ChangeLog.txt

Image32 - a 2D graphics library for Delphi Pascal
Latest version: 4.8
Released: 18 January 2024
Copyright © 2019-2025 Angus Johnson
Freeware released under Boost Software License
https://www.boost.org/LICENSE_1_0.txt

Documentation : https://www.angusj.com/image32/Docs/Overview.htm
Download      : https://github.com/AngusJohnson/Image32

Recent changes:

Version 4.8 
* This version contains further improvements in text rendering.
  CAUTION: Some function and method renaming too in Img32.Text.pas.
* Minor bug fixes too (issues #128..#130 in the GitHub repository).

Version 4.7 
* There have been significant improvements in SVG file reading
* There have also been significant improvements in managing text rendering.
  These include a new TChunkedText class and changes in the TFontManager class.
* Andreas Hausladen has continued to contribute changes that improve performance.
* Additional bug fixes (see issues #102..#125 in the GitHub repository).
Version 4.6 
* This release contains many bug fixes (see issues #10..#101) in the 
GitHub repository.
* Andreas Hausladen has also made multiple contributions to
the library that that have very significantly improved its performance.

Version 4.3 
  Numerous minor bugfixes
  
Version 4.11
  Fixed compatibility issues with older versions of Delphi.
  Updated Img32.Clipper to latest version of Clipper 

Version 4.1
Img32.Vector
  Fixed bug in Grow function (affecting line drawing)

Version 4.0
Img32.Layers
  This unit has had another major overhaul primarily to add layer 
    persistence (save layer objects in the file system).
  Added TLayer32.MakeRelative and TLayer32.MakeAbsolute methods
  Added TLayer32.OuterMargin property (accommodates shadow effects)
  Added TLayer32.OuterBounds property
  Added TLayer32.InnerRect property
  Renamed TLayer32.Bounds property to InnerBounds
Img32.Vector
  Significantly improved Grow algorithm
Img32.Text
  Renamed GetTextGlyphs to GetTextOutline
  Renamed TGlyphCache to TFontCache
Img32.Extra
  Added DrawShadowRect procedure
  Added TileImage procedure
Sample Applications
  Experimental CtrlDemo 
  Requires Delphi 2010 or newer


Version 3.4.1
  Img32.Extra
    Bugfix HatchBackground function -
      failed to redraw when the image wasn't clear
    DrawEdgePath renamed to DrawEdge (now overloaded)
  Img32.Layers
    Bugfix TLayer32 - 
      failed to hide layer when Visible set to false
    TLayeredImage32 
      default BackgroundColor changed to clBtnFace
      
Version 3.4 
  Img32.SVG.Core 
    Split into 2 units Img32.SVG.Core & Img32.SVG.Path
    Major class redesign to facilitate SVG editing
  Img32.SVG.PathDesign
    New unit to aid GUI editing of SVG paths
  Sample Applications
    New SVGPathDesign application
  Img32.Layers
    Minor bugfix to TLayer32.Move method
    
Version 3.3.03
  Img32.Panels
    Added TImage32Panel.CopyToImage method that accommodates repainting
      small rectangular regions (to significantly improve performance.)
    TImage32Panel's published property AllowScroll has been split into
      two published properties - AllowKeyScroll & AllowScrnScroll
      **Because of this Image32's runtime and designtime packages
      (Img32_Library.dpk & Img32_VCL_Dsgn.dpk) should be reinstalled.**
  Img32
    Minor bugfix in BlendToAlpha function.

Version 3.3
  Img32.Layers
    Minor bugfixes and performance tweaks
  Img32.Extra
    Added DrawEdge and DrawEdgePath functions
  Img32
    dpiAwareI & dpiAwareD renamed to dpiAware1 & dpiAwareOne
  Img32.SmoothPath
    This unit has been removed as it will be replaced later
    with another unit that will aid designing SVG Paths
  Updated Layers301 example again

Version 3.2.1
  Img32  
    Renamed TImage32.BlockUpdate to BlockNotify
    Renamed TImage32.UnblockUpdate to UnblockNotify
  Img32.Layers
    Fixed minor bugs preventing Delphi 7 compile
  Updated Layers301 example

Version 3.2
  Img32.Layers
    * This unit has again been rewritten where all layers 
    can now contain other layers (in a tree like structure 
    under TLayeredImage32's Root layer).
    * The TGroupLayer32 remains but is intended only as a
    fully transparent container for other layers rather than 
    being a fully or even partially opaque surface to other layers.
    * TLayer32 Bounds are now relative to their Parent such 
    that moving a layer will automatically move all contained 
    children.
    * The Layers301 sample application demonstrates new features.
  Img32.FMX
    The DpiAwareFMX function replaced by the DpiAware function
    
Version 3.1
  Img32
    renamed TRectD.Normalize to TRectD.NormalizeRect
      to emulate Delphi's TRectF method naming
  Img32.Vector
    renamed TSizeD's sx and sy fields to cx and cy respectively
      again to emulate Delphi's TSize field naming
    add RectsOverlap function
    add a UnionRect function that replaces the same function
      in Delphi's Types unit. (The function in the Types unit
      incorrectly unions empty rects which was causing problems)
  Img32.Extra
    fixed incorrect rotation angle in Draw3D function
  Img32.Layers
    added TLayer32.Move method
    changed TLayer32 Tag property to UserData property
    Added TGroupLayer32.ClipPath property
    Fixed drawing bug with deeply nested group layers
  Samples
    Added Layers301 to demonstrate clipped and nested group layers

Version 3.0
  The Library's unit structure has changed significantly.
  (Please see the accompanying install instructions and 
  the accompanying upgrade utility.)

Version 2.26
  Image32_SVG_Reader
    minor bugfixes
  Image32_Ttf
    Added TFontManager class 
    Added FontManager function

Version 2.25
  Image32_SVG
    New unit added 
      for simple loading of SVG images into TImage32
  Image32_SVG_Reader
    Fixed a significant bug (related to DecimalSeparator)
    Added text encoding detection
Version 2.24
  Image32_SVG_Reader
    New unit added
  Image32_SVG_Writer
    New unit added
  Image32_Vector
    DefaultMiterLimit changed to 4 (same as SVG specification)
    Removed deprecated esClosed from TEndStyle
      (use esPolygon instead)
    Improved RoundRect function    
  Image32_Transform
    Changed MatrixSkew parameters
  Image32Panels
    Renamed CenterImagePoint function to RecenterImageAt
  Image32_SmoothPath
    SmoothToBezier function moved to Image32_Extra
  Image32_Resamplers
    Added BoxDownSampling function
  Image32_Draw
    Added TGradientFillStyle parameter to
      TSvgRadialGradientRenderer.SetParameters
    Minor bugfix in gradient rendering
  Image32_Extra
    Modified Erase procedure
    Added EraseInverted procedure
    Replaced buggy BoxBlur function with
      new FastGaussianBlur function
  Examples
    Added SVG & SVG2 example apps.
  Numerous minor bugfixes
    
Version 2.23 :)
	
Version 2.22
  Image32_Resamplers
    Fixed minor bug in BilinearResampler
    Fixed minor transparency bug in BicubicResampler
  Image32_Transform
    Minor updates to SplineHorzTransform and 
      SplineVertTransform functions
  Image32Panels
	Minor update
  Image32
	RegisterResampler function parameters changed
	GetResamplerList procedure added
  Image32_Vector
    Added GetDistances and GetCumulativeDistances functions
	
Version 2.21
  Image32_Resamplers
    Fixed bug in BicubicResampler
  Image32_Transform
    Tidied up Spline transform algorithms

Version 2.20
  Image32_Resamplers
    New library unit added containing 3 resampler functions
      NearestResampler  - draft quality, fast
      BilinearResampler - high quality , average speed (default)
      BicubicResampler  - best quality , slow
  Image32
    DefaultResampler variable added
    RegisterResampler function added
    TImage32.AntiAliased property removed and replaced with a new 
      Resampler property (defaults to DefaultResampler)
  Image32_Layers
    TLayeredImage32.AntiAliased property removed and replaced
	  with a new Resampler property
    Fixed broken layer opacity and other minor bugs
    CreateRotatingButtonGroup parameters changed
  Image32_Transform
    Transform functions will now use the resampler associated 
	with  the image being transformed
  Image32_Ttf
    TGlyphCache.GetTextGlyphs function result changed
    TGlyphCache.GetAngledTextGlyphs function result changed
  Image32_Vector
    JoinPath procedure renamed AppendPath
  Image32Panels
    Implemented WM_MOUSEHWHEEL for horizontal scrolling

Version 2.19
  Image32_Layers
    Added AntiAliased property to TLayeredImage32
    Renamed TGroupLayer32.OnMerge property to OnBeforeMerge
    Added TGroupLayer32.OnAfterMerge property
    Added THitTestLayer32.ClearHitTesting method
    Minor tidy up.
  Image32_Transform
    Transforms can now have antialiasing disabled    
    Added AffineTransformImageRaw procedure
  Image32_Extra
    Added ResizeAndCenterImgForRotation procedure 
  Added Image32Panels
    which contains a TImage32 enhanced TPanel component
	
Version 2.18
  Image32_Layers
    Refactored and improved TRotateLayer32
    Improved TRotatingGroupLayer32
  Examples
    Updated Layers201 example app.
  Other minor tweaks.

Version 2.17
  Image32
    Significantly sped up TImage32.CopyToDc
  Image32_Layers
    Bugfix TLayeredImage32.BackgroundColor
  Image32_Ttf
	Changed TGlyphCache.GetTextGlyphs function
  Image32_Vector
	Minor bugfix in Grow function
  Other minor tweaks.
	
Version 2.16a
  Fixed broken SmoothPaths Demo.
  Otherwise, a few minor tweaks.
  
Version 2.16
  Image32
    TImage32.Antialias property is applied 
      more consistently with transforms
    TImage32.Skew parameters modified 
  Bugfixes related to rotation direction
  Significant code tidy.

Version 2.15
  Image32_Layers
	Further revisions
  Other minor updates
  
Version 2.14
  Image32_Layers
	Bugfix.
	
Version 2.13
  Image32_Layers
    Bugfix - invisible layers were 'clickable'
  Image32_SmoothPath
	Bugfix and significant code tidy
	
Version 2.12
  Image32
	Added ClockwiseRotationIsAnglePositive global variable.
	IMPORTANT: This variable defaults to true, which reverses
	the previous direction of rotation. The default direction
	now copies that of other Delphi graphics libraries.
  Image32_Extra
	Added SymmetricCropTransparent procedure
  VCL_Image32 Package
	Fixed broken link to deleted Image32_Text unit.

Version 2.11
  Image32_Layers
	Minor updates to TRasterLayer32 and TVectorLayer32
  Documentation
    A number of minor corrections.
	
Version 2.1
  Image32_Layers
	Bugfix to TLayeredImage32 - partial merging was broken
	Major updates to TRasterLayer32 and TVectorLayer32
  Image32_Vector
	Moved all Matrix functions to Image32_Transform
	Moved SmoothToBezier function to Image32_SmoothPath
	Moved RamerDouglasPeucker function to Image32_Extra
  Sample Applications
    Updated Layers101 and Layers201 
	
Version 2.02
  Minor updates to several Example applications.

Version 2.01
  Fixed a significant bug in Image32_Ttf.

Version 2.0
  This is a major update. There are many changes (mainly 
  to the Image32_Layers unit), and some of these changes 
  are very likely to break your existing code. Sorry.
  
  The Image32_Layers unit has been completely rewritten.
  The old unit was poorly written and cumbersome to use.
  The most significant change in the new layers unit is the 
  use of nested groups of layers that form a tree structure
  under TLayeredImage32.Root. This structure provides several
  advantages over the old flat layer structure. These include
  faster merges, and much simpler control over layer groups.
  Hit-testing has also been dramatically improved, being
  both much simpler to setup, and faster at detecting the 
  correct layer.
  
  The Image32_Text unit that was deprecated has been removed. 
  The Image32_Ttf unit provides all the functionality of the 
  old Image32_Text unit but, unlike its predecessor, supports 
  cross-platform development.
  
  Other units have had attention with minor bug fixes and 
  assorted embellishments, including a significant code tidy
  of the esoteric Image32_SmoothPath unit.

  The sample applications have also had significant revision.
  Some overly complicated apps have been removed, while others
  have been rewritten and simplified.

  The documentation has also been updated to address most if
  not all these changes.