am 90242fe5: Merge "Switch to the new Skia PDF generation APIs." into klp-dev (134631b9) · Commits · e / os / android_frameworks_base

core/jni/android/graphics/pdf/PdfDocument.cpp

+110 −34

Original line number	Diff line number	Diff line
		@@ -17,62 +17,138 @@
		#include "jni.h"
		#include "GraphicsJNI.h"
		#include <android_runtime/AndroidRuntime.h>
		#include <vector>

		#include "CreateJavaOutputStreamAdaptor.h"

		#include "SkCanvas.h"
		#include "SkPDFDevice.h"
		#include "SkPDFDocument.h"
		#include "SkDocument.h"
		#include "SkPicture.h"
		#include "SkStream.h"
		#include "SkRect.h"
		#include "SkSize.h"
		#include "CreateJavaOutputStreamAdaptor.h"
		#include "JNIHelp.h"

		namespace android {

		#define LOGD(x...) do { Log::Instance()->printf(Log::ELogD, x); } while(0)
		struct PageRecord {

		static jint nativeCreateDocument(JNIEnv* env, jobject clazz) {
		return reinterpret_cast<jint>(new SkPDFDocument());
		PageRecord(int width, int height, const SkRect& contentRect)
		: mPicture(new SkPicture()), mWidth(width), mHeight(height) {
		mContentRect = contentRect;
		}

		static void nativeFinalize(JNIEnv* env, jobject thiz, jint documentPtr) {
		delete reinterpret_cast<SkPDFDocument*>(documentPtr);
		~PageRecord() {
		mPicture->unref();
		}

		static jint nativeCreatePage(JNIEnv* env, jobject thiz, jint pageWidth, jint pageHeight,
		jint contentLeft, jint contentTop, jint contentRight, jint contentBottom) {
		SkPicture* const mPicture;
		const int mWidth;
		const int mHeight;
		SkRect mContentRect;
		};

		class PdfDocument {
		public:
		PdfDocument() {
		mCurrentPage = NULL;
		}

		SkCanvas* startPage(int width, int height,
		int contentLeft, int contentTop, int contentRight, int contentBottom) {
		assert(mCurrentPage == NULL);

		SkMatrix transformation;
		transformation.setTranslate(contentLeft, contentTop);
		SkRect contentRect = SkRect::MakeLTRB(
		contentLeft, contentTop, contentRight, contentBottom);
		PageRecord* page = new PageRecord(width, height, contentRect);
		mPages.push_back(page);
		mCurrentPage = page;

		SkISize skPageSize = SkISize::Make(pageWidth, pageHeight);
		SkISize skContentSize = SkISize::Make(contentRight - contentLeft, contentBottom - contentTop);
		SkCanvas* canvas = page->mPicture->beginRecording(
		contentRect.width(), contentRect.height(), 0);

		SkPDFDevice* skPdfDevice = new SkPDFDevice(skPageSize, skContentSize, transformation);
		return reinterpret_cast<jint>(new SkCanvas(skPdfDevice));
		// We pass this canvas to Java where it is used to construct
		// a Java Canvas object which dereferences the pointer when it
		// is destroyed, so we have to bump up the reference count.
		canvas->ref();

		return canvas;
		}

		void finishPage() {
		assert(mCurrentPage != NULL);
		mCurrentPage->mPicture->endRecording();
		mCurrentPage = NULL;
		}

		static void nativeAppendPage(JNIEnv* env, jobject thiz, jint documentPtr, jint pagePtr) {
		SkCanvas* page = reinterpret_cast<SkCanvas*>(pagePtr);
		SkPDFDocument* document = reinterpret_cast<SkPDFDocument*>(documentPtr);
		SkPDFDevice* device = static_cast<SkPDFDevice*>(page->getDevice());
		document->appendPage(device);
		void write(SkWStream* stream) {
		SkDocument* document = SkDocument::CreatePDF(stream);
		for (unsigned i = 0; i < mPages.size(); i++) {
		PageRecord* page = mPages[i];

		SkCanvas* canvas = document->beginPage(page->mWidth, page->mHeight,
		&(page->mContentRect));

		canvas->clipRect(page->mContentRect);
		canvas->translate(page->mContentRect.left(), page->mContentRect.top());
		canvas->drawPicture(*page->mPicture);

		document->endPage();
		}
		document->close();
		}

		static void nativeWriteTo(JNIEnv* env, jobject clazz, jint documentPtr,
		jobject out, jbyteArray chunk) {
		void close() {
		for (unsigned i = 0; i < mPages.size(); i++) {
		delete mPages[i];
		}
		delete mCurrentPage;
		mCurrentPage = NULL;
		}

		private:
		~PdfDocument() {
		close();
		}

		std::vector<PageRecord*> mPages;
		PageRecord* mCurrentPage;
		};

		static jint nativeCreateDocument(JNIEnv* env, jobject thiz) {
		return reinterpret_cast<jint>(new PdfDocument());
		}

		static jint nativeStartPage(JNIEnv* env, jobject thiz, jint documentPtr,
		jint pageWidth, jint pageHeight,
		jint contentLeft, jint contentTop, jint contentRight, jint contentBottom) {
		PdfDocument* document = reinterpret_cast<PdfDocument*>(documentPtr);
		return reinterpret_cast<jint>(document->startPage(pageWidth, pageHeight,
		contentLeft, contentTop, contentRight, contentBottom));
		}

		static void nativeFinishPage(JNIEnv* env, jobject thiz, jint documentPtr) {
		PdfDocument* document = reinterpret_cast<PdfDocument*>(documentPtr);
		document->finishPage();
		}

		static void nativeWriteTo(JNIEnv* env, jobject thiz, jint documentPtr, jobject out,
		jbyteArray chunk) {
		PdfDocument* document = reinterpret_cast<PdfDocument*>(documentPtr);
		SkWStream* skWStream = CreateJavaOutputStreamAdaptor(env, out, chunk);
		SkPDFDocument* document = reinterpret_cast<SkPDFDocument*>(documentPtr);
		document->emitPDF(skWStream);
		document->write(skWStream);
		delete skWStream;
		}

		static void nativeClose(JNIEnv* env, jobject thiz, jint documentPtr) {
		PdfDocument* document = reinterpret_cast<PdfDocument*>(documentPtr);
		document->close();
		}

		static JNINativeMethod gPdfDocument_Methods[] = {
		{"nativeCreateDocument", "()I", (void*) nativeCreateDocument},
		{"nativeFinalize", "(I)V", (void*) nativeFinalize},
		{"nativeCreatePage", "(IIIIII)I",
		(void*) nativeCreatePage},
		{"nativeAppendPage", "(II)V", (void*) nativeAppendPage},
		{"nativeWriteTo", "(ILjava/io/OutputStream;[B)V", (void*) nativeWriteTo}
		{"nativeStartPage", "(IIIIIII)I", (void*) nativeStartPage},
		{"nativeFinishPage", "(I)V", (void*) nativeFinishPage},
		{"nativeWriteTo", "(ILjava/io/OutputStream;[B)V", (void*) nativeWriteTo},
		{"nativeClose", "(I)V", (void*) nativeClose}
		};

		int register_android_graphics_pdf_PdfDocument(JNIEnv* env) {

graphics/java/android/graphics/pdf/PdfDocument.java

+27 −20

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@ package android.graphics.pdf;

		import android.graphics.Bitmap;
		import android.graphics.Canvas;
		import android.graphics.Paint;
		import android.graphics.Rect;

		import dalvik.system.CloseGuard;
		@@ -69,6 +70,12 @@ import java.util.List;
		*/
		public class PdfDocument {

		// TODO: We need a constructor that will take an OutputStream to
		// support online data serialization as opposed to the current
		// on demand one. The current approach is fine until Skia starts
		// to support online PDF generation at which point we need to
		// handle this.

		private final byte[] mChunk = new byte[4096];

		private final CloseGuard mCloseGuard = CloseGuard.get();
		@@ -111,7 +118,7 @@ public class PdfDocument {
		if (pageInfo == null) {
		throw new IllegalArgumentException("page cannot be null");
		}
		Canvas canvas = new PdfCanvas(nativeCreatePage(pageInfo.mPageWidth,
		Canvas canvas = new PdfCanvas(nativeStartPage(mNativeDocument, pageInfo.mPageWidth,
		pageInfo.mPageHeight, pageInfo.mContentRect.left, pageInfo.mContentRect.top,
		pageInfo.mContentRect.right, pageInfo.mContentRect.bottom));
		mCurrentPage = new Page(canvas, pageInfo);
		@@ -142,7 +149,7 @@ public class PdfDocument {
		}
		mPages.add(page.getInfo());
		mCurrentPage = null;
		nativeAppendPage(mNativeDocument, page.mCanvas.mNativeCanvas);
		nativeFinishPage(mNativeDocument);
		page.finish();
		}

		@@ -204,7 +211,7 @@ public class PdfDocument {

		private void dispose() {
		if (mNativeDocument != 0) {
		nativeFinalize(mNativeDocument);
		nativeClose(mNativeDocument);
		mCloseGuard.close();
		mNativeDocument = 0;
		}
		@@ -230,14 +237,14 @@ public class PdfDocument {

		private native int nativeCreateDocument();

		private native void nativeFinalize(int document);
		private native void nativeClose(int document);

		private native void nativeAppendPage(int document, int page);
		private native void nativeFinishPage(int document);

		private native void nativeWriteTo(int document, OutputStream out, byte[] chunk);

		private static native int nativeCreatePage(int pageWidth, int pageHeight, int contentLeft,
		int contentTop, int contentRight, int contentBottom);
		private static native int nativeStartPage(int documentPtr, int pageWidth, int pageHeight,
		int contentLeft, int contentTop, int contentRight, int contentBottom);

		private final class PdfCanvas extends Canvas {

		@@ -392,28 +399,28 @@ public class PdfDocument {
		* Gets the {@link Canvas} of the page.
		*
		* <p>
		* <strong>Note: </strong> There are some draw operations that are
		* not yet supported by the canvas returned by this method. More
		* specifically:
		* <strong>Note: </strong> There are some draw operations that are not yet
		* supported by the canvas returned by this method. More specifically:
		* <ul>
		* <li>{@link Canvas#clipPath(android.graphics.Path)
		* Canvas.clipPath(android.graphics.Path)}</li>
		* <li>All flavors of {@link Canvas#drawText(String, float, float,
		* android.graphics.Paint) Canvas.drawText(String, float, float,
		* android.graphics.Paint)}</li>
		* <li>All flavors of {@link Canvas#drawPosText(String, float[],
		* android.graphics.Paint) Canvas.drawPosText(String, float[],
		* android.graphics.Paint)}</li>
		* <li>Inverse path clipping performed via {@link Canvas#clipPath(android.graphics.Path,
		* android.graphics.Region.Op) Canvas.clipPath(android.graphics.Path,
		* android.graphics.Region.Op)} for {@link
		* android.graphics.Region.Op#REVERSE_DIFFERENCE
		* Region.Op#REVERSE_DIFFERENCE} operations.</li>
		* <li>{@link Canvas#drawVertices(android.graphics.Canvas.VertexMode, int,
		* float[], int, float[], int, int[], int, short[], int, int,
		* android.graphics.Paint) Canvas.drawVertices(
		* android.graphics.Canvas.VertexMode, int, float[], int, float[],
		* int, int[], int, short[], int, int, android.graphics.Paint)}</li>
		* <li>{@link android.graphics.PorterDuff.Mode#SRC_ATOP PorterDuff.Mode SRC},
		* <li>Color filters set via {@link Paint#setColorFilter(
		* android.graphics.ColorFilter)}</li>
		* <li>Mask filters set via {@link Paint#setMaskFilter(
		* android.graphics.MaskFilter)}</li>
		* <li>Some XFER modes such as
		* {@link android.graphics.PorterDuff.Mode#SRC_ATOP PorterDuff.Mode SRC},
		* {@link android.graphics.PorterDuff.Mode#DST_ATOP PorterDuff.DST_ATOP},
		* {@link android.graphics.PorterDuff.Mode#XOR PorterDuff.XOR},
		* {@link android.graphics.PorterDuff.Mode#ADD PorterDuff.ADD}</li>
		* <li>Perspective transforms</li>
		* </ul>
		*
		* @return The canvas if the page is not finished, null otherwise.