Merge "Adding APIs to render PDF documents."

4 files changed, 295 insertions, 0 deletions

diff --git a/core/jni/Android.mk b/core/jni/Android.mk
index 726b2f7..0ad2ab2 100644
--- a/core/jni/Android.mk
+++ b/core/jni/Android.mk
@@ -5,6 +5,7 @@ LOCAL_CFLAGS += -DHAVE_CONFIG_H -DKHTML_NO_EXCEPTIONS -DGKWQ_NO_JAVA
 LOCAL_CFLAGS += -DNO_SUPPORT_JS_BINDING -DQT_NO_WHEELEVENT -DKHTML_NO_XBL
 LOCAL_CFLAGS += -U__APPLE__
 LOCAL_CFLAGS += -Wno-unused-parameter -Wno-int-to-pointer-cast
+LOCAL_CFLAGS += -Wno-non-virtual-dtor
 LOCAL_CFLAGS += -Wno-maybe-uninitialized -Wno-parentheses
 LOCAL_CPPFLAGS += -Wno-conversion-null
 
@@ -125,6 +126,7 @@ LOCAL_SRC_FILES:= \
 	android/graphics/Xfermode.cpp \
 	android/graphics/YuvToJpegEncoder.cpp \
 	android/graphics/pdf/PdfDocument.cpp \
+	android/graphics/pdf/PdfRenderer.cpp \
 	android_media_AudioRecord.cpp \
 	android_media_AudioSystem.cpp \
 	android_media_AudioTrack.cpp \
@@ -169,6 +171,9 @@ LOCAL_C_INCLUDES += \
 	$(call include-path-for, libhardware_legacy)/hardware_legacy \
 	$(TOP)/frameworks/av/include \
 	$(TOP)/system/media/camera/include \
+	external/pdfrenderer/core/include/fpdfapi \
+	external/pdfrenderer/core/include/fpdfdoc \
+	external/pdfrenderer/fpdfsdk/include \
 	external/skia/src/core \
 	external/skia/src/effects \
 	external/skia/src/images \
@@ -222,6 +227,7 @@ LOCAL_SHARED_LIBRARIES := \
 	libharfbuzz_ng \
 	libz \
 	libaudioutils \
+	libpdfrenderer \
 
 ifeq ($(USE_OPENGL_RENDERER),true)
 	LOCAL_SHARED_LIBRARIES += libhwui
diff --git a/core/jni/AndroidRuntime.cpp b/core/jni/AndroidRuntime.cpp
index f41af04..a4dc824 100644
--- a/core/jni/AndroidRuntime.cpp
+++ b/core/jni/AndroidRuntime.cpp
@@ -120,6 +120,7 @@ extern int register_android_graphics_Region(JNIEnv* env);
 extern int register_android_graphics_SurfaceTexture(JNIEnv* env);
 extern int register_android_graphics_Xfermode(JNIEnv* env);
 extern int register_android_graphics_pdf_PdfDocument(JNIEnv* env);
+extern int register_android_graphics_pdf_PdfRenderer(JNIEnv* env);
 extern int register_android_view_DisplayEventReceiver(JNIEnv* env);
 extern int register_android_view_RenderNode(JNIEnv* env);
 extern int register_android_view_RenderNodeAnimator(JNIEnv* env);
@@ -1258,6 +1259,7 @@ static const RegJNIRec gRegJNI[] = {
     REG_JNI(register_android_graphics_Xfermode),
     REG_JNI(register_android_graphics_YuvImage),
     REG_JNI(register_android_graphics_pdf_PdfDocument),
+    REG_JNI(register_android_graphics_pdf_PdfRenderer),
 
     REG_JNI(register_android_database_CursorWindow),
     REG_JNI(register_android_database_SQLiteConnection),
diff --git a/core/jni/android/graphics/Matrix.cpp b/core/jni/android/graphics/Matrix.cpp
index 23af860..cbd20e9 100644
--- a/core/jni/android/graphics/Matrix.cpp
+++ b/core/jni/android/graphics/Matrix.cpp
@@ -50,10 +50,17 @@ public:
         SkMatrix* obj = reinterpret_cast<SkMatrix*>(objHandle);
         return obj->isIdentity() ? JNI_TRUE : JNI_FALSE;
     }
+
+    static jboolean isAffine(JNIEnv* env, jobject clazz, jlong objHandle) {
+        SkMatrix* obj = reinterpret_cast<SkMatrix*>(objHandle);
+        return obj->asAffine(NULL) ? JNI_TRUE : JNI_FALSE;
+    }
+
     static jboolean rectStaysRect(JNIEnv* env, jobject clazz, jlong objHandle) {
         SkMatrix* obj = reinterpret_cast<SkMatrix*>(objHandle);
         return obj->rectStaysRect() ? JNI_TRUE : JNI_FALSE;
     }
+
     static void reset(JNIEnv* env, jobject clazz, jlong objHandle) {
         SkMatrix* obj = reinterpret_cast<SkMatrix*>(objHandle);
         obj->reset();
@@ -302,6 +309,7 @@ static JNINativeMethod methods[] = {
     {"finalizer", "(J)V", (void*) SkMatrixGlue::finalizer},
     {"native_create","(J)J", (void*) SkMatrixGlue::create},
     {"native_isIdentity","(J)Z", (void*) SkMatrixGlue::isIdentity},
+    {"native_isAffine","(J)Z", (void*) SkMatrixGlue::isAffine},
     {"native_rectStaysRect","(J)Z", (void*) SkMatrixGlue::rectStaysRect},
     {"native_reset","(J)V", (void*) SkMatrixGlue::reset},
     {"native_set","(JJ)V", (void*) SkMatrixGlue::set},
diff --git a/core/jni/android/graphics/pdf/PdfRenderer.cpp b/core/jni/android/graphics/pdf/PdfRenderer.cpp
new file mode 100644
index 0000000..15de24a
--- /dev/null
+++ b/core/jni/android/graphics/pdf/PdfRenderer.cpp
@@ -0,0 +1,279 @@
+/*
+ * 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.
+ */
+
+#include "jni.h"
+#include "JNIHelp.h"
+#include "GraphicsJNI.h"
+#include "SkBitmap.h"
+#include "SkMatrix.h"
+#include "fpdfview.h"
+#include "fsdk_rendercontext.h"
+
+#include <android_runtime/AndroidRuntime.h>
+#include <vector>
+#include <utils/Log.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+namespace android {
+
+static const int RENDER_MODE_FOR_DISPLAY = 1;
+static const int RENDER_MODE_FOR_PRINT = 2;
+
+static struct {
+    jfieldID x;
+    jfieldID y;
+} gPointClassInfo;
+
+static Mutex sLock;
+
+static int sUnmatchedInitRequestCount = 0;
+
+static void initializeLibraryIfNeeded() {
+    Mutex::Autolock _l(sLock);
+    if (sUnmatchedInitRequestCount == 0) {
+        FPDF_InitLibrary(NULL);
+    }
+    sUnmatchedInitRequestCount++;
+}
+
+static void destroyLibraryIfNeeded() {
+    Mutex::Autolock _l(sLock);
+    sUnmatchedInitRequestCount--;
+    if (sUnmatchedInitRequestCount == 0) {
+       FPDF_DestroyLibrary();
+    }
+}
+
+static int getBlock(void* param, unsigned long position, unsigned char* outBuffer,
+        unsigned long size) {
+    const int fd = reinterpret_cast<intptr_t>(param);
+    const int readCount = pread(fd, outBuffer, size, position);
+    if (readCount < 0) {
+        ALOGE("Cannot read from file descriptor. Error:%d", errno);
+        return 0;
+    }
+    return 1;
+}
+
+static jlong nativeCreate(JNIEnv* env, jclass thiz, jint fd, jlong size) {
+    initializeLibraryIfNeeded();
+
+    FPDF_FILEACCESS loader;
+    loader.m_FileLen = size;
+    loader.m_Param = reinterpret_cast<void*>(intptr_t(fd));
+    loader.m_GetBlock = &getBlock;
+
+    FPDF_DOCUMENT document = FPDF_LoadCustomDocument(&loader, NULL);
+
+    if (!document) {
+        const long error = FPDF_GetLastError();
+        jniThrowException(env, "java/io/IOException",
+                "cannot create document. Error:" + error);
+        destroyLibraryIfNeeded();
+        return -1;
+    }
+
+    return reinterpret_cast<jlong>(document);
+}
+
+static jlong nativeOpenPageAndGetSize(JNIEnv* env, jclass thiz, jlong documentPtr,
+        jint pageIndex, jobject outSize) {
+    FPDF_DOCUMENT document = reinterpret_cast<FPDF_DOCUMENT>(documentPtr);
+
+    FPDF_PAGE page = FPDF_LoadPage(document, pageIndex);
+
+    if (!page) {
+        jniThrowException(env, "java/lang/IllegalStateException",
+                "cannot load page");
+        return -1;
+    }
+
+    double width = 0;
+    double height = 0;
+
+    const int result = FPDF_GetPageSizeByIndex(document, pageIndex, &width, &height);
+
+    if (!result) {
+        jniThrowException(env, "java/lang/IllegalStateException",
+                    "cannot get page size");
+        return -1;
+    }
+
+    env->SetIntField(outSize, gPointClassInfo.x, width);
+    env->SetIntField(outSize, gPointClassInfo.y, height);
+
+    return reinterpret_cast<jlong>(page);
+}
+
+static void nativeClosePage(JNIEnv* env, jclass thiz, jlong pagePtr) {
+    FPDF_PAGE page = reinterpret_cast<FPDF_PAGE>(pagePtr);
+    FPDF_ClosePage(page);
+}
+
+static void nativeClose(JNIEnv* env, jclass thiz, jlong documentPtr) {
+    FPDF_DOCUMENT document = reinterpret_cast<FPDF_DOCUMENT>(documentPtr);
+    FPDF_CloseDocument(document);
+    destroyLibraryIfNeeded();
+}
+
+static jint nativeGetPageCount(JNIEnv* env, jclass thiz, jlong documentPtr) {
+    FPDF_DOCUMENT document = reinterpret_cast<FPDF_DOCUMENT>(documentPtr);
+    return FPDF_GetPageCount(document);
+}
+
+static jboolean nativeScaleForPrinting(JNIEnv* env, jclass thiz, jlong documentPtr) {
+    FPDF_DOCUMENT document = reinterpret_cast<FPDF_DOCUMENT>(documentPtr);
+    return FPDF_VIEWERREF_GetPrintScaling(document);
+}
+
+static void DropContext(void* data) {
+    delete (CRenderContext*) data;
+}
+
+static void renderPageBitmap(FPDF_BITMAP bitmap, FPDF_PAGE page, int destLeft, int destTop,
+        int destRight, int destBottom, SkMatrix* transform, int flags) {
+    // Note: this code ignores the currently unused RENDER_NO_NATIVETEXT,
+    // FPDF_RENDER_LIMITEDIMAGECACHE, FPDF_RENDER_FORCEHALFTONE, FPDF_GRAYSCALE,
+    // and FPDF_ANNOT flags. To add support for that refer to FPDF_RenderPage_Retail
+    // in fpdfview.cpp
+
+    CRenderContext* pContext = FX_NEW CRenderContext;
+
+    CPDF_Page* pPage = (CPDF_Page*) page;
+    pPage->SetPrivateData((void*) 1, pContext, DropContext);
+
+    CFX_FxgeDevice* fxgeDevice = FX_NEW CFX_FxgeDevice;
+    pContext->m_pDevice = fxgeDevice;
+
+    // Reverse the bytes (last argument TRUE) since the Android
+    // format is ARGB while the renderer uses BGRA internally.
+    fxgeDevice->Attach((CFX_DIBitmap*) bitmap, 0, TRUE);
+
+    CPDF_RenderOptions* renderOptions = pContext->m_pOptions;
+
+    if (!renderOptions) {
+        renderOptions = FX_NEW CPDF_RenderOptions;
+        pContext->m_pOptions = renderOptions;
+    }
+
+    if (flags & FPDF_LCD_TEXT) {
+        renderOptions->m_Flags |= RENDER_CLEARTYPE;
+    } else {
+        renderOptions->m_Flags &= ~RENDER_CLEARTYPE;
+    }
+
+    const CPDF_OCContext::UsageType usage = (flags & FPDF_PRINTING)
+            ? CPDF_OCContext::Print : CPDF_OCContext::View;
+
+    renderOptions->m_AddFlags = flags >> 8;
+    renderOptions->m_pOCContext = new CPDF_OCContext(pPage->m_pDocument, usage);
+
+    fxgeDevice->SaveState();
+
+    FX_RECT clip;
+    clip.left = destLeft;
+    clip.right = destRight;
+    clip.top = destTop;
+    clip.bottom = destBottom;
+    fxgeDevice->SetClip_Rect(&clip);
+
+    CPDF_RenderContext* pageContext = FX_NEW CPDF_RenderContext;
+    pContext->m_pContext = pageContext;
+    pageContext->Create(pPage);
+
+    CFX_AffineMatrix matrix;
+    if (!transform) {
+        pPage->GetDisplayMatrix(matrix, destLeft, destTop, destRight - destLeft,
+                destBottom - destTop, 0);
+    } else {
+        // PDF's coordinate system origin is left-bottom while
+        // in graphics it is the top-left, so remap the origin.
+        matrix.Set(1, 0, 0, -1, 0, pPage->GetPageHeight());
+        matrix.Scale(transform->getScaleX(), transform->getScaleY());
+        matrix.Rotate(transform->getSkewX(), transform->getSkewY());
+        matrix.Translate(transform->getTranslateX(), transform->getTranslateY());
+    }
+    pageContext->AppendObjectList(pPage, &matrix);
+
+    pContext->m_pRenderer = FX_NEW CPDF_ProgressiveRenderer;
+    pContext->m_pRenderer->Start(pageContext, fxgeDevice, renderOptions, NULL);
+
+    fxgeDevice->RestoreState();
+
+    pPage->RemovePrivateData((void*) 1);
+
+    delete pContext;
+}
+
+static void nativeRenderPage(JNIEnv* env, jclass thiz, jlong documentPtr, jlong pagePtr,
+        jlong bitmapPtr, jint destLeft, jint destTop, jint destRight, jint destBottom,
+        jlong matrixPtr, jint renderMode) {
+
+    FPDF_DOCUMENT document = reinterpret_cast<FPDF_DOCUMENT>(documentPtr);
+    FPDF_PAGE page = reinterpret_cast<FPDF_PAGE>(pagePtr);
+    SkBitmap* skBitmap = reinterpret_cast<SkBitmap*>(bitmapPtr);
+    SkMatrix* skMatrix = reinterpret_cast<SkMatrix*>(matrixPtr);
+
+    skBitmap->lockPixels();
+
+    const int stride = skBitmap->width() * 4;
+
+    FPDF_BITMAP bitmap = FPDFBitmap_CreateEx(skBitmap->width(), skBitmap->height(),
+            FPDFBitmap_BGRA, skBitmap->getPixels(), stride);
+
+    if (!bitmap) {
+        ALOGE("Erorr creating bitmap");
+        return;
+    }
+
+    int renderFlags = 0;
+    if (renderMode == RENDER_MODE_FOR_DISPLAY) {
+        renderFlags |= FPDF_LCD_TEXT;
+    } else if (renderMode == RENDER_MODE_FOR_PRINT) {
+        renderFlags |= FPDF_PRINTING;
+    }
+
+    renderPageBitmap(bitmap, page, destLeft, destTop, destRight,
+            destBottom, skMatrix, renderFlags);
+
+    skBitmap->unlockPixels();
+}
+
+static JNINativeMethod gPdfRenderer_Methods[] = {
+    {"nativeCreate", "(IJ)J", (void*) nativeCreate},
+    {"nativeClose", "(J)V", (void*) nativeClose},
+    {"nativeGetPageCount", "(J)I", (void*) nativeGetPageCount},
+    {"nativeScaleForPrinting", "(J)Z", (void*) nativeScaleForPrinting},
+    {"nativeRenderPage", "(JJJIIIIJI)V", (void*) nativeRenderPage},
+    {"nativeOpenPageAndGetSize", "(JILandroid/graphics/Point;)J", (void*) nativeOpenPageAndGetSize},
+    {"nativeClosePage", "(J)V", (void*) nativeClosePage}
+};
+
+int register_android_graphics_pdf_PdfRenderer(JNIEnv* env) {
+    int result = android::AndroidRuntime::registerNativeMethods(
+            env, "android/graphics/pdf/PdfRenderer", gPdfRenderer_Methods,
+            NELEM(gPdfRenderer_Methods));
+
+    jclass clazz = env->FindClass("android/graphics/Point");
+    gPointClassInfo.x = env->GetFieldID(clazz, "x", "I");
+    gPointClassInfo.y = env->GetFieldID(clazz, "y", "I");
+
+    return result;
+};
+
+};