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68 lines
2.8 KiB
C++
68 lines
2.8 KiB
C++
/**********************************************************************
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* File: scanedg.h (Formerly scanedge.h)
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* Description: Raster scanning crack based edge extractor.
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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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#ifndef SCANEDG_H
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#define SCANEDG_H
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#include "params.h"
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#include "scrollview.h"
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#include "pdblock.h"
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#include "crakedge.h"
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class C_OUTLINE_IT;
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struct CrackPos {
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CRACKEDGE** free_cracks; // Freelist for fast allocation.
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int x; // Position of new edge.
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int y;
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};
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struct Pix;
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void block_edges(Pix *t_image, // thresholded image
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PDBLK *block, // block in image
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C_OUTLINE_IT* outline_it);
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void make_margins(PDBLK *block, // block in image
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BLOCK_LINE_IT *line_it, // for old style
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uint8_t *pixels, // pixels to strip
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uint8_t margin, // white-out pixel
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int16_t left, // block edges
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int16_t right,
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int16_t y); // line coord );
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void line_edges(int16_t x, // coord of line start
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int16_t y, // coord of line
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int16_t xext, // width of line
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uint8_t uppercolour, // start of prev line
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uint8_t * bwpos, // thresholded line
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CRACKEDGE ** prevline, // edges in progress
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CRACKEDGE **free_cracks,
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C_OUTLINE_IT* outline_it);
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CRACKEDGE *h_edge(int sign, // sign of edge
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CRACKEDGE * join, // edge to join to
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CrackPos* pos);
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CRACKEDGE *v_edge(int sign, // sign of edge
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CRACKEDGE * join, // edge to join to
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CrackPos* pos);
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void join_edges(CRACKEDGE *edge1, // edges to join
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CRACKEDGE *edge2, // no specific order
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CRACKEDGE **free_cracks,
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C_OUTLINE_IT* outline_it);
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void free_crackedges(CRACKEDGE *start);
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#endif
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