SVG to image

[Mark Waddingham]

Perhaps the drawing library could do with 'CompileIcon' which does the wrapping as your code does and then compiles the resulting SVG XML.

In the interim - IIRC - there is an '_internal' command used in the drawing library which returns the bbox of an SVG path string which will allow you to compute width/height correctly.

Warmest Regards,

Mark.

Sent from my iPhone

> On 16 Sep 2018, at 17:50, hh via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> Import the source of a SVG icon widget to a PNG file:
> +++++++++++++++++++++++++++++++++++++++++++++++++++++
> 
> The iconPath of an SVG icon is path data only (could be used as
> "instructions" for a path in LCB).
> 
> So try to write a wrapper around it to make it valid SSVG data.
> 
> The problem is the bounding box of the path (the values for w
> and h), there is no info about and it's hard to estimate from all
> the control points of the path.
> 
> I tried just now to do it this way (works here, tested several times):
> 
> on mouseUp
>  lock screen; lock messages
>  put the iconPath of widget "SVG Icon" into path
>  put 2048 into w -- estimate general width of the icons
>  put 2048 into h -- estimate general height of the icons
>  put merge(svgWrapper()) into t
>  if there is no img "import" then create img "import"
>  set text of img "import" to drawingSVGCompile(t)
>  cropIt "import" --> because w and h may be too large
>  set width of img "import" to 100 --> your target width
>  set height of img "import" to 100 --> your target height
>  set topleft of img "import" to 10,10
> end mouseUp
> 
> function svgWrapper
>  return "<?xml version=" &quote& "1.0" &quote& " encoding=" &quote& "UTF-8" &quote& "?>" &CR& \
>        "<svg" &CR& \
>        "   xmlns:svg=" &quote& "http://www.w3.org/2000/svg" &quote& "" &CR& \
>        "   xmlns=" &quote& "http://www.w3.org/2000/svg" &quote& "" &CR& \
>        "   version=" &quote& "1.0" &quote& "" &CR& \
>        "   width=" &quote& "[[w]]" &quote& "  height=" &quote& "[[h]]" &quote& "" &CR& \
>        ">" &CR& \
>        "<path d=" &quote& "[[path]]" &quote& " />" &CR& \
>        "</svg>"end svgWrapper
> 
> ## CROP image ft to its opaque pixels [-hh fecit 2018]
> ## from my stack SVGHandles89 of "Sample Stacks"
>  on cropIt ft
>  put the width of img ft into w
>  put the height of img ft into h
>  put the maskdata of img ft into mData
>  put numToByte(0) into c0
>  -- left and right transparency limits
>  put w into cmin; put 1 into cmax
>  repeat with i=0 to h-1
>    put i*w into h1
>    repeat with j=1 to cmin
>      if byte h1+j of mData is not c0 then
>        put j into cmin; exit repeat
>      end if
>    end repeat
>    repeat with j=w down to max(cmax,cmin)
>      if byte h1+j of mData is not c0 then
>        put j into cmax; exit repeat
>      end if
>    end repeat
>  end repeat
>  put max(0,cmin-1) into cmin
>  put max(1+cmin,min(w,1+cmax)) into cmax
>  -- top and bottom transparency limits
>  put h into rmin; put 1 into rmax
>  repeat with j=cmin to cmax
>    repeat with i=0 to rmin-1
>      if byte i*w+j of mData is not c0 then
>        put i into rmin; exit repeat
>      end if
>    end repeat
>    repeat with i=h-1 down to max(rmax,rmin)
>      if byte i*w+j of mData is not c0 then
>        put i into rmax; exit repeat
>      end if
>    end repeat
>  end repeat
>  put max(0,rmin-1) into rmin
>  put max(1+rmin,min(h,1+rmax)) into rmax
>  --
>  put the left of img ft into L; put the top of img ft into T
>  crop img ft to L+cmin,T+rmin,L+cmax,T+rmax
>  -- LC Bug: resizes instead of cropping when image has angle <> 0
> end cropIt
> 
> 
> 
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