Changes in GTK 4.5.0

GSK

• Drop the GL renderer in favor of NGL
  
• Rename NGL to GL
  
• Fix some coordinate overflow issues
  
• Reimplement texture upload and download for better support of image formats and color spaces
  
• New API:
  
  • gsk_transform_skew
    
  • gsk_transform_to_2d_components
    

GDK

• Support HSL in gdk_rgba_parse
  
• Use libpng, libjpeg and libtiff directly when loading textures, and support more image formats (including 16bit and float formats)
  
• New API:
  
  • gdk_texture_new_from_bytes
    
  • gdk_texture_new_from_filename
    
  • gdk_texture_download_float
    
  • gdk_texture_save_to_png_bytes
    
  • gdk_texture_save_to_tiff
    
  • gdk_texture_save_to_tiff_bytes
    
  • gdk_display_create_gl_context
    
• Implement GIcon and GLoadableIcon in GdkTexture
  
• Move EGL initialization to the frontend
  
• Use configless EGL contexts, if supported
  
• Use >8bit pixel formats, if supported and requested
  

CSS

• Add support for line-height
  
• Add support for text-transform
  

Theme

• Fixes for buttons in toolbars
  

Input

• Update compose sequences from libX11 1.7.2
  
• Accept replacement string longer than 20 characters
  

Text

• Implement sloped caret drawing
  
• Add a gtk-hint-font-metrics setting to switch font rendering to be more similar to GTK3
  

GtkTextView

• Add support for line height
  
• Add support for text transforms
  
• Misc fixes for CSS -> pango attribute translations
  
• Invalidate pango contexts when font settings change
  
• Improve undo grouping when overwriting
  

GtkListView

• Make tree indentation more flexible with GtkTreeExpander:indent-for-icon
  

GtkMenuButton

• Support custom children
  

GtkFlowBox

• Add prepend and append
  

GtkCalendar

• Fix handling of weeks starting on Monday
  

GtkWindow

• Add a titlebar property
  

GtkDropDown

• Add a show-arrow property
  

GtkPopoverMenu

• Support a use-markup attribute in menu models
  

New classes

• Add GtkSymbolicPaintable
  

Tools

• Support DND in gtk4-node-editor and the inspector's recorder
  

Demos

• Improve the font rendering demo
  

Build

• Require Pango 1.49
  
• Require libpng, libtiff and libjpeg
  
• Speed up handling of resources during build
  

X11

• Support touchpad gestures with XInput 2.4
  

Windows

• Fix DND coordinates
  

Translation updates

Basque, Brazilian Portuguese, Catalan, Chinese (China), Croatian, Czech, Dutch, Finnish, French, Galician, German, Hebrew, Hungarian, Icelandic, Indonesian, Kazakh, Korean, Latvian, Lithuanian, Persian, Portuguese, Romanian, Serbian, Slovak, Spanish, Swedish, Turkish, Ukrainian.