Tesseract  3.02
tesseract-ocr/textord/drawedg.cpp
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00001 /**********************************************************************
00002  * File:        drawedg.c  (Formerly drawedge.c)
00003  * Description: Collection of functions to draw things to do with edge detection.
00004  * Author:                  Ray Smith
00005  * Created:                 Thu Jun 06 13:29:20 BST 1991
00006  *
00007  * (C) Copyright 1991, Hewlett-Packard Ltd.
00008  ** Licensed under the Apache License, Version 2.0 (the "License");
00009  ** you may not use this file except in compliance with the License.
00010  ** You may obtain a copy of the License at
00011  ** http://www.apache.org/licenses/LICENSE-2.0
00012  ** Unless required by applicable law or agreed to in writing, software
00013  ** distributed under the License is distributed on an "AS IS" BASIS,
00014  ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00015  ** See the License for the specific language governing permissions and
00016  ** limitations under the License.
00017  *
00018  **********************************************************************/
00019 
00020 #include "mfcpch.h"
00021 #include          "drawedg.h"
00022 
00023 // Include automatically generated configuration file if running autoconf.
00024 #ifdef HAVE_CONFIG_H
00025 #include "config_auto.h"
00026 #endif
00027 
00028 #ifndef GRAPHICS_DISABLED
00029 
00031 #define IMAGE_WIN_NAME    "Edges"
00032 #define IMAGE_XPOS      250
00033 
00034 #define IMAGE_YPOS      0
00035 
00036 #define EXTERN
00037 
00045 ScrollView* create_edges_window(ICOORD page_tr) {
00046   ScrollView* image_win;              //image window
00047 
00048                                  //create the window
00049   image_win = new ScrollView (IMAGE_WIN_NAME, IMAGE_XPOS, IMAGE_YPOS, 0, 0, page_tr.x (),  page_tr.y ());
00050   return image_win;              //window
00051 }
00052 
00053 
00063 void draw_raw_edge(ScrollView* fd,
00064                    CRACKEDGE *start,
00065                    ScrollView::Color colour) {
00066   CRACKEDGE *edgept;             //current point
00067 
00068   fd->Pen(colour);
00069   edgept = start;
00070   fd->SetCursor(edgept->pos.x (), edgept->pos.y ());
00071   do {
00072     do
00073     edgept = edgept->next;
00074                                  //merge straight lines
00075     while (edgept != start && edgept->prev->stepx == edgept->stepx && edgept->prev->stepy == edgept->stepy);
00076 
00077                                  //draw lines
00078   fd->DrawTo(edgept->pos.x (), edgept->pos.y ());
00079   }
00080   while (edgept != start);
00081 }
00082 
00083 #endif  // GRAPHICS_DISABLED