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
|
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "android_webview/native/java_browser_view_renderer_helper.h"
#include <android/bitmap.h>
#include "android_webview/public/browser/draw_sw.h"
#include "base/debug/trace_event.h"
#include "jni/JavaBrowserViewRendererHelper_jni.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/utils/SkCanvasStateUtils.h"
using base::android::JavaRef;
using base::android::ScopedJavaLocalRef;
namespace android_webview {
namespace {
// Provides software rendering functions from the Android glue layer.
// Allows preventing extra copies of data when rendering.
AwDrawSWFunctionTable* g_sw_draw_functions = NULL;
class ScopedPixelAccess {
public:
ScopedPixelAccess(JNIEnv* env, jobject java_canvas) : pixels_(NULL) {
if (g_sw_draw_functions)
pixels_ = g_sw_draw_functions->access_pixels(env, java_canvas);
}
~ScopedPixelAccess() {
if (pixels_)
g_sw_draw_functions->release_pixels(pixels_);
}
AwPixelInfo* pixels() { return pixels_; }
private:
AwPixelInfo* pixels_;
DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedPixelAccess);
};
} // namespace
// static
void JavaBrowserViewRendererHelper::SetAwDrawSWFunctionTable(
AwDrawSWFunctionTable* table) {
g_sw_draw_functions = table;
}
// static
JavaBrowserViewRendererHelper* JavaBrowserViewRendererHelper::GetInstance() {
static JavaBrowserViewRendererHelper* g_instance =
new JavaBrowserViewRendererHelper;
return g_instance;
}
// static
BrowserViewRendererJavaHelper* BrowserViewRendererJavaHelper::GetInstance() {
return JavaBrowserViewRendererHelper::GetInstance();
}
JavaBrowserViewRendererHelper::JavaBrowserViewRendererHelper() {}
JavaBrowserViewRendererHelper::~JavaBrowserViewRendererHelper() {}
bool JavaBrowserViewRendererHelper::RenderViaAuxilaryBitmapIfNeeded(
jobject java_canvas,
const gfx::Vector2d& scroll_correction,
const gfx::Rect& clip,
RenderMethod render_source) {
TRACE_EVENT0("android_webview", "RenderViaAuxilaryBitmapIfNeeded");
JNIEnv* env = base::android::AttachCurrentThread();
ScopedPixelAccess auto_release_pixels(env, java_canvas);
AwPixelInfo* pixels = auto_release_pixels.pixels();
if (pixels && pixels->state) {
skia::RefPtr<SkCanvas> canvas = skia::AdoptRef(
SkCanvasStateUtils::CreateFromCanvasState(pixels->state));
// Workarounds for http://crbug.com/271096: SW draw only supports
// translate & scale transforms, and a simple rectangular clip.
if (canvas && (!canvas->getTotalClip().isRect() ||
(canvas->getTotalMatrix().getType() &
~(SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask)))) {
canvas.clear();
}
if (canvas) {
canvas->translate(scroll_correction.x(), scroll_correction.y());
return render_source.Run(canvas.get());
}
}
return RenderViaAuxilaryBitmap(
env, java_canvas, scroll_correction, clip, render_source);
}
bool JavaBrowserViewRendererHelper::RenderViaAuxilaryBitmap(
JNIEnv* env,
jobject java_canvas,
const gfx::Vector2d& scroll_correction,
const gfx::Rect& clip,
const RenderMethod& render_source) {
// Render into an auxiliary bitmap if pixel info is not available.
ScopedJavaLocalRef<jobject> jcanvas(env, java_canvas);
TRACE_EVENT0("android_webview", "RenderToAuxBitmap");
if (clip.width() <= 0 || clip.height() <= 0)
return false;
ScopedJavaLocalRef<jobject> jbitmap(
Java_JavaBrowserViewRendererHelper_createBitmap(
env, clip.width(), clip.height(), jcanvas.obj()));
if (!jbitmap.obj())
return false;
if (!RasterizeIntoBitmap(env,
jbitmap,
clip.x() - scroll_correction.x(),
clip.y() - scroll_correction.y(),
render_source)) {
return false;
}
Java_JavaBrowserViewRendererHelper_drawBitmapIntoCanvas(
env, jbitmap.obj(), jcanvas.obj(), clip.x(), clip.y());
return true;
}
bool RegisterJavaBrowserViewRendererHelper(JNIEnv* env) {
return RegisterNativesImpl(env) >= 0;
}
bool JavaBrowserViewRendererHelper::RasterizeIntoBitmap(
JNIEnv* env,
const JavaRef<jobject>& jbitmap,
int scroll_x,
int scroll_y,
const JavaBrowserViewRendererHelper::RenderMethod& renderer) {
DCHECK(jbitmap.obj());
AndroidBitmapInfo bitmap_info;
if (AndroidBitmap_getInfo(env, jbitmap.obj(), &bitmap_info) < 0) {
LOG(ERROR) << "Error getting java bitmap info.";
return false;
}
void* pixels = NULL;
if (AndroidBitmap_lockPixels(env, jbitmap.obj(), &pixels) < 0) {
LOG(ERROR) << "Error locking java bitmap pixels.";
return false;
}
bool succeeded;
{
SkImageInfo info =
SkImageInfo::MakeN32Premul(bitmap_info.width, bitmap_info.height);
SkBitmap bitmap;
bitmap.installPixels(info, pixels, bitmap_info.stride);
SkCanvas canvas(bitmap);
canvas.translate(-scroll_x, -scroll_y);
succeeded = renderer.Run(&canvas);
}
if (AndroidBitmap_unlockPixels(env, jbitmap.obj()) < 0) {
LOG(ERROR) << "Error unlocking java bitmap pixels.";
return false;
}
return succeeded;
}
} // namespace android_webview
|
