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 package com.android.printspooler.renderer; 18 19 import android.app.Service; 20 import android.content.Intent; 21 import android.content.res.Configuration; 22 import android.graphics.Bitmap; 23 import android.graphics.Color; 24 import android.graphics.Matrix; 25 import android.graphics.Rect; 26 import android.graphics.pdf.PdfEditor; 27 import android.graphics.pdf.PdfRenderer; 28 import android.os.IBinder; 29 import android.os.ParcelFileDescriptor; 30 import android.os.RemoteException; 31 import android.print.PageRange; 32 import android.print.PrintAttributes; 33 import android.print.PrintAttributes.Margins; 34 import android.util.Log; 35 import android.view.View; 36 import com.android.printspooler.util.PageRangeUtils; 37 import libcore.io.IoUtils; 38 import com.android.printspooler.util.BitmapSerializeUtils; 39 import java.io.IOException; 40 41 /** 42 * Service for manipulation of PDF documents in an isolated process. 43 */ 44 public final class PdfManipulationService extends Service { 45 public static final String ACTION_GET_RENDERER = 46 "com.android.printspooler.renderer.ACTION_GET_RENDERER"; 47 public static final String ACTION_GET_EDITOR = 48 "com.android.printspooler.renderer.ACTION_GET_EDITOR"; 49 50 public static final int ERROR_MALFORMED_PDF_FILE = -2; 51 52 public static final int ERROR_SECURE_PDF_FILE = -3; 53 54 private static final String LOG_TAG = "PdfManipulationService"; 55 private static final boolean DEBUG = false; 56 57 private static final int MILS_PER_INCH = 1000; 58 private static final int POINTS_IN_INCH = 72; 59 60 @Override 61 public IBinder onBind(Intent intent) { 62 String action = intent.getAction(); 63 switch (action) { 64 case ACTION_GET_RENDERER: { 65 return new PdfRendererImpl(); 66 } 67 case ACTION_GET_EDITOR: { 68 return new PdfEditorImpl(); 69 } 70 default: { 71 throw new IllegalArgumentException("Invalid intent action:" + action); 72 } 73 } 74 } 75 76 private final class PdfRendererImpl extends IPdfRenderer.Stub { 77 private final Object mLock = new Object(); 78 79 private Bitmap mBitmap; 80 private PdfRenderer mRenderer; 81 82 @Override 83 public int openDocument(ParcelFileDescriptor source) throws RemoteException { 84 synchronized (mLock) { 85 try { 86 throwIfOpened(); 87 if (DEBUG) { 88 Log.i(LOG_TAG, "openDocument()"); 89 } 90 mRenderer = new PdfRenderer(source); 91 return mRenderer.getPageCount(); 92 } catch (IOException | IllegalStateException e) { 93 IoUtils.closeQuietly(source); 94 Log.e(LOG_TAG, "Cannot open file", e); 95 return ERROR_MALFORMED_PDF_FILE; 96 } catch (SecurityException e) { 97 IoUtils.closeQuietly(source); 98 Log.e(LOG_TAG, "Cannot open file", e); 99 return ERROR_SECURE_PDF_FILE; 100 } 101 } 102 } 103 104 @Override 105 public void renderPage(int pageIndex, int bitmapWidth, int bitmapHeight, 106 PrintAttributes attributes, ParcelFileDescriptor destination) { 107 synchronized (mLock) { 108 try { 109 throwIfNotOpened(); 110 111 PdfRenderer.Page page = mRenderer.openPage(pageIndex); 112 113 final int srcWidthPts = page.getWidth(); 114 final int srcHeightPts = page.getHeight(); 115 116 final int dstWidthPts = pointsFromMils( 117 attributes.getMediaSize().getWidthMils()); 118 final int dstHeightPts = pointsFromMils( 119 attributes.getMediaSize().getHeightMils()); 120 121 final boolean scaleContent = mRenderer.shouldScaleForPrinting(); 122 final boolean contentLandscape = !attributes.getMediaSize().isPortrait(); 123 124 final float displayScale; 125 Matrix matrix = new Matrix(); 126 127 if (scaleContent) { 128 displayScale = Math.min((float) bitmapWidth / srcWidthPts, 129 (float) bitmapHeight / srcHeightPts); 130 } else { 131 if (contentLandscape) { 132 displayScale = (float) bitmapHeight / dstHeightPts; 133 } else { 134 displayScale = (float) bitmapWidth / dstWidthPts; 135 } 136 } 137 matrix.postScale(displayScale, displayScale); 138 139 Configuration configuration = PdfManipulationService.this.getResources() 140 .getConfiguration(); 141 if (configuration.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) { 142 matrix.postTranslate(bitmapWidth - srcWidthPts * displayScale, 0); 143 } 144 145 Margins minMargins = attributes.getMinMargins(); 146 final int paddingLeftPts = pointsFromMils(minMargins.getLeftMils()); 147 final int paddingTopPts = pointsFromMils(minMargins.getTopMils()); 148 final int paddingRightPts = pointsFromMils(minMargins.getRightMils()); 149 final int paddingBottomPts = pointsFromMils(minMargins.getBottomMils()); 150 151 Rect clip = new Rect(); 152 clip.left = (int) (paddingLeftPts * displayScale); 153 clip.top = (int) (paddingTopPts * displayScale); 154 clip.right = (int) (bitmapWidth - paddingRightPts * displayScale); 155 clip.bottom = (int) (bitmapHeight - paddingBottomPts * displayScale); 156 157 if (DEBUG) { 158 Log.i(LOG_TAG, "Rendering page:" + pageIndex); 159 } 160 161 Bitmap bitmap = getBitmapForSize(bitmapWidth, bitmapHeight); 162 page.render(bitmap, clip, matrix, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY); 163 164 page.close(); 165 166 BitmapSerializeUtils.writeBitmapPixels(bitmap, destination); 167 } finally { 168 IoUtils.closeQuietly(destination); 169 } 170 } 171 } 172 173 @Override 174 public void closeDocument() { 175 synchronized (mLock) { 176 throwIfNotOpened(); 177 if (DEBUG) { 178 Log.i(LOG_TAG, "closeDocument()"); 179 } 180 mRenderer.close(); 181 mRenderer = null; 182 } 183 } 184 185 private Bitmap getBitmapForSize(int width, int height) { 186 if (mBitmap != null) { 187 if (mBitmap.getWidth() == width && mBitmap.getHeight() == height) { 188 mBitmap.eraseColor(Color.WHITE); 189 return mBitmap; 190 } 191 mBitmap.recycle(); 192 } 193 mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); 194 mBitmap.eraseColor(Color.WHITE); 195 return mBitmap; 196 } 197 198 private void throwIfOpened() { 199 if (mRenderer != null) { 200 throw new IllegalStateException("Already opened"); 201 } 202 } 203 204 private void throwIfNotOpened() { 205 if (mRenderer == null) { 206 throw new IllegalStateException("Not opened"); 207 } 208 } 209 } 210 211 private final class PdfEditorImpl extends IPdfEditor.Stub { 212 private final Object mLock = new Object(); 213 214 private PdfEditor mEditor; 215 216 @Override 217 public int openDocument(ParcelFileDescriptor source) throws RemoteException { 218 synchronized (mLock) { 219 try { 220 throwIfOpened(); 221 if (DEBUG) { 222 Log.i(LOG_TAG, "openDocument()"); 223 } 224 mEditor = new PdfEditor(source); 225 return mEditor.getPageCount(); 226 } catch (IOException | IllegalStateException e) { 227 IoUtils.closeQuietly(source); 228 Log.e(LOG_TAG, "Cannot open file", e); 229 throw new RemoteException(e.toString()); 230 } 231 } 232 } 233 234 @Override 235 public void removePages(PageRange[] ranges) { 236 synchronized (mLock) { 237 throwIfNotOpened(); 238 if (DEBUG) { 239 Log.i(LOG_TAG, "removePages()"); 240 } 241 242 ranges = PageRangeUtils.normalize(ranges); 243 244 final int rangeCount = ranges.length; 245 for (int i = rangeCount - 1; i >= 0; i--) { 246 PageRange range = ranges[i]; 247 for (int j = range.getEnd(); j >= range.getStart(); j--) { 248 mEditor.removePage(j); 249 } 250 } 251 } 252 } 253 254 @Override 255 public void applyPrintAttributes(PrintAttributes attributes) { 256 synchronized (mLock) { 257 throwIfNotOpened(); 258 if (DEBUG) { 259 Log.i(LOG_TAG, "applyPrintAttributes()"); 260 } 261 262 Rect mediaBox = new Rect(); 263 Rect cropBox = new Rect(); 264 Matrix transform = new Matrix(); 265 266 final boolean contentPortrait = attributes.getMediaSize().isPortrait(); 267 268 final boolean layoutDirectionRtl = getResources().getConfiguration() 269 .getLayoutDirection() == View.LAYOUT_DIRECTION_RTL; 270 271 // We do not want to rotate the media box, so take into account orientation. 272 final int dstWidthPts = contentPortrait 273 ? pointsFromMils(attributes.getMediaSize().getWidthMils()) 274 : pointsFromMils(attributes.getMediaSize().getHeightMils()); 275 final int dstHeightPts = contentPortrait 276 ? pointsFromMils(attributes.getMediaSize().getHeightMils()) 277 : pointsFromMils(attributes.getMediaSize().getWidthMils()); 278 279 final boolean scaleForPrinting = mEditor.shouldScaleForPrinting(); 280 281 final int pageCount = mEditor.getPageCount(); 282 for (int i = 0; i < pageCount; i++) { 283 if (!mEditor.getPageMediaBox(i, mediaBox)) { 284 Log.e(LOG_TAG, "Malformed PDF file"); 285 return; 286 } 287 288 final int srcWidthPts = mediaBox.width(); 289 final int srcHeightPts = mediaBox.height(); 290 291 // Update the media box with the desired size. 292 mediaBox.right = dstWidthPts; 293 mediaBox.bottom = dstHeightPts; 294 mEditor.setPageMediaBox(i, mediaBox); 295 296 // Make sure content is top-left after media box resize. 297 transform.setTranslate(0, srcHeightPts - dstHeightPts); 298 299 // Rotate the content if in landscape. 300 if (!contentPortrait) { 301 transform.postRotate(270); 302 transform.postTranslate(0, dstHeightPts); 303 } 304 305 // Scale the content if document allows it. 306 final float scale; 307 if (scaleForPrinting) { 308 if (contentPortrait) { 309 scale = Math.min((float) dstWidthPts / srcWidthPts, 310 (float) dstHeightPts / srcHeightPts); 311 transform.postScale(scale, scale); 312 } else { 313 scale = Math.min((float) dstWidthPts / srcHeightPts, 314 (float) dstHeightPts / srcWidthPts); 315 transform.postScale(scale, scale, mediaBox.left, mediaBox.bottom); 316 } 317 } else { 318 scale = 1.0f; 319 } 320 321 // Update the crop box relatively to the media box change, if needed. 322 if (mEditor.getPageCropBox(i, cropBox)) { 323 cropBox.left = (int) (cropBox.left * scale + 0.5f); 324 cropBox.top = (int) (cropBox.top * scale + 0.5f); 325 cropBox.right = (int) (cropBox.right * scale + 0.5f); 326 cropBox.bottom = (int) (cropBox.bottom * scale + 0.5f); 327 cropBox.intersect(mediaBox); 328 mEditor.setPageCropBox(i, cropBox); 329 } 330 331 // If in RTL mode put the content in the logical top-right corner. 332 if (layoutDirectionRtl) { 333 final float dx = contentPortrait 334 ? dstWidthPts - (int) (srcWidthPts * scale + 0.5f) : 0; 335 final float dy = contentPortrait 336 ? 0 : - (dstHeightPts - (int) (srcWidthPts * scale + 0.5f)); 337 transform.postTranslate(dx, dy); 338 } 339 340 // Adjust the physical margins if needed. 341 Margins minMargins = attributes.getMinMargins(); 342 final int paddingLeftPts = pointsFromMils(minMargins.getLeftMils()); 343 final int paddingTopPts = pointsFromMils(minMargins.getTopMils()); 344 final int paddingRightPts = pointsFromMils(minMargins.getRightMils()); 345 final int paddingBottomPts = pointsFromMils(minMargins.getBottomMils()); 346 347 Rect clip = new Rect(mediaBox); 348 clip.left += paddingLeftPts; 349 clip.top += paddingTopPts; 350 clip.right -= paddingRightPts; 351 clip.bottom -= paddingBottomPts; 352 353 // Apply the accumulated transforms. 354 mEditor.setTransformAndClip(i, transform, clip); 355 } 356 } 357 } 358 359 @Override 360 public void write(ParcelFileDescriptor destination) throws RemoteException { 361 synchronized (mLock) { 362 try { 363 throwIfNotOpened(); 364 if (DEBUG) { 365 Log.i(LOG_TAG, "write()"); 366 } 367 mEditor.write(destination); 368 } catch (IOException | IllegalStateException e) { 369 IoUtils.closeQuietly(destination); 370 Log.e(LOG_TAG, "Error writing PDF to file.", e); 371 throw new RemoteException(e.toString()); 372 } 373 } 374 } 375 376 @Override 377 public void closeDocument() { 378 synchronized (mLock) { 379 throwIfNotOpened(); 380 if (DEBUG) { 381 Log.i(LOG_TAG, "closeDocument()"); 382 } 383 mEditor.close(); 384 mEditor = null; 385 } 386 } 387 388 private void throwIfOpened() { 389 if (mEditor != null) { 390 throw new IllegalStateException("Already opened"); 391 } 392 } 393 394 private void throwIfNotOpened() { 395 if (mEditor == null) { 396 throw new IllegalStateException("Not opened"); 397 } 398 } 399 } 400 401 private static int pointsFromMils(int mils) { 402 return (int) (((float) mils / MILS_PER_INCH) * POINTS_IN_INCH); 403 } 404 } 405