[Libreoffice-bugs] [Bug 117330] New: Images in gallery look poor when they are small

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=117330

            Bug ID: 117330
           Summary: Images in gallery look poor when they are small
           Product: LibreOffice
           Version: 6.0.4.1 rc
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: minor
          Priority: medium
         Component: UI
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: sergio.callegari at gmail.com

Description:
When a vector drawing is put in the gallery, recent versions of LibO (I think
since LibO 4.x or 5.x) create a bitmap to show in the gallery, that also
details if the object has a solid background or not.

Unfortunately, this preview bitmap is taken at a fixed resolution ignoring the
drawing size. This is not the best thing to do as it results in wasted
resources when the image is big and in a poor rendering in the gallery when the
image is small.

Consider the following example:

1) A 10 inch X 10 inch vector object (e.g., a whole drawing) is placed in the
gallery. Assuming that the preview bitmap is taken at 100dpi (I do not know the
exact resolution being used), a 1000x1000 pixel bitmap is used for the preview.
When the preview appears in the gallery, given that the object will likely be
offered a 0.5x0.5 inch space, the preview will have a quite redundant 2000 dpi
effective resolution.

2) A small vectory symbol 0.25 x 0.25 inches is placed in the gallery. Assuming
that the preview bitmap is taken at 100dpi (I do not know the exact resolution
being used), a 25x25 pixel bitmap is used for the preview. When the preview
appears in the gallery, given that the object will likely be offered a 0.5x0.5
inch space, the preview will have a poor 50 dpi effective resolution.

Imho, the preview bitmap in the gallery should be created with a fixed number
of pixels on the x and y axis (e.g. 256), so that it always shows well when the
gallery is opened.
means that when the bitmap is shown in gallery, being given a fixed size, it is
shown at different resolutions, 

Steps to Reproduce:
See description

Actual Results:  
See description

Expected Results:
See description


Reproducible: Always


User Profile Reset: No



Additional Info:
[Information automatically included from LibreOffice]
Locale: en-US
Module: DrawingDocument
[Information guessed from browser]
OS: Linux (All)
OS is 64bit: yes


User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:59.0) Gecko/20100101
Firefox/59.0

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/libreoffice-bugs/attachments/20180429/4a4cbaab/attachment.html>