mirror of https://github.com/GNOME/gimp.git
129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/*
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* TWAIN Plug-in
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* Copyright (C) 1999 Craig Setera
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* Craig Setera <setera@home.com>
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* 03/31/1999
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*
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* Based on (at least) the following plug-ins:
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* Screenshot
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* GIF
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* Randomize
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*
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* Any suggestions, bug-reports or patches are welcome.
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*
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* This plug-in interfaces to the TWAIN support library in order
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* to capture images from TWAIN devices directly into GIMP images.
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* The plug-in is capable of acquiring the following type of
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* images:
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* - B/W (1 bit images translated to grayscale B/W)
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* - Grayscale up to 16 bits per pixel
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* - RGB up to 16 bits per sample (24, 30, 36, etc.)
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* - Paletted images (both Gray and RGB)
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*
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* Prerequisites:
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* This plug-in will not compile on anything other than a Win32
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* platform. Although the TWAIN documentation implies that there
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* is TWAIN support available on Macintosh, I neither have a
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* Macintosh nor the interest in porting this. If anyone else
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* has an interest, consult www.twain.org for more information on
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* interfacing to TWAIN.
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*
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* Known problems:
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* - Multiple image transfers will hang the plug-in. The current
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* configuration compiles with a maximum of single image transfers.
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*/
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/*
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* Revision history
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* (02/07/99) v0.1 First working version (internal)
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* (02/09/99) v0.2 First release to anyone other than myself
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* (02/15/99) v0.3 Added image dump and read support for debugging
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* (03/31/99) v0.5 Added support for multi-byte samples and paletted
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* images.
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*/
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#include <windows.h>
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#include "twain.h"
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#include "tw_func.h"
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/*
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* newSession
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*
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* Create a new TWAIN session.
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*/
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pTW_SESSION
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newSession(pTW_IDENTITY appIdentity) {
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/* Create the structure */
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pTW_SESSION session = g_new (TW_SESSION, 1);
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/* Set the structure fields */
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session->hwnd = 0;
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session->twRC = TWRC_SUCCESS;
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session->appIdentity = appIdentity;
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session->dsIdentity = g_new (TW_IDENTITY, 1);
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session->dsIdentity->Id = 0;
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session->dsIdentity->ProductName[0] = '\0';
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session->transferFunctions = NULL;
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if (twainIsAvailable())
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session->twainState = 2;
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else
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session->twainState = 0;
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return session;
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}
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/*
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* registerWindowHandle
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*
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* Register the window handle to be used for this
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* session.
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*/
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void
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registerWindowHandle(pTW_SESSION session, HWND hwnd)
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{
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session->hwnd = hwnd;
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}
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/*
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* registerTransferCallback
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*
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* Register the callback to use when transferring
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* image data.
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*/
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void
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registerTransferCallbacks(pTW_SESSION session,
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pTXFR_CB_FUNCS txfrFuncs,
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void *clientData)
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{
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session->transferFunctions = txfrFuncs;
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session->clientData = clientData;
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}
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/*
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* setClientData
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*
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* Set the client data associated with the specified
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* TWAIN session.
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*/
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void
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setClientData(pTW_SESSION session, void *clientData)
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{
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session->clientData = clientData;
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}
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