test(docx): add PNG fallback generation test for SVG

Just look at --trace output.
Can't use a golden test because the actual .png will be different
depending on rsvg-convert version.

Signed-off-by: Edwin Török <edwin@etorok.net>

src/Text/Pandoc/ImageSize.hs

@@ -166,8 +166,8 @@ sizeInPoints s = (pxXf * 72 / dpiXf, pxYf * 72 / dpiYf)
 -- | Calculate (height, width) in points, considering the desired dimensions in the
 -- attribute, while falling back on the image file's dpi metadata if no dimensions
 -- are specified in the attribute (or only dimensions in percentages).
-desiredSizeInPoints :: WriterOptions -> Attr -> ImageSize -> (Double, Double)
-desiredSizeInPoints opts attr s =
+desiredSizeInPoints :: WriterOptions -> Attr -> Maybe Integer -> ImageSize -> (Double, Double)
+desiredSizeInPoints opts attr pageWidth' s =
   case (getDim Width, getDim Height) of
     (Just w, Just h)   -> (w, h)
     (Just w, Nothing)  -> (w, w / ratio)
@@ -176,7 +176,11 @@ desiredSizeInPoints opts attr s =
   where
     ratio = fromIntegral (pxX s) / fromIntegral (pxY s)
     getDim dir = case dimension dir attr of
-                   Just (Percent _) -> Nothing
+                   Just (Percent a) ->
+                     case (dir, pageWidth') of
+                     (Width, Just pageWidth) ->
+                       Just $ fromIntegral pageWidth * a
+                     _ -> Nothing
                    Just dim         -> Just $ inPoints opts dim
                    Nothing          -> Nothing
 

src/Text/Pandoc/Writers/Docx.hs

@@ -1538,7 +1538,7 @@ inlineToOpenXML' opts (Image attr@(imgident, _, _) alt (src, title)) = do
       docprid <- getUniqueId
       nvpicprid <- getUniqueId
       let
-        (xpt,ypt) = desiredSizeInPoints opts attr
+        (xpt,ypt) = desiredSizeInPoints opts attr (Just pageWidth)
                (either (const def) id (imageSize opts img))
         -- 12700 emu = 1 pt
         pageWidthPt = case dimension Width attr of

src/Text/Pandoc/Writers/ICML.hs

@@ -613,7 +613,7 @@ imageICML opts style attr (src, _) = do
                report $ CouldNotFetchResource src $ tshow e
                return def)
   let (ow, oh) = sizeInPoints imgS
-      (imgWidth, imgHeight) = desiredSizeInPoints opts attr imgS
+      (imgWidth, imgHeight) = desiredSizeInPoints opts attr Nothing imgS
       hw = showFl $ ow / 2
       hh = showFl $ oh / 2
       scale = showFl (imgWidth / ow) <> " 0 0 " <> showFl (imgHeight / oh)

src/Text/Pandoc/Writers/RTF.hs

@@ -64,7 +64,7 @@ rtfEmbedImage opts x@(Image attr _ (src,_)) = catchError
                                 <> "\\pichgoal" <> tshow (floor (ypt * 20) :: Integer)
                         -- twip = 1/1440in = 1/20pt
                         where (xpx, ypx) = sizeInPixels sz
-                              (xpt, ypt) = desiredSizeInPoints opts attr sz
+                              (xpt, ypt) = desiredSizeInPoints opts attr Nothing sz
              let raw = "{\\pict" <> filetype <> sizeSpec <> " " <>
                         T.concat bytes <> "}"
              if B.null imgdata

test/command/9288.md

@@ -0,0 +1,49 @@
+```
+% pandoc -f native -t docx -o /dev/null --trace --quiet
+[ Figure
+    ( "" , [] , [] )
+    (Caption Nothing [ Plain [ Str "5in" ] ])
+    [ Plain
+        [ Image
+            ( "" , [] , [ ( "width" , "5in" ) ] )
+            [ Str "5in" ]
+            ( "command/SVG_logo.svg" , "" )
+        ]
+    ]
+, Figure
+    ( "" , [] , [] )
+    (Caption Nothing [ Plain [ Str "5in" ] ])
+    [ Plain
+        [ Image
+            ( "" , [] , [ ( "width" , "5in" ) ] )
+            [ Str "5in" ]
+            ( "command/SVG_logo.svg" , "" )
+        ]
+    ]
+, Figure
+    ( "" , [] , [] )
+    (Caption Nothing [ Plain [ Str "80%" ] ])
+    [ Plain
+        [ Image
+            ( "" , [] , [ ( "width" , "80%" ) ] )
+            [ Str "5in" ]
+            ( "command/SVG_logo.svg" , "" )
+        ]
+    ]
+, Figure
+    ( "" , [] , [] )
+    (Caption Nothing [ Plain [ Str "default" ] ])
+    [ Plain
+        [ Image
+            ( "" , [] , [] )
+            [ Str "5in" ]
+            ( "command/SVG_logo.svg" , "" )
+        ]
+    ]
+]
+^D
+2> [trace] rsvg-convert -f png -a --dpi-x 96 --dpi-y 96 --width 360.000000pt --height 360.000000pt
+2> [trace] rsvg-convert -f png -a --dpi-x 96 --dpi-y 96 --width 360.000000pt --height 360.000000pt
+2> [trace] rsvg-convert -f png -a --dpi-x 96 --dpi-y 96 --width 336.000000pt --height 336.000000pt
+2> [trace] rsvg-convert -f png -a --dpi-x 96 --dpi-y 96 --width 75.000000pt --height 75.000000pt
+```