Change APIs some. Add 2 examples.
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README.md
39
README.md
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@ -15,3 +15,42 @@ This library is being actively developed and is not yet ready for use. Since you
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## Testing
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`nimble test`
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## Examples
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### examples/rounded_rectangle.nim
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```nim
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var path = newPath()
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let
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x = 50.0
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y = 50.0
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w = 100.0
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h = 100.0
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nw = 25.0
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ne = 25.0
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se = 25.0
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sw = 25.0
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path.moveTo(x+nw, y)
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path.arcTo(x+w, y, x+w, y+h, ne)
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path.arcTo(x+w, y+h, x, y+h, se)
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path.arcTo(x, y+h, x, y, sw)
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path.arcTo(x, y, x+w, y, nw)
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path.closePath()
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path.closePath()
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image.fillPath(path, rgba(255, 0, 0, 255))
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#image.strokePath(path, rgba(0, 0, 0, 255), strokeWidth = 5.0)
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```
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### examples/square.nim
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```nim
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var p = newPath()
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p.moveTo(50, 50)
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p.lineTo(50, 150)
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p.lineTo(150, 150)
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p.lineTo(150, 50)
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p.closePath()
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image.fillPath(p, rgba(255, 0, 0, 255))
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#image.strokePath(p, rgba(0, 0, 0, 255), strokeWidth = 5.0)
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```
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@ -1 +0,0 @@
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## Include an example on how to use your library
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25
examples/rounded_rectangle.nim
Normal file
25
examples/rounded_rectangle.nim
Normal file
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@ -0,0 +1,25 @@
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import pixie, chroma
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var image = newImageFill(200, 200, rgba(255, 255, 255, 255))
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var path = newPath()
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let
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x = 50.0
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y = 50.0
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w = 100.0
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h = 100.0
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nw = 25.0
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ne = 25.0
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se = 25.0
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sw = 25.0
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path.moveTo(x+nw, y)
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path.arcTo(x+w, y, x+w, y+h, ne)
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path.arcTo(x+w, y+h, x, y+h, se)
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path.arcTo(x, y+h, x, y, sw)
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path.arcTo(x, y, x+w, y, nw)
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path.closePath()
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path.closePath()
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image.fillPath(path, rgba(255, 0, 0, 255))
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#image.strokePath(path, rgba(0, 0, 0, 255), strokeWidth = 5.0)
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image.writeFile("examples/rounded_rectangle.png")
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BIN
examples/rounded_rectangle.png
Normal file
BIN
examples/rounded_rectangle.png
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Binary file not shown.
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After Width: | Height: | Size: 2.1 KiB |
14
examples/square.nim
Normal file
14
examples/square.nim
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@ -0,0 +1,14 @@
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import pixie, chroma
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var image = newImageFill(200, 200, rgba(255, 255, 255, 255))
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var p = newPath()
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p.moveTo(50, 50)
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p.lineTo(50, 150)
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p.lineTo(150, 150)
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p.lineTo(150, 50)
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p.closePath()
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image.fillPath(p, rgba(255, 0, 0, 255))
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#image.strokePath(p, rgba(0, 0, 0, 255), strokeWidth = 5.0)
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image.writeFile("examples/square.png")
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BIN
examples/square.png
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BIN
examples/square.png
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Binary file not shown.
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After Width: | Height: | Size: 918 B |
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@ -32,6 +32,10 @@ proc newImageNoInit*(width, height: int): Image =
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result.height = height
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result.data = newSeq[ColorRGBA](width * height)
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proc wh*(image: Image): Vec2 {.inline.} =
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## Return with and height as a size vector.
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vec2(image.width.float32, image.height.float32)
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proc copy*(image: Image): Image =
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## Copies an image creating a new image.
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result = newImage(image.width, image.height)
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@ -554,14 +554,14 @@ proc strokePolygons*(ps: seq[seq[Vec2]], strokeWidthR, strokeWidthL: float32): s
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{.push checks: off, stacktrace: off.}
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proc fillPolygons*(
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image: Image,
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size: Vec2,
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polys: seq[seq[Vec2]],
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color: ColorRGBA,
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quality = 4,
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): Image =
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const ep = 0.0001 * PI
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result = newImage(image.width, image.height)
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result = newImage(size.x.int, size.y.int)
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proc scanLineHits(
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polys: seq[seq[Vec2]],
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@ -579,7 +579,7 @@ proc fillPolygons*(
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var at: Vec2
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if line.intersects(scan, at):
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let winding = line.at.y > line.to.y
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let x = at.x.clamp(0, image.width.float32)
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let x = at.x.clamp(0, size.x)
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hits.add((x, winding))
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hits.sort(proc(a, b: (float32, bool)): int = cmp(a[0], b[0]))
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@ -623,103 +623,91 @@ proc fillPolygons*(
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{.pop.}
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proc fillPath*(
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image: Image,
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path: Path,
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color: ColorRGBA
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): Image =
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let polys = commandsToPolygons(path.commands)
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image.fillPolygons(polys, color)
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image: Image,
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path: Path,
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color: ColorRGBA
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) =
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let
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polys = commandsToPolygons(path.commands)
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tmp = fillPolygons(image.wh, polys, color)
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image.draw(tmp)
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proc fillPath*(
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image: Image,
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path: string,
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color: ColorRGBA
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): Image =
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image.fillPath(parsePath(path), color)
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proc fillPath*(
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image: Image,
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path: string,
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color: ColorRGBA,
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pos: Vec2
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): Image =
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var polys = commandsToPolygons(parsePath(path).commands)
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for poly in polys.mitems:
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for i, p in poly.mpairs:
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poly[i] = p + pos
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image.fillPolygons(polys, color)
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proc fillPath*(
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image: Image,
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path: Path,
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color: ColorRGBA,
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mat: Mat3
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): Image =
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image: Image,
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path: Path,
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color: ColorRGBA,
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mat: Mat3
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) =
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var polys = commandsToPolygons(path.commands)
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for poly in polys.mitems:
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for i, p in poly.mpairs:
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poly[i] = mat * p
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image.fillPolygons(polys, color)
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let tmp = fillPolygons(image.wh, polys, color)
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image.draw(tmp)
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proc fillPath*(
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image: Image,
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path: string,
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color: ColorRGBA,
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mat: Mat3
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): Image =
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image: Image,
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path: string,
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color: ColorRGBA,
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mat: Mat3
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) =
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image.fillPath(parsePath(path), color, mat)
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proc strokePath*(
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image: Image,
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path: Path,
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color: ColorRGBA,
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strokeWidth: float32,
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# strokeLocation: StrokeLocation,
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# strokeCap: StorkeCap,
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# strokeJoin: StorkeJoin
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): Image =
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let polys = commandsToPolygons(path.commands)
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let (strokeL, strokeR) = (strokeWidth/2, strokeWidth/2)
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let polys2 = strokePolygons(polys, strokeL, strokeR)
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image.fillPolygons(polys2, color)
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image: Image,
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path: Path,
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color: ColorRGBA,
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strokeWidth: float32 = 1.0,
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# strokeLocation: StrokeLocation,
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# strokeCap: StorkeCap,
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# strokeJoin: StorkeJoin
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) =
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let
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polys = commandsToPolygons(path.commands)
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(strokeL, strokeR) = (strokeWidth/2, strokeWidth/2)
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polys2 = strokePolygons(polys, strokeL, strokeR)
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tmp = fillPolygons(image.wh, polys2, color)
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image.draw(tmp)
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proc strokePath*(
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image: Image,
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path: string,
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color: ColorRGBA,
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strokeWidth: float32
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): Image =
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image: Image,
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path: string,
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color: ColorRGBA,
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strokeWidth: float32
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) =
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image.strokePath(parsePath(path), color, strokeWidth)
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proc strokePath*(
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image: Image,
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path: string,
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color: ColorRGBA,
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strokeWidth: float32,
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pos: Vec2
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): Image =
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image: Image,
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path: string,
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color: ColorRGBA,
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strokeWidth: float32,
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pos: Vec2
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) =
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var polys = commandsToPolygons(parsePath(path).commands)
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let (strokeL, strokeR) = (strokeWidth/2, strokeWidth/2)
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var polys2 = strokePolygons(polys, strokeL, strokeR)
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for poly in polys2.mitems:
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for i, p in poly.mpairs:
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poly[i] = p + pos
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image.fillPolygons(polys2, color)
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let tmp = fillPolygons(image.wh, polys2, color)
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image.draw(tmp)
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proc strokePath*(
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image: Image,
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path: string,
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color: ColorRGBA,
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strokeWidth: float32,
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mat: Mat3
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): Image =
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image: Image,
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path: string,
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color: ColorRGBA,
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strokeWidth: float32,
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mat: Mat3
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) =
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var polys = commandsToPolygons(parsePath(path).commands)
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let (strokeL, strokeR) = (strokeWidth/2, strokeWidth/2)
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var polys2 = strokePolygons(polys, strokeL, strokeR)
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for poly in polys2.mitems:
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for i, p in poly.mpairs:
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poly[i] = mat * p
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image.fillPolygons(polys2, color)
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let tmp = fillPolygons(image.wh, polys2, color)
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image.draw(tmp)
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proc addPath*(path: Path, other: Path) =
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## Adds a path to the current path.
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34
tools/gen_readme.nim
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34
tools/gen_readme.nim
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@ -0,0 +1,34 @@
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import os, strutils, osproc
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proc cutBetween(str, a, b: string): string =
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let
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cutA = str.find(a)
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cutB = str.find(b)
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if cutA == -1 or cutB == -1:
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return ""
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return str[cutA + a.len..<cutB]
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var md: seq[string]
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for k, path in walkDir("examples"):
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if path.endsWith(".nim"):
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discard execCmd("nim c -r -d:danger " & path)
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let code = readFile(path)
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let innerCode = code.cutBetween("var image = newImageFill(200, 200, rgba(255, 255, 255, 255))", "image.writeFile")
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if innerCode != "":
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md.add "### " & path.replace("\\", "/")
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md.add "```nim"
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md.add innerCode.strip()
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md.add "```"
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md.add "![example output](" & path.replace(".nim", ".png").replace("\\", "/") & ")"
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md.add ""
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var readme = readFile("README.md")
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let at = readme.find("## Examples")
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if at != -1:
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readme = readme[0 .. at]
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readme.add("# Examples\n\n")
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readme.add(md.join("\n"))
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writeFile("README.md", readme)
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