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122 lines
3.9 KiB
C++
122 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Stuart Parmenter <pavlov@netscape.com>
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* Bobby Holley <bobbyholley@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsPNGDecoder_h__
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#define nsPNGDecoder_h__
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#include "Decoder.h"
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#include "imgIDecoderObserver.h"
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#include "gfxASurface.h"
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#include "nsCOMPtr.h"
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#include "png.h"
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#include "qcms.h"
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namespace mozilla {
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namespace imagelib {
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class RasterImage;
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class nsPNGDecoder : public Decoder
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{
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public:
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nsPNGDecoder();
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virtual ~nsPNGDecoder();
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virtual void InitInternal();
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virtual void WriteInternal(const char* aBuffer, PRUint32 aCount);
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void CreateFrame(png_uint_32 x_offset, png_uint_32 y_offset,
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PRInt32 width, PRInt32 height,
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gfxASurface::gfxImageFormat format);
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void SetAnimFrameInfo();
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void EndImageFrame();
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public:
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png_structp mPNG;
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png_infop mInfo;
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nsIntRect mFrameRect;
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PRUint8 *mCMSLine;
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PRUint8 *interlacebuf;
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PRUint8 *mImageData;
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qcms_profile *mInProfile;
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qcms_transform *mTransform;
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gfxASurface::gfxImageFormat format;
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// For size decodes
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PRUint8 *mHeaderBuf;
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PRUint32 mHeaderBytesRead;
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PRUint8 mChannels;
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PRPackedBool mFrameHasNoAlpha;
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PRPackedBool mFrameIsHidden;
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// whether CMS or premultiplied alpha are forced off
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PRUint32 mCMSMode;
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PRPackedBool mDisablePremultipliedAlpha;
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/*
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* libpng callbacks
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*
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* We put these in the class so that they can access protected members.
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*/
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static void PNGAPI info_callback(png_structp png_ptr, png_infop info_ptr);
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static void PNGAPI row_callback(png_structp png_ptr, png_bytep new_row,
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png_uint_32 row_num, int pass);
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#ifdef PNG_APNG_SUPPORTED
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static void PNGAPI frame_info_callback(png_structp png_ptr,
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png_uint_32 frame_num);
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#endif
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static void PNGAPI end_callback(png_structp png_ptr, png_infop info_ptr);
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static void PNGAPI error_callback(png_structp png_ptr,
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png_const_charp error_msg);
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static void PNGAPI warning_callback(png_structp png_ptr,
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png_const_charp warning_msg);
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};
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} // namespace imagelib
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} // namespace mozilla
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#endif // nsPNGDecoder_h__
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