fixed bugs in metadata saving

(cherry picked from commit 880b1d3d865a7820051cf3023cc58802daca28b0)

rtdata/languages/default

@@ -1644,7 +1644,7 @@ PARTIALPASTE_LENSPROFILE;Profiled lens correction
 PARTIALPASTE_LOCALCONTRAST;Local contrast
 PARTIALPASTE_LOCALLAB;Local Adjustments
 PARTIALPASTE_LOCALLABGROUP;Local Adjustments Settings
-PARTIALPASTE_LOCGROUP;Local 
+PARTIALPASTE_LOCGROUP;Local
 PARTIALPASTE_METADATA;Metadata mode
 PARTIALPASTE_METAGROUP;Metadata settings
 PARTIALPASTE_PCVIGNETTE;Vignette filter
@@ -1789,6 +1789,11 @@ PREFERENCES_MENUGROUPLABEL;Group "Color label"
 PREFERENCES_MENUGROUPPROFILEOPERATIONS;Group "Processing profile operations"
 PREFERENCES_MENUGROUPRANK;Group "Rank"
 PREFERENCES_MENUOPTIONS;Context Menu Options
+PREFERENCES_METADATA;Metadata
+PREFERENCES_METADATA_SYNC;Metadata synchronization with XMP sidecars
+PREFERENCES_METADATA_SYNC_NONE;Off
+PREFERENCES_METADATA_SYNC_READ;Read only
+PREFERENCES_METADATA_SYNC_READWRITE;Bidirectional
 PREFERENCES_MONINTENT;Default rendering intent
 PREFERENCES_MONITOR;Monitor
 PREFERENCES_MONPROFILE;Default color profile
@@ -1864,6 +1869,9 @@ PREFERENCES_TP_LABEL;Tool panel:
 PREFERENCES_TP_VSCROLLBAR;Hide vertical scrollbar
 PREFERENCES_USEBUNDLEDPROFILES;Use bundled profiles
 PREFERENCES_WORKFLOW;Layout
+PREFERENCES_XMP_SIDECAR_MODE;XMP sidecar style
+PREFERENCES_XMP_SIDECAR_MODE_STD;Standard (FILENAME.xmp for FILENAME.ext)
+PREFERENCES_XMP_SIDECAR_MODE_EXT;Darktable-like (FILENAME.ext.xmp for FILENAME.ext)
 PREFERENCES_ZOOMONSCROLL;Zoom images by scrolling
 PROFILEPANEL_COPYPPASTE;Parameters to copy
 PROFILEPANEL_GLOBALPROFILES;Bundled profiles
@@ -2057,7 +2065,7 @@ TP_COLORAPP_CHROMA_S;Saturation (S)
 TP_COLORAPP_CHROMA_S_TOOLTIP;Saturation in CIECAM02/16 corresponds to the color of a stimulus in relation to its own brightness, differs from L*a*b* and RGB saturation.
 TP_COLORAPP_CHROMA_TOOLTIP;Chroma in CIECAM02/16 corresponds to the color of a stimulus relative to the clarity of a stimulus that appears white under identical conditions, differs from L*a*b* and RGB chroma.
 TP_COLORAPP_CIECAT_DEGREE;CAT02/16 adaptation
-TP_COLORAPP_CONTRAST;Contrast (J) 
+TP_COLORAPP_CONTRAST;Contrast (J)
 TP_COLORAPP_CONTRAST_Q;Contrast (Q)
 TP_COLORAPP_CONTRAST_Q_TOOLTIP;Contrast (Q) in CIECAM02/16 is based on brightness, differs from L*a*b* and RGB contrast.
 TP_COLORAPP_CONTRAST_TOOLTIP;Contrast (J) in CIECAM02/16 is based on lightness, differs from L*a*b* and RGB contrast.
@@ -2104,7 +2112,7 @@ TP_COLORAPP_MOD16;CIECAM16
 TP_COLORAPP_NEUTRAL;Reset
 TP_COLORAPP_NEUTRAL_TIP;Reset all sliders checkbox and curves to their default values
 TP_COLORAPP_PRESETCAT02;Preset cat02/16 automatic - Symmetric mode
-TP_COLORAPP_PRESETCAT02_TIP;Set combobox, sliders, temp, green so that Cat02/16 automatic is preset.\nYou can change illuminant shooting conditions.\nYou must change Cat02/16 adaptation Viewing conditions if needed.\nYou can change Temperature and Tint Viewing conditions if needed, and other settings if needed.\nAll auto checkbox are disabled 
+TP_COLORAPP_PRESETCAT02_TIP;Set combobox, sliders, temp, green so that Cat02/16 automatic is preset.\nYou can change illuminant shooting conditions.\nYou must change Cat02/16 adaptation Viewing conditions if needed.\nYou can change Temperature and Tint Viewing conditions if needed, and other settings if needed.\nAll auto checkbox are disabled
 TP_COLORAPP_RSTPRO;Red & skin-tones protection
 TP_COLORAPP_RSTPRO_TOOLTIP;Red & skin-tones protection affects both sliders and curves.
 TP_COLORAPP_SOURCEF_TOOLTIP;Corresponds to the shooting conditions and how to bring the conditions and data back to a "normal" area. Normal" means average or standard conditions and data, i.e. without taking into account CIECAM corrections.
@@ -2522,13 +2530,13 @@ TP_LOCALLAB_BLURCOL;Radius
 TP_LOCALLAB_BLURCOLDE_TOOLTIP;The image used to calculate dE is blurred slightly to avoid taking isolated pixels into account.
 TP_LOCALLAB_BLURDE;Blur shape detection
 TP_LOCALLAB_BLURLC;Luminance only
-TP_LOCALLAB_BLURLEVELFRA;Blur levels 
+TP_LOCALLAB_BLURLEVELFRA;Blur levels
 TP_LOCALLAB_BLURMASK_TOOLTIP;Uses a large-radius blur to create a mask that allows you to vary the contrast of the image and/or darken/lighten parts of it.
 TP_LOCALLAB_BLURRESIDFRA;Blur Residual
 TP_LOCALLAB_BLURRMASK_TOOLTIP;Allows you to vary the "radius" of the Gaussian blur (0 to 1000)
 TP_LOCALLAB_BLUR_TOOLNAME;Blur/Grain & Denoise
 TP_LOCALLAB_BLWH;All changes forced in Black-and-White
-TP_LOCALLAB_BLWH_TOOLTIP;Force color  components "a" and "b" to zero.\nUseful for black and white processing, or film simulation. 
+TP_LOCALLAB_BLWH_TOOLTIP;Force color  components "a" and "b" to zero.\nUseful for black and white processing, or film simulation.
 TP_LOCALLAB_BUTTON_ADD;Add
 TP_LOCALLAB_BUTTON_DEL;Delete
 TP_LOCALLAB_BUTTON_DUPL;Duplicate
@@ -2553,11 +2561,11 @@ TP_LOCALLAB_CHROMASKCOL;Chroma
 TP_LOCALLAB_CHROMASK_TOOLTIP;Changes the chroma of the mask if one exists (i.e. C(C) or LC(H) is activated).
 TP_LOCALLAB_CHRRT;Chroma
 TP_LOCALLAB_CIEC;Use Ciecam environment parameters
-TP_LOCALLAB_CIECAMLOG_TOOLTIP;This module is based on the CIECAM color appearance model which was designed to better simulate how human vision perceives colors under different lighting conditions.\nThe first Ciecam process 'Scene conditions' is carried out by Log encoding, it also uses 'Absolute luminance' at the time of shooting.\nThe second Ciecam process  'Image adjustments' is simplified and uses only 3 variables (local contrast, contrast J, saturation s).\nThe third Ciecam process  'Viewing conditions' adapts the output to the intended viewing conditions (monitor, TV, projector, printer, etc.) so that the chromatic and contrast appearance is preserved across the display environment. 
+TP_LOCALLAB_CIECAMLOG_TOOLTIP;This module is based on the CIECAM color appearance model which was designed to better simulate how human vision perceives colors under different lighting conditions.\nThe first Ciecam process 'Scene conditions' is carried out by Log encoding, it also uses 'Absolute luminance' at the time of shooting.\nThe second Ciecam process  'Image adjustments' is simplified and uses only 3 variables (local contrast, contrast J, saturation s).\nThe third Ciecam process  'Viewing conditions' adapts the output to the intended viewing conditions (monitor, TV, projector, printer, etc.) so that the chromatic and contrast appearance is preserved across the display environment.
 TP_LOCALLAB_CIRCRADIUS;Spot size
 TP_LOCALLAB_CIRCRAD_TOOLTIP;Contains the references of the RT-spot, useful for shape detection (hue, luma, chroma, Sobel).\nLow values may be useful for processing foliage.\nHigh values may be useful for processing skin.
 TP_LOCALLAB_CLARICRES;Merge chroma
-TP_LOCALLAB_CLARIFRA;Clarity & Sharp mask/Blend & Soften Images 
+TP_LOCALLAB_CLARIFRA;Clarity & Sharp mask/Blend & Soften Images
 TP_LOCALLAB_CLARILRES;Merge luma
 TP_LOCALLAB_CLARISOFT;Soft radius
 TP_LOCALLAB_CLARISOFT_TOOLTIP;The ‘Soft radius’ slider (guided filter algorithm) reduces halos and irregularities for both Clarity and Sharp Mask and for all pyramid wavelet processes. To deactivate, set slider to zero.
@@ -2589,7 +2597,7 @@ TP_LOCALLAB_CONTRESID;Contrast
 TP_LOCALLAB_CONTTHMASK_TOOLTIP;Allows you to determine which parts of the image will be impacted based on the texture.
 TP_LOCALLAB_CONTTHR;Contrast Threshold
 TP_LOCALLAB_CONTWFRA;Local contrast
-TP_LOCALLAB_CSTHRESHOLD;Wavelet levels 
+TP_LOCALLAB_CSTHRESHOLD;Wavelet levels
 TP_LOCALLAB_CSTHRESHOLDBLUR;Wavelet level selection
 TP_LOCALLAB_CURV;Lightness - Contrast - Chrominance "Super"
 TP_LOCALLAB_CURVCURR;Normal
@@ -2613,19 +2621,19 @@ TP_LOCALLAB_DELTAD;Delta balance
 TP_LOCALLAB_DELTAEC;ΔE Image mask
 TP_LOCALLAB_DENOIBILAT_TOOLTIP;Allows you to reduce impulse or ‘salt & pepper’ noise.
 TP_LOCALLAB_DENOICHROC_TOOLTIP;Allows you to deal with blotches and packets of noise.
-TP_LOCALLAB_DENOICHRODET_TOOLTIP;Allows you to recover chrominance detail by progressively applying a Fourier transform (DCT). 
+TP_LOCALLAB_DENOICHRODET_TOOLTIP;Allows you to recover chrominance detail by progressively applying a Fourier transform (DCT).
 TP_LOCALLAB_DENOICHROF_TOOLTIP;Allows you to adjust fine-detail chrominance noise
 TP_LOCALLAB_DENOIEQUALCHRO_TOOLTIP;Allows you to direct the chroma noise reduction towards either the blue-yellow or red-green colors.
 TP_LOCALLAB_DENOIEQUAL_TOOLTIP;Allows you to carry out more or less noise reduction in either the shadows or the highlights.
 TP_LOCALLAB_DENOI1_EXP;Denoise based on luminance mask
 TP_LOCALLAB_DENOI2_EXP;Recovery based on luminance mask
-TP_LOCALLAB_DENOILUMDETAIL_TOOLTIP;Allows you to recover luminance detail by progressively applying a Fourier transform (DCT). 
+TP_LOCALLAB_DENOILUMDETAIL_TOOLTIP;Allows you to recover luminance detail by progressively applying a Fourier transform (DCT).
 TP_LOCALLAB_DENOIQUA_TOOLTIP;Conservative mode preserves low frequency detail. Aggressive mode removes low frequency detail.\nConservative and Aggressive modes use wavelets and DCT and can be used in conjunction with ‘Non-local Means – Luminance’.
 TP_LOCALLAB_DENOIS;Denoise
-TP_LOCALLAB_DENOITHR_TOOLTIP;Adjusts edge detection to help reduce noise in uniform, low-contrast areas. 
+TP_LOCALLAB_DENOITHR_TOOLTIP;Adjusts edge detection to help reduce noise in uniform, low-contrast areas.
 TP_LOCALLAB_DENOI_EXP;Denoise
 TP_LOCALLAB_DENOI_TOOLTIP;This module can be used for noise reduction either on its own (at the end of the processing pipeline) or in addition to the Noise Reduction module in the Detail tab (which works at the beginning of the pipeline).\n Scope allows you to differentiate the action  based on color (deltaE).
-TP_LOCALLAB_DEPTH;Depth 
+TP_LOCALLAB_DEPTH;Depth
 TP_LOCALLAB_DETAIL;Local contrast
 TP_LOCALLAB_DETAILFRA;Edge detection - DCT
 TP_LOCALLAB_DETAILSH;Details
@@ -2663,12 +2671,12 @@ TP_LOCALLAB_EXPCHROMA_TOOLTIP;Use in association with ‘Exposure compensation f
 TP_LOCALLAB_EXPCOLOR_TOOLTIP;Adjust color, lightness, contrast and correct small defects such as red-eye, sensor dust etc.
 TP_LOCALLAB_EXPCOMP;Exposure compensation ƒ
 TP_LOCALLAB_EXPCOMPINV;Exposure compensation
-TP_LOCALLAB_EXPCOMP_TOOLTIP;For portraits or images with a low color gradient. You can change ‘Shape detection’ in "Settings":\n\nIncrease 'ΔE scope threshold'\nReduce 'ΔE decay'\nIncrease 'ab-L balance (ΔE)’ 
+TP_LOCALLAB_EXPCOMP_TOOLTIP;For portraits or images with a low color gradient. You can change ‘Shape detection’ in "Settings":\n\nIncrease 'ΔE scope threshold'\nReduce 'ΔE decay'\nIncrease 'ab-L balance (ΔE)’
-TP_LOCALLAB_EXPCONTRASTPYR_TOOLTIP;See the documentation for Wavelet Levels.\nThere are some differences in the Locallab version: more tools and more possibilities for working on individual detail levels.\ne.g. Wavelet-level tone mapping. 
+TP_LOCALLAB_EXPCONTRASTPYR_TOOLTIP;See the documentation for Wavelet Levels.\nThere are some differences in the Locallab version: more tools and more possibilities for working on individual detail levels.\ne.g. Wavelet-level tone mapping.
 TP_LOCALLAB_EXPCONTRAST_TOOLTIP;Avoid spots that are too small ( < 32x32 pixels).\nUse low ‘Transition value’ and high ‘Transition decay’ and ‘Scope’ to simulate small RT-spots and deal with defects.\nUse 'Clarity and Sharp mask and Blend and Soften Images' if necessary by adjusting 'Soft radius' to reduce artifacts.
 TP_LOCALLAB_EXPCURV;Curves
 TP_LOCALLAB_EXPGRAD;Graduated Filter
-TP_LOCALLAB_EXPGRADCOL_TOOLTIP;A graduated filter is available in Color and Light (luminance, chrominance & hue gradients, and "Merge file")  Exposure (luminance grad.), Exposure Mask (luminance grad.), Shadows/Highlights (luminance grad.), Vibrance (luminance, chrominance & hue gradients), Local contrast & wavelet pyramid (local contrast grad.).\nFeather is located in Settings. 
+TP_LOCALLAB_EXPGRADCOL_TOOLTIP;A graduated filter is available in Color and Light (luminance, chrominance & hue gradients, and "Merge file")  Exposure (luminance grad.), Exposure Mask (luminance grad.), Shadows/Highlights (luminance grad.), Vibrance (luminance, chrominance & hue gradients), Local contrast & wavelet pyramid (local contrast grad.).\nFeather is located in Settings.
 TP_LOCALLAB_EXPLAPBAL_TOOLTIP;Changes the transformed/original image blend
 TP_LOCALLAB_EXPLAPGAMM_TOOLTIP;Changes the behaviour for images with too much or too little contrast by adding a gamma curve before and after the Laplace transform
 TP_LOCALLAB_EXPLAPLIN_TOOLTIP;Changes the behaviour for underexposed images by adding a linear component prior to applying the Laplace transform
@@ -2711,10 +2719,10 @@ TP_LOCALLAB_GRADANG;Gradient angle
 TP_LOCALLAB_GRADANG_TOOLTIP;Rotation angle in degrees : -180 0 +180
 TP_LOCALLAB_GRADFRA;Graduated Filter Mask
 TP_LOCALLAB_GRADGEN_TOOLTIP;Adjusts luminance gradient strength
-TP_LOCALLAB_GRADLOGFRA;Graduated Filter Luminance 
+TP_LOCALLAB_GRADLOGFRA;Graduated Filter Luminance
 TP_LOCALLAB_GRADSTR;Gradient strength
 TP_LOCALLAB_GRADSTRAB_TOOLTIP;Adjusts chroma gradient strength
-TP_LOCALLAB_GRADSTRCHRO;Chroma gradient strength 
+TP_LOCALLAB_GRADSTRCHRO;Chroma gradient strength
 TP_LOCALLAB_GRADSTRHUE;Hue gradient strength
 TP_LOCALLAB_GRADSTRHUE2;Hue gradient strength
 TP_LOCALLAB_GRADSTRHUE_TOOLTIP;Adjusts hue gradient strength
@@ -2758,7 +2766,7 @@ TP_LOCALLAB_LAPMASKCOL;Laplacian threshold
 TP_LOCALLAB_LAPRAD1_TOOLTIP;Increases the contrast of the mask by increasing the luminance values of the lighter areas. Can be used in conjunction with the L(L) and LC(H) curves.
 TP_LOCALLAB_LAPRAD2_TOOLTIP;Smooth radius uses a guided filter to decrease artifacts and smooth out the transition
 TP_LOCALLAB_LAPRAD_TOOLTIP;Smooth radius uses a guided filter to decrease artifacts and smooth out the transition
-TP_LOCALLAB_LAP_MASK_TOOLTIP;Solves PDEs for all Laplacian masks.\nIf enabled the Laplacian threshold mask reduces artifacts and smooths the result.\nIf disabled the response is linear. 
+TP_LOCALLAB_LAP_MASK_TOOLTIP;Solves PDEs for all Laplacian masks.\nIf enabled the Laplacian threshold mask reduces artifacts and smooths the result.\nIf disabled the response is linear.
 TP_LOCALLAB_LC_FFTW_TOOLTIP;FFT improves quality and allows the use of large radii, but increases processing time (depends on the area to be processed). Preferable to use only for large radii. The size of the area can be reduced by a few pixels to optimize the FFTW. This can reduce the processing time by a factor of 1.5 to 10.
 TP_LOCALLAB_LC_TOOLNAME;Local Contrast & Wavelets
 TP_LOCALLAB_LEVELBLUR;Maximum blur levels
@@ -2804,9 +2812,9 @@ TP_LOCALLAB_LOGFRA;Scene Conditions
 TP_LOCALLAB_LOGFRAME_TOOLTIP;Allows you to calculate and adjust the Ev levels and the 'Mean luminance Yb%' (source gray point) for the spot area. The resulting values will be used by all Lab operations and most RGB operations in the pipeline.\nTakes into account exposure compensation in the main-menu Exposure tab.\nAlso calculates the absolute luminance at the time of shooting.
 TP_LOCALLAB_LOGIMAGE_TOOLTIP;Takes into account corresponding Ciecam variables (mainly Contrast 'J' and Saturation 's', and also Contrast (Q) , Brightness (Q), Lightness (J), Colorfulness (M) in Advanced mode).
 TP_LOCALLAB_LOGLIGHTL;Lightness (J)
-TP_LOCALLAB_LOGLIGHTL_TOOLTIP;Close to lightness (L*a*b*), takes into account the increase in perceived coloration. 
+TP_LOCALLAB_LOGLIGHTL_TOOLTIP;Close to lightness (L*a*b*), takes into account the increase in perceived coloration.
 TP_LOCALLAB_LOGLIGHTQ;Brightness (Q)
-TP_LOCALLAB_LOGLIGHTQ_TOOLTIP;Perceived amount of light emanating from a stimulus.\nIndicator that a stimulus appears to be more or less bright, clear. 
+TP_LOCALLAB_LOGLIGHTQ_TOOLTIP;Perceived amount of light emanating from a stimulus.\nIndicator that a stimulus appears to be more or less bright, clear.
 TP_LOCALLAB_LOGLIN;Logarithm mode
 TP_LOCALLAB_LOGPFRA;Relative Exposure Levels
 TP_LOCALLAB_LOGREPART;Strength
@@ -2877,16 +2885,16 @@ TP_LOCALLAB_MASKLOWTHRESRETI_TOOLTIP;Dark-tone limit below which the Retinex (Lu
 TP_LOCALLAB_MASKLOWTHRESTM_TOOLTIP;Dark-tone limit below which the parameters will be restored progressively to their original values prior to being modified by the Tone Mapping settings.\n You can use certain tools in ‘Mask and modifications’ to change the gray levels: ‘Smooth radius’, Gamma and Slope, ‘Contrast curve’.\n Use a ‘lockable color picker’ on the mask to see which areas will be affected. Make sure you set ‘Background color mask’ = 0 in Settings.
 TP_LOCALLAB_MASKLOWTHRESVIB_TOOLTIP;Dark-tone limit below which the parameters will be restored progressively to their original values prior to being modified by the Vibrance and Warm Cool settings.\n You can use certain tools in ‘Mask and modifications’ to change the gray levels: ‘Smooth radius’, Gamma and Slope, ‘Contrast curve’.\n Use a ‘lockable color picker’ on the mask to see which areas will be affected. Make sure you set ‘Background color mask’ = 0 in Settings.
 TP_LOCALLAB_MASKLOWTHRESWAV_TOOLTIP;Dark-tone limit below which the parameters will be restored progressively to their original values prior to being modified by the Local contrast and Wavelet settings.\n You can use certain tools in ‘Mask and modifications’ to change the gray levels: ‘Smooth radius’, Gamma and Slope, ‘Contrast curve’.\n Use a ‘lockable color picker’ on the mask to see which areas will be affected. Make sure you set ‘Background color mask’ = 0 in Settings.
-TP_LOCALLAB_MASKLCTHRMID;Gray area luma denoise 
+TP_LOCALLAB_MASKLCTHRMID;Gray area luma denoise
-TP_LOCALLAB_MASKLCTHRMIDCH;Gray area chroma denoise 
+TP_LOCALLAB_MASKLCTHRMIDCH;Gray area chroma denoise
 TP_LOCALLAB_MASKUSABLE;Mask enabled (Mask & modifications)
 TP_LOCALLAB_MASKUNUSABLE;Mask disabled (Mask & modifications)
 TP_LOCALLAB_MASKRECOTHRES;Recovery threshold
-TP_LOCALLAB_MASK_TOOLTIP;You can enable multiple masks for a tool by activating another tool and using only the mask (set the tool sliders to 0 ).\n\nYou can also duplicate the RT-spot and place it close to the first spot. The small variations in the spot references allows you to make fine adjustments.  
+TP_LOCALLAB_MASK_TOOLTIP;You can enable multiple masks for a tool by activating another tool and using only the mask (set the tool sliders to 0 ).\n\nYou can also duplicate the RT-spot and place it close to the first spot. The small variations in the spot references allows you to make fine adjustments.
 TP_LOCALLAB_MED;Medium
 TP_LOCALLAB_MEDIAN;Median Low
 TP_LOCALLAB_MEDIANITER_TOOLTIP;The number of successive iterations carried out by the median filter.
-TP_LOCALLAB_MEDIAN_TOOLTIP;You can choose a median value in the range 3x3 to 9x9 pixels. Higher values increase noise reduction and blur. 
+TP_LOCALLAB_MEDIAN_TOOLTIP;You can choose a median value in the range 3x3 to 9x9 pixels. Higher values increase noise reduction and blur.
 TP_LOCALLAB_MEDNONE;None
 TP_LOCALLAB_MERCOL;Color
 TP_LOCALLAB_MERDCOL;Merge background (ΔE)
@@ -2935,7 +2943,7 @@ TP_LOCALLAB_MRFOU;Previous Spot
 TP_LOCALLAB_MRONE;None
 TP_LOCALLAB_MRTHR;Original Image
 TP_LOCALLAB_MRTWO;Short Curves 'L' Mask
-TP_LOCALLAB_MULTIPL_TOOLTIP;Wide-range tone adjustment: -18EV to +4EV. The first slider acts on very dark tones between -18EV and -6EV. The last slider acts on light tones up to 4EV  
+TP_LOCALLAB_MULTIPL_TOOLTIP;Wide-range tone adjustment: -18EV to +4EV. The first slider acts on very dark tones between -18EV and -6EV. The last slider acts on light tones up to 4EV
 TP_LOCALLAB_NEIGH;Radius
 TP_LOCALLAB_NLDENOISE_TOOLTIP;“Detail recovery” acts on a Laplacian transform to target uniform areas rather than areas with detail.
 TP_LOCALLAB_NLDENOISENLPAT_TOOLTIP;Use this slider to adapt the amount of denoise to the size of the objects to be processed.
@@ -3009,10 +3017,10 @@ TP_LOCALLAB_RETIM;Original Retinex
 TP_LOCALLAB_RETITOOLFRA;Retinex Tools
 TP_LOCALLAB_RETI_FFTW_TOOLTIP;FFT improve quality and allow big radius, but increases the treatment time.\nThe treatment time depends on the surface to be treated\nThe treatment time depends on the value of scale (be carefull to high values).\nTo be used preferably for large radius.\n\nDimensions can be reduced by a few pixels to optimize FFTW.\nThis optimization can reduce the treatment time by a factor of 1.5 to 10.\nOptimization not used in Preview
 TP_LOCALLAB_RETI_LIGHTDARK_TOOLTIP;Has no effect when the value of "Lightness = 1" or "Darkness =2".\nFor other values, the last step of a "Multiple scale Retinex" algorithm (similar to "local contrast") is applied. These 2 cursors, associated with "Strength" allow you to make adjustments upstream of local contrast
-TP_LOCALLAB_RETI_LIMDOFFS_TOOLTIP;Adjusts the internal parameters to optimize the response.\nPreferable to keep the "Restored data" values close to Min=0 and Max=32768 (log mode), but other values are possible.  
+TP_LOCALLAB_RETI_LIMDOFFS_TOOLTIP;Adjusts the internal parameters to optimize the response.\nPreferable to keep the "Restored data" values close to Min=0 and Max=32768 (log mode), but other values are possible.
 TP_LOCALLAB_RETI_LOGLIN_TOOLTIP;Logarithm mode introduces more contrast but will also generate more halos.
 TP_LOCALLAB_RETI_NEIGH_VART_TOOLTIP;The radius and variance sliders allow you adjust haze and target either the foreground or the background.
-TP_LOCALLAB_RETI_SCALE_TOOLTIP;If Scale=1, Retinex behaves like local contrast with additional possibilities.\nIncreasing the value of Scale increases the intensity of the recursive action at the expense of processing time. 
+TP_LOCALLAB_RETI_SCALE_TOOLTIP;If Scale=1, Retinex behaves like local contrast with additional possibilities.\nIncreasing the value of Scale increases the intensity of the recursive action at the expense of processing time.
 TP_LOCALLAB_RET_TOOLNAME;Dehaze & Retinex
 TP_LOCALLAB_REWEI;Reweighting iterates
 TP_LOCALLAB_RGB;RGB Tone Curve
@@ -3097,14 +3105,14 @@ TP_LOCALLAB_SOFTM;Soft Light
 TP_LOCALLAB_SOFTMETHOD_TOOLTIP;Apply a Soft-light blend (identical to the global adjustment). Carry out dodge and burn using the original Retinex algorithm.
 TP_LOCALLAB_SOFTRADIUSCOL;Soft radius
 TP_LOCALLAB_SOFTRADIUSCOL_TOOLTIP;Applies a guided filter to the output image to reduce possible artifacts.
-TP_LOCALLAB_SOFTRETI;Reduce ΔE artifacts 
+TP_LOCALLAB_SOFTRETI;Reduce ΔE artifacts
 TP_LOCALLAB_SOFTRETI_TOOLTIP;Take into account deltaE to improve Transmission map
 TP_LOCALLAB_SOFT_TOOLNAME;Soft Light & Original Retinex
 TP_LOCALLAB_SOURCE_ABS;Absolute luminance
 TP_LOCALLAB_SOURCE_GRAY;Mean luminance (Yb%)
 TP_LOCALLAB_SPECCASE;Specific cases
 TP_LOCALLAB_SPECIAL;Special use of RGB curves
-TP_LOCALLAB_SPECIAL_TOOLTIP;The checkbox allows you to remove all other actions i.e. ‘Scope’, masks, sliders etc., (except for transitions) and use just the effect of the RGB tone-curve. 
+TP_LOCALLAB_SPECIAL_TOOLTIP;The checkbox allows you to remove all other actions i.e. ‘Scope’, masks, sliders etc., (except for transitions) and use just the effect of the RGB tone-curve.
 TP_LOCALLAB_SPOTNAME;New Spot
 TP_LOCALLAB_STD;Standard
 TP_LOCALLAB_STR;Strength
@@ -3119,7 +3127,7 @@ TP_LOCALLAB_STRRETI_TOOLTIP;if Strength Retinex < 0.2 only Dehaze is enabled.\ni
 TP_LOCALLAB_STRUC;Structure
 TP_LOCALLAB_STRUCCOL;Spot structure
 TP_LOCALLAB_STRUCCOL1;Spot structure
-TP_LOCALLAB_STRUCT_TOOLTIP;Uses the Sobel algorithm to take into account structure for shape detection.\nActivate ‘Mask and modifications’ > ‘Show spot structure’ (Advanced mode) to see a preview of the mask (without modifications).\n\nCan be used in conjunction with the Structure Mask, Blur Mask and ‘Local contrast’ (by wavelet level) to improve edge detection.\n\nEffects of adjustments using Lightness, Contrast, Chrominance, Exposure or other non-mask-related tools visible using either ‘Show modified image’ or ‘Show modified areas with mask’. 
+TP_LOCALLAB_STRUCT_TOOLTIP;Uses the Sobel algorithm to take into account structure for shape detection.\nActivate ‘Mask and modifications’ > ‘Show spot structure’ (Advanced mode) to see a preview of the mask (without modifications).\n\nCan be used in conjunction with the Structure Mask, Blur Mask and ‘Local contrast’ (by wavelet level) to improve edge detection.\n\nEffects of adjustments using Lightness, Contrast, Chrominance, Exposure or other non-mask-related tools visible using either ‘Show modified image’ or ‘Show modified areas with mask’.
 TP_LOCALLAB_STRUMASKCOL;Structure mask strength
 TP_LOCALLAB_STRUMASK_TOOLTIP;Structure mask (slider) with the checkbox 'Structure mask as tool' unchecked: In this case a mask showing the structure will be generated even if none of the 3 curves is activated. Structure masks are available for mask (Blur and denoise") and mask(Color & Light).
 TP_LOCALLAB_STRUSTRMASK_TOOLTIP;Moderate use of this slider is recommended!
@@ -3129,7 +3137,7 @@ TP_LOCALLAB_SYM;Symmetrical (mouse)
 TP_LOCALLAB_SYMSL;Symmetrical (mouse + sliders)
 TP_LOCALLAB_TARGET_GRAY;Mean luminance (Yb%)
 TP_LOCALLAB_THRES;Threshold structure
-TP_LOCALLAB_THRESDELTAE;ΔE scope threshold 
+TP_LOCALLAB_THRESDELTAE;ΔE scope threshold
 TP_LOCALLAB_THRESRETI;Threshold
 TP_LOCALLAB_THRESWAV;Balance threshold
 TP_LOCALLAB_TLABEL;TM Min=%1 Max=%2 Mean=%3 Sig=%4
@@ -3154,7 +3162,7 @@ TP_LOCALLAB_TRANSITGRAD_TOOLTIP;Allows you to vary the y-axis transition
 TP_LOCALLAB_TRANSITVALUE;Transition value
 TP_LOCALLAB_TRANSITWEAK;Transition decay (linear-log)
 TP_LOCALLAB_TRANSITWEAK_TOOLTIP;Adjust transition decay function: 1 linear , 2 parabolic, 3 cubic up to ^25.\nCan be used in conjunction with very low transition values to reduce defects (CBDL, Wavelets, Color & Light)
-TP_LOCALLAB_TRANSIT_TOOLTIP;Adjust smoothness of transition between affected and unaffected areas as a percentage of the "radius" 
+TP_LOCALLAB_TRANSIT_TOOLTIP;Adjust smoothness of transition between affected and unaffected areas as a percentage of the "radius"
 TP_LOCALLAB_TRANSMISSIONGAIN;Transmission gain
 TP_LOCALLAB_TRANSMISSIONMAP;Transmission map
 TP_LOCALLAB_TRANSMISSION_TOOLTIP;Transmission according to transmission.\nAbscissa: transmission from negative values (min), mean, and positive values (max).\nOrdinate: amplification or reduction.\nYou can adjust this curve to change the Transmission and reduce artifacts
@@ -3186,13 +3194,13 @@ TP_LOCALLAB_WAT_SIGMALC_TOOLTIP;The effect of the local contrast adjustment is s
 TP_LOCALLAB_WAT_STRENGTHW_TOOLTIP;Intensity of edge-effect detection.
 TP_LOCALLAB_WAT_STRWAV_TOOLTIP;Allows the local contrast to be varied according to a chosen gradient and angle. The variation of the luminance signal is taken into account and not the luminance.
 TP_LOCALLAB_WAT_THRESHOLDWAV_TOOLTIP;Range of wavelet levels used throughout the ‘Wavelets’ module.
-TP_LOCALLAB_WAT_WAVBLURCURV_TOOLTIP;Allows you to blur each level of decomposition.\nThe finest to coarsest levels of decomposition are from left to right. 
+TP_LOCALLAB_WAT_WAVBLURCURV_TOOLTIP;Allows you to blur each level of decomposition.\nThe finest to coarsest levels of decomposition are from left to right.
 TP_LOCALLAB_WAT_WAVCBDL_TOOLTIP;Similar to Contrast By Detail Levels. Fine to coarse detail levels from left to right on the x-axis.
 TP_LOCALLAB_WAT_WAVDELTABAL_TOOLTIP;Acts on the balance of the three directions (horizontal, vertical and diagonal) based on the luminance of the image.\nBy default the shadows or highlights are reduced to avoid artifacts.
 TP_LOCALLAB_WAT_WAVESHOW_TOOLTIP;Shows all of the ‘Edge sharpness’ tools. It is advisable to read the Wavelet Levels documentation.
 TP_LOCALLAB_WAT_WAVLEVELBLUR_TOOLTIP;Allows you to adjust the maximum effect of blurring on the levels.
 TP_LOCALLAB_WAT_WAVSHAPE_TOOLTIP;Low to high local contrast from left to right on the x-axis\nIncrease or decrease local contrast on the y-axis.
-TP_LOCALLAB_WAT_WAVTM_TOOLTIP;The lower (negative) part compresses each level of decomposition creating a tone mapping effect.\nThe upper (positive) part attenuates the contrast by level.\nThe finest to coarsest levels of decomposition are from left to right on the x-axis. 
+TP_LOCALLAB_WAT_WAVTM_TOOLTIP;The lower (negative) part compresses each level of decomposition creating a tone mapping effect.\nThe upper (positive) part attenuates the contrast by level.\nThe finest to coarsest levels of decomposition are from left to right on the x-axis.
 TP_LOCALLAB_WAV;Local contrast
 TP_LOCALLAB_WAVBLUR_TOOLTIP;Allows you to blur each level of the decomposition, as well as the residual image.
 TP_LOCALLAB_WAVCOMP;Compression by level
@@ -3453,7 +3461,7 @@ TP_RETINEX_TLABEL;TM Datas Min=%1 Max=%2 Mean=%3 Sigma=%4
 TP_RETINEX_TLABEL2;TM Effective Tm=%1 TM=%2
 TP_RETINEX_TLABEL_TOOLTIP;ransmission map result.\nMin and Max are used by Variance.\nTm=Min TM=Max of Transmission Map.\nYou can normalize the results with the threshold slider.
 TP_RETINEX_TRANF;Transmission
-TP_RETINEX_TRANSMISSION;Transmission map 
+TP_RETINEX_TRANSMISSION;Transmission map
 TP_RETINEX_TRANSMISSION_TOOLTIP;Transmission according to transmission.\nAbscissa: transmission from negative values (min), mean, and positives values (max).\nOrdinate: amplification or reduction.
 TP_RETINEX_UNIFORM;Uniform
 TP_RETINEX_VARIANCE;Contrast
@@ -3777,11 +3785,11 @@ TP_WAVELET_STRENGTH;Strength
 TP_WAVELET_SUPE;Extra
 TP_WAVELET_THR;Shadows threshold
 TP_WAVELET_THRDEN_TOOLTIP;Generates a stepped curve used to guide the noise reduction as a function of local contrast. The denoise will be applied to uniform low local-contrast areas. Areas with detail (higher local contrast) will be preserved.
-TP_WAVELET_THREND;Local contrast threshold  
+TP_WAVELET_THREND;Local contrast threshold
 TP_WAVELET_THRESHOLD;Finer levels
 TP_WAVELET_THRESHOLD2;Coarser levels
 TP_WAVELET_THRESHOLD2_TOOLTIP;Only levels from the chosen value to the selected number of ‘wavelet levels’ will be affected by the Shadow luminance range.
-TP_WAVELET_THRESHOLD_TOOLTIP;Only levels below and including the chosen value will be affected by the Highlight luminance range. 
+TP_WAVELET_THRESHOLD_TOOLTIP;Only levels below and including the chosen value will be affected by the Highlight luminance range.
 TP_WAVELET_THRESWAV;Balance threshold
 TP_WAVELET_THRH;Highlights threshold
 TP_WAVELET_TILESBIG;Tiles
@@ -3863,7 +3871,7 @@ ZOOMPANEL_ZOOMFITCROPSCREEN;Fit crop to screen\nShortcut: <b>f</b>
 ZOOMPANEL_ZOOMFITSCREEN;Fit whole image to screen\nShortcut: <b>Alt</b>-<b>f</b>
 ZOOMPANEL_ZOOMIN;Zoom In\nShortcut: <b>+</b>
 ZOOMPANEL_ZOOMOUT;Zoom Out\nShortcut: <b>-</b>
-//TP_LOCALLAB_CIECAMLOG_TOOLTIP;This module is based on the CIECAM color appearance model which was designed to better simulate how human vision perceives colors under different lighting conditions.\nOnly the third Ciecam process (Viewing conditions - Target) is taken into account, as well as part of the second (contrast J, saturation s) , as well as some data from the first process (Scene conditions - Source) which is used for the Log encoding.\nIt also adapts the output to the intended viewing conditions (monitor, TV, projector, printer, etc.) so that the chromatic and contrast appearance is preserved across the display environment. 
+//TP_LOCALLAB_CIECAMLOG_TOOLTIP;This module is based on the CIECAM color appearance model which was designed to better simulate how human vision perceives colors under different lighting conditions.\nOnly the third Ciecam process (Viewing conditions - Target) is taken into account, as well as part of the second (contrast J, saturation s) , as well as some data from the first process (Scene conditions - Source) which is used for the Log encoding.\nIt also adapts the output to the intended viewing conditions (monitor, TV, projector, printer, etc.) so that the chromatic and contrast appearance is preserved across the display environment.
 //TP_WAVELET_DENH;Low levels (1234)- Finest details
 //TP_WAVELET_DENL;High levels - Coarsest details
 //TP_WAVELET_DENLH;Guided threshold for detail levels 1-4

rtengine/init.cc

@@ -33,6 +33,7 @@
 #include "profilestore.h"
 #include "../rtgui/threadutils.h"
 #include "rtlensfun.h"
+#include "metadata.h"
 #include "procparams.h"
 
 namespace rtengine
@@ -103,6 +104,8 @@ int init (const Settings* s, const Glib::ustring& baseDir, const Glib::ustring&
 }
 
     Color::init ();
+    Exiv2Metadata::init();
+
     delete lcmsMutex;
     lcmsMutex = new MyMutex;
     fftwMutex = new MyMutex;
@@ -111,6 +114,7 @@ int init (const Settings* s, const Glib::ustring& baseDir, const Glib::ustring&
 
 void cleanup ()
 {
+    Exiv2Metadata::cleanup();
     ProcParams::cleanup ();
     Color::cleanup ();
     RawImageSource::cleanup ();

rtengine/metadata.cc

@@ -20,6 +20,8 @@
 
 #include <stdio.h>
 #include <glib/gstdio.h>
+#include <iostream>
+
 #include "metadata.h"
 #include "settings.h"
 #include "../rtgui/version.h"
@@ -65,7 +67,7 @@ Exiv2Metadata::Exiv2Metadata():
 
 
 Exiv2Metadata::Exiv2Metadata(const Glib::ustring &path):
-    src_(""),
+    src_(path),
     merge_xmp_(settings->metadata_xmp_sync != Settings::MetadataXmpSync::NONE),
     image_(nullptr),
     exif_(new rtengine::procparams::ExifPairs),
@@ -154,20 +156,27 @@ void Exiv2Metadata::setIptc(const rtengine::procparams::IPTCPairs &iptc)
 
 void Exiv2Metadata::do_merge_xmp(Exiv2::Image *dst) const
 {
-    auto xmp = getXmpSidecar(src_);
+    try { 
-    Exiv2::ExifData exif;
+        auto xmp = getXmpSidecar(src_);
-    Exiv2::IptcData iptc;
+        Exiv2::ExifData exif;
-    Exiv2::moveXmpToExif(xmp, exif);
+        Exiv2::IptcData iptc;
-    Exiv2::moveXmpToIptc(xmp, iptc);
+        Exiv2::moveXmpToIptc(xmp, iptc);
+        Exiv2::moveXmpToExif(xmp, exif);
 
-    for (auto &datum : exif) {
+        for (auto &datum : exif) {
-        dst->exifData()[datum.key()] = datum;
+            dst->exifData()[datum.key()] = datum;
-    }
+        }
-    for (auto &datum : iptc) {
+        for (auto &datum : iptc) {
-        dst->iptcData()[datum.key()] = datum;
+            dst->iptcData()[datum.key()] = datum;
-    }
+        }
-    for (auto &datum : xmp) {
+        for (auto &datum : xmp) {
-        dst->xmpData()[datum.key()] = datum;
+            dst->xmpData()[datum.key()] = datum;
+        }
+    } catch (Exiv2::AnyError &exc) {
+        if (settings->verbose) {
+            std::cerr << "Error loading metadata from XMP sidecar: "
+                      << exc.what() << std::endl;
+        }
     }
 }
 
@@ -288,4 +297,16 @@ Exiv2::XmpData Exiv2Metadata::getXmpSidecar(const Glib::ustring &path)
     return ret;
 }
 
+
+void Exiv2Metadata::init()
+{
+    Exiv2::XmpParser::initialize();
+}
+
+
+void Exiv2Metadata::cleanup()
+{
+    Exiv2::XmpParser::terminate();
+}
+
 } // namespace rtengine

rtengine/metadata.h

@@ -56,6 +56,9 @@ public:
 
     static Glib::ustring xmpSidecarPath(const Glib::ustring& path);
     static Exiv2::XmpData getXmpSidecar(const Glib::ustring& path);
+
+    static void init();
+    static void cleanup();
    
 private:
     void do_merge_xmp(Exiv2::Image* dst) const;