Fix SVG symbol sizing when width and height are with physical units #7054
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mapcentia wants to merge 4 commits intoMapServer:mainfrom
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Fix SVG symbol sizing when width and height are with physical units #7054mapcentia wants to merge 4 commits intoMapServer:mainfrom
mapcentia wants to merge 4 commits intoMapServer:mainfrom
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…x, in, cm, mm, pt, pc) will get size from the viewBox if present. so a symbol like this: ```svg <svg xmlns="http://www.w3.org/2000/svg" width="5.5mm" height="5.5mm" viewBox="0 0 15 15">..</svg> ``` will get sized according to the viewBox. But 5.5mm is 20px, so the symbol will end up cropped on the map. This patch will test if the symbol has intrinsic size and use rsvg_handle_get_intrinsic_size_in_pixels to get the pixel size.
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The build test fails because it uses Ubuntu 20.04 with rsvg 2.48. It's worth reading the docs for It's not necessary to test the symbol for having a width and height any longer, because it will always have them (it a geometry property of the svg symbol) |
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@mapcentia - thanks for the pull request. #if LIBRSVG_CHECK_VERSION(2, 46, 0)
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@geographika Yes. I'll try to setup a build environment based on 20.04. |
The matrix of conditionals around SVG size extraction has been refactored in mapcairo.c. With this change, the symbols' height and width are better handled depending on the presence of width and height attributes, their units, and the viewBox. The conditions now account for newest LIBRSVG versions and fallback for older ones.
…d it that case use rsvg_handle_get_intrinsic_size_in_pixels to get SVG size in pixels.
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SVG symbols having width and height attributes with physical units (px, in, cm, mm, pt, pc) will get sized from the viewBox if present. so a symbol like this:
will get sized according to the viewBox. But 5.5mm is 20px, so the symbol will end up cropped on the map.
This patch will test if the symbol has intrinsic size and use rsvg_handle_get_intrinsic_size_in_pixels to get the pixel size and size the symbol from that.