6895295a88fb702f49309542149d73f709bb10Brian Salomon const FACTORY* fFactory; 3225e6895295a88fb702f49309542149d73f709bb10Brian Salomon}; 3235e6895295a88fb702f49309542149d73f709bb10Brian Salomon 3245e6895295a88fb702f49309542149d73f709bb10Brian Salomon/** 3255e6895295a88fb702f49309542149d73f709bb10Brian Salomon * Function called by SkResourceCache when a matching cache key is found. The FACTORY and matrix of 3265e6895295a88fb702f49309542149d73f709bb10Brian Salomon * the FindContext are used to determine if the vertices are reusable. If so the vertices and 3275e6895295a88fb702f49309542149d73f709bb10Brian Salomon * necessary translation vector are set on the FindContext. 3285e6895295a88fb702f49309542149d73f709bb10Brian Salomon */ 3295e6895295a88fb702f49309542149d73f709bb10Brian Salomontemplate <typename FACTORY> 3305e6895295a88fb702f49309542149d73f709bb10Brian Salomonbool FindVisitor(const SkResourceCache::Rec& baseRec, void* ctx) { 3315e6895295a88fb702f49309542149d73f709bb10Brian Salomon FindContext<FACTORY>* findContext = (FindContext<FACTORY>*)ctx; 332d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon const CachedTessellationsRec& rec = static_cast<const CachedTessellationsRec&>(baseRec); 333d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon findContext->fVertices = 334d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon rec.find(*findContext->fFactory, *findContext->fViewMatrix, &findContext->fTranslate); 335d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (findContext->fVertices) { 336d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return true; 3375e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 338d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // We ref the tessellations and let the cache destroy the Rec. Once the tessellations have been 339d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // manipulated we will add a new Rec. 340d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon findContext->fTessellationsOnFailure = rec.refTessellations(); 341d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return false; 3425e6895295a88fb702f49309542149d73f709bb10Brian Salomon} 3435e6895295a88fb702f49309542149d73f709bb10Brian Salomon 3445e6895295a88fb702f49309542149d73f709bb10Brian Salomonclass ShadowedPath { 3455e6895295a88fb702f49309542149d73f709bb10Brian Salomonpublic: 3465e6895295a88fb702f49309542149d73f709bb10Brian Salomon ShadowedPath(const SkPath* path, const SkMatrix* viewMatrix) 347a84898dbb8d8f7cb8c3e9bdfb4c31d85dff1922fJim Van Verth : fPath(path) 3485e6895295a88fb702f49309542149d73f709bb10Brian Salomon , fViewMatrix(viewMatrix) 3495e6895295a88fb702f49309542149d73f709bb10Brian Salomon#if SK_SUPPORT_GPU 3505e6895295a88fb702f49309542149d73f709bb10Brian Salomon , fShapeForKey(*path, GrStyle::SimpleFill()) 3515e6895295a88fb702f49309542149d73f709bb10Brian Salomon#endif 3525e6895295a88fb702f49309542149d73f709bb10Brian Salomon {} 3535e6895295a88fb702f49309542149d73f709bb10Brian Salomon 354a84898dbb8d8f7cb8c3e9bdfb4c31d85dff1922fJim Van Verth const SkPath& path() const { return *fPath; } 3555e6895295a88fb702f49309542149d73f709bb10Brian Salomon const SkMatrix& viewMatrix() const { return *fViewMatrix; } 3565e6895295a88fb702f49309542149d73f709bb10Brian Salomon#if SK_SUPPORT_GPU 3575e6895295a88fb702f49309542149d73f709bb10Brian Salomon /** Negative means the vertices should not be cached for this path. */ 3585e6895295a88fb702f49309542149d73f709bb10Brian Salomon int keyBytes() const { return fShapeForKey.unstyledKeySize() * sizeof(uint32_t); } 3595e6895295a88fb702f49309542149d73f709bb10Brian Salomon void writeKey(void* key) const { 3605e6895295a88fb702f49309542149d73f709bb10Brian Salomon fShapeForKey.writeUnstyledKey(reinterpret_cast<uint32_t*>(key)); 3615e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 362d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon bool isRRect(SkRRect* rrect) { return fShapeForKey.asRRect(rrect, nullptr, nullptr, nullptr); } 3635e6895295a88fb702f49309542149d73f709bb10Brian Salomon#else 3645e6895295a88fb702f49309542149d73f709bb10Brian Salomon int keyBytes() const { return -1; } 3655e6895295a88fb702f49309542149d73f709bb10Brian Salomon void writeKey(void* key) const { SkFAIL("Should never be called"); } 366d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon bool isRRect(SkRRect* rrect) { return false; } 3675e6895295a88fb702f49309542149d73f709bb10Brian Salomon#endif 3685e6895295a88fb702f49309542149d73f709bb10Brian Salomon 3695e6895295a88fb702f49309542149d73f709bb10Brian Salomonprivate: 370a84898dbb8d8f7cb8c3e9bdfb4c31d85dff1922fJim Van Verth const SkPath* fPath; 3715e6895295a88fb702f49309542149d73f709bb10Brian Salomon const SkMatrix* fViewMatrix; 3725e6895295a88fb702f49309542149d73f709bb10Brian Salomon#if SK_SUPPORT_GPU 3735e6895295a88fb702f49309542149d73f709bb10Brian Salomon GrShape fShapeForKey; 3745e6895295a88fb702f49309542149d73f709bb10Brian Salomon#endif 3755e6895295a88fb702f49309542149d73f709bb10Brian Salomon}; 3765e6895295a88fb702f49309542149d73f709bb10Brian Salomon 377d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon// This creates a domain of keys in SkResourceCache used by this file. 378d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomonstatic void* kNamespace; 379d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon 3805e6895295a88fb702f49309542149d73f709bb10Brian Salomon/** 3815e6895295a88fb702f49309542149d73f709bb10Brian Salomon * Draws a shadow to 'canvas'. The vertices used to draw the shadow are created by 'factory' unless 3825e6895295a88fb702f49309542149d73f709bb10Brian Salomon * they are first found in SkResourceCache. 3835e6895295a88fb702f49309542149d73f709bb10Brian Salomon */ 3845e6895295a88fb702f49309542149d73f709bb10Brian Salomontemplate <typename FACTORY> 385804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomonvoid draw_shadow(const FACTORY& factory, SkCanvas* canvas, ShadowedPath& path, SkColor color, 386804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon SkResourceCache* cache) { 3875e6895295a88fb702f49309542149d73f709bb10Brian Salomon FindContext<FACTORY> context(&path.viewMatrix(), &factory); 3885e6895295a88fb702f49309542149d73f709bb10Brian Salomon 3895e6895295a88fb702f49309542149d73f709bb10Brian Salomon SkResourceCache::Key* key = nullptr; 3905e6895295a88fb702f49309542149d73f709bb10Brian Salomon SkAutoSTArray<32 * 4, uint8_t> keyStorage; 3915e6895295a88fb702f49309542149d73f709bb10Brian Salomon int keyDataBytes = path.keyBytes(); 3925e6895295a88fb702f49309542149d73f709bb10Brian Salomon if (keyDataBytes >= 0) { 3935e6895295a88fb702f49309542149d73f709bb10Brian Salomon keyStorage.reset(keyDataBytes + sizeof(SkResourceCache::Key)); 3945e6895295a88fb702f49309542149d73f709bb10Brian Salomon key = new (keyStorage.begin()) SkResourceCache::Key(); 3955e6895295a88fb702f49309542149d73f709bb10Brian Salomon path.writeKey((uint32_t*)(keyStorage.begin() + sizeof(*key))); 396bc9956de31da06529b540918832f2435f884ac26Brian Salomon key->init(&kNamespace, resource_cache_shared_id(), keyDataBytes); 397804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon if (cache) { 398804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon cache->find(*key, FindVisitor<FACTORY>, &context); 399804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon } else { 400804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon SkResourceCache::Find(*key, FindVisitor<FACTORY>, &context); 401804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon } 4025e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 4035e6895295a88fb702f49309542149d73f709bb10Brian Salomon 404aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon sk_sp<SkVertices> vertices; 4055e6895295a88fb702f49309542149d73f709bb10Brian Salomon const SkVector* translate; 4065e6895295a88fb702f49309542149d73f709bb10Brian Salomon static constexpr SkVector kZeroTranslate = {0, 0}; 4075e6895295a88fb702f49309542149d73f709bb10Brian Salomon bool foundInCache = SkToBool(context.fVertices); 4085e6895295a88fb702f49309542149d73f709bb10Brian Salomon if (foundInCache) { 4095e6895295a88fb702f49309542149d73f709bb10Brian Salomon vertices = std::move(context.fVertices); 4105e6895295a88fb702f49309542149d73f709bb10Brian Salomon translate = &context.fTranslate; 4115e6895295a88fb702f49309542149d73f709bb10Brian Salomon } else { 4125e6895295a88fb702f49309542149d73f709bb10Brian Salomon // TODO: handle transforming the path as part of the tessellator 413d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (key) { 414d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // Update or initialize a tessellation set and add it to the cache. 415d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon sk_sp<CachedTessellations> tessellations; 416d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (context.fTessellationsOnFailure) { 417d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon tessellations = std::move(context.fTessellationsOnFailure); 418d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } else { 419d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon tessellations.reset(new CachedTessellations()); 420d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 421a84898dbb8d8f7cb8c3e9bdfb4c31d85dff1922fJim Van Verth vertices = tessellations->add(path.path(), factory, path.viewMatrix()); 422d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (!vertices) { 423d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return; 424d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 425804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon auto rec = new CachedTessellationsRec(*key, std::move(tessellations)); 426804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon if (cache) { 427804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon cache->add(rec); 428804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon } else { 429804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon SkResourceCache::Add(rec); 430804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon } 431d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } else { 432a84898dbb8d8f7cb8c3e9bdfb4c31d85dff1922fJim Van Verth vertices = factory.makeVertices(path.path(), path.viewMatrix()); 433d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (!vertices) { 434d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon return; 435d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 4360dda9cb881900241c1c2193ddf3bede72cda898bBrian Salomon } 4375e6895295a88fb702f49309542149d73f709bb10Brian Salomon translate = &kZeroTranslate; 4385e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 4395e6895295a88fb702f49309542149d73f709bb10Brian Salomon 4405e6895295a88fb702f49309542149d73f709bb10Brian Salomon SkPaint paint; 4410bd699e497819344083df4715928a54a597cd630Brian Salomon // Run the vertex color through a GaussianColorFilter and then modulate the grayscale result of 4420bd699e497819344083df4715928a54a597cd630Brian Salomon // that against our 'color' param. 4430bd699e497819344083df4715928a54a597cd630Brian Salomon paint.setColorFilter(SkColorFilter::MakeComposeFilter( 4440bd699e497819344083df4715928a54a597cd630Brian Salomon SkColorFilter::MakeModeFilter(color, SkBlendMode::kModulate), 4450bd699e497819344083df4715928a54a597cd630Brian Salomon SkGaussianColorFilter::Make())); 4465e6895295a88fb702f49309542149d73f709bb10Brian Salomon if (translate->fX || translate->fY) { 4475e6895295a88fb702f49309542149d73f709bb10Brian Salomon canvas->save(); 4485e6895295a88fb702f49309542149d73f709bb10Brian Salomon canvas->translate(translate->fX, translate->fY); 4495e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 450aff27a23ad4b38851429066dbfb43cfa7199e37cBrian Salomon canvas->drawVertices(vertices, SkBlendMode::kModulate, paint); 4515e6895295a88fb702f49309542149d73f709bb10Brian Salomon if (translate->fX || translate->fY) { 4525e6895295a88fb702f49309542149d73f709bb10Brian Salomon canvas->restore(); 4535e6895295a88fb702f49309542149d73f709bb10Brian Salomon } 4545e6895295a88fb702f49309542149d73f709bb10Brian Salomon} 4555e6895295a88fb702f49309542149d73f709bb10Brian Salomon} 4565e6895295a88fb702f49309542149d73f709bb10Brian Salomon 45743475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth// Draw an offset spot shadow and outlining ambient shadow for the given path. 45843475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verthvoid SkShadowUtils::DrawShadow(SkCanvas* canvas, const SkPath& path, SkScalar occluderHeight, 4590bd699e497819344083df4715928a54a597cd630Brian Salomon const SkPoint3& devLightPos, SkScalar lightRadius, 46043475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth SkScalar ambientAlpha, SkScalar spotAlpha, SkColor color, 461804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon uint32_t flags, SkResourceCache* cache) { 4620bd699e497819344083df4715928a54a597cd630Brian Salomon SkAutoCanvasRestore acr(canvas, true); 4635e6895295a88fb702f49309542149d73f709bb10Brian Salomon SkMatrix viewMatrix = canvas->getTotalMatrix(); 464cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth 465cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth // try circular fast path 466cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth SkRect rect; 467cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth if (viewMatrix.isSimilarity() && 468cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth path.isOval(&rect) && rect.width() == rect.height()) { 469cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth SkPaint newPaint; 470cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth newPaint.setColor(color); 471cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth if (ambientAlpha > 0) { 472cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth newPaint.setMaskFilter(SkAmbientShadowMaskFilter::Make(occluderHeight, ambientAlpha, 473cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth flags)); 474cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth canvas->drawPath(path, newPaint); 475cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth } 476cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth if (spotAlpha > 0) { 477cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth newPaint.setMaskFilter(SkSpotShadowMaskFilter::Make(occluderHeight, devLightPos, 478cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth lightRadius, spotAlpha, flags)); 479cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth canvas->drawPath(path, newPaint); 480cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth } 481cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth return; 482cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth } 483cf40e307cd7c78c3ac8812229a7f4f2796b8688eJim Van Verth 484efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth canvas->resetMatrix(); 485efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 4865e6895295a88fb702f49309542149d73f709bb10Brian Salomon ShadowedPath shadowedPath(&path, &viewMatrix); 4875e6895295a88fb702f49309542149d73f709bb10Brian Salomon 488958fbc460a1e680c6a9979e140da8bfc00b8831dBrian Salomon bool transparent = SkToBool(flags & SkShadowFlags::kTransparentOccluder_ShadowFlag); 489958fbc460a1e680c6a9979e140da8bfc00b8831dBrian Salomon 490efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth if (ambientAlpha > 0) { 4910bd699e497819344083df4715928a54a597cd630Brian Salomon ambientAlpha = SkTMin(ambientAlpha, 1.f); 4925e6895295a88fb702f49309542149d73f709bb10Brian Salomon AmbientVerticesFactory factory; 493b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth factory.fOccluderHeight = occluderHeight; 494b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth factory.fAmbientAlpha = ambientAlpha; 4955e6895295a88fb702f49309542149d73f709bb10Brian Salomon factory.fTransparent = transparent; 496efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 497804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon draw_shadow(factory, canvas, shadowedPath, color, cache); 498efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth } 499efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 500efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth if (spotAlpha > 0) { 5010bd699e497819344083df4715928a54a597cd630Brian Salomon spotAlpha = SkTMin(spotAlpha, 1.f); 5025e6895295a88fb702f49309542149d73f709bb10Brian Salomon SpotVerticesFactory factory; 5030bd699e497819344083df4715928a54a597cd630Brian Salomon float zRatio = SkTPin(occluderHeight / (devLightPos.fZ - occluderHeight), 0.0f, 0.95f); 504b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar radius = lightRadius * zRatio; 505efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 506efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth // Compute the scale and translation for the spot shadow. 507b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar scale = devLightPos.fZ / (devLightPos.fZ - occluderHeight); 508efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth 509efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth SkPoint center = SkPoint::Make(path.getBounds().centerX(), path.getBounds().centerY()); 5100bd699e497819344083df4715928a54a597cd630Brian Salomon viewMatrix.mapPoints(¢er, 1); 5110bd699e497819344083df4715928a54a597cd630Brian Salomon factory.fOffset = SkVector::Make(zRatio * (center.fX - devLightPos.fX), 5120bd699e497819344083df4715928a54a597cd630Brian Salomon zRatio * (center.fY - devLightPos.fY)); 513b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth factory.fOccluderHeight = occluderHeight; 514b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth factory.fDevLightPos = devLightPos; 515b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth factory.fLightRadius = lightRadius; 516b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth factory.fSpotAlpha = spotAlpha; 5175e6895295a88fb702f49309542149d73f709bb10Brian Salomon 518d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon SkRRect rrect; 519d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (transparent) { 520d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon factory.fOccluderType = SpotVerticesFactory::OccluderType::kTransparent; 521d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } else { 522d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon factory.fOccluderType = SpotVerticesFactory::OccluderType::kOpaque; 523d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (shadowedPath.isRRect(&rrect)) { 524d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon SkRRect devRRect; 525d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (rrect.transform(viewMatrix, &devRRect)) { 526b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar s = 1.f - scale; 527d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon SkScalar w = devRRect.width(); 528d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon SkScalar h = devRRect.height(); 529d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon SkScalar hw = w / 2.f; 530d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon SkScalar hh = h / 2.f; 531b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar umbraInsetX = s * hw + radius; 532b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar umbraInsetY = s * hh + radius; 53367386d44c77a1bef1cd9a896d779bd92ea03a558Brian Salomon // The umbra is inset by radius along the diagonal, so adjust for that. 53467386d44c77a1bef1cd9a896d779bd92ea03a558Brian Salomon SkScalar d = 1.f / SkScalarSqrt(hw * hw + hh * hh); 53567386d44c77a1bef1cd9a896d779bd92ea03a558Brian Salomon umbraInsetX *= hw * d; 53667386d44c77a1bef1cd9a896d779bd92ea03a558Brian Salomon umbraInsetY *= hh * d; 537d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon if (umbraInsetX > hw || umbraInsetY > hh) { 538d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // There is no umbra to occlude. 539d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon factory.fOccluderType = SpotVerticesFactory::OccluderType::kTransparent; 540d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } else if (fabsf(factory.fOffset.fX) < umbraInsetX && 541d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon fabsf(factory.fOffset.fY) < umbraInsetY) { 542d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon factory.fOccluderType = 543d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon SpotVerticesFactory::OccluderType::kOpaqueCoversUmbra; 544d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } else if (factory.fOffset.fX > w - umbraInsetX || 545d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon factory.fOffset.fY > h - umbraInsetY) { 546d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon // There umbra is fully exposed, there is nothing to omit. 547d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon factory.fOccluderType = SpotVerticesFactory::OccluderType::kTransparent; 548d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 549d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 550d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 551d1ac9823fd351ccb54f463273e5c34b6d719ea46Brian Salomon } 552a84898dbb8d8f7cb8c3e9bdfb4c31d85dff1922fJim Van Verth if (factory.fOccluderType == SpotVerticesFactory::OccluderType::kOpaque) { 553a84898dbb8d8f7cb8c3e9bdfb4c31d85dff1922fJim Van Verth factory.fOccluderType = SpotVerticesFactory::OccluderType::kTransparent; 554a84898dbb8d8f7cb8c3e9bdfb4c31d85dff1922fJim Van Verth } 555804e091df9879ad0f83a9b2f2216ed8ea8951489Brian Salomon draw_shadow(factory, canvas, shadowedPath, color, cache); 556efe3dedbb3493b738abdb56041b093245e4e8711Jim Van Verth } 55743475ad9dc43c4cbe13d924d8caff8916dcbbc06Jim Van Verth} 558b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth 559b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth// Draw an offset spot shadow and outlining ambient shadow for the given path, 560b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth// without caching and using a function based on local position to compute the height. 561b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verthvoid SkShadowUtils::DrawUncachedShadow(SkCanvas* canvas, const SkPath& path, 562b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth std::function<SkScalar(SkScalar, SkScalar)> heightFunc, 563b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth const SkPoint3& lightPos, SkScalar lightRadius, 564b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkScalar ambientAlpha, SkScalar spotAlpha, SkColor color, 565b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth uint32_t flags) { 566b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkAutoCanvasRestore acr(canvas, true); 567b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkMatrix viewMatrix = canvas->getTotalMatrix(); 568b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth canvas->resetMatrix(); 569b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth 570b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth bool transparent = SkToBool(flags & SkShadowFlags::kTransparentOccluder_ShadowFlag); 571b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth 572b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth if (ambientAlpha > 0) { 573b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth ambientAlpha = SkTMin(ambientAlpha, 1.f); 574b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth sk_sp<SkVertices> vertices = SkShadowTessellator::MakeAmbient(path, viewMatrix, 575b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth heightFunc, ambientAlpha, 576b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth transparent); 577b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkPaint paint; 578b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth // Run the vertex color through a GaussianColorFilter and then modulate the grayscale 579b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth // result of that against our 'color' param. 580b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth paint.setColorFilter(SkColorFilter::MakeComposeFilter( 581b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkColorFilter::MakeModeFilter(color, SkBlendMode::kModulate), 582b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkGaussianColorFilter::Make())); 583b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth canvas->drawVertices(vertices, SkBlendMode::kModulate, paint); 584b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth } 585b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth 586b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth if (spotAlpha > 0) { 587b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth spotAlpha = SkTMin(spotAlpha, 1.f); 588b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth sk_sp<SkVertices> vertices = SkShadowTessellator::MakeSpot(path, viewMatrix, heightFunc, 589b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth lightPos, lightRadius, 590b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth spotAlpha, transparent); 591b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkPaint paint; 592b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth // Run the vertex color through a GaussianColorFilter and then modulate the grayscale 593b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth // result of that against our 'color' param. 594b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth paint.setColorFilter(SkColorFilter::MakeComposeFilter( 595b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkColorFilter::MakeModeFilter(color, SkBlendMode::kModulate), 596b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth SkGaussianColorFilter::Make())); 597b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth canvas->drawVertices(vertices, SkBlendMode::kModulate, paint); 598b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth } 599b436655ad5c40a04b65c1642d0a0e781ce296c96Jim Van Verth} 600