132 lines
2.8 KiB
C++
132 lines
2.8 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/* -*- Mode: C; tab-width: 4 -*-
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* nsJPGDecoder.cpp --- interface to JPG decoder
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*/
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#include "nsCOMPtr.h"
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#include "nsJPGDecoder.h"
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#include "jpeg.h"
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//////////////////////////////////////////////////////////////////////
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// JPG Decoder Implementation
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NS_IMPL_ISUPPORTS1(JPGDecoder, nsIImgDecoder);
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JPGDecoder::JPGDecoder(il_container* aContainer)
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{
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NS_INIT_REFCNT();
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ilContainer = aContainer;
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}
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JPGDecoder::~JPGDecoder(void)
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{
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}
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NS_METHOD
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JPGDecoder::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
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{
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nsresult rv;
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if (aOuter) return NS_ERROR_NO_AGGREGATION;
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il_container *ic = new il_container();
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if (!ic) return NS_ERROR_OUT_OF_MEMORY;
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JPGDecoder *decoder = new JPGDecoder(ic);
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if (!decoder) {
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delete ic;
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return NS_ERROR_OUT_OF_MEMORY;
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}
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NS_ADDREF(decoder);
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rv = decoder->QueryInterface(aIID, aResult);
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NS_RELEASE(decoder);
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/* why are we creating and destroying this object for no reason? */
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delete ic; /* is a place holder */
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return rv;
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}
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/*------------------------------------------------------*/
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/* api functions
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*/
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/*------------------------------------------------------*/
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NS_IMETHODIMP
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JPGDecoder::ImgDInit()
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{
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int ret;
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if( ilContainer != NULL ) {
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ret = il_jpeg_init(ilContainer);
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if(ret != 1)
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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JPGDecoder::ImgDWriteReady(PRUint32 *max_read)
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{
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/* dummy return needed */
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*max_read = 2048;
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return NS_OK;
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}
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NS_IMETHODIMP
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JPGDecoder::ImgDWrite(const unsigned char *buf, int32 len)
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{
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int ret;
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if( ilContainer != NULL ) {
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ret = il_jpeg_write(ilContainer, buf,len);
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if(ret != 0)
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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JPGDecoder::ImgDComplete()
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{
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if( ilContainer != NULL ) {
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il_jpeg_complete(ilContainer);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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JPGDecoder::ImgDAbort()
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{
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if( ilContainer != NULL ) {
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il_jpeg_abort(ilContainer);
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}
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return NS_OK;
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}
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