mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-11-24 02:59:07 +08:00
4c3475ad2e
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@890 d0cd1f9f-072b-0410-8dd7-cf729c803f20
236 lines
5.8 KiB
C++
236 lines
5.8 KiB
C++
// Include automatically generated configuration file if running autoconf.
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#ifdef HAVE_CONFIG_H
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#include "config_auto.h"
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#endif
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#include <string.h>
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#include "baseapi.h"
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#include "genericvector.h"
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#include "renderer.h"
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#if !defined(VERSION)
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#include "version.h"
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#endif
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namespace tesseract {
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// Start with a 4K output buffer which should be pretty big for a page of text
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// though might need to grow for other formats or multi-page documents.
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static const int kInitialAlloc = 1 << 12;
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/**********************************************************************
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* Base Renderer interface implementation
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**********************************************************************/
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TessResultRenderer::TessResultRenderer(const char* type, const char* extension)
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: full_typename_(type), file_extension_(extension),
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title_(""), imagenum_(-1),
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output_data_(NULL),
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next_(NULL) {
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ResetData();
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}
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TessResultRenderer::~TessResultRenderer() {
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delete[] output_data_;
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delete next_;
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}
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void TessResultRenderer::insert(TessResultRenderer* next) {
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if (next == NULL) return;
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TessResultRenderer* remainder = next_;
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next_ = next;
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if (remainder) {
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while (next->next_ != NULL) {
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next = next->next_;
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}
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next->next_ = remainder;
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}
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}
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bool TessResultRenderer::BeginDocument(const char* title) {
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ResetData();
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title_ = title;
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imagenum_ = -1;
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bool ok = BeginDocumentHandler();
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if (next_) {
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ok = next_->BeginDocument(title) && ok;
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}
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return ok;
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}
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bool TessResultRenderer::AddImage(TessBaseAPI* api) {
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++imagenum_;
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bool ok = AddImageHandler(api);
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if (next_) {
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ok = next_->AddImage(api) && ok;
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}
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return ok;
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}
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bool TessResultRenderer::AddError(TessBaseAPI* api) {
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++imagenum_;
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bool ok = AddErrorHandler(api);
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if (next_) {
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ok = next_->AddError(api) && ok;
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}
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return ok;
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}
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bool TessResultRenderer::EndDocument() {
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bool ok = EndDocumentHandler();
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if (next_) {
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ok = next_->EndDocument() && ok;
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}
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return ok;
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}
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bool TessResultRenderer::GetOutput(const char** data, int* data_len) const {
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*data = output_data_;
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*data_len = output_len_;
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return true;
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}
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void TessResultRenderer::ResetData() {
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delete[] output_data_;
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output_data_ = new char[kInitialAlloc];
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output_alloc_ = kInitialAlloc;
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output_len_ = 0;
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}
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void TessResultRenderer::ReserveAdditionalData(int relative_len) {
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int total = relative_len + output_len_;
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if (total <= output_alloc_)
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return;
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if (total < 2 * output_alloc_) {
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total = 2 * output_alloc_;
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}
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char* new_data = new char[total];
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memcpy(new_data, output_data_, output_len_);
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delete[] output_data_;
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output_data_ = new_data;
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}
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void TessResultRenderer::AppendString(const char* s) {
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AppendData(s, strlen(s));
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}
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void TessResultRenderer::AppendData(const char* s, int len) {
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ReserveAdditionalData(len);
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memcpy(output_data_ + output_len_, s, len);
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output_len_ += len;
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}
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bool TessResultRenderer::BeginDocumentHandler() {
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return true;
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}
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bool TessResultRenderer::AddErrorHandler(TessBaseAPI* api) {
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return true;
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}
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bool TessResultRenderer::EndDocumentHandler() {
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return true;
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}
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/**********************************************************************
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* UTF8 Text Renderer interface implementation
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**********************************************************************/
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TessTextRenderer::TessTextRenderer()
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: TessResultRenderer("Text", "txt") {
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}
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bool TessTextRenderer::AddImageHandler(TessBaseAPI* api) {
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char* utf8 = api->GetUTF8Text();
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if (utf8 == NULL) {
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return false;
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}
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AppendString(utf8);
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delete[] utf8;
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return true;
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}
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/**********************************************************************
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* HOcr Text Renderer interface implementation
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**********************************************************************/
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TessHOcrRenderer::TessHOcrRenderer()
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: TessResultRenderer("HOcr", "hocr") {
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}
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bool TessHOcrRenderer::BeginDocumentHandler() {
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AppendString(
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"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
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"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
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" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n"
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"<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\" "
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"lang=\"en\">\n <head>\n <title>\n");
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AppendString(title());
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AppendString(
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"</title>\n"
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"<meta http-equiv=\"Content-Type\" content=\"text/html;"
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"charset=utf-8\" />\n"
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" <meta name='ocr-system' content='tesseract " VERSION "' />\n"
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" <meta name='ocr-capabilities' content='ocr_page ocr_carea ocr_par"
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" ocr_line ocrx_word'/>\n"
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"</head>\n<body>\n");
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return true;
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}
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bool TessHOcrRenderer::EndDocumentHandler() {
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AppendString(" </body>\n</html>\n");
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return true;
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}
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bool TessHOcrRenderer::AddImageHandler(TessBaseAPI* api) {
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char* hocr = api->GetHOCRText(imagenum());
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if (hocr == NULL) return false;
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AppendString(hocr);
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delete[] hocr;
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return true;
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}
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/**********************************************************************
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* UNLV Text Renderer interface implementation
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**********************************************************************/
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TessUnlvRenderer::TessUnlvRenderer()
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: TessResultRenderer("UNLV", "unlv") {
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}
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bool TessUnlvRenderer::AddImageHandler(TessBaseAPI* api) {
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char* unlv = api->GetUNLVText();
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if (unlv == NULL) return false;
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AppendString(unlv);
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delete[] unlv;
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return true;
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}
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/**********************************************************************
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* BoxText Renderer interface implementation
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**********************************************************************/
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TessBoxTextRenderer::TessBoxTextRenderer()
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: TessResultRenderer("Box Text", "box") {
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}
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bool TessBoxTextRenderer::AddImageHandler(TessBaseAPI* api) {
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char* text = api->GetBoxText(imagenum());
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if (text == NULL) return false;
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AppendString(text);
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delete[] text;
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return true;
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}
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} // namespace tesseract
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