Review Request 122673: Make Svg, FrameSvg work qith QT_DEVICE_PIXELRATIO

[David Edmundson]

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We don't want to alter the measures. Qt is already scaling co-ordinates by QT_DEVICE_PIXEL_RATIO. 
If we double them here we will surely end up scaling things twice?

- David Edmundson


On Feb. 22, 2015, 1:39 p.m., Marco Martin wrote:
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> https://git.reviewboard.kde.org/r/122673/
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> (Updated Feb. 22, 2015, 1:39 p.m.)
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> Review request for Plasma.
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> Repository: plasma-framework
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> Description
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> (still in progress but here for feedback)
> when QT_DEVICE_PIXELRATIO is something different from 1, the pixmaps generated by Svg will be scaled up to give a proper texture.
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> This is complementary but not replacing our current approach:
> the pixelratio that can be accessed by units is now in relation to the qt pixel ratio, spacings are also adjusted accordingly (therefore, spaces and sizes won't need an integer value like pixelratio)
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> svg introduces also a scaleFactor property (that is pretty much like its old pixelRatio)
> basically, scalefactor, will scale both the textures *and* all the reported sizes, (old method) pixelratio just scales textures without altering measures (like qt pixelratio likes)
> they are now both used and combined, so a) we can have this working before supporting officially qt pixelratio when will be good enough but b) keeping the old mwthod working for the time being c) by using both at the sae time we can at least scale sizes of values != from integers, for screens that are too dense for 1 and not enough for 2
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> Diffs
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>   src/declarativeimports/core/framesvgitem.cpp dae8a4f 
>   src/declarativeimports/core/svgitem.cpp 570c1c3 
>   src/declarativeimports/core/units.h 6c038ba 
>   src/declarativeimports/core/units.cpp a740145 
>   src/plasma/private/svg_p.h a31d0ac 
>   src/plasma/svg.h 0bcbd7a 
>   src/plasma/svg.cpp 0a0db5e 
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> Diff: https://git.reviewboard.kde.org/r/122673/diff/
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> Testing
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> Thanks,
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> Marco Martin
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