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 "Canvas.h"
18 #include "Picture.h"
19
20 #include "SkStream.h"
21
22 namespace android {
23
Picture(const Picture * src)24 Picture::Picture(const Picture* src) {
25 if (NULL != src) {
26 mWidth = src->width();
27 mHeight = src->height();
28 if (NULL != src->mPicture.get()) {
29 mPicture.reset(SkRef(src->mPicture.get()));
30 } if (NULL != src->mRecorder.get()) {
31 mPicture.reset(src->makePartialCopy());
32 }
33 } else {
34 mWidth = 0;
35 mHeight = 0;
36 }
37 }
38
beginRecording(int width,int height)39 Canvas* Picture::beginRecording(int width, int height) {
40 mPicture.reset(NULL);
41 mRecorder.reset(new SkPictureRecorder);
42 mWidth = width;
43 mHeight = height;
44 SkCanvas* canvas = mRecorder->beginRecording(width, height, NULL, 0);
45 // the java side will wrap this guy in a Canvas.java, which will call
46 // unref in its finalizer, so we have to ref it here, so that both that
47 // Canvas.java and our picture can both be owners
48 canvas->ref();
49 return Canvas::create_canvas(canvas);
50 }
51
endRecording()52 void Picture::endRecording() {
53 if (NULL != mRecorder.get()) {
54 mPicture.reset(mRecorder->endRecording());
55 mRecorder.reset(NULL);
56 }
57 }
58
width() const59 int Picture::width() const {
60 if (NULL != mPicture.get()) {
61 SkASSERT(mPicture->width() == mWidth);
62 SkASSERT(mPicture->height() == mHeight);
63 }
64
65 return mWidth;
66 }
67
height() const68 int Picture::height() const {
69 if (NULL != mPicture.get()) {
70 SkASSERT(mPicture->width() == mWidth);
71 SkASSERT(mPicture->height() == mHeight);
72 }
73
74 return mHeight;
75 }
76
CreateFromStream(SkStream * stream)77 Picture* Picture::CreateFromStream(SkStream* stream) {
78 Picture* newPict = new Picture;
79
80 newPict->mPicture.reset(SkPicture::CreateFromStream(stream));
81 if (NULL != newPict->mPicture.get()) {
82 newPict->mWidth = newPict->mPicture->width();
83 newPict->mHeight = newPict->mPicture->height();
84 }
85
86 return newPict;
87 }
88
serialize(SkWStream * stream) const89 void Picture::serialize(SkWStream* stream) const {
90 if (NULL != mRecorder.get()) {
91 SkAutoTDelete<SkPicture> tempPict(this->makePartialCopy());
92 tempPict->serialize(stream);
93 } else if (NULL != mPicture.get()) {
94 mPicture->serialize(stream);
95 } else {
96 SkPicture empty;
97 empty.serialize(stream);
98 }
99 }
100
draw(Canvas * canvas)101 void Picture::draw(Canvas* canvas) {
102 if (NULL != mRecorder.get()) {
103 this->endRecording();
104 SkASSERT(NULL != mPicture.get());
105 }
106 if (NULL != mPicture.get()) {
107 // TODO: remove this const_cast once pictures are immutable
108 const_cast<SkPicture*>(mPicture.get())->draw(canvas->getSkCanvas());
109 }
110 }
111
makePartialCopy() const112 SkPicture* Picture::makePartialCopy() const {
113 SkASSERT(NULL != mRecorder.get());
114
115 SkPictureRecorder reRecorder;
116
117 SkCanvas* canvas = reRecorder.beginRecording(mWidth, mHeight, NULL, 0);
118 mRecorder->partialReplay(canvas);
119 return reRecorder.endRecording();
120 }
121
122 }; // namespace android
123