1 /*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "platform/graphics/GraphicsContextRecorder.h"
33
34 #include "platform/graphics/ImageBuffer.h"
35 #include "platform/graphics/ImageSource.h"
36 #include "platform/graphics/LoggingCanvas.h"
37 #include "platform/graphics/ProfilingCanvas.h"
38 #include "platform/graphics/ReplayingCanvas.h"
39 #include "platform/image-decoders/ImageDecoder.h"
40 #include "platform/image-decoders/ImageFrame.h"
41 #include "platform/image-encoders/skia/PNGImageEncoder.h"
42 #include "third_party/skia/include/core/SkBitmapDevice.h"
43 #include "third_party/skia/include/core/SkPictureRecorder.h"
44 #include "third_party/skia/include/core/SkStream.h"
45 #include "wtf/HexNumber.h"
46 #include "wtf/text/Base64.h"
47 #include "wtf/text/TextEncoding.h"
48
49 namespace blink {
50
record(const IntSize & size,bool isCertainlyOpaque)51 GraphicsContext* GraphicsContextRecorder::record(const IntSize& size, bool isCertainlyOpaque)
52 {
53 ASSERT(!m_picture);
54 ASSERT(!m_recorder);
55 ASSERT(!m_context);
56 m_isCertainlyOpaque = isCertainlyOpaque;
57 m_recorder = adoptPtr(new SkPictureRecorder);
58 SkCanvas* canvas = m_recorder->beginRecording(size.width(), size.height(), 0, 0);
59 m_context = adoptPtr(new GraphicsContext(canvas));
60 m_context->setRegionTrackingMode(isCertainlyOpaque ? GraphicsContext::RegionTrackingOpaque : GraphicsContext::RegionTrackingDisabled);
61 m_context->setCertainlyOpaque(isCertainlyOpaque);
62 return m_context.get();
63 }
64
stop()65 PassRefPtr<GraphicsContextSnapshot> GraphicsContextRecorder::stop()
66 {
67 m_context.clear();
68 m_picture = adoptRef(m_recorder->endRecording());
69 m_recorder.clear();
70 return adoptRef(new GraphicsContextSnapshot(m_picture.release()));
71 }
72
GraphicsContextSnapshot(PassRefPtr<SkPicture> picture)73 GraphicsContextSnapshot::GraphicsContextSnapshot(PassRefPtr<SkPicture> picture)
74 : m_picture(picture)
75 {
76 }
77
decodeBitmap(const void * data,size_t length,SkBitmap * result)78 static bool decodeBitmap(const void* data, size_t length, SkBitmap* result)
79 {
80 RefPtr<SharedBuffer> buffer = SharedBuffer::create(static_cast<const char*>(data), length);
81 OwnPtr<ImageDecoder> imageDecoder = ImageDecoder::create(*buffer, ImageSource::AlphaPremultiplied, ImageSource::GammaAndColorProfileIgnored);
82 if (!imageDecoder)
83 return false;
84 imageDecoder->setData(buffer.get(), true);
85 ImageFrame* frame = imageDecoder->frameBufferAtIndex(0);
86 if (!frame)
87 return true;
88 *result = frame->getSkBitmap();
89 return true;
90 }
91
load(const char * data,size_t size)92 PassRefPtr<GraphicsContextSnapshot> GraphicsContextSnapshot::load(const char* data, size_t size)
93 {
94 SkMemoryStream stream(data, size);
95 RefPtr<SkPicture> picture = adoptRef(SkPicture::CreateFromStream(&stream, decodeBitmap));
96 if (!picture)
97 return nullptr;
98 return adoptRef(new GraphicsContextSnapshot(picture));
99 }
100
replay(unsigned fromStep,unsigned toStep,double scale) const101 PassOwnPtr<Vector<char> > GraphicsContextSnapshot::replay(unsigned fromStep, unsigned toStep, double scale) const
102 {
103 int width = ceil(scale * m_picture->width());
104 int height = ceil(scale * m_picture->height());
105 SkBitmap bitmap;
106 bitmap.allocPixels(SkImageInfo::MakeN32Premul(width, height));
107 {
108 ReplayingCanvas canvas(bitmap, fromStep, toStep);
109 canvas.scale(scale, scale);
110 canvas.resetStepCount();
111 m_picture->draw(&canvas, &canvas);
112 }
113 OwnPtr<Vector<char> > base64Data = adoptPtr(new Vector<char>());
114 Vector<char> encodedImage;
115 if (!PNGImageEncoder::encode(bitmap, reinterpret_cast<Vector<unsigned char>*>(&encodedImage)))
116 return nullptr;
117 base64Encode(encodedImage, *base64Data);
118 return base64Data.release();
119 }
120
profile(unsigned minRepeatCount,double minDuration) const121 PassOwnPtr<GraphicsContextSnapshot::Timings> GraphicsContextSnapshot::profile(unsigned minRepeatCount, double minDuration) const
122 {
123 OwnPtr<GraphicsContextSnapshot::Timings> timings = adoptPtr(new GraphicsContextSnapshot::Timings());
124 timings->reserveCapacity(minRepeatCount);
125 SkBitmap bitmap;
126 bitmap.allocPixels(SkImageInfo::MakeN32Premul(m_picture->width(), m_picture->height()));
127 OwnPtr<ProfilingCanvas> canvas = adoptPtr(new ProfilingCanvas(bitmap));
128
129 double now = WTF::monotonicallyIncreasingTime();
130 double stopTime = now + minDuration;
131 for (unsigned step = 0; step < minRepeatCount || now < stopTime; ++step) {
132 timings->append(Vector<double>());
133 Vector<double>* currentTimings = &timings->last();
134 if (timings->size() > 1)
135 currentTimings->reserveCapacity(timings->begin()->size());
136 if (step)
137 canvas = adoptPtr(new ProfilingCanvas(bitmap));
138 canvas->setTimings(currentTimings);
139 m_picture->draw(canvas.get());
140 now = WTF::monotonicallyIncreasingTime();
141 }
142 return timings.release();
143 }
144
snapshotCommandLog() const145 PassRefPtr<JSONArray> GraphicsContextSnapshot::snapshotCommandLog() const
146 {
147 LoggingCanvas canvas(m_picture->width(), m_picture->height());
148 m_picture->draw(&canvas);
149 return canvas.log();
150 }
151
152 } // namespace blink
153