1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "Picture.h"
18 #include "SkStream.h"
19
20 #include <memory>
21 #include <hwui/Canvas.h>
22
23 namespace android {
24
Picture(const Picture * src)25 Picture::Picture(const Picture* src) {
26 if (NULL != src) {
27 mWidth = src->width();
28 mHeight = src->height();
29 if (NULL != src->mPicture.get()) {
30 mPicture = src->mPicture;
31 } else if (NULL != src->mRecorder.get()) {
32 mPicture = src->makePartialCopy();
33 }
34 } else {
35 mWidth = 0;
36 mHeight = 0;
37 }
38 }
39
Picture(sk_sp<SkPicture> && src)40 Picture::Picture(sk_sp<SkPicture>&& src) {
41 mPicture = std::move(src);
42 mWidth = 0;
43 mHeight = 0;
44 }
45
beginRecording(int width,int height)46 Canvas* Picture::beginRecording(int width, int height) {
47 mPicture.reset(NULL);
48 mRecorder.reset(new SkPictureRecorder);
49 mWidth = width;
50 mHeight = height;
51 SkCanvas* canvas = mRecorder->beginRecording(SkIntToScalar(width), SkIntToScalar(height));
52 return Canvas::create_canvas(canvas);
53 }
54
endRecording()55 void Picture::endRecording() {
56 if (NULL != mRecorder.get()) {
57 mPicture = mRecorder->finishRecordingAsPicture();
58 mRecorder.reset(NULL);
59 }
60 }
61
width() const62 int Picture::width() const {
63 return mWidth;
64 }
65
height() const66 int Picture::height() const {
67 return mHeight;
68 }
69
CreateFromStream(SkStream * stream)70 Picture* Picture::CreateFromStream(SkStream* stream) {
71 Picture* newPict = new Picture;
72
73 sk_sp<SkPicture> skPicture = SkPicture::MakeFromStream(stream);
74 if (NULL != skPicture) {
75 newPict->mPicture = skPicture;
76
77 const SkIRect cullRect = skPicture->cullRect().roundOut();
78 newPict->mWidth = cullRect.width();
79 newPict->mHeight = cullRect.height();
80 }
81
82 return newPict;
83 }
84
serialize(SkWStream * stream) const85 void Picture::serialize(SkWStream* stream) const {
86 if (NULL != mRecorder.get()) {
87 this->makePartialCopy()->serialize(stream);
88 } else if (NULL != mPicture.get()) {
89 mPicture->serialize(stream);
90 } else {
91 // serialize "empty" picture
92 SkPictureRecorder recorder;
93 recorder.beginRecording(0, 0);
94 recorder.finishRecordingAsPicture()->serialize(stream);
95 }
96 }
97
draw(Canvas * canvas)98 void Picture::draw(Canvas* canvas) {
99 if (NULL != mRecorder.get()) {
100 this->endRecording();
101 SkASSERT(NULL != mPicture.get());
102 }
103 if (NULL != mPicture.get()) {
104 mPicture->playback(canvas->asSkCanvas());
105 }
106 }
107
makePartialCopy() const108 sk_sp<SkPicture> Picture::makePartialCopy() const {
109 SkASSERT(NULL != mRecorder.get());
110
111 SkPictureRecorder reRecorder;
112
113 SkCanvas* canvas = reRecorder.beginRecording(mWidth, mHeight, NULL, 0);
114 mRecorder->partialReplay(canvas);
115 return reRecorder.finishRecordingAsPicture();
116 }
117
118 }; // namespace android
119