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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 "GrPath.h"
#include "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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