fix cairo svg, add svg upscale test, stroke optimization

experiments/benchmark_cairo.nim

@@ -1,96 +1,141 @@
-import benchy, cairo, chroma, math, pixie
+import benchy, cairo, chroma, math, pixie, pixie/paths {.all.}, strformat
+
+proc doDiff(a, b: Image, name: string) =
+  let (diffScore, diffImage) = diff(a, b)
+  echo &"{name} score: {diffScore}"
+  diffImage.writeFile(&"{name}_diff.png")
 
 block:
+  let path = newPath()
+  path.moveTo(0, 0)
+  path.lineTo(1920, 0)
+  path.lineTo(1920, 1080)
+  path.lineTo(0, 1080)
+  path.closePath()
+
+  let shapes = path.commandsToShapes(true, 1)
+
   let
     surface = imageSurfaceCreate(FORMAT_ARGB32, 1920, 1080)
     ctx = surface.create()
-
   ctx.setSourceRgba(0, 0, 1, 1)
 
   timeIt "cairo1":
     ctx.newPath()
-    ctx.moveTo(0, 0)
-    ctx.lineTo(1920, 0)
-    ctx.lineTo(1920, 1080)
-    ctx.lineTo(0, 1080)
-    ctx.closePath()
+    ctx.moveTo(shapes[0][0].x, shapes[0][0].y)
+    for shape in shapes:
+      for v in shape:
+        ctx.lineTo(v.x, v.y)
     ctx.fill()
     surface.flush()
 
   # discard surface.writeToPng("cairo1.png")
 
   let a = newImage(1920, 1080)
-  a.fill(rgba(255, 255, 255, 255))
 
   timeIt "pixie1":
     let p = newPath()
-    p.moveTo(0, 0)
-    p.lineTo(1920, 0)
-    p.lineTo(1920, 1080)
-    p.lineTo(0, 1080)
-    p.closePath()
+    p.moveTo(shapes[0][0])
+    for shape in shapes:
+      for v in shape:
+        p.lineTo(v)
     a.fillPath(p, rgba(0, 0, 255, 255))
 
   # a.writeFile("pixie1.png")
 
 block:
+  let path = newPath()
+  path.moveTo(500, 240)
+  path.lineTo(1500, 240)
+  path.lineTo(1920, 600)
+  path.lineTo(0, 600)
+  path.closePath()
+
+  let shapes = path.commandsToShapes(true, 1)
+
   let
     surface = imageSurfaceCreate(FORMAT_ARGB32, 1920, 1080)
     ctx = surface.create()
 
-  ctx.setSourceRgba(0, 0, 1, 1)
-
   timeIt "cairo2":
+    ctx.setSourceRgba(1, 1, 1, 1)
+    let operator = ctx.getOperator()
+    ctx.setOperator(OperatorSource)
+    ctx.paint()
+    ctx.setOperator(operator)
+
+    ctx.setSourceRgba(0, 0, 1, 1)
+
     ctx.newPath()
-    ctx.moveTo(500, 240)
-    ctx.lineTo(1500, 240)
-    ctx.lineTo(1920, 600)
-    ctx.lineTo(0, 600)
-    ctx.closePath()
+    ctx.moveTo(shapes[0][0].x, shapes[0][0].y)
+    for shape in shapes:
+      for v in shape:
+        ctx.lineTo(v.x, v.y)
     ctx.fill()
-  surface.flush()
+    surface.flush()
 
   # discard surface.writeToPng("cairo2.png")
 
   let a = newImage(1920, 1080)
-  a.fill(rgba(255, 255, 255, 255))
 
   timeIt "pixie2":
+    a.fill(rgba(255, 255, 255, 255))
+
     let p = newPath()
-    p.moveTo(500, 240)
-    p.lineTo(1500, 240)
-    p.lineTo(1920, 600)
-    p.lineTo(0, 600)
-    p.closePath()
+    p.moveTo(shapes[0][0])
+    for shape in shapes:
+      for v in shape:
+        p.lineTo(v)
     a.fillPath(p, rgba(0, 0, 255, 255))
 
   # a.writeFile("pixie2.png")
 
-# block:
-#   let
-#     a = imageSurfaceCreate(FORMAT_ARGB32, 1000, 1000)
-#     b = imageSurfaceCreate(FORMAT_ARGB32, 500, 500)
-#     ac = a.create()
-#     bc = b.create()
-
-#   ac.setSourceRgba(1, 0, 0, 1)
-#   ac.newPath()
-#   ac.rectangle(0, 0, 1000, 1000)
-#   ac.fill()
-
-#   bc.setSourceRgba(0, 1, 0, 1)
-#   bc.newPath()
-#   bc.rectangle(0, 0, 500, 500)
-#   bc.fill()
-
-#   let pattern = patternCreateForSurface(b)
-
-#   timeIt "a":
-#     ac.setSource(pattern)
-#     ac.save()
-#     ac.translate(25.2, 25.2)
-#     ac.rectangle(0, 0, 500, 500)
-#     ac.fill()
-#     ac.restore()
-
-#   discard a.writeToPng("a.png")
+block:
+  let path = parsePath("""
+      M 100,300
+      A 200,200 0,0,1 500,300
+      A 200,200 0,0,1 900,300
+      Q 900,600 500,900
+      Q 100,600 100,300 z
+  """)
+
+  let shapes = path.commandsToShapes(true, 1)
+
+  let
+    surface = imageSurfaceCreate(FORMAT_ARGB32, 1000, 1000)
+    ctx = surface.create()
+
+  timeIt "cairo3":
+    ctx.setSourceRgba(1, 1, 1, 1)
+    let operator = ctx.getOperator()
+    ctx.setOperator(OperatorSource)
+    ctx.paint()
+    ctx.setOperator(operator)
+
+    ctx.setSourceRgba(1, 0, 0, 1)
+
+    ctx.newPath()
+    ctx.moveTo(shapes[0][0].x, shapes[0][0].y)
+    for shape in shapes:
+      for v in shape:
+        ctx.lineTo(v.x, v.y)
+    ctx.fill()
+    surface.flush()
+
+  # discard surface.writeToPng("cairo3.png")
+
+  let a = newImage(1000, 1000)
+
+  timeIt "pixie3":
+    a.fill(rgba(255, 255, 255, 255))
+
+    let p = newPath()
+    p.moveTo(shapes[0][0])
+    for shape in shapes:
+      for v in shape:
+        p.lineTo(v)
+    a.fillPath(p, rgba(255, 0, 0, 255))
+
+  # a.writeFile("pixie3.png")
+
+  # doDiff(readImage("cairo3.png"), a, "cairo3")