| /* |
| * 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); |
| } |
| } |