Bug 576609

Summary:	[win32] Use GDI+ to load images
Product:	[Eclipse Project] Platform	Reporter:	Alexandr Miloslavskiy <alexandr.miloslavskiy>
Component:	SWT	Assignee:	Platform-SWT-Inbox <platform-swt-inbox>
Status:	NEW ---	QA Contact:
Severity:	normal
Priority:	P3	CC:	akurtakov, alexandr.miloslavskiy
Version:	4.22
Target Milestone:	---
Hardware:	PC
OS:	Windows 10
See Also:	https://bugs.eclipse.org/bugs/show_bug.cgi?id=576334
Whiteboard:

Description Alexandr Miloslavskiy

2021-10-13 10:32:40 EDT

If I remember correctly, currently Win7 is the minimum supported Windows for SWT. This means that GDI+ must always be present.

GDI+ is capable of loading all sorts of image formats; [1] says:
  You can construct Image objects from a variety of file types including
  BMP, ICON, GIF, JPEG, Exif, PNG, TIFF, WMF, and EMF.

However, SWT on Windows still uses custom code to load images, see 'ImageLoader',
which is documented to support:
 BMP, ICO, JPEG, GIF, PNG, TIFF

SWT's code is not without bugs, see for example Bug 576334.

Therefore, it sounds like a good idea to replace SWT's custom code with GDI+.
SWT seems to already have some GDI+ code, see for example 'Image.initNative()'.

[1] https://docs.microsoft.com/en-us/windows/win32/api/gdiplusheaders/nl-gdiplusheaders-image

Comment 1 Alexandr Miloslavskiy

2021-10-13 10:33:54 EDT

Note that on GTK, SWT already uses GTK's loader instead of custom code.