view release on metacpan or  search on metacpan

src/Source/FreeImage/PluginG3.cpp  view on Meta::CPAN

		rowbuf = (BYTE*) _TIFFmalloc(linesize);
		refbuf = (BYTE*) _TIFFmalloc(linesize);
		if (rowbuf == NULL || refbuf == NULL) {
			throw FI_MSG_ERROR_MEMORY;
		}

		tifin->tif_rawdatasize = G3GetFileSize(io, handle);
		tifin->tif_rawdata = (tidata_t) _TIFFmalloc(tifin->tif_rawdatasize);
		if (tifin->tif_rawdata == NULL) {
			throw FI_MSG_ERROR_MEMORY;
		}
			
		if(!G3ReadFile(io, handle, tifin->tif_rawdata, tifin->tif_rawdatasize)) {
			throw "Read error at scanline 0";
		}
		tifin->tif_rawcp = tifin->tif_rawdata;
		tifin->tif_rawcc = tifin->tif_rawdatasize;

		(*tifin->tif_setupdecode)(tifin);
		(*tifin->tif_predecode)(tifin, (uint16) 0);
		tifin->tif_row = 0;
		badfaxlines = 0;
		badfaxrun = 0;

		_TIFFmemset(refbuf, 0, linesize);
		row = 0;
		badrun = 0;		// current run of bad lines 
		while (tifin->tif_rawcc > 0) {
			ok = (*tifin->tif_decoderow)(tifin, rowbuf, linesize, 0);
			if (!ok) {
				badfaxlines++;
				badrun++;
				// regenerate line from previous good line 
				_TIFFmemcpy(rowbuf, refbuf, linesize);
			} else {
				if (badrun > badfaxrun)
					badfaxrun = badrun;
				badrun = 0;
				_TIFFmemcpy(refbuf, rowbuf, linesize);
			}
			tifin->tif_row++;

			FreeImage_WriteMemory(rowbuf, linesize, 1, memory);
			row++;
			if (stretch) {
				FreeImage_WriteMemory(rowbuf, linesize, 1, memory);
				row++;
			}
		}
		if (badrun > badfaxrun)
			badfaxrun = badrun;

		_TIFFfree(tifin->tif_rawdata);
		tifin->tif_rawdata = NULL;

		_TIFFfree(rowbuf);
		_TIFFfree(refbuf);

		/*
		if (verbose) {
			fprintf(stderr, "%d rows in input\n", rows);
			fprintf(stderr, "%ld total bad rows\n", (long) badfaxlines);
			fprintf(stderr, "%d max consecutive bad rows\n", badfaxrun);
		}
		*/

	} catch(const char *message) {
		if(rowbuf) _TIFFfree(rowbuf);
		if(refbuf) _TIFFfree(refbuf);
		if(tifin->tif_rawdata) {
			_TIFFfree(tifin->tif_rawdata);
			tifin->tif_rawdata = NULL;
		}
		FreeImage_OutputMessageProc(s_format_id, message);

		return -1;
	}

	return (row);
}


// ==========================================================
// Plugin Implementation
// ==========================================================

static const char * DLL_CALLCONV
Format() {
	return "G3";
}

static const char * DLL_CALLCONV 
Description() {
	return "Raw fax format CCITT G.3";
}

static const char * DLL_CALLCONV 
Extension() {
	return "g3";
}

static const char * DLL_CALLCONV 
RegExpr() {
	return NULL; // there is now reasonable regexp for raw G3
}

static const char * DLL_CALLCONV 
MimeType() {
	return "image/fax-g3";
}

static BOOL DLL_CALLCONV 
SupportsExportDepth(int depth) {
	return	FALSE;
}

// ----------------------------------------------------------

static FIBITMAP * DLL_CALLCONV
Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) {
	TIFF *faxTIFF = NULL;
	FIBITMAP *dib = NULL;
	FIMEMORY *memory = NULL;