Feature: more intuitive radius (SVG)

src/QRgen/private/DrawedQRCode/print.nim

@@ -50,7 +50,7 @@ const modulePathEnd: string =
 const moduleRect: string =
   """<rect class="qrDark qrRounded qrModule"""" &
   """ fill="{dark}" x="{float(x)+0.1}" y="{float(y)+0.1}"""" &
-  """ width="0.8" height="0.8" rx="{moRad:<.3}"></rect>"""
+  """ width="0.8" height="0.8" rx="{moRadPx:<.3}"></rect>"""
 
 const alignmentPatternRect: string =
   """<rect class="qr{m} qrRounded qrAlignment"""" &
@@ -72,12 +72,12 @@ func roundedRect(x, y, w, h: uint8, r: float, m, c: string): string =
   fmt(alignmentPatternRect)
 
 template checkRadius(lvl: range[1'i8..2'i8]): float32 =
-  if alRad == 0: 0f
-  elif alRad-lvl <= 0: 1f / (lvl * 2)
-  else: alRad-lvl
+  if alRadPx == 0: 0f
+  elif alRadPx-lvl <= 0: 1f / (lvl * 2)
+  else: alRadPx-lvl
 
 template drawRoundedAlignmentPattern(x, y: uint8): string =
-  roundedRect(x, y, 7'u8, 7'u8, alRad, "dark", dark) &
+  roundedRect(x, y, 7'u8, 7'u8, alRadPx, "dark", dark) &
   roundedRect(x+1, y+1, 5'u8, 5'u8, checkRadius 1, "light", light) &
   roundedRect(x+2, y+2, 3'u8, 3'u8, checkRadius 2, "dark", dark)
 
@@ -114,15 +114,16 @@ func printSvg*(
   self: DrawedQRCode,
   light = "#ffffff",
   dark = "#000000",
-  alRad: range[0f32..3.5f32],
+  alRad: range[0f32..100f32],
   class: string = "qrCode",
   id: string = ""
 ): string =
   ## Same as `print<#printSvg%2CDrawedQRCode%2Cstring%2Cstring>`_
   ## but with rounded alignment patterns determined by `alRad` which
-  ## can be from `0` (a square) up to `3.5`, which would make it a perfect
-  ## circle.
+  ## is a percentage (from `0.0` to `100.0`), being `0.0` a square and `100.0`
+  ## a perfect circle.
   result = fmt(svgHeader)
+  let alRadPx: float32 = 3.5 * alRad / 100
   result.add fmt(modulePathStart)
   drawRegionWithoutAlPatterns modulePath
   result.add fmt(modulePathEnd)
@@ -133,15 +134,18 @@ func printSvg*(
   self: DrawedQRCode,
   light = "#ffffff",
   dark = "#000000",
-  alRad: range[0f32..3.5f32],
-  moRad: range[0f32..0.4f32],
+  alRad: range[0f32..100f32],
+  moRad: range[0f32..100f32],
   class: string = "qrCode",
   id: string = ""
 ): string =
   ## Same as `print<#printSvg%2CDrawedQRCode%2Cstring%2Cstring%2Crange[]>`_
-  ## but with with rounded modules determined by `moRad` which can be
-  ## from `0` (a square) up to `0.4`, which would make it a perfect circle.
+  ## but with rounded modules determined by `moRad` which is a percentage
+  ## (from `0.0` to `100.0`), being `0.0` a square and `100.0` a perfect circle.
   result = fmt(svgHeader)
+  let
+    alRadPx: float32 = 3.5 * alRad / 100
+    moRadPx: float32 = 0.4 * moRad / 100
   drawRegionWithoutAlPatterns moduleRect
   drawRoundedAlignmentPatterns
   result.add svgEnd

tests/testQRGen.nim

@@ -40,13 +40,12 @@ benchmarkTest "Testing rounded svg":
   let qr = newQR("https://github.com/aruZeta/QRgen")
   writeFile(
     "build" / "testingRoundedSvg.svg",
-    qr.printSvg("#1d2021", "#98971a", alRad = 2)
+    qr.printSvg("#1d2021", "#98971a", alRad = 60)
   )
 
 benchmarkTest "Testing very rounded svg":
   let qr = newQR("https://github.com/aruZeta/QRgen")
   writeFile(
     "build" / "testingVeryRoundedSvg.svg",
-    qr.printSvg("#1d2021", "#98971a", alRad = 3.5, moRad = 0.4)
+    qr.printSvg("#1d2021", "#98971a", alRad = 100, moRad = 100)
   )
-