/*
* 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();
switch (error) {
case FPDF_ERR_PASSWORD:
case FPDF_ERR_SECURITY: {
jniThrowException(env, "java/lang/SecurityException",
"cannot create document. Error:" + error);
} break;
default: {
jniThrowException(env, "java/io/IOException",
"cannot create document. Error:" + error);
} break;
}
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());
SkScalar transformValues[6];
transform->asAffine(transformValues);
matrix.Concat(transformValues[SkMatrix::kAScaleX], transformValues[SkMatrix::kASkewY],
transformValues[SkMatrix::kASkewX], transformValues[SkMatrix::kAScaleY],
transformValues[SkMatrix::kATransX], transformValues[SkMatrix::kATransY]);
}
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_BITMA
