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https://github.com/tesseract-ocr/tesseract.git
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75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
/**********************************************************************
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* File: blread.cpp (Formerly pdread.c)
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* Description: Friend function of BLOCK to read the uscan pd file.
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* Author: Ray Smith
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*
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* (C) Copyright 1991, Hewlett-Packard Ltd.
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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** http://www.apache.org/licenses/LICENSE-2.0
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*
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**********************************************************************/
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#include "blread.h"
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#include "ocrblock.h" // for BLOCK_IT, BLOCK, BLOCK_LIST (ptr only)
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#include "scanutils.h" // for tfscanf
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#include <cstdio> // for fclose, fopen, FILE
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namespace tesseract {
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#define UNLV_EXT ".uzn" // unlv zone file
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/**********************************************************************
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* read_unlv_file
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*
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* Read a whole unlv zone file to make a list of blocks.
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**********************************************************************/
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bool read_unlv_file( //print list of sides
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std::string& name, //basename of file
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int32_t xsize, //image size
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int32_t ysize, //image size
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BLOCK_LIST* blocks //output list
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) {
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FILE *pdfp; //file pointer
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BLOCK *block; //current block
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int x; //current top-down coords
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int y;
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int width; //of current block
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int height;
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BLOCK_IT block_it = blocks; //block iterator
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name += UNLV_EXT; //add extension
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if ((pdfp = fopen (name.c_str (), "rb")) == nullptr) {
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return false; //didn't read one
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} else {
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while (tfscanf(pdfp, "%d %d %d %d %*s", &x, &y, &width, &height) >= 4) {
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//make rect block
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block = new BLOCK (name.c_str (), true, 0, 0,
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static_cast<int16_t>(x), static_cast<int16_t>(ysize - y - height),
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static_cast<int16_t>(x + width), static_cast<int16_t>(ysize - y));
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//on end of list
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block_it.add_to_end (block);
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}
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fclose(pdfp);
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}
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tprintf("UZN file %s loaded.\n", name.c_str());
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return true;
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}
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void FullPageBlock(int width, int height, BLOCK_LIST *blocks) {
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BLOCK_IT block_it(blocks);
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auto* block = new BLOCK("", true, 0, 0, 0, 0, width, height);
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block_it.add_to_end(block);
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}
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} // namespace tesseract
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