169 lines
4.5 KiB
C++
169 lines
4.5 KiB
C++
/*
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* @file llimagepng.cpp
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* @brief LLImageFormatted glue to encode / decode PNG files.
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*
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* $LicenseInfo:firstyear=2007&license=viewergpl$
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*
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* Copyright (c) 2007-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#include "linden_common.h"
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#include "stdtypes.h"
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#include "llerror.h"
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#include "llimage.h"
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#include "llpngwrapper.h"
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#include "llimagepng.h"
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// ---------------------------------------------------------------------------
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// LLImagePNG
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// ---------------------------------------------------------------------------
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LLImagePNG::LLImagePNG()
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: LLImageFormatted(IMG_CODEC_PNG)
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{
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}
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LLImagePNG::~LLImagePNG()
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{
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}
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// Virtual
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// Parse PNG image information and set the appropriate
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// width, height and component (channel) information.
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BOOL LLImagePNG::updateData()
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{
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resetLastError();
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// Check to make sure that this instance has been initialized with data
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if (!getData() || (0 == getDataSize()))
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{
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setLastError("Uninitialized instance of LLImagePNG");
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return FALSE;
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}
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// Decode the PNG data and extract sizing information
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LLPngWrapper pngWrapper;
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LLPngWrapper::ImageInfo infop;
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if (! pngWrapper.readPng(getData(), NULL, &infop))
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{
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setLastError(pngWrapper.getErrorMessage());
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return FALSE;
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}
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setSize(infop.mWidth, infop.mHeight, infop.mComponents);
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return TRUE;
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}
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// Virtual
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// Decode an in-memory PNG image into the raw RGB or RGBA format
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// used within SecondLife.
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BOOL LLImagePNG::decode(LLImageRaw* raw_image, F32 decode_time)
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{
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llassert_always(raw_image);
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resetLastError();
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// Check to make sure that this instance has been initialized with data
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if (!getData() || (0 == getDataSize()))
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{
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setLastError("LLImagePNG trying to decode an image with no data!");
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return FALSE;
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}
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// Decode the PNG data into the raw image
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LLPngWrapper pngWrapper;
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if (! pngWrapper.readPng(getData(), raw_image))
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{
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setLastError(pngWrapper.getErrorMessage());
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return FALSE;
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}
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return TRUE;
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}
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// Virtual
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// Encode the in memory RGB image into PNG format.
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BOOL LLImagePNG::encode(const LLImageRaw* raw_image, F32 encode_time)
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{
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llassert_always(raw_image);
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resetLastError();
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// Image logical size
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setSize(raw_image->getWidth(), raw_image->getHeight(), raw_image->getComponents());
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U32 bufferSize = getWidth() * getHeight() * getComponents() + 1024;
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//New implementation
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allocateData(bufferSize); //Set to largest possible size.
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if(isBufferInvalid()) //Checking
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{
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setLastError("LLImagePNG::encode failed allocateData");
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return FALSE;
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}
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// Delegate actual encoding work to wrapper
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LLPngWrapper pngWrapper;
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if (! pngWrapper.writePng(raw_image, getData()))
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{
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setLastError(pngWrapper.getErrorMessage());
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deleteData();
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return FALSE;
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}
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// Resize internal buffer.
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if(!reallocateData(pngWrapper.getFinalSize())) //Shrink. Returns NULL on failure.
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{
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setLastError("LLImagePNG::encode failed reallocateData");
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deleteData();
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return FALSE;
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}
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return TRUE;
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/*U8* mTmpWriteBuffer = new U8[ bufferSize ];
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// Delegate actual encoding work to wrapper
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LLPngWrapper pngWrapper;
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if (! pngWrapper.writePng(raw_image, mTmpWriteBuffer))
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{
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setLastError(pngWrapper.getErrorMessage());
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delete[] mTmpWriteBuffer;
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return FALSE;
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}
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// Resize internal buffer and copy from temp
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U32 encodedSize = pngWrapper.getFinalSize();
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allocateData(encodedSize);
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memcpy(getData(), mTmpWriteBuffer, encodedSize);
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delete[] mTmpWriteBuffer;
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return TRUE;*/
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}
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