зеркало из https://github.com/mozilla/gecko-dev.git
140 строки
2.9 KiB
C++
140 строки
2.9 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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* nsPNGDecoder.cpp --- interface to png decoder
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*/
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#include "nsPNGDecoder.h"
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#include "pngdec.h"
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/*-----------class----------------*/
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/*-------------------------------------------------*/
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PNGDecoder::PNGDecoder(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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PNGDecoder::~PNGDecoder(void)
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{
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};
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NS_IMPL_ISUPPORTS1(PNGDecoder, nsIImgDecoder)
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NS_METHOD
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PNGDecoder::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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PNGDecoder *decoder = new PNGDecoder(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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NS_IMETHODIMP
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PNGDecoder::ImgDInit()
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{
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int ret;
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if( ilContainer != NULL ) {
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ret = il_png_init(ilContainer);
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if(!ret)
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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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PNGDecoder::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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PNGDecoder::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_png_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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PNGDecoder::ImgDComplete()
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{
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int ret;
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if( ilContainer != NULL ) {
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ret = il_png_complete(ilContainer);
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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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PNGDecoder::ImgDAbort()
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{
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int ret;
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if( ilContainer != NULL ) {
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ret = il_png_abort(ilContainer);
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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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