1/*
2 * Copyright 2015 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#ifndef SkPictureCommon_DEFINED
9#define SkPictureCommon_DEFINED
10
11// Some shared code used by both SkBigPicture and SkMiniPicture.
12// SkTextHunter -- SkRecord visitor that returns true when the op draws text.
13// SkPathCounter -- SkRecord visitor that counts paths that draw slowly on the GPU.
14
15#include "include/core/SkPathEffect.h"
16#include "include/core/SkShader.h"
17#include "include/private/SkTLogic.h"
18#include "src/core/SkRecords.h"
19
20// TODO: might be nicer to have operator() return an int (the number of slow paths) ?
21struct SkPathCounter {
22 // Some ops have a paint, some have an optional paint. Either way, get back a pointer.
23 static const SkPaint* AsPtr(const SkPaint& p) { return &p; }
24 static const SkPaint* AsPtr(const SkRecords::Optional<SkPaint>& p) { return p; }
25
26 SkPathCounter() : fNumSlowPathsAndDashEffects(0) {}
27
28 void checkPaint(const SkPaint* paint) {
29 if (paint && paint->getPathEffect()) {
30 // Initially assume it's slow.
31 fNumSlowPathsAndDashEffects++;
32 }
33 }
34
35 void operator()(const SkRecords::DrawPoints& op) {
36 this->checkPaint(&op.paint);
37 const SkPathEffect* effect = op.paint.getPathEffect();
38 if (effect) {
39 SkPathEffect::DashInfo info;
40 SkPathEffect::DashType dashType = effect->asADash(&info);
41 if (2 == op.count && SkPaint::kRound_Cap != op.paint.getStrokeCap() &&
42 SkPathEffect::kDash_DashType == dashType && 2 == info.fCount) {
43 fNumSlowPathsAndDashEffects--;
44 }
45 }
46 }
47
48 void operator()(const SkRecords::DrawPath& op) {
49 this->checkPaint(&op.paint);
50 if (op.paint.isAntiAlias() && !op.path.isConvex()) {
51 SkPaint::Style paintStyle = op.paint.getStyle();
52 const SkRect& pathBounds = op.path.getBounds();
53 if (SkPaint::kStroke_Style == paintStyle &&
54 0 == op.paint.getStrokeWidth()) {
55 // AA hairline concave path is not slow.
56 } else if (SkPaint::kFill_Style == paintStyle && pathBounds.width() < 64.f &&
57 pathBounds.height() < 64.f && !op.path.isVolatile()) {
58 // AADF eligible concave path is not slow.
59 } else {
60 fNumSlowPathsAndDashEffects++;
61 }
62 }
63 }
64
65 void operator()(const SkRecords::ClipPath& op) {
66 // TODO: does the SkRegion op matter?
67 if (op.opAA.aa() && !op.path.isConvex()) {
68 fNumSlowPathsAndDashEffects++;
69 }
70 }
71
72 void operator()(const SkRecords::SaveLayer& op) {
73 this->checkPaint(AsPtr(op.paint));
74 }
75
76 template <typename T>
77 std::enable_if_t<T::kTags & SkRecords::kHasPaint_Tag, void> operator()(const T& op) {
78 this->checkPaint(AsPtr(op.paint));
79 }
80
81 template <typename T>
82 std::enable_if_t<!(T::kTags & SkRecords::kHasPaint_Tag), void>
83 operator()(const T& op) { /* do nothing */ }
84
85 int fNumSlowPathsAndDashEffects;
86};
87
88sk_sp<SkImage> ImageDeserializer_SkDeserialImageProc(const void*, size_t, void* imagedeserializer);
89
90bool SkPicture_StreamIsSKP(SkStream*, SkPictInfo*);
91
92#endif // SkPictureCommon_DEFINED
93