1 /* 2 * Copyright 2012 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 "GrPath.h" 9 #include "GrShape.h" 10 11 static inline void write_style_key(uint32_t* key, const GrStyle& style) { 12 // Pass 1 for the scale since the GPU will apply the style not GrStyle::applyToPath(). 13 GrStyle::WriteKey(key, style, GrStyle::Apply::kPathEffectAndStrokeRec, SK_Scalar1); 14 } 15 16 17 void GrPath::ComputeKey(const GrShape& shape, GrUniqueKey* key, bool* outIsVolatile) { 18 int geoCnt = shape.unstyledKeySize(); 19 int styleCnt = GrStyle::KeySize(shape.style(), GrStyle::Apply::kPathEffectAndStrokeRec); 20 // This should only fail for an arbitrary path effect, and we should not have gotten 21 // here with anything other than a dash path effect. 22 SkASSERT(styleCnt >= 0); 23 if (geoCnt < 0) { 24 *outIsVolatile = true; 25 return; 26 } 27 static const GrUniqueKey::Domain kGeneralPathDomain = GrUniqueKey::GenerateDomain(); 28 GrUniqueKey::Builder builder(key, kGeneralPathDomain, geoCnt + styleCnt); 29 shape.writeUnstyledKey(&builder[0]); 30 if (styleCnt) { 31 write_style_key(&builder[geoCnt], shape.style()); 32 } 33 *outIsVolatile = false; 34 } 35 36 #ifdef SK_DEBUG 37 bool GrPath::isEqualTo(const SkPath& path, const GrStyle& style) const { 38 // Since this is only called in debug we don't care about performance. 39 int cnt0 = GrStyle::KeySize(fStyle, GrStyle::Apply::kPathEffectAndStrokeRec); 40 int cnt1 = GrStyle::KeySize(style, GrStyle::Apply::kPathEffectAndStrokeRec); 41 if (cnt0 < 0 || cnt1 < 0 || cnt0 != cnt1) { 42 return false; 43 } 44 if (cnt0) { 45 SkAutoTArray<uint32_t> key0(cnt0); 46 SkAutoTArray<uint32_t> key1(cnt0); 47 write_style_key(key0.get(), fStyle); 48 write_style_key(key1.get(), style); 49 if (0 != memcmp(key0.get(), key1.get(), cnt0)) { 50 return false; 51 } 52 } 53 return fSkPath == path; 54 } 55 #endif 56
