home *** CD-ROM | disk | FTP | other *** search
- /*
- * TWAIN Plug-in
- * Copyright (C) 1999 Craig Setera
- * Craig Setera <setera@home.com>
- * 03/31/1999
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- *
- * Based on (at least) the following plug-ins:
- * Screenshot
- * GIF
- * Randomize
- *
- * Any suggestions, bug-reports or patches are welcome.
- *
- * This plug-in interfaces to the TWAIN support library in order
- * to capture images from TWAIN devices directly into GIMP images.
- * The plug-in is capable of acquiring the following type of
- * images:
- * - B/W (1 bit images translated to grayscale B/W)
- * - Grayscale up to 16 bits per pixel
- * - RGB up to 16 bits per sample (24, 30, 36, etc.)
- * - Paletted images (both Gray and RGB)
- *
- * Prerequisites:
- * This plug-in will not compile on anything other than a Win32
- * platform. Although the TWAIN documentation implies that there
- * is TWAIN support available on Macintosh, I neither have a
- * Macintosh nor the interest in porting this. If anyone else
- * has an interest, consult www.twain.org for more information on
- * interfacing to TWAIN.
- *
- * Known problems:
- * - Multiple image transfers will hang the plug-in. The current
- * configuration compiles with a maximum of single image transfers.
- */
-
- /*
- * Revision history
- * (02/07/99) v0.1 First working version (internal)
- * (02/09/99) v0.2 First release to anyone other than myself
- * (02/15/99) v0.3 Added image dump and read support for debugging
- * (03/31/99) v0.5 Added support for multi-byte samples and paletted
- * images.
- */
- #include <glib.h> /* Needed when compiling with gcc */
-
- #include <stdio.h>
- #include <windows.h>
- #include <stdarg.h>
- #include <stdlib.h>
- #include <string.h>
- #include <time.h>
- #include "tw_util.h"
- #ifdef _DEBUG
- #include "tw_func.h"
- FILE *logFile = NULL;
- #endif
-
- #ifdef _DEBUG
- /*
- * LogMessage
- */
- void
- LogMessage(char *format, ...)
- {
- va_list args;
- time_t time_of_day;
- char *ctime_string;
-
- /* Open the log file as necessary */
- if (!logFile)
- logFile = fopen("c:\\twain.log", "w");
-
- time_of_day = time(NULL);
- ctime_string = ctime(&time_of_day);
- ctime_string[19] = '\0';
-
- fprintf(logFile, "[%s] ", (ctime_string + 11));
- va_start(args, format);
- vfprintf(logFile, format, args);
- fflush(logFile);
- va_end(args);
- }
-
- /*
- * LogLastWinError
- *
- * Log the last Windows error as returned by
- * GetLastError.
- */
- void
- LogLastWinError(void)
- {
- LPVOID lpMsgBuf;
-
- FormatMessage(
- FORMAT_MESSAGE_ALLOCATE_BUFFER |
- FORMAT_MESSAGE_FROM_SYSTEM |
- FORMAT_MESSAGE_IGNORE_INSERTS,
- NULL,
- GetLastError(),
- MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), /* Default language */
- (LPTSTR) &lpMsgBuf,
- 0,
- NULL
- );
-
- LogMessage("%s\n", lpMsgBuf);
-
- /* Free the buffer. */
- LocalFree( lpMsgBuf );
-
- }
-
- void
- logBegin(pTW_IMAGEINFO imageInfo, void *clientData)
- {
- int i;
- char buffer[256];
-
- LogMessage("\n");
- LogMessage("*************************************\n");
- LogMessage("\n");
- LogMessage("Image transfer begin:\n");
- /* LogMessage("\tClient data: %s\n", (char *) clientData); */
-
- /* Log the image information */
- LogMessage("Image information:\n");
- LogMessage("\tXResolution: %f\n", FIX32ToFloat(imageInfo->XResolution));
- LogMessage("\tYResolution: %f\n", FIX32ToFloat(imageInfo->YResolution));
- LogMessage("\tImageWidth: %d\n", imageInfo->ImageWidth);
- LogMessage("\tImageLength: %d\n", imageInfo->ImageLength);
- LogMessage("\tSamplesPerPixel: %d\n", imageInfo->SamplesPerPixel);
- sprintf(buffer, "\tBitsPerSample: {");
- for (i = 0; i < 8; i++) {
- if (imageInfo->BitsPerSample[i])
- strcat(buffer, "1");
- else
- strcat(buffer, "0");
-
- if (i != 7)
- strcat(buffer, ",");
- }
- LogMessage("%s}\n", buffer);
-
- LogMessage("\tBitsPerPixel: %d\n", imageInfo->BitsPerPixel);
- LogMessage("\tPlanar: %s\n", (imageInfo->Planar ? "TRUE" : "FALSE"));
- LogMessage("\tPixelType: %d\n", imageInfo->PixelType);
- /* Compression */
-
- }
-
- void
- logData(pTW_IMAGEINFO imageInfo,
- pTW_IMAGEMEMXFER imageMemXfer,
- void *clientData)
- {
- LogMessage("Image transfer callback called:\n");
- LogMessage("\tClient data: %s\n", (char *) clientData);
- LogMessage("Memory block transferred:\n");
- LogMessage("\tBytesPerRow = %d\n", imageMemXfer->BytesPerRow);
- LogMessage("\tColumns = %d\n", imageMemXfer->Columns);
- LogMessage("\tRows = %d\n", imageMemXfer->Rows);
- LogMessage("\tXOffset = %d\n", imageMemXfer->XOffset);
- LogMessage("\tYOffset = %d\n", imageMemXfer->YOffset);
- LogMessage("\tBytesWritten = %d\n", imageMemXfer->BytesWritten);
- }
-
- #else
-
- /*
- * LogMessage
- */
- void
- LogMessage(char *format, ...)
- {
- }
-
- /*
- * LogLastWinError
- *
- * Log the last Windows error as returned by
- * GetLastError.
- */
- void
- LogLastWinError(void)
- {
- }
-
- #endif /* DEBUG */
-