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
23namespace android {
24
25Picture::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        validate();
35    } else {
36        mWidth = 0;
37        mHeight = 0;
38    }
39}
40
41Canvas* Picture::beginRecording(int width, int height) {
42    mPicture.reset(NULL);
43    mRecorder.reset(new SkPictureRecorder);
44    mWidth = width;
45    mHeight = height;
46    SkCanvas* canvas = mRecorder->beginRecording(SkIntToScalar(width), SkIntToScalar(height));
47    return Canvas::create_canvas(canvas, Canvas::XformToSRGB::kDefer);
48}
49
50void Picture::endRecording() {
51    if (NULL != mRecorder.get()) {
52        mPicture = mRecorder->finishRecordingAsPicture();
53        validate();
54        mRecorder.reset(NULL);
55    }
56}
57
58int Picture::width() const {
59    validate();
60    return mWidth;
61}
62
63int Picture::height() const {
64    validate();
65    return mHeight;
66}
67
68Picture* Picture::CreateFromStream(SkStream* stream) {
69    Picture* newPict = new Picture;
70
71    sk_sp<SkPicture> skPicture = SkPicture::MakeFromStream(stream);
72    if (NULL != skPicture) {
73        newPict->mPicture = skPicture;
74
75        const SkIRect cullRect = skPicture->cullRect().roundOut();
76        newPict->mWidth = cullRect.width();
77        newPict->mHeight = cullRect.height();
78    }
79
80    return newPict;
81}
82
83void Picture::serialize(SkWStream* stream) const {
84    if (NULL != mRecorder.get()) {
85        this->makePartialCopy()->serialize(stream);
86    } else if (NULL != mPicture.get()) {
87        validate();
88        mPicture->serialize(stream);
89    } else {
90        // serialize "empty" picture
91        SkPictureRecorder recorder;
92        recorder.beginRecording(0, 0);
93        recorder.finishRecordingAsPicture()->serialize(stream);
94    }
95}
96
97void Picture::draw(Canvas* canvas) {
98    if (NULL != mRecorder.get()) {
99        this->endRecording();
100        SkASSERT(NULL != mPicture.get());
101    }
102    validate();
103    if (NULL != mPicture.get()) {
104        mPicture->playback(canvas->asSkCanvas());
105    }
106}
107
108sk_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
118void Picture::validate() const {
119#ifdef SK_DEBUG
120    if (NULL != mPicture.get()) {
121        SkRect cullRect = mPicture->cullRect();
122        SkRect myRect = SkRect::MakeWH(SkIntToScalar(mWidth), SkIntToScalar(mHeight));
123        SkASSERT(cullRect == myRect);
124    }
125#endif
126}
127
128}; // namespace android
129