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- /*
- * Copyright 2012 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/GrPath.h"
- #include "src/gpu/geometry/GrShape.h"
- static inline void write_style_key(uint32_t* key, const GrStyle& style) {
- // Pass 1 for the scale since the GPU will apply the style not GrStyle::applyToPath().
- GrStyle::WriteKey(key, style, GrStyle::Apply::kPathEffectAndStrokeRec, SK_Scalar1);
- }
- void GrPath::ComputeKey(const GrShape& shape, GrUniqueKey* key, bool* outIsVolatile) {
- int geoCnt = shape.unstyledKeySize();
- int styleCnt = GrStyle::KeySize(shape.style(), GrStyle::Apply::kPathEffectAndStrokeRec);
- // This should only fail for an arbitrary path effect, and we should not have gotten
- // here with anything other than a dash path effect.
- SkASSERT(styleCnt >= 0);
- if (geoCnt < 0) {
- *outIsVolatile = true;
- return;
- }
- static const GrUniqueKey::Domain kGeneralPathDomain = GrUniqueKey::GenerateDomain();
- GrUniqueKey::Builder builder(key, kGeneralPathDomain, geoCnt + styleCnt, "Path");
- shape.writeUnstyledKey(&builder[0]);
- if (styleCnt) {
- write_style_key(&builder[geoCnt], shape.style());
- }
- *outIsVolatile = false;
- }
- #ifdef SK_DEBUG
- bool GrPath::isEqualTo(const SkPath& path, const GrStyle& style) const {
- // Since this is only called in debug we don't care about performance.
- int cnt0 = GrStyle::KeySize(fStyle, GrStyle::Apply::kPathEffectAndStrokeRec);
- int cnt1 = GrStyle::KeySize(style, GrStyle::Apply::kPathEffectAndStrokeRec);
- if (cnt0 < 0 || cnt1 < 0 || cnt0 != cnt1) {
- return false;
- }
- if (cnt0) {
- SkAutoTArray<uint32_t> key0(cnt0);
- SkAutoTArray<uint32_t> key1(cnt0);
- write_style_key(key0.get(), fStyle);
- write_style_key(key1.get(), style);
- if (0 != memcmp(key0.get(), key1.get(), cnt0)) {
- return false;
- }
- }
- return fSkPath == path;
- }
- #endif
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