/// <summary>
/// Returns the null terminated UTF-8 encoded text string for the current choice
/// </summary>
/// <remarks>
/// NOTE: Unlike LTRResultIterator::GetUTF8Text, the return points to an
/// internal structure and should NOT be delete[]ed to free after use.
/// </remarks>
/// <param name="choiceIteratorHandle"></param>
/// <returns>string</returns>
internal static string ChoiceIteratorGetUTF8Text(HandleRef choiceIteratorHandle)
{
Guard.Require("choiceIteratorHandle", choiceIteratorHandle.Handle != IntPtr.Zero, "ChoiceIterator Handle cannot be a null IntPtr and is required");
IntPtr txtChoiceHandle = Native.ChoiceIteratorGetUTF8TextInternal(choiceIteratorHandle);
return(MarshalHelper.PtrToString(txtChoiceHandle, Encoding.UTF8));
}
public static string BaseApiGetStringVariable(HandleRef handle, string name)
{
var resultHandle = Native.BaseApiGetStringVariableInternal(handle, name);
if (resultHandle != IntPtr.Zero)
{
return(MarshalHelper.PtrToString(resultHandle, Encoding.UTF8));
}
return(null);
}
public static string ResultIteratorWordRecognitionLanguage(HandleRef handle)
{
// per docs (ltrresultiterator.h:118 as of 4897796 in github:tesseract-ocr/tesseract)
// this return value should *NOT* be deleted.
IntPtr txtHandle =
Native.ResultIteratorWordRecognitionLanguageInternal(handle);
return(txtHandle != IntPtr.Zero
? MarshalHelper.PtrToString(txtHandle, Encoding.UTF8)
: null);
}
public static string BaseApiGetVersion()
{
IntPtr versionHandle = Native.GetVersion();
if (versionHandle != IntPtr.Zero)
{
var result = MarshalHelper.PtrToString(versionHandle, Encoding.UTF8);
return(result);
}
return(null);
}
public static string ResultIteratorGetUTF8Text(HandleRef handle, PageIteratorLevel level)
{
var txtHandle = Native.ResultIteratorGetUTF8TextInternal(handle, level);
if (txtHandle != IntPtr.Zero)
{
var result = MarshalHelper.PtrToString(txtHandle, Encoding.UTF8);
Native.DeleteText(txtHandle);
return(result);
}
return(null);
}
public static string BaseAPIGetHOCRText(HandleRef handle, int pageNum)
{
var txtHandle = Native.BaseAPIGetHOCRTextInternal(handle, pageNum);
if (txtHandle != IntPtr.Zero)
{
var result = MarshalHelper.PtrToString(txtHandle, Encoding.UTF8);
Native.DeleteText(txtHandle);
return(htmlBeginTag + result + htmlEndTag);
}
return(null);
}
public static string BaseAPIGetUTF8Text(HandleRef handle)
{
var txtHandle = Native.BaseAPIGetUTF8TextInternal(handle);
if (txtHandle != IntPtr.Zero)
{
var result = MarshalHelper.PtrToString(txtHandle, Encoding.UTF8);
Native.DeleteText(txtHandle);
return(result);
}
return(null);
}
public static string BaseAPIGetWordStrBoxText(HandleRef handle, int pageNum)
{
IntPtr txtHandle = Native.BaseApiGetWordStrBoxTextInternal(handle, pageNum);
if (txtHandle != IntPtr.Zero)
{
var result = MarshalHelper.PtrToString(txtHandle, Encoding.UTF8);
TessApi.Native.DeleteText(txtHandle);
return(result);
}
else
{
return(null);
}
}
public static string ResultIteratorGetUTF8Text(IntPtr handle, PageIteratorLevel level)
{
IntPtr txtHandle = ResultIteratorGetUTF8TextInternal(handle, level);
if (txtHandle != IntPtr.Zero)
{
var result = MarshalHelper.PtrToString(txtHandle, Encoding.UTF8);
TessApi.DeleteText(txtHandle);
return(result);
}
else
{
return(null);
}
}
public static string BaseAPIGetHOCRText(IntPtr handle, int pageNum)
{
IntPtr txtHandle = BaseAPIGetHOCRTextInternal(handle, pageNum);
if (txtHandle != IntPtr.Zero)
{
var result = MarshalHelper.PtrToString(txtHandle, Encoding.UTF8);
TessApi.DeleteText(txtHandle);
return(htmlBeginTag + result + htmlEndTag);
}
else
{
return(null);
}
}
public static string BaseAPIGetUTF8Text(IntPtr handle)
{
IntPtr txtHandle = BaseAPIGetUTF8TextInternal(handle);
if (txtHandle != IntPtr.Zero)
{
var result = MarshalHelper.PtrToString(txtHandle, Encoding.UTF8);
TessApi.DeleteText(txtHandle);
return(result);
}
else
{
return(null);
}
}
public static string ResultIteratorGetWordRecognitionLanguage(HandleRef handle)
{
IntPtr txtHandle = Native.ResultIteratorGetWordRecognitionLanguageInternal(handle);
if (txtHandle != IntPtr.Zero)
{
var result = MarshalHelper.PtrToString(txtHandle, Encoding.UTF8);
// txtHandle must not be deleted, see method WordRecognistionLanguage
// in tesseract/ccmain/ltrresultiterator.h.
return(result);
}
else
{
return(null);
}
}
public static string ResultIteratorGetWordFontAttributes(HandleRef handle,
out bool isBold, out bool isItalic, out bool isUnderlined,
out bool isMonospace, out bool isSerif, out bool isSmallCaps,
out int pointSize, out int fontId)
{
int bold, italic, underlined, monospace, serif, smallCaps;
IntPtr txtHandle = Native.ResultIteratorGetWordFontAttributesInternal(handle,
out bold, out italic, out underlined,
out monospace, out serif, out smallCaps,
out pointSize, out fontId);
if (txtHandle != IntPtr.Zero)
{
var result = MarshalHelper.PtrToString(txtHandle, Encoding.UTF8);
// txtHandle must not be deleted, see method WordFontAttributes
// in tesseract/ccmain/ltrresultiterator.h.
isBold = Convert.ToBoolean(bold);
isItalic = Convert.ToBoolean(italic);
isUnderlined = Convert.ToBoolean(underlined);
isMonospace = Convert.ToBoolean(monospace);
isSerif = Convert.ToBoolean(serif);
isSmallCaps = Convert.ToBoolean(smallCaps);
return(result);
}
else
{
isBold = false;
isItalic = false;
isUnderlined = false;
isMonospace = false;
isSerif = false;
isSmallCaps = false;
pointSize = 0;
fontId = -1;
return(null);
}
}
internal static string getLeptonicaVersion()
{
return(MarshalHelper.PtrToString(getLeptonicaVersionInternal()));
}
internal static string BaseApiGetStringVariable(HandleRef handle, string name)
{
return(MarshalHelper.PtrToString(BaseApiGetStringVariableInternal(handle, name))); // return string cannot be deleted, it comes from a c_str call.
}
internal static extern IntPtr ChoiceIteratorGetUTF8TextInternal(HandleRef handle); // Returns internal memory
internal static string ChoiceIteratorGetUTF8Text(HandleRef handle)
{
return(MarshalHelper.PtrToString(ChoiceIteratorGetUTF8TextInternal(handle)));
}
internal static string GetVersion()
{
return(MarshalHelper.PtrToString(GetVersionInternal())); // Do not free as it is a constant on the stack
}
