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/*
* 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 "PdfUtils.h"
#include "jni.h"
#include <nativehelper/JNIHelp.h>
#include "GraphicsJNI.h"
#include "SkBitmap.h"
#include "SkMatrix.h"
#include "fpdfview.h"
#include "core_jni_helpers.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 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;
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 nativeRenderPage(JNIEnv* env, jclass thiz, jlong documentPtr, jlong pagePtr,
jlong bitmapPtr, jint clipLeft, jint clipTop, jint clipRight, jint clipBottom,
jlong transformPtr, jint renderMode) {
FPDF_PAGE page = reinterpret_cast<FPDF_PAGE>(pagePtr);
SkBitmap skBitmap;
bitmap::toBitmap(bitmapPtr).getSkBitmap(&skBitmap);
const int stride = skBitmap.width() * 4;
FPDF_BITMAP bitmap = FPDFBitmap_CreateEx(skBitmap.width(), skBitmap.height(),
FPDFBitmap_BGRA, skBitmap.getPixels(), stride);
int renderFlags = FPDF_REVERSE_BYTE_ORDER;
if (renderMode == RENDER_MODE_FOR_DISPLAY) {
renderFlags |= FPDF_LCD_TEXT;
} else if (renderMode == RENDER_MODE_FOR_PRINT) {
renderFlags |= FPDF_PRINTING;
}
SkMatrix matrix = *reinterpret_cast<SkMatrix*>(transformPtr);
SkScalar transformValues[6];
if (!matrix.asAffine(transformValues)) {
jniThrowException(env, "java/lang/IllegalArgumentException",
"transform matrix has perspective. Only affine matrices are allowed.");
return;
}
FS_MATRIX transform = {transformValues[SkMatrix::kAScaleX], transformValues[SkMatrix::kASkewY],
transformValues[SkMatrix::kASkewX], transformValues[SkMatrix::kAScaleY],
transformValues[SkMatrix::kATransX],
transformValues[SkMatrix::kATransY]};
FS_RECTF clip = {(float) clipLeft, (float) clipTop, (float) clipRight, (float) clipBottom};
FPDF_RenderPageBitmapWithMatrix(bitmap, page, &transform, &clip, renderFlags);
skBitmap.notifyPixelsChanged();
}
static const JNINativeMethod gPdfRenderer_Methods[] = {
{"nativeCreate", "(IJ)J", (void*) nativeOpen},
{"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 = RegisterMethodsOrDie(
env, "android/graphics/pdf/PdfRenderer", gPdfRenderer_Methods,
NELEM(gPdfRenderer_Methods));
jclass clazz = FindClassOrDie(env, "android/graphics/Point");
gPointClassInfo.x = GetFieldIDOrDie(env, clazz, "x", "I");
gPointClassInfo.y = GetFieldIDOrDie(env, clazz, "y", "I");
return result;
};
};
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