[Okular-devel] [okular] [Bug 352876] New: [PATCH] Presentation: correct durations for "Fade" transition effect by doing 20 FPS instead of 100 frames total

[Arseniy Lartsev]

https://bugs.kde.org/show_bug.cgi?id=352876

            Bug ID: 352876
           Summary: [PATCH] Presentation: correct durations for "Fade"
                    transition effect by doing 20 FPS instead of 100
                    frames total
           Product: okular
           Version: 0.23.0
          Platform: Compiled Sources
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: receive-spam at yandex.ru

Right now, fade transition is always done in 100 frames. If the intended
duration is, say, 1 second, the actual duration can easily be a few seconds
instead, due to the limited CPU power (on my laptop with core i5, those 100
frames take 2 seconds).

I propose a patch that changes the number of frames to 20*(duration in
seconds). 20 FPS still looks completely smooth to me.

Reproducible: Always

Steps to Reproduce:
1. Open a PDF with 1 second long fade transitions
2. Start a presentation


Actual Results:  
Transitions take 2 seconds, limited by the CPU power

Expected Results:  
Transitions take 1 second

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