// $Id: jpgprgrs.cpp 1282 2006-06-09 09:46:49Z alex $ /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE ================================XARAHEADERSTART=========================== Xara LX, a vector drawing and manipulation program. Copyright (C) 1993-2006 Xara Group Ltd. Copyright on certain contributions may be held in joint with their respective authors. See AUTHORS file for details. LICENSE TO USE AND MODIFY SOFTWARE ---------------------------------- This file is part of Xara LX. Xara LX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. Xara LX and its component source files are distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ // #include "camtypes.h" //#include "filters.h" - in camtypes.h [AUTOMATICALLY REMOVED] #include "progress.h" #include "jinclude.h" #include "jpeglib.h" #include "jpgprgrs.h" // Place any IMPLEMENT type statements here //CC_IMPLEMENT_MEMDUMP(CCWobJob, CC_CLASS_MEMDUMP) // We want better memory tracking #define new CAM_DEBUG_NEW // Functions follow /******************************************************************************************** > JPEGProgressMonitor::JPEGProgressMonitor(j_decompress_ptr cinfo) Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Inputs: cinfo : the structure provided by the IJG library Purpose: Derived classes should call this prior to their own construction to construct a safe base class. Scope: protected ********************************************************************************************/ JPEGProgressMonitor::JPEGProgressMonitor(j_decompress_ptr cinfo) { // Set "base class" member... progress_monitor = Update; m_pcinfo = cinfo; m_bContinueOp = TRUE; } /******************************************************************************************** > JPEGProgressMonitor::~JPEGProgressMonitor() Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Purpose: Provides bizarre pure implementation for derived class destructors Scope: protected ********************************************************************************************/ JPEGProgressMonitor::~JPEGProgressMonitor() { } /******************************************************************************************** > void JPEGProgressMonitor::Update(j_common_ptr cinfo) Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Inputs: cinfo : data provided by the IJG Library Purpose: Callback function for the IJG library. It updates the Camelot Progress bar Scope: static Notes: This member is static because the IJG library is written in C, so requiring classless pointers to functions ********************************************************************************************/ void JPEGProgressMonitor::Update(j_common_ptr cinfo) { JPEGProgressMonitor* pThis = (JPEGProgressMonitor*) cinfo->progress; pThis->OnUpdate(); } /******************************************************************************************** > JPEGProgressBySelf::JPEGProgressBySelf(j_decompress_ptr cinfo, const StringBase& BarString) Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Inputs: BarString: a reference to the string to be used on the progress bar during the time-consuming operation Purpose: Constructor for a class providing a progress callback to the IJG Library JPEG filter. Notes: A progress bar will be constructed via this constructor. See Also: JPEGProgressByFilter ********************************************************************************************/ JPEGProgressBySelf::JPEGProgressBySelf(j_decompress_ptr cinfo, const StringBase& BarString) : JPEGProgressMonitor(cinfo) { m_BarString = BarString; m_uLastPercentDone = 0; // Create a new progress bar. Actually not that bothered if it doesn't construct m_pProgressBar = new Progress(&m_BarString, 100); } /******************************************************************************************** > JPEGProgressBySelf::~JPEGProgressBySelf() Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Purpose: Destructor - stops the progress bar Notes: Derived classes should call this subsequent to any specialized destruction code of their own. ********************************************************************************************/ JPEGProgressBySelf::~JPEGProgressBySelf() { // If started, then stop then progress bar if (m_pProgressBar != NULL) { delete m_pProgressBar; m_pProgressBar = NULL; } } /******************************************************************************************** > virtual void JPEGProgressBySelf::OnUpdate() Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Purpose: Called by JPEGProgressMonitor::Update() to provide feedback on the filter progress. Derived classes should provide an implementation for this. JPEGProgressBySelf calls the contained Progress::Update member with the percentage done. ********************************************************************************************/ void JPEGProgressBySelf::OnUpdate() { /* Fraction done = completed_passes + (pass_counter/pass_limit) -------------------------------------------- total_passes */ UINT32 PercentDone = (UINT32) (100L * completed_passes + (100L * pass_counter) / pass_limit) / total_passes; // Update the progress count, if required // but don't bother if the user aborted if (PercentDone != m_uLastPercentDone && m_bContinueOp) { m_bContinueOp = m_pProgressBar->Update(PercentDone); m_uLastPercentDone = PercentDone; } } /******************************************************************************************** > JPEGProgressByFilter::JPEGProgressByFilter(j_decompress_ptr cinfo, Filter* pFilterToUse, UINT32 Increment); Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Inputs: cinfo : the structure provided by the IJG library pFilterToUse : a pointer to a Filter with an IncProgressBarCount(UINT32 ...) member, which will be called with an update of the percentage progress made. ImportSize : the size of the file we are importing Purpose: Constructor for a class providing a progress callback to the IJG Library JPEG filter. Notes: No progress bar will be constructed via this constructor. The given filter is expected to provide one. See Also: JPEGProgressBySelf ********************************************************************************************/ JPEGProgressByFilter::JPEGProgressByFilter(j_decompress_ptr cinfo, Filter* pFilterToUse, UINT32 ImportSize) : JPEGProgressMonitor(cinfo) { m_pFilterForUpdate = pFilterToUse; m_uLastScanLineDone = 0; m_uImportSize = ImportSize; } /******************************************************************************************** > virtual void JPEGProgressByFilter::OnUpdate() Author: Colin_Barfoot (Xara Group Ltd) Created: 02/08/96 Purpose: Called by JPEGProgressMonitor::Update() to provide feedback on the filter progress. Derived classes should provide an implementation for this. JPEGProgressByFilter calls the contained Filter's Update member with the number of scanlines processed. ********************************************************************************************/ void JPEGProgressByFilter::OnUpdate() { INT32 Difference = m_pcinfo->output_scanline - m_uLastScanLineDone; if (Difference > 0) { UINT32 PerLineIncrement = m_uImportSize / m_pcinfo->output_height; m_pFilterForUpdate->IncProgressBarCount(Difference * PerLineIncrement); m_uLastScanLineDone += Difference; } }