Apr 2023

G-Golf version 0.8.0-a.4 is released.

This is the fourth release of the upcoming 0.8.0 release, now available for testing.

Here is a summary of the noteworthy changes since version 0.8.0-a.3. For a complete list and description of all changes, see the G-Golf git summary and git log.

New features

• Next-vfunc

  This release adds full support for a next-vfunc mechanism - which is to the GObject virtual method system what the next-method concept and mechanism is to the GOOPS (compute applicable) method system.

Examples

• Simple Paintable
  Animated Paintable

  New examples. Please note that these examples requires Guile-Cairo. They actually requires a patched version of guile-cairo that contains the following new interface (which is not in guile-cairo 1.11.2): cairo-pointer->context.

Bug fixing

• Missing <gobject> g-struct-fields

  At (load eval) time, the (g-golf defined) <gobject> class must be completed: retreive the class-struct and fill the <gobject> g-struct-fields slot - used by the vfunc mechanism.

Fev 2023

G-Golf version 0.8.0-a.3 is released.

This is the third release of the upcoming 0.8.0 release, now available for testing.

Here is a summary of the noteworthy changes since version 0.8.0-a.2. For a complete list and description of all changes, see the G-Golf git summary and git log.

Enhancement

• Skip Array Length Argument(s)

  This release implements skip array-length argument mechanism. This affects all functions and methods of any upstream (type)lib that accept one or more array argument(s), for which the function or method also expect an array length argument.

  Starting with this release, users don't have to pass those array length arg(s) (more accurately, users may not pass those arg(s) anymore), as G-Golf will supply those automatically. Note that this is also valid for arrays of uint8 - those arg(s) are 'array of chars', that users must provide as a string (as opposed to a list) - for example, see the peg-solitaire example, updated accordingly, so that the gtk-css-provider-load-from-data call does no longer provide the 'data' array length argument.

Examples

• All

  Updated, wrt the above enhancement, to call the g-application-run method 'without' the args length argument.

• Peg Solitaire

  In addition, updating the call to gtk-css-provider-load-from-data, removing the 'data' array length argument.

Bug fixing

• Callback and VFunc

  In G-Golf, both Callback and VFunc use one (identical) marshal procedure, g-golf-callback-closure-marshal, entirely written in scheme, which implements, in short, the foreign function interface (ffi) arg retrieval and transfornmation into their scheme representation, then call the callback of vfunc (user provided) scheme code, then sets the GI argument to the return value (if any).

  To obtain the ffi arg scheme representation values, G-Golf was calling gi-type-info-extract-ffi-return-value (a GI function, in the girffi module, not a G-Golf procedure) - but that function has some bug.

  G-Golf has now been updated so g-golf-callback-closure-marshal calls a 'self made' ffi-args->scm (see commit 6a30a12dd) for further details on this).

• Peg Solitaire

  The peg-solitaire example has been updated, as the Callback and VFunc bug fixed its snapshot-vfunc method. More specifically its width and height argument values are now correct, we no longer need to explicitly call get-intrinsic-width and get-intrinsic-height.

Jan 2023

G-Golf version 0.8.0-a.2 is released.

This is the second release of the upcoming 0.8.0 release, now available for testing.

Here is a summary of the noteworthy changes since version 0.8.0-a.1. For a complete list and description of all changes, see the G-Golf git summary and git log.

Dependencies

• GObject-Introspection-1.0 >= 1.72.0

  G-Golf uses GI girffi innterfaces, some only available since 1.72.0.

New interfaces

• allocate-c-struct

Examples

• Peg Solitaire

  The peg snapshots (which are what users drag while playing the game) now also have rounded corners. Before this improvment, they were being clipped by their <gtk-image> instance hosts, which use both a css border-radius style option and the overflow property, but users were dragging a squared rectangle snapshot.

• Drawing Widget

  New example, which demonstrates how implement a widget that does some custom drawing.

Performance

• ~15% improvment

  Note: by performance, until otherwise specified, we only refer to and measure how fast G-Golf imports the entire Gtk 4.0 typelib.

  After some changes made to the G-Golf main GI cache, importing Gtk-4.0 shows a ~15% improvement.

Bug fixing

• VFunc

  A VFunc specializer may also be a g-object class, as the newly added example demonstrates. Prior to this fix, a VFunc specializer was assumed to (always) be a g-interface class (as in the peg-solitaire example).

• GObject.TypeInstance

  GObject.TypeInstance fundamental class support fix. They must inherit <gtype-instance> and specify <gtype-class> as their metaclass.

Dec 2022

G-Golf version 0.8.0-a.1 is released.

This is the first release of the upcoming 0.8.0 release, now available for testing.