jboolean Java_com_googlecode_tesseract_android_PageIterator_nativeNext(JNIEnv *env, jclass clazz,
jint nativePageIterator, jint level) {
PageIterator *pageIterator = (PageIterator *) nativePageIterator;
PageIteratorLevel enumLevel = (PageIteratorLevel) level;
return pageIterator->Next(enumLevel) ? JNI_TRUE : JNI_FALSE;
}
/**
* Returns the bounding rectangle of the current object at the given level in
* the coordinates of the working image that is pix_binary().
* See comment on coordinate system above.
* Returns false if there is no such object at the current position.
*/
bool PageIterator::BoundingBoxInternal(PageIteratorLevel level,
int* left, int* top,
int* right, int* bottom) const {
if (Empty(level))
return false;
TBOX box;
PARA *para = NULL;
switch (level) {
case RIL_BLOCK:
box = it_->block()->block->bounding_box();
break;
case RIL_PARA:
para = it_->row()->row->para();
// explicit fall-through.
case RIL_TEXTLINE:
box = it_->row()->row->bounding_box();
break;
case RIL_WORD:
box = it_->word()->word->bounding_box();
break;
case RIL_SYMBOL:
if (cblob_it_ == NULL)
box = it_->word()->box_word->BlobBox(blob_index_);
else
box = cblob_it_->data()->bounding_box();
}
if (level == RIL_PARA) {
PageIterator other = *this;
other.Begin();
do {
if (other.it_->block() &&
other.it_->block()->block == it_->block()->block &&
other.it_->row() && other.it_->row()->row &&
other.it_->row()->row->para() == para) {
box = box.bounding_union(other.it_->row()->row->bounding_box());
}
} while (other.Next(RIL_TEXTLINE));
}
if (level != RIL_SYMBOL || cblob_it_ != NULL)
box.rotate(it_->block()->block->re_rotation());
// Now we have a box in tesseract coordinates relative to the image rectangle,
// we have to convert the coords to a top-down system.
const int pix_height = pixGetHeight(tesseract_->pix_binary());
const int pix_width = pixGetWidth(tesseract_->pix_binary());
*left = ClipToRange(static_cast<int>(box.left()), 0, pix_width);
*top = ClipToRange(pix_height - box.top(), 0, pix_height);
*right = ClipToRange(static_cast<int>(box.right()), *left, pix_width);
*bottom = ClipToRange(pix_height - box.bottom(), *top, pix_height);
return true;
}
jintArray Java_com_googlecode_tesseract_android_PageIterator_nativeBoundingBox(JNIEnv *env,
jclass clazz,
jlong nativePageIterator,
jint level) {
int size = 4;
jintArray result = env->NewIntArray(size);
LOG_ASSERT((result != NULL), "Could not create Java bounding box array!");
PageIterator *pageIterator = (PageIterator *) nativePageIterator;
PageIteratorLevel enumLevel = (PageIteratorLevel) level;
int x1, y1, x2, y2;
pageIterator->BoundingBox(enumLevel, &x1, &y1, &x2, &y2);
// fill a temp structure to use to populate the java int array
jint fill[4];
fill[0] = x1;
fill[1] = y1;
fill[2] = x2;
fill[3] = y2;
env->SetIntArrayRegion(result, 0, size, fill);
return result;
}
