/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkPictureCommon_DEFINED
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#define SkPictureCommon_DEFINED
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// Some shared code used by both SkBigPicture and SkMiniPicture.
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// SkTextHunter -- SkRecord visitor that returns true when the op draws text.
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// SkPathCounter -- SkRecord visitor that counts paths that draw slowly on the GPU.
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#include "SkPathEffect.h"
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#include "SkRecords.h"
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#include "SkShader.h"
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#include "SkTLogic.h"
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// TODO: might be nicer to have operator() return an int (the number of slow paths) ?
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struct SkPathCounter {
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// Some ops have a paint, some have an optional paint. Either way, get back a pointer.
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static const SkPaint* AsPtr(const SkPaint& p) { return &p; }
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static const SkPaint* AsPtr(const SkRecords::Optional<SkPaint>& p) { return p; }
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SkPathCounter() : fNumSlowPathsAndDashEffects(0) {}
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void checkPaint(const SkPaint* paint) {
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if (paint && paint->getPathEffect()) {
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// Initially assume it's slow.
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fNumSlowPathsAndDashEffects++;
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}
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}
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void operator()(const SkRecords::DrawPoints& op) {
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this->checkPaint(&op.paint);
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const SkPathEffect* effect = op.paint.getPathEffect();
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if (effect) {
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SkPathEffect::DashInfo info;
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SkPathEffect::DashType dashType = effect->asADash(&info);
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if (2 == op.count && SkPaint::kRound_Cap != op.paint.getStrokeCap() &&
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SkPathEffect::kDash_DashType == dashType && 2 == info.fCount) {
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fNumSlowPathsAndDashEffects--;
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}
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}
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}
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void operator()(const SkRecords::DrawPath& op) {
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this->checkPaint(&op.paint);
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if (op.paint.isAntiAlias() && !op.path.isConvex()) {
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SkPaint::Style paintStyle = op.paint.getStyle();
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const SkRect& pathBounds = op.path.getBounds();
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if (SkPaint::kStroke_Style == paintStyle &&
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0 == op.paint.getStrokeWidth()) {
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// AA hairline concave path is not slow.
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} else if (SkPaint::kFill_Style == paintStyle && pathBounds.width() < 64.f &&
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pathBounds.height() < 64.f && !op.path.isVolatile()) {
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// AADF eligible concave path is not slow.
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} else {
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fNumSlowPathsAndDashEffects++;
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}
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}
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}
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void operator()(const SkRecords::ClipPath& op) {
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// TODO: does the SkRegion op matter?
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if (op.opAA.aa() && !op.path.isConvex()) {
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fNumSlowPathsAndDashEffects++;
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}
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}
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void operator()(const SkRecords::SaveLayer& op) {
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this->checkPaint(AsPtr(op.paint));
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}
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template <typename T>
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SK_WHEN(T::kTags & SkRecords::kHasPaint_Tag, void) operator()(const T& op) {
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this->checkPaint(AsPtr(op.paint));
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}
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template <typename T>
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SK_WHEN(!(T::kTags & SkRecords::kHasPaint_Tag), void)
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operator()(const T& op) { /* do nothing */ }
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int fNumSlowPathsAndDashEffects;
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};
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sk_sp<SkImage> ImageDeserializer_SkDeserialImageProc(const void*, size_t, void* imagedeserializer);
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bool SkPicture_StreamIsSKP(SkStream*, SkPictInfo*);
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#endif // SkPictureCommon_DEFINED
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