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
|
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.printspooler.renderer;
import android.app.Service;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Rect;
import android.graphics.pdf.PdfRenderer;
import android.os.IBinder;
import android.os.ParcelFileDescriptor;
import android.os.RemoteException;
import android.print.PageRange;
import android.print.PrintAttributes;
import android.print.PrintAttributes.Margins;
import android.util.Log;
import android.view.View;
import libcore.io.IoUtils;
import com.android.printspooler.util.BitmapSerializeUtils;
import java.io.IOException;
/**
* Service for rendering PDF documents in an isolated process.
*/
public final class PdfRendererService extends Service {
private static final String LOG_TAG = "PdfRendererService";
private static final boolean DEBUG = false;
private static final int MILS_PER_INCH = 1000;
private static final int POINTS_IN_INCH = 72;
@Override
public IBinder onBind(Intent intent) {
return new PdfRendererImpl();
}
private final class PdfRendererImpl extends IPdfRenderer.Stub {
private final Object mLock = new Object();
private Bitmap mBitmap;
private PdfRenderer mRenderer;
@Override
public int openDocument(ParcelFileDescriptor source) throws RemoteException {
synchronized (mLock) {
throwIfOpened();
if (DEBUG) {
Log.i(LOG_TAG, "openDocument()");
}
try {
mRenderer = new PdfRenderer(source);
return mRenderer.getPageCount();
} catch (IOException ioe) {
throw new RemoteException("Cannot open file");
}
}
}
@Override
public void renderPage(int pageIndex, int bitmapWidth, int bitmapHeight,
PrintAttributes attributes, ParcelFileDescriptor destination) {
synchronized (mLock) {
try {
throwIfNotOpened();
PdfRenderer.Page page = mRenderer.openPage(pageIndex);
final int srcWidthPts = page.getWidth();
final int srcHeightPts = page.getHeight();
final int dstWidthPts = pointsFromMils(
attributes.getMediaSize().getWidthMils());
final int dstHeightPts = pointsFromMils(
attributes.getMediaSize().getHeightMils());
final boolean scaleContent = mRenderer.shouldScaleForPrinting();
final boolean contentLandscape = !attributes.getMediaSize().isPortrait();
final float displayScale;
Matrix matrix = new Matrix();
if (scaleContent) {
displayScale = Math.min((float) bitmapWidth / srcWidthPts,
(float) bitmapHeight / srcHeightPts);
} else {
if (contentLandscape) {
displayScale = (float) bitmapHeight / dstHeightPts;
} else {
displayScale = (float) bitmapWidth / dstWidthPts;
}
}
matrix.postScale(displayScale, displayScale);
Configuration configuration = PdfRendererService.this.getResources()
.getConfiguration();
if (configuration.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) {
matrix.postTranslate(bitmapWidth - srcWidthPts * displayScale, 0);
}
Margins minMargins = attributes.getMinMargins();
final int paddingLeftPts = pointsFromMils(minMargins.getLeftMils());
final int paddingTopPts = pointsFromMils(minMargins.getTopMils());
final int paddingRightPts = pointsFromMils(minMargins.getRightMils());
final int paddingBottomPts = pointsFromMils(minMargins.getBottomMils());
Rect clip = new Rect();
clip.left = (int) (paddingLeftPts * displayScale);
clip.top = (int) (paddingTopPts * displayScale);
clip.right = (int) (bitmapWidth - paddingRightPts * displayScale);
clip.bottom = (int) (bitmapHeight - paddingBottomPts * displayScale);
if (DEBUG) {
Log.i(LOG_TAG, "Rendering page:" + pageIndex);
}
Bitmap bitmap = getBitmapForSize(bitmapWidth, bitmapHeight);
page.render(bitmap, clip, matrix, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
page.close();
BitmapSerializeUtils.writeBitmapPixels(bitmap, destination);
} finally {
IoUtils.closeQuietly(destination);
}
}
}
@Override
public void closeDocument() {
synchronized (mLock) {
throwIfNotOpened();
if (DEBUG) {
Log.i(LOG_TAG, "openDocument()");
}
mRenderer.close();
mRenderer = null;
}
}
@Override
public void writePages(PageRange[] pages) {
synchronized (mLock) {
throwIfNotOpened();
if (DEBUG) {
Log.i(LOG_TAG, "writePages()");
}
// TODO: Implement dropping undesired pages.
}
}
private Bitmap getBitmapForSize(int width, int height) {
if (mBitmap != null) {
if (mBitmap.getWidth() == width && mBitmap.getHeight() == height) {
mBitmap.eraseColor(Color.WHITE);
return mBitmap;
}
mBitmap.recycle();
}
mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
mBitmap.eraseColor(Color.WHITE);
return mBitmap;
}
private void throwIfOpened() {
if (mRenderer != null) {
throw new IllegalStateException("Already opened");
}
}
private void throwIfNotOpened() {
if (mRenderer == null) {
throw new IllegalStateException("Not opened");
}
}
}
private static int pointsFromMils(int mils) {
return (int) (((float) mils / MILS_PER_INCH) * POINTS_IN_INCH);
}
}
|
