Support for XISF
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// ____ ______ __
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// / __ \ / ____// /
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// / /_/ // / / /
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// / ____// /___ / /___ PixInsight Class Library
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// /_/ \____//_____/ PCL 2.4.23
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// ----------------------------------------------------------------------------
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// pcl/UIScaling.h - Released 2022-03-12T18:59:29Z
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// ----------------------------------------------------------------------------
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// This file is part of the PixInsight Class Library (PCL).
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// PCL is a multiplatform C++ framework for development of PixInsight modules.
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//
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// Copyright (c) 2003-2022 Pleiades Astrophoto S.L. All Rights Reserved.
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//
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// Redistribution and use in both source and binary forms, with or without
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// modification, is permitted provided that the following conditions are met:
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//
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// 1. All redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 2. All redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the names "PixInsight" and "Pleiades Astrophoto", nor the names
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// of their contributors, may be used to endorse or promote products derived
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// from this software without specific prior written permission. For written
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// permission, please contact info@pixinsight.com.
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//
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// 4. All products derived from this software, in any form whatsoever, must
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// reproduce the following acknowledgment in the end-user documentation
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// and/or other materials provided with the product:
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//
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// "This product is based on software from the PixInsight project, developed
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// by Pleiades Astrophoto and its contributors (https://pixinsight.com/)."
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//
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// Alternatively, if that is where third-party acknowledgments normally
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// appear, this acknowledgment must be reproduced in the product itself.
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//
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// THIS SOFTWARE IS PROVIDED BY PLEIADES ASTROPHOTO AND ITS CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL PLEIADES ASTROPHOTO OR ITS
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, BUSINESS
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// INTERRUPTION; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; AND LOSS OF USE,
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// DATA OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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// ----------------------------------------------------------------------------
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#ifndef __PCL_UIScaling_h
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#define __PCL_UIScaling_h
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/// \file pcl/UIScaling.h
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#include <pcl/Defs.h>
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#include <pcl/Diagnostics.h>
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#include <pcl/GlobalSettings.h>
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#include <pcl/Math.h>
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#include <pcl/String.h>
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namespace pcl
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{
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// ----------------------------------------------------------------------------
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/*!
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* \defgroup ui_scaling_functions User Interface Scaling Functions
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*/
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#define PCL_UIScaling_LUT_Length 7
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extern PCL_DATA const double PCL_UIScalingFactor_LUT[ PCL_UIScaling_LUT_Length ];
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extern PCL_DATA const char* PCL_UIScalingSubdir_LUT[ PCL_UIScaling_LUT_Length ];
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/*!
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* Returns the resource scaling index corresponding to the specified resource
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* scaling factor.
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*
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* Resource scaling indexes pertain to the set {0,1,2,3,4,5,6}, respectively
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* for the resource scaling factors {1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0}.
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*
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* \ingroup ui_scaling_functions
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*/
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inline int UIResourceScalingIndex( double scalingFactor )
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{
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if ( scalingFactor > 1 )
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{
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int index = Min( RoundInt( 2*scalingFactor ), PCL_UIScaling_LUT_Length+1 );
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if ( index > 2 )
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return index-2;
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}
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return 0;
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}
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/*!
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* Returns the resource scaling factor corresponding to the specified display
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* scaling factor.
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*
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* A display scaling factor is the ratio of physical device pixels to
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* device-independent logical pixel units for a particular control or resource.
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* A resource scaling factor has the same definition, but is constrained to the
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* finite set {1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0}.
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*
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* On the PixInsight platform, the reference display density is 109 dpi,
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* corresponding to a 27-inch monitor at QHD resolution (2560x1440 physical
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* display pixels). This density corresponds to a display/resource scaling
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* factor of 1.0.
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*
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* \ingroup ui_scaling_functions
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*/
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inline double UIResourceScalingFactor( double scalingFactor )
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{
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return PCL_UIScalingFactor_LUT[UIResourceScalingIndex( scalingFactor )];
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}
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/*!
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* Returns the resource scaling factor corresponding to the specified resource
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* scaling index.
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*
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* Resource scaling indexes pertain to the set {0,1,2,3,4,5,6}, respectively
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* for the resource scaling factors {1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0}.
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*
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* On the PixInsight platform, the reference display density is 109 dpi,
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* corresponding to a 27-inch monitor at QHD resolution (2560x1440 physical
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* display pixels). This density corresponds to a display/resource scaling
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* factor of 1.0 and a zero resource scaling index.
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*
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* \ingroup ui_scaling_functions
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*/
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inline double UIResourceScalingFactorForIndex( int index )
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{
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return PCL_UIScalingFactor_LUT[Range( index, 0, PCL_UIScaling_LUT_Length-1 )];
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}
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/*!
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* Applies the specified scaling factor to convert \a size from
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* device-independent logical pixel units to physical device pixels. The
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* returned value is always rounded to the nearest integer.
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*
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* \ingroup ui_scaling_functions
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*/
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inline int UIScaled( double scalingFactor, int size )
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{
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return (scalingFactor <= 1) ? size : RoundInt( scalingFactor*size );
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}
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/*!
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* Applies the specified scaling factor to convert \a size from physical device
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* pixels to device-independent logical pixel units. The returned value is
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* always rounded to the nearest integer.
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*
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* \ingroup ui_scaling_functions
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*/
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inline int UIUnscaled( double scalingFactor, int size )
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{
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return (scalingFactor <= 1) ? size : RoundInt( size/scalingFactor );
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}
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/*!
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* Returns a user interface resource path corresponding to the specified
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* \a resource path scaled for the specified resource scaling \a index.
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*
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* For example, if this function is called as follows:
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*
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* \code UIScaledResourceForIndex( 3, "/:icons/delete.png" ); \endcode
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*
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* the returned string will be "/:icons/2.5/delete.png" for a resource scaling
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* factor of 2.5.
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*
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* \ingroup ui_scaling_functions
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*/
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template <class R>
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inline String UIScaledResourceForIndex( int index, R resource )
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{
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String path( resource );
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index = Range( index, 0, PCL_UIScaling_LUT_Length-1 );
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if ( index > 0 )
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{
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size_type p = path.FindLast( '/' );
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if ( p != String::notFound && p > 0 ) // assume resource starts with ":/"
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return path.Left( p+1 ) + PCL_UIScalingSubdir_LUT[index] + path.Substring( p );
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}
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return path;
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}
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/*!
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* Returns a user interface resource path corresponding to the specified
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* \a resource path scaled for the specified resource scaling factor.
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*
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* For example, if this function is called as follows:
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*
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* \code UIScaledResourceForIndex( 1.47, "/:icons/pencil.png" ); \endcode
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*
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* the returned string will be "/:icons/1.5/pencil.png" for a resource scaling
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* factor of 1.5.
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*
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* \ingroup ui_scaling_functions
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*/
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template <class R>
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inline String UIScaledResource( double scalingFactor, R resource )
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{
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return UIScaledResourceForIndex( UIResourceScalingIndex( scalingFactor ), resource );
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}
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/*
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* Auxiliary structure used by UIScaledStyleSheet().
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*/
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struct PCL_UIStringSection
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{
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size_type pos = 0;
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size_type len = 0;
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PCL_UIStringSection( size_type i, size_type j )
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: pos( i )
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, len( j - i )
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{
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}
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PCL_UIStringSection() = default;
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PCL_UIStringSection( const PCL_UIStringSection& ) = default;
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};
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/*!
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* Returns a CSS source code string transformed with scaled dimensions in
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* pixels and scaled resource file paths, and optionally font sizes in points
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* converted to scaled pixels.
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*
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* \param displayScalingFactor The display scaling factor that will be
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* applied to scale pixel dimensions and
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* (optionally) font sizes.
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*
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* \param resourceScalingFactor The resource scaling factor that will be
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* applied to select bitmap resources.
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*
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* \param styleSheet A string containing valid input CSS source
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* code. The function will return a transformed
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* version of this string.
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*
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* \param fontDPI If greater than zero, this is the font
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* resolution, in dots per inch (dpi), for
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* transformation of point sizes to scaled pixel
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* sizes. If this parameter is zero (the default
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* value), this routine will use the font
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* resolution currently selected in core user
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* preferences (which is the value of the
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* "Application/FontResolution" global integer
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* variable; see PixInsightSettings). If this
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* parameter is a negative integer, no
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* point-to-pixel conversions will be applied.
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*
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* See Control::ScaledStyleSheet() for a detailed example.
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*
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* \ingroup ui_scaling_functions
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*/
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template <class S>
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String UIScaledStyleSheet( double displayScalingFactor, double resourceScalingFactor, S styleSheet, int fontDPI = 0 )
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{
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#define PCL_UI_IS_NUMBER_DIGIT( c ) (CharTraits::IsDigit( c ) || CharTraits::IsDecimalSeparator( c ))
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String cssCode( styleSheet );
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/*
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* Scale resource file paths.
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*/
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if ( resourceScalingFactor > 0 )
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{
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Array<PCL_UIStringSection> urlSections;
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for ( size_type p = 0; ; )
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{
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p = cssCode.Find( ":/", p );
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if ( p == String::notFound )
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break;
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size_type q = cssCode.Find( ')', p+2 );
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if ( q != String::notFound )
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{
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urlSections.Add( PCL_UIStringSection( p, q ) );
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p = q+1;
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}
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else
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p += 2;
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}
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if ( !urlSections.IsEmpty() )
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{
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int index = UIResourceScalingIndex( resourceScalingFactor );
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for ( const PCL_UIStringSection& s : ReverseIterable( urlSections ) )
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cssCode.Replace( s.pos, s.len, String( UIScaledResourceForIndex( index, cssCode.Substring( s.pos, s.len ) ) ) );
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}
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}
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/*
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* Scale pixel dimensions and convert points to scaled pixels.
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*/
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if ( displayScalingFactor > 0 )
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{
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Array<PCL_UIStringSection> pxSections;
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for ( size_type q = 0; ; q += 2 )
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{
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q = cssCode.Find( "px", q );
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if ( q == String::notFound )
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break;
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size_type p = q;
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while ( p > 0 && PCL_UI_IS_NUMBER_DIGIT( cssCode[p-1] ) )
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--p;
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if ( p < q )
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pxSections.Add( PCL_UIStringSection( p, q ) );
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}
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for ( const PCL_UIStringSection& s : ReverseIterable( pxSections ) )
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{
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double px;
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if ( cssCode.Substring( s.pos, s.len ).TryToDouble( px ) )
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cssCode.Replace( s.pos, s.len, String().Format( "%d", RoundInt( px * displayScalingFactor ) ) );
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}
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/*
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* If fontDPI=0 (the default value), use core font resolution settings for
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* point-to-pixel conversions.
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*/
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if ( fontDPI == 0 )
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fontDPI = PixInsightSettings::GlobalInteger( "Application/FontResolution" );
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/*
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* If a valid font resolution is available, convert points to scaled pixels.
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*/
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if ( fontDPI > 0 )
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{
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Array<PCL_UIStringSection> ptSections;
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for ( size_type q = 0; ; q += 2 )
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{
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q = cssCode.Find( "pt", q );
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if ( q == String::notFound )
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break;
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size_type p = q;
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while ( p > 0 && PCL_UI_IS_NUMBER_DIGIT( cssCode[p-1] ) )
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--p;
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if ( p < q )
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ptSections.Add( PCL_UIStringSection( p, q ) );
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}
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for ( const PCL_UIStringSection& s : ReverseIterable( ptSections ) )
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{
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double pt;
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if ( cssCode.Substring( s.pos, s.len ).TryToDouble( pt ) )
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cssCode.Replace( s.pos, s.len+2, String().Format( "%dpx", RoundInt( displayScalingFactor*pt*fontDPI/72 ) ) );
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}
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}
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}
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return cssCode;
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#undef PCL_UI_IS_NUMBER_DIGIT
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}
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// ----------------------------------------------------------------------------
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} // pcl
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#endif // __PCL_UIScaling_h
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// ----------------------------------------------------------------------------
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// EOF pcl/UIScaling.h - Released 2022-03-12T18:59:29Z
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