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On Wed, Jun 6, 2018 at 2:24 PM Paul TOTH <papa2enfa...@gmail.com> wrote:
> Hello,
>
> I'm not a C++ developer and I'm new to the project so I don't want to
> disturb the repository with my code...but, I've made some changes that
> could be interesting.
>
> my purpose was to use libTesseract (3) from a Delphi application.
>
> first change, I've added a function to deal with in-memory image.
>
> TESS_API BOOL TESS_CALL TessBaseAPIProcessPagesData(TessBaseAPI* handle,
> const unsigned char* imagedata, int imagesize, ETEXT_DESC* monitor,
> TessResultRenderer* renderer);
>
> the code is almost the same as for stdin but with provided imagedata and
> with a monitor to handle progression.
>
> then I'de like to add my own output handler so I've added this function
>
> typedef int(*WRITE_FUNC)(void* sender, const char* data, int size);
>
> TESS_API void TESS_CALL TessResultRendererWriteCallback(TessResultRenderer
> * renderer, WRITE_FUNC writefunc, void* sender);
>
>
> with just a fix on TessResultRenderer
>
> void TessResultRenderer::AppendData(const char* s, int len) {
> int n = writefunc_ ? writefunc_(writesender_, s, len) : fwrite(s, 1, len
> , fout_);
> if (n != len) happy_ = false;
> }
>
> Now I am able to convert any image from a memory stream to a any kind of
> stream...this is usefull for database image processing.
>
> it could be better with a source image streaming but it require more
> changes.
>
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