bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "GrShape.h" |
| 9 | |
| 10 | GrShape& GrShape::operator=(const GrShape& that) { |
| 11 | bool wasPath = Type::kPath == fType; |
| 12 | fStyle = that.fStyle; |
| 13 | fType = that.fType; |
| 14 | switch (fType) { |
| 15 | case Type::kEmpty: |
| 16 | if (wasPath) { |
| 17 | fPath.reset(); |
| 18 | } |
| 19 | break; |
| 20 | case Type::kRRect: |
| 21 | if (wasPath) { |
| 22 | fPath.reset(); |
| 23 | } |
| 24 | fRRect = that.fRRect; |
| 25 | break; |
| 26 | case Type::kPath: |
| 27 | if (wasPath) { |
| 28 | *fPath.get() = *that.fPath.get(); |
| 29 | } else { |
| 30 | fPath.set(*that.fPath.get()); |
| 31 | } |
| 32 | break; |
| 33 | } |
| 34 | fInheritedKey.reset(that.fInheritedKey.count()); |
| 35 | memcpy(fInheritedKey.get(), that.fInheritedKey.get(), |
| 36 | sizeof(uint32_t) * fInheritedKey.count()); |
| 37 | return *this; |
| 38 | } |
| 39 | |
| 40 | int GrShape::unstyledKeySize() const { |
| 41 | if (fInheritedKey.count()) { |
| 42 | return fInheritedKey.count(); |
| 43 | } |
| 44 | switch (fType) { |
| 45 | case Type::kEmpty: |
| 46 | return 1; |
| 47 | case Type::kRRect: |
| 48 | SkASSERT(!fInheritedKey.count()); |
| 49 | SkASSERT(0 == SkRRect::kSizeInMemory % sizeof(uint32_t)); |
| 50 | return SkRRect::kSizeInMemory / sizeof(uint32_t); |
| 51 | case Type::kPath: |
| 52 | if (fPath.get()->isVolatile()) { |
| 53 | return -1; |
| 54 | } else { |
| 55 | return 1; |
| 56 | } |
| 57 | } |
| 58 | SkFAIL("Should never get here."); |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | void GrShape::writeUnstyledKey(uint32_t* key) const { |
| 63 | SkASSERT(this->unstyledKeySize()); |
| 64 | SkDEBUGCODE(uint32_t* origKey = key;) |
| 65 | if (fInheritedKey.count()) { |
| 66 | memcpy(key, fInheritedKey.get(), sizeof(uint32_t) * fInheritedKey.count()); |
| 67 | SkDEBUGCODE(key += fInheritedKey.count();) |
| 68 | } else { |
| 69 | switch (fType) { |
| 70 | case Type::kEmpty: |
| 71 | *key++ = 1; |
| 72 | break; |
| 73 | case Type::kRRect: |
| 74 | fRRect.writeToMemory(key); |
| 75 | key += SkRRect::kSizeInMemory / sizeof(uint32_t); |
| 76 | break; |
| 77 | case Type::kPath: |
| 78 | SkASSERT(!fPath.get()->isVolatile()); |
| 79 | *key++ = fPath.get()->getGenerationID(); |
| 80 | break; |
| 81 | } |
| 82 | } |
| 83 | SkASSERT(key - origKey == this->unstyledKeySize()); |
| 84 | } |
| 85 | |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 86 | void GrShape::setInheritedKey(const GrShape &parent, GrStyle::Apply apply) { |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 87 | SkASSERT(!fInheritedKey.count()); |
| 88 | // If the output shape turns out to be simple, then we will just use its geometric key |
| 89 | if (Type::kPath == fType) { |
| 90 | // We want ApplyFullStyle(ApplyPathEffect(shape)) to have the same key as |
| 91 | // ApplyFullStyle(shape). |
| 92 | // The full key is structured as (geo,path_effect,stroke). |
| 93 | // If we do ApplyPathEffect we get get,path_effect as the inherited key. If we then |
| 94 | // do ApplyFullStyle we'll memcpy geo,path_effect into the new inherited key |
| 95 | // and then append the style key (which should now be stroke only) at the end. |
| 96 | int parentCnt = parent.fInheritedKey.count(); |
| 97 | bool useParentGeoKey = !parentCnt; |
| 98 | if (useParentGeoKey) { |
| 99 | parentCnt = parent.unstyledKeySize(); |
bsalomon | 72dc51c | 2016-04-27 06:46:23 -0700 | [diff] [blame] | 100 | if (parentCnt < 0) { |
| 101 | // The parent's geometry has no key so we will have no key. |
| 102 | fPath.get()->setIsVolatile(true); |
| 103 | return; |
| 104 | } |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 105 | } |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 106 | int styleCnt = GrStyle::KeySize(parent.fStyle, apply); |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 107 | if (styleCnt < 0) { |
| 108 | // The style doesn't allow a key, set the path to volatile so that we fail when |
| 109 | // we try to get a key for the shape. |
| 110 | fPath.get()->setIsVolatile(true); |
bsalomon | 72dc51c | 2016-04-27 06:46:23 -0700 | [diff] [blame] | 111 | return; |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 112 | } |
bsalomon | 72dc51c | 2016-04-27 06:46:23 -0700 | [diff] [blame] | 113 | fInheritedKey.reset(parentCnt + styleCnt); |
| 114 | if (useParentGeoKey) { |
| 115 | // This will be the geo key. |
| 116 | parent.writeUnstyledKey(fInheritedKey.get()); |
| 117 | } else { |
| 118 | // This should be (geo,path_effect). |
| 119 | memcpy(fInheritedKey.get(), parent.fInheritedKey.get(), |
| 120 | parentCnt * sizeof(uint32_t)); |
| 121 | } |
| 122 | // Now turn (geo,path_effect) or (geo) into (geo,path_effect,stroke) |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 123 | GrStyle::WriteKey(fInheritedKey.get() + parentCnt, parent.fStyle, apply); |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 124 | } |
| 125 | } |
| 126 | |
| 127 | GrShape::GrShape(const GrShape& that) : fType(that.fType), fStyle(that.fStyle) { |
| 128 | switch (fType) { |
| 129 | case Type::kEmpty: |
| 130 | return; |
| 131 | case Type::kRRect: |
| 132 | fRRect = that.fRRect; |
| 133 | return; |
| 134 | case Type::kPath: |
| 135 | fPath.set(*that.fPath.get()); |
| 136 | return; |
| 137 | } |
| 138 | fInheritedKey.reset(that.fInheritedKey.count()); |
| 139 | memcpy(fInheritedKey.get(), that.fInheritedKey.get(), |
| 140 | sizeof(uint32_t) * fInheritedKey.count()); |
| 141 | } |
| 142 | |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 143 | GrShape::GrShape(const GrShape& parent, GrStyle::Apply apply) { |
| 144 | if (!parent.style().applies() || |
| 145 | (GrStyle::Apply::kPathEffectOnly == apply && !parent.style().pathEffect())) { |
| 146 | fType = Type::kEmpty; |
| 147 | *this = parent; |
| 148 | return; |
| 149 | } |
| 150 | |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 151 | SkPathEffect* pe = parent.fStyle.pathEffect(); |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 152 | SkTLazy<SkPath> tmpPath; |
| 153 | const GrShape* parentForKey = &parent; |
| 154 | SkTLazy<GrShape> tmpParent; |
| 155 | fType = Type::kPath; |
| 156 | fPath.init(); |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 157 | if (pe) { |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 158 | SkPath* srcForPathEffect; |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 159 | if (parent.fType == Type::kPath) { |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 160 | srcForPathEffect = parent.fPath.get(); |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 161 | } else { |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 162 | srcForPathEffect = tmpPath.init(); |
| 163 | parent.asPath(tmpPath.get()); |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 164 | } |
| 165 | // Should we consider bounds? Would have to include in key, but it'd be nice to know |
| 166 | // if the bounds actually modified anything before including in key. |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 167 | SkStrokeRec strokeRec = parent.fStyle.strokeRec(); |
| 168 | if (!pe->filterPath(fPath.get(), *srcForPathEffect, &strokeRec, nullptr)) { |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 169 | // Make an empty unstyled shape if filtering fails. |
| 170 | fType = Type::kEmpty; |
| 171 | fStyle = GrStyle(); |
| 172 | fPath.reset(); |
| 173 | return; |
| 174 | } |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 175 | if (GrStyle::Apply::kPathEffectAndStrokeRec == apply) { |
| 176 | if (strokeRec.needToApply()) { |
| 177 | // The intermediate shape may not be a general path. If we we're just applying |
| 178 | // the path effect then attemptToReduceFromPath would catch it. This means that |
| 179 | // when we subsequently applied the remaining strokeRec we would have a non-path |
| 180 | // parent shape that would be used to determine the the stroked path's key. |
| 181 | // We detect that case here and change parentForKey to a temporary that represents |
| 182 | // the simpler shape so that applying both path effect and the strokerec all at |
| 183 | // once produces the same key. |
| 184 | SkRRect rrect; |
| 185 | Type parentType = AttemptToReduceFromPathImpl(*fPath.get(), &rrect, nullptr, |
| 186 | strokeRec); |
| 187 | switch (parentType) { |
| 188 | case Type::kEmpty: |
| 189 | tmpParent.init(); |
| 190 | parentForKey = tmpParent.get(); |
| 191 | break; |
| 192 | case Type::kRRect: |
| 193 | tmpParent.init(rrect, GrStyle(strokeRec, nullptr)); |
| 194 | parentForKey = tmpParent.get(); |
| 195 | case Type::kPath: |
| 196 | break; |
| 197 | } |
| 198 | SkAssertResult(strokeRec.applyToPath(fPath.get(), *fPath.get())); |
| 199 | } else { |
| 200 | fStyle = GrStyle(strokeRec, nullptr); |
bsalomon | 72dc51c | 2016-04-27 06:46:23 -0700 | [diff] [blame] | 201 | } |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 202 | } else { |
| 203 | fStyle = GrStyle(strokeRec, nullptr); |
bsalomon | 72dc51c | 2016-04-27 06:46:23 -0700 | [diff] [blame] | 204 | } |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 205 | } else { |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 206 | const SkPath* srcForStrokeRec; |
| 207 | if (parent.fType == Type::kPath) { |
| 208 | srcForStrokeRec = parent.fPath.get(); |
| 209 | } else { |
| 210 | srcForStrokeRec = tmpPath.init(); |
| 211 | parent.asPath(tmpPath.get()); |
| 212 | } |
| 213 | SkASSERT(parent.fStyle.strokeRec().needToApply()); |
| 214 | SkAssertResult(parent.fStyle.strokeRec().applyToPath(fPath.get(), *srcForStrokeRec)); |
| 215 | fStyle.resetToInitStyle(SkStrokeRec::kFill_InitStyle); |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 216 | } |
bsalomon | 72dc51c | 2016-04-27 06:46:23 -0700 | [diff] [blame] | 217 | this->attemptToReduceFromPath(); |
bsalomon | fb08327 | 2016-05-04 08:27:41 -0700 | [diff] [blame^] | 218 | this->setInheritedKey(*parentForKey, apply); |
bsalomon | 47cc769 | 2016-04-26 12:56:00 -0700 | [diff] [blame] | 219 | } |