bugFreeciv - Bugs: bug #22457, Fully transparent flags

 
 
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bug #22457: Fully transparent flags

Submitted by:  Marko Lindqvist <cazfi>
Submitted on:  Sun Aug 10 21:52:56 2014  
 
Category: client-gtk-3.0Severity: 3 - Normal
Priority: 5 - NormalStatus: Fixed
Assigned to: Marko Lindqvist <cazfi>Open/Closed: Closed
Release: Operating System: None
Planned Release: 2.4.4, 2.5.0-beta2, 2.6.0Contains string changes: None

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Tue Aug 19 22:36:18 2014, SVN revision 25955:

Fixed gtk3-client sprite boundaries checking to work in high-endian environments.

See bug #22457

(Browse SVN revision 25955)

Marko Lindqvist <cazfi>
Project AdministratorIn charge of this item.
Tue Aug 19 22:36:12 2014, SVN revision 25954:

Fixed gtk3-client sprite boundaries checking to work in high-endian environments.

See bug #22457

(Browse SVN revision 25954)

Marko Lindqvist <cazfi>
Project AdministratorIn charge of this item.
Tue Aug 19 22:36:03 2014, SVN revision 25953:

Fixed gtk3-client sprite boundaries checking to work in high-endian environments.

See bug #22457

(Browse SVN revision 25953)

Marko Lindqvist <cazfi>
Project AdministratorIn charge of this item.
Thu Aug 14 23:15:33 2014, comment #4:

This is endianness problem. From cairo documentation about CAIRO_FORMAT_ARGB32: "The 32-bit quantities are stored native-endian." So sprite_get_bounding_box() was not checking of transparency (alpha channel) but Blue component. Flags with no blue were considered totally transparent.

Fix attached.

(file #21731)

Marko Lindqvist <cazfi>
Project AdministratorIn charge of this item.
Sun Aug 10 23:45:02 2014, comment #3:

> Does this explain bug #21692?


Indeed, bug #21692 seems like more general problem than this single symptom I've noticed.
The absent German flag is certainly this one (not a single pixel visible). Others sound like sprite_get_bounding_box() found limits of the flag, but parts of what should be included are left out.

Marko Lindqvist <cazfi>
Project AdministratorIn charge of this item.
Sun Aug 10 23:27:35 2014, comment #2:

Does this explain bug #21692?

Jacob Nevins <jtn>
Project Administrator
Sun Aug 10 21:56:16 2014, comment #1:

List of affected flags from the load_gfxfile() test I run:

aborigines-large.png
aborigines-shield-large.png
aram-large.png
aram-shield-large.png
avar-large.png
avar-shield-large.png
baden-large.png
baden-shield-large.png
chuvashia-large.png
chuvashia-shield-large.png
germany-large.png
germany-shield-large.png
ghaznavid-large.png
ghaznavid-shield-large.png
gupta-large.png
gupta-shield-large.png
illyria-large.png
illyria-shield-large.png
kashubia-large.png
kashubia-shield-large.png
macedonia-large.png
macedonia-shield-large.png
numidia-large.png
numidia-shield-large.png
ottoman-large.png
ottoman-shield-large.png
saka-large.png
saka-shield-large.png
scythia-large.png
scythia-shield-large.png
sikh-large.png
sikh-shield-large.png
silesia-large.png
silesia-shield-large.png
rvn-large.png
rvn-shield-large.png
soviet-large.png
soviet-shield-large.png
tuareg-large.png
tuareg-shield-large.png
wallonia-large.png
wallonia-shield-large.png

Marko Lindqvist <cazfi>
Project AdministratorIn charge of this item.
Sun Aug 10 21:52:56 2014, original submission:

Continuation from bug #21373

sprite_get_bounding_box() still considers some flags completely empty (all pixels completely transparent).
These cases seem to be flags that cairo_image_surface_create_from_png() returns as CAIRO_FORMAT_ARGB32 from the beginning, and they are broken immediately after being loaded (test with sprite_get_bounding_box() used in load_gfxfile())

Marko Lindqvist <cazfi>
Project AdministratorIn charge of this item.

 

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Attach File(s):
   
   
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Attached Files
file #21731:  Gtk3Endianness.patch added by cazfi (2kB - text/x-diff)

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -unavailable- added by jtn (Posted a comment)
  • -unavailable- added by cazfi (Submitted the item)
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    Follow 6 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Tue Aug 19 22:36:28 2014cazfiStatusReady For Test=>Fixed
      Assigned toNone=>cazfi
      Open/ClosedOpen=>Closed
    Thu Aug 14 23:15:33 2014cazfiAttached File-=>Added Gtk3Endianness.patch, #21731
      StatusNone=>Ready For Test
      Planned Release=>2.4.4, 2.5.0-beta2, 2.6.0
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