GTK3 speedbuttons display bad images

Lazarus/FPC Version: lazarus_main
Operating System: Linux
CPU / Bitness: 64 (64 or 32 Bit?)

What happens

In gtk3, speedbuttons do not show their bitmaps correctly.

What did you expect

Correctly rendered bitmaps.

Steps to reproduce

Blank form, add a speedbutton, set a bitmap file and run it.

The issue was introduced in 02115d37, "LCL-GTK3: Turn WriteLn into DebugLn. Make sure they compile. Cleanup." and relates to gtk3lclintf.inc. Changes in 02115d37 enabled some extra formats but they appear to be in a different order than that defined in the bindings, gtk3bindings/lazcairo1.pas.

Around line 306 the function TGtk3WidgetSet.RawImage_DescriptionFromBitmap() should look like this -

function TGtk3WidgetSet.RawImage_DescriptionFromBitmap(ABitmap: HBITMAP; out ADesc: TRawImageDescription): boolean;
// var
//  GDIObject: PGDIObject absolute ABitmap;
const
  CairoImageFormatToDepth: array[cairo_format_t] of integer =
  (
    {CAIRO_FORMAT_INVALID}   -1,
    {CAIRO_FORMAT_ARGB32}    32,
    {CAIRO_FORMAT_RGB24}     24,
    {CAIRO_FORMAT_A8}         8,
    {CAIRO_FORMAT_A1}         1,
    {CAIRO_FORMAT_RGB16_565} 16,
    {CAIRO_FORMAT_RGB30}     15
  );

This matter was discussed in the tail end of https://forum.lazarus.freepascal.org/index.php/topic,50400.0.html

Patch or pull request can be provided if you need it.

Davo