1 /*
2 * Copyright 2013 The Android Open Source Project
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 "SkPictureImageFilter.h"
9 #include "SkDevice.h"
10 #include "SkCanvas.h"
11 #include "SkReadBuffer.h"
12 #include "SkSurfaceProps.h"
13 #include "SkWriteBuffer.h"
14 #include "SkValidationUtils.h"
15
SkPictureImageFilter(const SkPicture * picture)16 SkPictureImageFilter::SkPictureImageFilter(const SkPicture* picture)
17 : INHERITED(0, 0, nullptr)
18 , fPicture(SkSafeRef(picture))
19 , fCropRect(picture ? picture->cullRect() : SkRect::MakeEmpty())
20 , fPictureResolution(kDeviceSpace_PictureResolution)
21 , fFilterQuality(kLow_SkFilterQuality) {
22 }
23
SkPictureImageFilter(const SkPicture * picture,const SkRect & cropRect,PictureResolution pictureResolution,SkFilterQuality filterQuality)24 SkPictureImageFilter::SkPictureImageFilter(const SkPicture* picture, const SkRect& cropRect,
25 PictureResolution pictureResolution,
26 SkFilterQuality filterQuality)
27 : INHERITED(0, 0, nullptr)
28 , fPicture(SkSafeRef(picture))
29 , fCropRect(cropRect)
30 , fPictureResolution(pictureResolution)
31 , fFilterQuality(filterQuality) {
32 }
33
~SkPictureImageFilter()34 SkPictureImageFilter::~SkPictureImageFilter() {
35 SkSafeUnref(fPicture);
36 }
37
CreateProc(SkReadBuffer & buffer)38 SkFlattenable* SkPictureImageFilter::CreateProc(SkReadBuffer& buffer) {
39 SkAutoTUnref<SkPicture> picture;
40 SkRect cropRect;
41
42 if (buffer.isCrossProcess() && SkPicture::PictureIOSecurityPrecautionsEnabled()) {
43 buffer.validate(!buffer.readBool());
44 } else {
45 if (buffer.readBool()) {
46 picture.reset(SkPicture::CreateFromBuffer(buffer));
47 }
48 }
49 buffer.readRect(&cropRect);
50 PictureResolution pictureResolution;
51 if (buffer.isVersionLT(SkReadBuffer::kPictureImageFilterResolution_Version)) {
52 pictureResolution = kDeviceSpace_PictureResolution;
53 } else {
54 pictureResolution = (PictureResolution)buffer.readInt();
55 }
56
57 if (kLocalSpace_PictureResolution == pictureResolution) {
58 //filterLevel is only serialized if pictureResolution is LocalSpace
59 SkFilterQuality filterQuality;
60 if (buffer.isVersionLT(SkReadBuffer::kPictureImageFilterLevel_Version)) {
61 filterQuality = kLow_SkFilterQuality;
62 } else {
63 filterQuality = (SkFilterQuality)buffer.readInt();
64 }
65 return CreateForLocalSpace(picture, cropRect, filterQuality);
66 }
67 return Create(picture, cropRect);
68 }
69
flatten(SkWriteBuffer & buffer) const70 void SkPictureImageFilter::flatten(SkWriteBuffer& buffer) const {
71 if (buffer.isCrossProcess() && SkPicture::PictureIOSecurityPrecautionsEnabled()) {
72 buffer.writeBool(false);
73 } else {
74 bool hasPicture = (fPicture != nullptr);
75 buffer.writeBool(hasPicture);
76 if (hasPicture) {
77 fPicture->flatten(buffer);
78 }
79 }
80 buffer.writeRect(fCropRect);
81 buffer.writeInt(fPictureResolution);
82 if (kLocalSpace_PictureResolution == fPictureResolution) {
83 buffer.writeInt(fFilterQuality);
84 }
85 }
86
onFilterImageDeprecated(Proxy * proxy,const SkBitmap &,const Context & ctx,SkBitmap * result,SkIPoint * offset) const87 bool SkPictureImageFilter::onFilterImageDeprecated(Proxy* proxy, const SkBitmap&,
88 const Context& ctx,
89 SkBitmap* result, SkIPoint* offset) const {
90 if (!fPicture) {
91 offset->fX = offset->fY = 0;
92 return true;
93 }
94
95 SkRect floatBounds;
96 ctx.ctm().mapRect(&floatBounds, fCropRect);
97 SkIRect bounds = floatBounds.roundOut();
98 if (!bounds.intersect(ctx.clipBounds())) {
99 return false;
100 }
101
102 if (bounds.isEmpty()) {
103 offset->fX = offset->fY = 0;
104 return true;
105 }
106
107 SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
108 if (nullptr == device.get()) {
109 return false;
110 }
111
112 if (kDeviceSpace_PictureResolution == fPictureResolution ||
113 0 == (ctx.ctm().getType() & ~SkMatrix::kTranslate_Mask)) {
114 this->drawPictureAtDeviceResolution(device.get(), bounds, ctx);
115 } else {
116 this->drawPictureAtLocalResolution(proxy, device.get(), bounds, ctx);
117 }
118
119 *result = device.get()->accessBitmap(false);
120 offset->fX = bounds.fLeft;
121 offset->fY = bounds.fTop;
122 return true;
123 }
124
drawPictureAtDeviceResolution(SkBaseDevice * device,const SkIRect & deviceBounds,const Context & ctx) const125 void SkPictureImageFilter::drawPictureAtDeviceResolution(SkBaseDevice* device,
126 const SkIRect& deviceBounds,
127 const Context& ctx) const {
128 SkCanvas canvas(device);
129
130 canvas.translate(-SkIntToScalar(deviceBounds.fLeft), -SkIntToScalar(deviceBounds.fTop));
131 canvas.concat(ctx.ctm());
132 canvas.drawPicture(fPicture);
133 }
134
drawPictureAtLocalResolution(Proxy * proxy,SkBaseDevice * device,const SkIRect & deviceBounds,const Context & ctx) const135 void SkPictureImageFilter::drawPictureAtLocalResolution(Proxy* proxy, SkBaseDevice* device,
136 const SkIRect& deviceBounds,
137 const Context& ctx) const {
138 SkMatrix inverseCtm;
139 if (!ctx.ctm().invert(&inverseCtm)) {
140 return;
141 }
142
143 SkRect localBounds = SkRect::Make(ctx.clipBounds());
144 inverseCtm.mapRect(&localBounds);
145 if (!localBounds.intersect(fCropRect)) {
146 return;
147 }
148 SkIRect localIBounds = localBounds.roundOut();
149 SkAutoTUnref<SkBaseDevice> localDevice(proxy->createDevice(localIBounds.width(), localIBounds.height()));
150
151 SkCanvas localCanvas(localDevice);
152 localCanvas.translate(-SkIntToScalar(localIBounds.fLeft), -SkIntToScalar(localIBounds.fTop));
153 localCanvas.drawPicture(fPicture);
154
155 SkCanvas canvas(device);
156
157 canvas.translate(-SkIntToScalar(deviceBounds.fLeft), -SkIntToScalar(deviceBounds.fTop));
158 canvas.concat(ctx.ctm());
159 SkPaint paint;
160 paint.setFilterQuality(fFilterQuality);
161 canvas.drawBitmap(localDevice.get()->accessBitmap(false), SkIntToScalar(localIBounds.fLeft),
162 SkIntToScalar(localIBounds.fTop), &paint);
163 }
164
165 #ifndef SK_IGNORE_TO_STRING
toString(SkString * str) const166 void SkPictureImageFilter::toString(SkString* str) const {
167 str->appendf("SkPictureImageFilter: (");
168 str->appendf("crop: (%f,%f,%f,%f) ",
169 fCropRect.fLeft, fCropRect.fTop, fCropRect.fRight, fCropRect.fBottom);
170 if (fPicture) {
171 str->appendf("picture: (%f,%f,%f,%f)",
172 fPicture->cullRect().fLeft, fPicture->cullRect().fTop,
173 fPicture->cullRect().fRight, fPicture->cullRect().fBottom);
174 }
175 str->append(")");
176 }
177 #endif
178