Apache OpenOffice (AOO) Bugzilla – Issue 101402
Slide show: comb slide transition is slow on Windows
Last modified: 2017-05-20 11:11:16 UTC
The comb (horizontal) slide transition is relatively (when compared to other transition types) on Windows. How to reproduce: 1. Create new Impress document 2. Create one more slide. 3. Change background of new slide color to black. 4. Assign slide transition effect "Comb Horizontal" to second slide. 5. Start presentation and hit space to start transition. Animation is more jerky then with other transition types. It takes more than 100ms to render each frame.
The strange/funny part about this bug: When you turn hardware acceleration off then rendering frames for this type of transition animation becomes faster. That is because the VCL canvas, that is used as non-hardware accelerated canvas, uses GDI (no plus) for painting bitmaps. This IS hardware accelerated. The DirectX canvas uses GDI+ for painting bitmaps. This is NOT hardware accelerated. One way to fix this is to use DirectX to paint bitmaps.
Changing target to OOo 3.3.
Changing target due to time constraints.
Changing target.
Reset assigne to the default "issues@openoffice.apache.org".