1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/cpp/graphics_2d.h"
#include "ppapi/cpp/image_data.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/point.h"
#include "ppapi/cpp/rect.h"
#include "ppapi/cpp/var.h"
#include "SkBase64.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkColor.h"
#include "SkDebugger.h"
#include "SkGraphics.h"
#include "SkStream.h"
#include "SkString.h"
class SkiaInstance;
// Used by SkDebugf
SkiaInstance* gPluginInstance;
void FlushCallback(void* data, int32_t result);
// Skia's subclass of pp::Instance, our interface with the browser.
class SkiaInstance : public pp::Instance {
public:
explicit SkiaInstance(PP_Instance instance)
: pp::Instance(instance)
, fCanvas(NULL)
, fPicture(NULL)
, fFlushLoopRunning(false)
, fFlushPending(false)
{
gPluginInstance = this;
SkGraphics::Init();
}
virtual ~SkiaInstance() {
SkGraphics::Term();
gPluginInstance = NULL;
}
virtual void HandleMessage(const pp::Var& var_message) {
// Receive a message from javascript.
if (var_message.is_string()) {
SkString msg(var_message.AsString().c_str());
if (msg.startsWith("init")) {
} else if (msg.startsWith("LoadSKP")) {
size_t startIndex = strlen("LoadSKP");
size_t dataSize = msg.size()/sizeof(char) - startIndex;
SkBase64 decodedData;
decodedData.decode(msg.c_str() + startIndex, dataSize);
size_t decodedSize = 3 * (dataSize / 4);
SkDebugf("Got size: %d\n", decodedSize);
if (!decodedData.getData()) {
SkDebugf("Failed to decode SKP\n");
return;
}
SkMemoryStream pictureStream(decodedData.getData(), decodedSize);
fPicture = new SkPicture(&pictureStream);
if (fPicture->width() == 0 || fPicture->height() == 0) {
SkDebugf("Failed to create SKP.\n");
return;
}
fDebugger.loadPicture(fPicture);
// Set up the command list.
SkTArray<SkString>* commands = fDebugger.getDrawCommandsAsStrings();
PostMessage("ClearCommands");
for (int i = 0; i < commands->count(); ++i) {
SkString addCommand("AddCommand:");
addCommand.append((*commands)[i]);
PostMessage(addCommand.c_str());
}
PostMessage("UpdateCommands");
// Set the overview text.
SkString overviewText;
fDebugger.getOverviewText(NULL, 0.0, &overviewText, 1);
overviewText.prepend("SetOverview:");
PostMessage(overviewText.c_str());
// Draw the SKP.
if (!fFlushLoopRunning) {
Paint();
}
} else if (msg.startsWith("CommandSelected:")) {
size_t startIndex = strlen("CommandSelected:");
int index = atoi(msg.c_str() + startIndex);
fDebugger.setIndex(index);
if (!fFlushLoopRunning) {
Paint();
}
} else if (msg.startsWith("Rewind")) {
fCanvas->clear(SK_ColorWHITE);
fDebugger.setIndex(0);
if (!fFlushLoopRunning) {
Paint();
}
} else if (msg.startsWith("StepBack")) {
fCanvas->clear(SK_ColorWHITE);
int currentIndex = fDebugger.index();
if (currentIndex > 1) {
fDebugger.setIndex(currentIndex - 1);
if (!fFlushLoopRunning) {
Paint();
}
}
} else if (msg.startsWith("Pause")) {
// TODO(borenet)
} else if (msg.startsWith("StepForward")) {
int currentIndex = fDebugger.index();
if (currentIndex < fDebugger.getSize() -1) {
fDebugger.setIndex(currentIndex + 1);
if (!fFlushLoopRunning) {
Paint();
}
}
} else if (msg.startsWith("Play")) {
fDebugger.setIndex(fDebugger.getSize() - 1);
if (!fFlushLoopRunning) {
Paint();
}
}
}
}
void Paint() {
if (!fImage.is_null()) {
fDebugger.draw(fCanvas);
fDeviceContext.PaintImageData(fImage, pp::Point(0, 0));
if (!fFlushPending) {
fFlushPending = true;
fDeviceContext.Flush(pp::CompletionCallback(&FlushCallback, this));
} else {
SkDebugf("A flush is pending... Skipping flush.\n");
}
} else {
SkDebugf("No pixels to write to!\n");
}
}
virtual void DidChangeView(const pp::Rect& position, const pp::Rect& clip) {
if (position.size().width() == fWidth &&
position.size().height() == fHeight) {
return; // We don't care about the position, only the size.
}
fWidth = position.size().width();
fHeight = position.size().height();
fDeviceContext = pp::Graphics2D(this, pp::Size(fWidth, fHeight), false);
if (!BindGraphics(fDeviceContext)) {
SkDebugf("Couldn't bind the device context\n");
return;
}
fImage = pp::ImageData(this,
PP_IMAGEDATAFORMAT_BGRA_PREMUL,
pp::Size(fWidth, fHeight), false);
fBitmap.setConfig(SkBitmap::kARGB_8888_Config, fWidth, fHeight);
fBitmap.setPixels(fImage.data());
if (fCanvas) {
delete fCanvas;
}
fCanvas = new SkCanvas(fBitmap);
fCanvas->clear(SK_ColorWHITE);
if (!fFlushLoopRunning) {
Paint();
}
}
void OnFlush() {
fFlushLoopRunning = true;
fFlushPending = false;
Paint();
}
private:
pp::Graphics2D fDeviceContext;
pp::ImageData fImage;
int fWidth;
int fHeight;
SkBitmap fBitmap;
SkCanvas* fCanvas;
SkDebugger fDebugger;
SkPicture* fPicture;
bool fFlushLoopRunning;
bool fFlushPending;
};
void FlushCallback(void* data, int32_t result) {
static_cast<SkiaInstance*>(data)->OnFlush();
}
class SkiaModule : public pp::Module {
public:
SkiaModule() : pp::Module() {}
virtual ~SkiaModule() {}
virtual pp::Instance* CreateInstance(PP_Instance instance) {
return new SkiaInstance(instance);
}
};
namespace pp {
Module* CreateModule() {
return new SkiaModule();
}
} // namespace pp
|
