pgedit.cpp

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/**********************************************************************
 * File:        pgedit.cpp (Formerly pgeditor.c)
 * Description: Page structure file editor
 * Author:      Phil Cheatle
 *
 *(C) Copyright 1991, Hewlett-Packard Ltd.
 ** 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 automatically generated configuration file if running autoconf.
#ifdef HAVE_CONFIG_H
#  include "config_auto.h"
#endif
 
#include "pgedit.h"
 
#include "blread.h"
#include "control.h"
#include "pageres.h"
#include "paramsd.h"
#include "scrollview.h"
#include "statistc.h"
#include "svmnode.h"
#include "tesseractclass.h"
#include "tordmain.h"
#include "werdit.h"
 
#include <cctype>
#include <cmath>
#include <iomanip> // for std::setprecision
#include <locale>  // for std::locale::classic
#include <sstream> // for std::stringstream
 
#ifndef GRAPHICS_DISABLED
namespace tesseract {
#  define ASC_HEIGHT (2 * kBlnBaselineOffset + kBlnXHeight)
#  define X_HEIGHT (kBlnBaselineOffset + kBlnXHeight)
#  define BL_HEIGHT kBlnBaselineOffset
#  define DESC_HEIGHT 0
 
enum CMD_EVENTS {
  NULL_CMD_EVENT,
  CHANGE_DISP_CMD_EVENT,
  DUMP_WERD_CMD_EVENT,
  SHOW_POINT_CMD_EVENT,
  SHOW_BLN_WERD_CMD_EVENT,
  DEBUG_WERD_CMD_EVENT,
  BLAMER_CMD_EVENT,
  BOUNDING_BOX_CMD_EVENT,
  CORRECT_TEXT_CMD_EVENT,
  POLYGONAL_CMD_EVENT,
  BL_NORM_CMD_EVENT,
  BITMAP_CMD_EVENT,
  IMAGE_CMD_EVENT,
  BLOCKS_CMD_EVENT,
  BASELINES_CMD_EVENT,
  UNIFORM_DISP_CMD_EVENT,
  REFRESH_CMD_EVENT,
  QUIT_CMD_EVENT,
  RECOG_WERDS,
  RECOG_PSEUDO,
  SHOW_BLOB_FEATURES,
  SHOW_SUBSCRIPT_CMD_EVENT,
  SHOW_SUPERSCRIPT_CMD_EVENT,
  SHOW_ITALIC_CMD_EVENT,
  SHOW_BOLD_CMD_EVENT,
  SHOW_UNDERLINE_CMD_EVENT,
  SHOW_FIXEDPITCH_CMD_EVENT,
  SHOW_SERIF_CMD_EVENT,
  SHOW_SMALLCAPS_CMD_EVENT,
  SHOW_DROPCAPS_CMD_EVENT,
};
 
enum ColorationMode {
  CM_RAINBOW,
  CM_SUBSCRIPT,
  CM_SUPERSCRIPT,
  CM_ITALIC,
  CM_BOLD,
  CM_UNDERLINE,
  CM_FIXEDPITCH,
  CM_SERIF,
  CM_SMALLCAPS,
  CM_DROPCAPS
};
 
/*
 *
 *  Some global data
 *
 */
 
static ScrollView *image_win;
static ParamsEditor *pe;
static bool stillRunning = false;
 
static ScrollView *bln_word_window = nullptr; // baseline norm words
 
static CMD_EVENTS mode = CHANGE_DISP_CMD_EVENT; // selected words op
 
static bool recog_done = false; // recog_all_words was called
 
// These variables should remain global, since they are only used for the
// debug mode (in which only a single Tesseract thread/instance will exist).
static std::bitset<16> word_display_mode;
static ColorationMode color_mode = CM_RAINBOW;
static bool display_image = false;
static bool display_blocks = false;
static bool display_baselines = false;
 
static PAGE_RES *current_page_res = nullptr;
 
STRING_VAR(editor_image_win_name, "EditorImage", "Editor image window name");
INT_VAR(editor_image_xpos, 590, "Editor image X Pos");
INT_VAR(editor_image_ypos, 10, "Editor image Y Pos");
static INT_VAR(editor_image_menuheight, 50, "Add to image height for menu bar");
INT_VAR(editor_image_word_bb_color, ScrollView::BLUE, "Word bounding box colour");
INT_VAR(editor_image_blob_bb_color, ScrollView::YELLOW, "Blob bounding box colour");
 
STRING_VAR(editor_word_name, "BlnWords", "BL normalized word window");
INT_VAR(editor_word_xpos, 60, "Word window X Pos");
INT_VAR(editor_word_ypos, 510, "Word window Y Pos");
INT_VAR(editor_word_height, 240, "Word window height");
INT_VAR(editor_word_width, 655, "Word window width");
 
static void show_point(PAGE_RES *page_res, float x, float y) {
  FCOORD pt(x, y);
  PAGE_RES_IT pr_it(page_res);
 
  std::stringstream msg;
  msg.imbue(std::locale::classic());
  msg << std::fixed << std::setprecision(3) << "Pt:(" << x << ", " << y << ") ";
 
  for (WERD_RES *word = pr_it.word(); word != nullptr; word = pr_it.forward()) {
    if (pr_it.row() != pr_it.prev_row() && pr_it.row()->row->bounding_box().contains(pt)) {
      msg << "BL(x)=" << pr_it.row()->row->base_line(x) << ' ';
    }
    if (word->word->bounding_box().contains(pt)) {
      TBOX box = word->word->bounding_box();
      msg << "Wd(" << box.left() << ", " << box.bottom() << ")/("
          << box.right() << ", " << box.top() << ") ";
      C_BLOB_IT cblob_it(word->word->cblob_list());
      for (cblob_it.mark_cycle_pt(); !cblob_it.cycled_list(); cblob_it.forward()) {
        C_BLOB *cblob = cblob_it.data();
        box = cblob->bounding_box();
        if (box.contains(pt)) {
          msg << "CBlb(" << box.left() << ", " << box.bottom() << ")/("
              << box.right() << ", " << box.top() << ") ";
        }
      }
    }
  }
  image_win->AddMessage(msg.str().c_str());
}
 
static void pgeditor_msg( // message display
    const char *msg) {
  image_win->AddMessage(msg);
}
 
class BlnEventHandler : public SVEventHandler {
public:
  void Notify(const SVEvent *sv_event) override {
    if (sv_event->type == SVET_DESTROY) {
      bln_word_window = nullptr;
    } else if (sv_event->type == SVET_CLICK) {
      show_point(current_page_res, sv_event->x, sv_event->y);
    }
  }
};
 
static ScrollView *bln_word_window_handle() { // return handle
                                              // not opened yet
  if (bln_word_window == nullptr) {
    pgeditor_msg("Creating BLN word window...");
    bln_word_window = new ScrollView(editor_word_name.c_str(), editor_word_xpos, editor_word_ypos,
                                     editor_word_width, editor_word_height, 4000, 4000, true);
    auto *a = new BlnEventHandler();
    bln_word_window->AddEventHandler(a);
    pgeditor_msg("Creating BLN word window...Done");
  }
  return bln_word_window;
}
 
static void build_image_window(int width, int height) {
  delete image_win;
  image_win = new ScrollView(editor_image_win_name.c_str(), editor_image_xpos, editor_image_ypos,
                             width + 1, height + editor_image_menuheight + 1, width, height, true);
}
 
static void display_bln_lines(ScrollView *window, ScrollView::Color colour, float scale_factor,
                              float y_offset, float minx, float maxx) {
  window->Pen(colour);
  window->Line(minx, y_offset + scale_factor * DESC_HEIGHT, maxx,
               y_offset + scale_factor * DESC_HEIGHT);
  window->Line(minx, y_offset + scale_factor * BL_HEIGHT, maxx,
               y_offset + scale_factor * BL_HEIGHT);
  window->Line(minx, y_offset + scale_factor * X_HEIGHT, maxx, y_offset + scale_factor * X_HEIGHT);
  window->Line(minx, y_offset + scale_factor * ASC_HEIGHT, maxx,
               y_offset + scale_factor * ASC_HEIGHT);
}
 
void PGEventHandler::Notify(const SVEvent *event) {
  char myval = '0';
  if (event->type == SVET_POPUP) {
    pe->Notify(event);
  } // These are handled by ParamsEditor
  else if (event->type == SVET_EXIT) {
    stillRunning = false;
  } else if (event->type == SVET_MENU) {
    if (strcmp(event->parameter, "true") == 0) {
      myval = 'T';
    } else if (strcmp(event->parameter, "false") == 0) {
      myval = 'F';
    }
    tess_->process_cmd_win_event(event->command_id, &myval);
  } else {
    tess_->process_image_event(*event);
  }
}
 
SVMenuNode *Tesseract::build_menu_new() {
  SVMenuNode *parent_menu;
  auto *root_menu_item = new SVMenuNode();
 
  SVMenuNode *modes_menu_item = root_menu_item->AddChild("MODES");
 
  modes_menu_item->AddChild("Change Display", CHANGE_DISP_CMD_EVENT);
  modes_menu_item->AddChild("Dump Word", DUMP_WERD_CMD_EVENT);
  modes_menu_item->AddChild("Show Point", SHOW_POINT_CMD_EVENT);
  modes_menu_item->AddChild("Show BL Norm Word", SHOW_BLN_WERD_CMD_EVENT);
  modes_menu_item->AddChild("Config Words", DEBUG_WERD_CMD_EVENT);
  modes_menu_item->AddChild("Recog Words", RECOG_WERDS);
  modes_menu_item->AddChild("Recog Blobs", RECOG_PSEUDO);
  modes_menu_item->AddChild("Show Blob Features", SHOW_BLOB_FEATURES);
 
  parent_menu = root_menu_item->AddChild("DISPLAY");
 
  parent_menu->AddChild("Blamer", BLAMER_CMD_EVENT, false);
  parent_menu->AddChild("Bounding Boxes", BOUNDING_BOX_CMD_EVENT, false);
  parent_menu->AddChild("Correct Text", CORRECT_TEXT_CMD_EVENT, false);
  parent_menu->AddChild("Polygonal Approx", POLYGONAL_CMD_EVENT, false);
  parent_menu->AddChild("Baseline Normalized", BL_NORM_CMD_EVENT, false);
  parent_menu->AddChild("Edge Steps", BITMAP_CMD_EVENT, true);
  parent_menu->AddChild("Subscripts", SHOW_SUBSCRIPT_CMD_EVENT);
  parent_menu->AddChild("Superscripts", SHOW_SUPERSCRIPT_CMD_EVENT);
  parent_menu->AddChild("Italics", SHOW_ITALIC_CMD_EVENT);
  parent_menu->AddChild("Bold", SHOW_BOLD_CMD_EVENT);
  parent_menu->AddChild("Underline", SHOW_UNDERLINE_CMD_EVENT);
  parent_menu->AddChild("FixedPitch", SHOW_FIXEDPITCH_CMD_EVENT);
  parent_menu->AddChild("Serifs", SHOW_SERIF_CMD_EVENT);
  parent_menu->AddChild("SmallCaps", SHOW_SMALLCAPS_CMD_EVENT);
  parent_menu->AddChild("DropCaps", SHOW_DROPCAPS_CMD_EVENT);
 
  parent_menu = root_menu_item->AddChild("OTHER");
 
  parent_menu->AddChild("Quit", QUIT_CMD_EVENT);
  parent_menu->AddChild("Show Image", IMAGE_CMD_EVENT, false);
  parent_menu->AddChild("ShowBlock Outlines", BLOCKS_CMD_EVENT, false);
  parent_menu->AddChild("Show Baselines", BASELINES_CMD_EVENT, false);
  parent_menu->AddChild("Uniform Display", UNIFORM_DISP_CMD_EVENT);
  parent_menu->AddChild("Refresh Display", REFRESH_CMD_EVENT);
 
  return root_menu_item;
}
 
void Tesseract::do_re_display(bool (tesseract::Tesseract::*word_painter)(PAGE_RES_IT *pr_it)) {
  int block_count = 1;
 
  image_win->Clear();
  if (display_image) {
    image_win->Draw(pix_binary_, 0, 0);
  }
 
  image_win->Brush(ScrollView::NONE);
  PAGE_RES_IT pr_it(current_page_res);
  for (WERD_RES *word = pr_it.word(); word != nullptr; word = pr_it.forward()) {
    (this->*word_painter)(&pr_it);
    if (display_baselines && pr_it.row() != pr_it.prev_row()) {
      pr_it.row()->row->plot_baseline(image_win, ScrollView::GREEN);
    }
    if (display_blocks && pr_it.block() != pr_it.prev_block()) {
      pr_it.block()->block->pdblk.plot(image_win, block_count++, ScrollView::RED);
    }
  }
  image_win->Update();
}
 
void Tesseract::pgeditor_main(int width, int height, PAGE_RES *page_res) {
  current_page_res = page_res;
  if (current_page_res->block_res_list.empty()) {
    return;
  }
 
  recog_done = false;
  stillRunning = true;
 
  build_image_window(width, height);
  word_display_mode.set(DF_EDGE_STEP);
  do_re_display(&tesseract::Tesseract::word_set_display);
#  ifndef GRAPHICS_DISABLED
  pe = new ParamsEditor(this, image_win);
#  endif
  PGEventHandler pgEventHandler(this);
 
  image_win->AddEventHandler(&pgEventHandler);
  image_win->AddMessageBox();
 
  SVMenuNode *svMenuRoot = build_menu_new();
 
  svMenuRoot->BuildMenu(image_win);
  image_win->SetVisible(true);
 
  image_win->AwaitEvent(SVET_DESTROY);
  image_win->AddEventHandler(nullptr);
}
 
bool Tesseract::process_cmd_win_event( // UI command semantics
    int32_t cmd_event,                 // which menu item?
    char *new_value                    // any prompt data
) {
  char msg[160];
  bool exit = false;
 
  color_mode = CM_RAINBOW;
 
  // Run recognition on the full page if needed.
  switch (cmd_event) {
    case BLAMER_CMD_EVENT:
    case SHOW_SUBSCRIPT_CMD_EVENT:
    case SHOW_SUPERSCRIPT_CMD_EVENT:
    case SHOW_ITALIC_CMD_EVENT:
    case SHOW_BOLD_CMD_EVENT:
    case SHOW_UNDERLINE_CMD_EVENT:
    case SHOW_FIXEDPITCH_CMD_EVENT:
    case SHOW_SERIF_CMD_EVENT:
    case SHOW_SMALLCAPS_CMD_EVENT:
    case SHOW_DROPCAPS_CMD_EVENT:
      if (!recog_done) {
        recog_all_words(current_page_res, nullptr, nullptr, nullptr, 0);
        recog_done = true;
      }
      break;
    default:
      break;
  }
 
  char *parameter;
 
  switch (cmd_event) {
    case NULL_CMD_EVENT:
      break;
 
    case CHANGE_DISP_CMD_EVENT:
    case DUMP_WERD_CMD_EVENT:
    case SHOW_POINT_CMD_EVENT:
    case SHOW_BLN_WERD_CMD_EVENT:
    case RECOG_WERDS:
    case RECOG_PSEUDO:
    case SHOW_BLOB_FEATURES:
      mode = static_cast<CMD_EVENTS>(cmd_event);
      break;
    case DEBUG_WERD_CMD_EVENT:
      mode = DEBUG_WERD_CMD_EVENT;
      parameter = image_win->ShowInputDialog("Config File Name");
      word_config_ = parameter;
      delete[] parameter;
      break;
    case BOUNDING_BOX_CMD_EVENT:
      if (new_value[0] == 'T') {
        word_display_mode.set(DF_BOX);
      } else {
        word_display_mode.reset(DF_BOX);
      }
      mode = CHANGE_DISP_CMD_EVENT;
      break;
    case BLAMER_CMD_EVENT:
      if (new_value[0] == 'T') {
        word_display_mode.set(DF_BLAMER);
      } else {
        word_display_mode.reset(DF_BLAMER);
      }
      do_re_display(&tesseract::Tesseract::word_display);
      mode = CHANGE_DISP_CMD_EVENT;
      break;
    case CORRECT_TEXT_CMD_EVENT:
      if (new_value[0] == 'T') {
        word_display_mode.set(DF_TEXT);
      } else {
        word_display_mode.reset(DF_TEXT);
      }
      mode = CHANGE_DISP_CMD_EVENT;
      break;
    case POLYGONAL_CMD_EVENT:
      if (new_value[0] == 'T') {
        word_display_mode.set(DF_POLYGONAL);
      } else {
        word_display_mode.reset(DF_POLYGONAL);
      }
      mode = CHANGE_DISP_CMD_EVENT;
      break;
    case BL_NORM_CMD_EVENT:
      if (new_value[0] == 'T') {
        word_display_mode.set(DF_BN_POLYGONAL);
      } else {
        word_display_mode.reset(DF_BN_POLYGONAL);
      }
      mode = CHANGE_DISP_CMD_EVENT;
      break;
    case BITMAP_CMD_EVENT:
      if (new_value[0] == 'T') {
        word_display_mode.set(DF_EDGE_STEP);
      } else {
        word_display_mode.reset(DF_EDGE_STEP);
      }
      mode = CHANGE_DISP_CMD_EVENT;
      break;
    case UNIFORM_DISP_CMD_EVENT:
      do_re_display(&tesseract::Tesseract::word_set_display);
      break;
    case IMAGE_CMD_EVENT:
      display_image = (new_value[0] == 'T');
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case BLOCKS_CMD_EVENT:
      display_blocks = (new_value[0] == 'T');
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case BASELINES_CMD_EVENT:
      display_baselines = (new_value[0] == 'T');
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case SHOW_SUBSCRIPT_CMD_EVENT:
      color_mode = CM_SUBSCRIPT;
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case SHOW_SUPERSCRIPT_CMD_EVENT:
      color_mode = CM_SUPERSCRIPT;
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case SHOW_ITALIC_CMD_EVENT:
      color_mode = CM_ITALIC;
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case SHOW_BOLD_CMD_EVENT:
      color_mode = CM_BOLD;
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case SHOW_UNDERLINE_CMD_EVENT:
      color_mode = CM_UNDERLINE;
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case SHOW_FIXEDPITCH_CMD_EVENT:
      color_mode = CM_FIXEDPITCH;
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case SHOW_SERIF_CMD_EVENT:
      color_mode = CM_SERIF;
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case SHOW_SMALLCAPS_CMD_EVENT:
      color_mode = CM_SMALLCAPS;
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case SHOW_DROPCAPS_CMD_EVENT:
      color_mode = CM_DROPCAPS;
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case REFRESH_CMD_EVENT:
      do_re_display(&tesseract::Tesseract::word_display);
      break;
    case QUIT_CMD_EVENT:
      exit = true;
      ScrollView::Exit();
      break;
 
    default:
      snprintf(msg, sizeof(msg), "Unrecognised event %" PRId32 "(%s)", cmd_event, new_value);
      image_win->AddMessage(msg);
      break;
  }
  return exit;
}
 
void Tesseract::process_image_event( // action in image win
    const SVEvent &event) {
  // The following variable should remain static, since it is used by
  // debug editor, which uses a single Tesseract instance.
  static ICOORD down;
  ICOORD up;
  TBOX selection_box;
  char msg[80];
 
  switch (event.type) {
    case SVET_SELECTION:
      if (event.type == SVET_SELECTION) {
        down.set_x(event.x + event.x_size);
        down.set_y(event.y + event.y_size);
        if (mode == SHOW_POINT_CMD_EVENT) {
          show_point(current_page_res, event.x, event.y);
        }
      }
 
      up.set_x(event.x);
      up.set_y(event.y);
 
      selection_box = TBOX(down, up);
 
      switch (mode) {
        case CHANGE_DISP_CMD_EVENT:
          process_selected_words(current_page_res, selection_box,
                                 &tesseract::Tesseract::word_blank_and_set_display);
          break;
        case DUMP_WERD_CMD_EVENT:
          process_selected_words(current_page_res, selection_box,
                                 &tesseract::Tesseract::word_dumper);
          break;
        case SHOW_BLN_WERD_CMD_EVENT:
          process_selected_words(current_page_res, selection_box,
                                 &tesseract::Tesseract::word_bln_display);
          break;
        case DEBUG_WERD_CMD_EVENT:
          debug_word(current_page_res, selection_box);
          break;
        case SHOW_POINT_CMD_EVENT:
          break; // ignore up event
 
        case RECOG_WERDS:
#  ifndef DISABLED_LEGACY_ENGINE
          image_win->AddMessage("Recogging selected words");
          this->process_selected_words(current_page_res, selection_box,
                                       &Tesseract::recog_interactive);
#  endif // ndef DISABLED_LEGACY_ENGINE
          break;
        case RECOG_PSEUDO:
          image_win->AddMessage("Recogging selected blobs");
          recog_pseudo_word(current_page_res, selection_box);
          break;
        case SHOW_BLOB_FEATURES:
          blob_feature_display(current_page_res, selection_box);
          break;
 
        default:
          snprintf(msg, sizeof(msg), "Mode %d not yet implemented", mode);
          image_win->AddMessage(msg);
          break;
      }
    default:
      break;
  }
}
 
void Tesseract::debug_word(PAGE_RES *page_res, const TBOX &selection_box) {
#  ifndef DISABLED_LEGACY_ENGINE
  ResetAdaptiveClassifier();
#  endif
  recog_all_words(page_res, nullptr, &selection_box, word_config_.c_str(), 0);
}
 
/**********************************************************************
 * WERD PROCESSOR FUNCTIONS
 * ========================
 *
 * These routines are invoked by one or more of:
 *    process_all_words()
 *    process_selected_words()
 * or
 *    process_all_words_it()
 *    process_selected_words_it()
 * for each word to be processed
 **********************************************************************/
 
bool Tesseract::word_blank_and_set_display(PAGE_RES_IT *pr_it) {
  pr_it->word()->word->bounding_box().plot(image_win, ScrollView::BLACK, ScrollView::BLACK);
  return word_set_display(pr_it);
}
 
bool Tesseract::word_bln_display(PAGE_RES_IT *pr_it) {
  WERD_RES *word_res = pr_it->word();
  if (word_res->chopped_word == nullptr) {
    // Setup word normalization parameters.
    word_res->SetupForRecognition(unicharset, this, BestPix(), tessedit_ocr_engine_mode, nullptr,
                                  classify_bln_numeric_mode, textord_use_cjk_fp_model,
                                  poly_allow_detailed_fx, pr_it->row()->row, pr_it->block()->block);
  }
  bln_word_window_handle()->Clear();
  display_bln_lines(bln_word_window_handle(), ScrollView::CYAN, 1.0, 0.0f, -1000.0f, 1000.0f);
  C_BLOB_IT it(word_res->word->cblob_list());
  ScrollView::Color color = WERD::NextColor(ScrollView::BLACK);
  for (it.mark_cycle_pt(); !it.cycled_list(); it.forward()) {
    it.data()->plot_normed(word_res->denorm, color, ScrollView::BROWN, bln_word_window_handle());
    color = WERD::NextColor(color);
  }
  bln_word_window_handle()->Update();
  return true;
}
 
bool Tesseract::word_display(PAGE_RES_IT *pr_it) {
  WERD_RES *word_res = pr_it->word();
  WERD *word = word_res->word;
  TBOX word_bb;    // word bounding box
  int word_height; // ht of word BB
  bool displayed_something = false;
  float shift; // from bot left
 
  if (color_mode != CM_RAINBOW && word_res->box_word != nullptr) {
#  ifndef DISABLED_LEGACY_ENGINE
    BoxWord *box_word = word_res->box_word;
    WERD_CHOICE *best_choice = word_res->best_choice;
    int length = box_word->length();
    if (word_res->fontinfo == nullptr) {
      return false;
    }
    const FontInfo &font_info = *word_res->fontinfo;
    for (int i = 0; i < length; ++i) {
      ScrollView::Color color = ScrollView::GREEN;
      switch (color_mode) {
        case CM_SUBSCRIPT:
          if (best_choice->BlobPosition(i) == SP_SUBSCRIPT) {
            color = ScrollView::RED;
          }
          break;
        case CM_SUPERSCRIPT:
          if (best_choice->BlobPosition(i) == SP_SUPERSCRIPT) {
            color = ScrollView::RED;
          }
          break;
        case CM_ITALIC:
          if (font_info.is_italic()) {
            color = ScrollView::RED;
          }
          break;
        case CM_BOLD:
          if (font_info.is_bold()) {
            color = ScrollView::RED;
          }
          break;
        case CM_FIXEDPITCH:
          if (font_info.is_fixed_pitch()) {
            color = ScrollView::RED;
          }
          break;
        case CM_SERIF:
          if (font_info.is_serif()) {
            color = ScrollView::RED;
          }
          break;
        case CM_SMALLCAPS:
          if (word_res->small_caps) {
            color = ScrollView::RED;
          }
          break;
        case CM_DROPCAPS:
          if (best_choice->BlobPosition(i) == SP_DROPCAP) {
            color = ScrollView::RED;
          }
          break;
          // TODO(rays) underline is currently completely unsupported.
        case CM_UNDERLINE:
        default:
          break;
      }
      image_win->Pen(color);
      TBOX box = box_word->BlobBox(i);
      image_win->Rectangle(box.left(), box.bottom(), box.right(), box.top());
    }
    return true;
#  else
    return false;
#  endif // ndef DISABLED_LEGACY_ENGINE
  }
  /*
  Note the double coercions of(COLOUR)((int32_t)editor_image_word_bb_color)
  etc. are to keep the compiler happy.
*/
  // display bounding box
  if (word->display_flag(DF_BOX)) {
    word->bounding_box().plot(image_win,
                              static_cast<ScrollView::Color>((int32_t)editor_image_word_bb_color),
                              static_cast<ScrollView::Color>((int32_t)editor_image_word_bb_color));
 
    auto c = static_cast<ScrollView::Color>((int32_t)editor_image_blob_bb_color);
    image_win->Pen(c);
    // cblob iterator
    C_BLOB_IT c_it(word->cblob_list());
    for (c_it.mark_cycle_pt(); !c_it.cycled_list(); c_it.forward()) {
      c_it.data()->bounding_box().plot(image_win);
    }
    displayed_something = true;
  }
 
  // display edge steps
  if (word->display_flag(DF_EDGE_STEP)) { // edgesteps available
    word->plot(image_win);                // rainbow colors
    displayed_something = true;
  }
 
  // display poly approx
  if (word->display_flag(DF_POLYGONAL)) {
    // need to convert
    TWERD *tword = TWERD::PolygonalCopy(poly_allow_detailed_fx, word);
    tword->plot(image_win);
    delete tword;
    displayed_something = true;
  }
 
  // Display correct text and blamer information.
  std::string text;
  std::string blame;
  if (word->display_flag(DF_TEXT) && word->text() != nullptr) {
    text = word->text();
  }
  if (word->display_flag(DF_BLAMER) &&
      !(word_res->blamer_bundle != nullptr &&
        word_res->blamer_bundle->incorrect_result_reason() == IRR_CORRECT)) {
    text = "";
    const BlamerBundle *blamer_bundle = word_res->blamer_bundle;
    if (blamer_bundle == nullptr) {
      text += "NULL";
    } else {
      text = blamer_bundle->TruthString();
    }
    text += " -> ";
    std::string best_choice_str;
    if (word_res->best_choice == nullptr) {
      best_choice_str = "NULL";
    } else {
      word_res->best_choice->string_and_lengths(&best_choice_str, nullptr);
    }
    text += best_choice_str;
    IncorrectResultReason reason =
        (blamer_bundle == nullptr) ? IRR_PAGE_LAYOUT : blamer_bundle->incorrect_result_reason();
    ASSERT_HOST(reason < IRR_NUM_REASONS);
    blame += " [";
    blame += BlamerBundle::IncorrectReasonName(reason);
    blame += "]";
  }
  if (text.length() > 0) {
    word_bb = word->bounding_box();
    image_win->Pen(ScrollView::RED);
    word_height = word_bb.height();
    int text_height = 0.50 * word_height;
    if (text_height > 20) {
      text_height = 20;
    }
    image_win->TextAttributes("Arial", text_height, false, false, false);
    shift = (word_height < word_bb.width()) ? 0.25 * word_height : 0.0f;
    image_win->Text(word_bb.left() + shift, word_bb.bottom() + 0.25 * word_height, text.c_str());
    if (blame.length() > 0) {
      image_win->Text(word_bb.left() + shift, word_bb.bottom() + 0.25 * word_height - text_height,
                      blame.c_str());
    }
 
    displayed_something = true;
  }
 
  if (!displayed_something) { // display BBox anyway
    word->bounding_box().plot(image_win,
                              static_cast<ScrollView::Color>((int32_t)editor_image_word_bb_color),
                              static_cast<ScrollView::Color>((int32_t)editor_image_word_bb_color));
  }
  return true;
}
} // namespace tesseract
#endif // !GRAPHICS_DISABLED
 
namespace tesseract {
bool Tesseract::word_dumper(PAGE_RES_IT *pr_it) {
  if (pr_it->block()->block != nullptr) {
    tprintf("\nBlock data...\n");
    pr_it->block()->block->print(nullptr, false);
  }
  tprintf("\nRow data...\n");
  pr_it->row()->row->print(nullptr);
  tprintf("\nWord data...\n");
  WERD_RES *word_res = pr_it->word();
  word_res->word->print();
  if (word_res->blamer_bundle != nullptr && wordrec_debug_blamer &&
      word_res->blamer_bundle->incorrect_result_reason() != IRR_CORRECT) {
    tprintf("Current blamer debug: %s\n", word_res->blamer_bundle->debug().c_str());
  }
  return true;
}
 
#ifndef GRAPHICS_DISABLED
bool Tesseract::word_set_display(PAGE_RES_IT *pr_it) {
  WERD *word = pr_it->word()->word;
  word->set_display_flag(DF_BOX, word_display_mode[DF_BOX]);
  word->set_display_flag(DF_TEXT, word_display_mode[DF_TEXT]);
  word->set_display_flag(DF_POLYGONAL, word_display_mode[DF_POLYGONAL]);
  word->set_display_flag(DF_EDGE_STEP, word_display_mode[DF_EDGE_STEP]);
  word->set_display_flag(DF_BN_POLYGONAL, word_display_mode[DF_BN_POLYGONAL]);
  word->set_display_flag(DF_BLAMER, word_display_mode[DF_BLAMER]);
  return word_display(pr_it);
}
 
// page_res is non-const because the iterator doesn't know if you are going
// to change the items it points to! Really a const here though.
void Tesseract::blob_feature_display(PAGE_RES *page_res, const TBOX &selection_box) {
#  ifndef DISABLED_LEGACY_ENGINE
  PAGE_RES_IT *it = make_pseudo_word(page_res, selection_box);
  if (it != nullptr) {
    WERD_RES *word_res = it->word();
    word_res->x_height = it->row()->row->x_height();
    word_res->SetupForRecognition(unicharset, this, BestPix(), tessedit_ocr_engine_mode, nullptr,
                                  classify_bln_numeric_mode, textord_use_cjk_fp_model,
                                  poly_allow_detailed_fx, it->row()->row, it->block()->block);
    TWERD *bln_word = word_res->chopped_word;
    TBLOB *bln_blob = bln_word->blobs[0];
    INT_FX_RESULT_STRUCT fx_info;
    std::vector<INT_FEATURE_STRUCT> bl_features;
    std::vector<INT_FEATURE_STRUCT> cn_features;
    Classify::ExtractFeatures(*bln_blob, classify_nonlinear_norm, &bl_features, &cn_features,
                              &fx_info, nullptr);
    // Display baseline features.
    ScrollView *bl_win = CreateFeatureSpaceWindow("BL Features", 512, 0);
    ClearFeatureSpaceWindow(baseline, bl_win);
    for (auto &bl_feature : bl_features) {
      RenderIntFeature(bl_win, &bl_feature, ScrollView::GREEN);
    }
    bl_win->Update();
    // Display cn features.
    ScrollView *cn_win = CreateFeatureSpaceWindow("CN Features", 512, 0);
    ClearFeatureSpaceWindow(character, cn_win);
    for (auto &cn_feature : cn_features) {
      RenderIntFeature(cn_win, &cn_feature, ScrollView::GREEN);
    }
    cn_win->Update();
 
    it->DeleteCurrentWord();
    delete it;
  }
#  endif // ndef DISABLED_LEGACY_ENGINE
}
 
#endif // !GRAPHICS_DISABLED
 
} // namespace tesseract