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👏 👏 👏 Check out video about the library: A full-featured 2D graphics library for Nim (NimConf 2021) 👏 👏 👏
Pixie is a 2D graphics library similar to Cairo and Skia written entirely in Nim.
This library is being actively developed and we'd be happy for you to use it.
nimby install pixie
Pixie includes CPU rasterization, image codecs, text layout, paths, paints, masking, blending, and SIMD-accelerated operations.
- Pixie 5.0 performance improvements
- The details of JPEG decoding in Nim
- A full-featured 2D graphics library for Nim (NimConf 2021)
Features:
- Typesetting and rasterizing text, including styled rich text via spans.
- Drawing paths, shapes and curves with even-odd and non-zero windings.
- Pixel-perfect AA quality.
- Supported file formats are PNG, BMP, JPG, SVG + more in development.
- Strokes with joins and caps.
- Shadows, glows and blurs.
- Complex masking: Subtract, Intersect, Exclude.
- Complex blends: Darken, Multiply, Color Dodge, Hue, Luminosity... etc.
- Many operations are SIMD accelerated.
| Format | Read | Write |
|---|---|---|
| PNG | ✅ | ✅ |
| JPEG | ✅ | |
| BMP | ✅ | ✅ |
| QOI | ✅ | ✅ |
| GIF | ✅ | |
| SVG | ✅ | |
| PPM | ✅ | ✅ |
| Format | Read |
|---|---|
| TTF | ✅ |
| OTF | ✅ |
| SVG | ✅ |
Supported Caps:
- Butt
- Round
- Square
Supported Joins:
- Miter (with miter angle limit)
- Bevel
- Round
Supported Blend Modes:
- Normal
- Darken
- Multiply
- ColorBurn
- Lighten
- Screen
- Color Dodge
- Overlay
- Soft Light
- Hard Light
- Difference
- Exclusion
- Hue
- Saturation
- Color
- Luminosity
Supported Mask Modes:
- Mask
- Overwrite
- Subtract Mask
- Intersect Mask
- Exclude Mask
| Format | Supported | Description |
|---|---|---|
| M m | ✅ | move to |
| L l | ✅ | line to |
| H h | ✅ | horizontal line to |
| V v | ✅ | vertical line to |
| C c S s | ✅ | cubic curve to |
| Q q T t | ✅ | quadratic curve to |
| A a | ✅ | arc to |
| z | ✅ | close path |
To learn how to use Pixie for realtime graphics with GPU, check out Boxy.
nim r tests/tests.nim
git clone https://github.com/treeform/pixie to run examples.
nim c -r examples/text.nim
var font = readFont("examples/data/Roboto-Regular_1.ttf")
font.size = 20
let text = "Typesetting is the arrangement and composition of text in graphic design and publishing in both digital and traditional medias."
image.fillText(font.typeset(text, vec2(180, 180)), translate(vec2(10, 10)))
nim c -r examples/text_spans.nim
let typeface = readTypeface("examples/data/Ubuntu-Regular_1.ttf")
proc newFont(typeface: Typeface, size: float32, color: Color): Font =
result = newFont(typeface)
result.size = size
result.paint.color = color
let spans = @[
newSpan("verb [with object] ",
newFont(typeface, 12, color(0.78125, 0.78125, 0.78125, 1))),
newSpan("strallow\n", newFont(typeface, 36, color(0, 0, 0, 1))),
newSpan("\nstral·low\n", newFont(typeface, 13, color(0, 0.5, 0.953125, 1))),
newSpan("\n1. free (something) from restrictive restrictions \"the regulations are intended to strallow changes in public policy\" ",
newFont(typeface, 14, color(0.3125, 0.3125, 0.3125, 1)))
]
image.fillText(typeset(spans, vec2(180, 180)), translate(vec2(10, 10)))
nim c -r examples/square.nim
let ctx = newContext(image)
ctx.fillStyle = rgba(255, 0, 0, 255)
let
pos = vec2(50, 50)
wh = vec2(100, 100)
ctx.fillRect(rect(pos, wh))
nim c -r examples/line.nim
let ctx = newContext(image)
ctx.strokeStyle = "#FF5C00"
ctx.lineWidth = 10
let
start = vec2(25, 25)
stop = vec2(175, 175)
ctx.strokeSegment(segment(start, stop))
nim c -r examples/rounded_rectangle.nim
let ctx = newContext(image)
ctx.fillStyle = rgba(0, 255, 0, 255)
let
pos = vec2(50, 50)
wh = vec2(100, 100)
r = 25.0
ctx.fillRoundedRect(rect(pos, wh), r)
nim c -r examples/heart.nim
image.fillPath(
"""
M 20 60
A 40 40 90 0 1 100 60
A 40 40 90 0 1 180 60
Q 180 120 100 180
Q 20 120 20 60
z
""",
parseHtmlColor("#FC427B").rgba
)
nim c -r examples/masking.nim
let ctx = newContext(lines)
ctx.strokeStyle = "#F8D1DD"
ctx.lineWidth = 30
ctx.strokeSegment(segment(vec2(25, 25), vec2(175, 175)))
ctx.strokeSegment(segment(vec2(25, 175), vec2(175, 25)))
mask.fillPath(
"""
M 20 60
A 40 40 90 0 1 100 60
A 40 40 90 0 1 180 60
Q 180 120 100 180
Q 20 120 20 60
z
""",
color(1, 1, 1, 1)
)
lines.draw(mask, blendMode = MaskBlend)
image.draw(lines)
nim c -r examples/gradient.nim
let paint = newPaint(RadialGradientPaint)
paint.gradientHandlePositions = @[
vec2(100, 100),
vec2(200, 100),
vec2(100, 200)
]
paint.gradientStops = @[
ColorStop(color: color(1, 0, 0, 1), position: 0),
ColorStop(color: color(1, 0, 0, 0.15625), position: 1.0),
]
image.fillPath(
"""
M 20 60
A 40 40 90 0 1 100 60
A 40 40 90 0 1 180 60
Q 180 120 100 180
Q 20 120 20 60
z
""",
paint
)
nim c -r examples/image_tiled.nim
let path = newPath()
path.polygon(
vec2(100, 100),
70,
sides = 8
)
let paint = newPaint(TiledImagePaint)
paint.image = readImage("examples/data/mandrill.png")
paint.imageMat = scale(vec2(0.08, 0.08))
image.fillPath(path, paint)
nim c -r examples/shadow.nim
let path = newPath()
path.polygon(vec2(100, 100), 70, sides = 8)
let polygonImage = newImage(200, 200)
polygonImage.fillPath(path, rgba(255, 255, 255, 255))
let shadow = polygonImage.shadow(
offset = vec2(2, 2),
spread = 2,
blur = 10,
color = rgba(0, 0, 0, 200)
)
image.draw(shadow)
image.draw(polygonImage)
nim c -r examples/blur.nim
let path = newPath()
path.polygon(vec2(100, 100), 70, sides = 6)
let mask = newImage(200, 200)
mask.fillPath(path, color(1, 1, 1, 1))
blur.blur(20)
blur.draw(mask, blendMode = MaskBlend)
image.draw(trees)
image.draw(blur)
nim c -r examples/tiger.nim
let tiger = readImage("examples/data/tiger.svg")
image.draw(
tiger,
translate(vec2(100, 100)) *
scale(vec2(0.2, 0.2)) *
translate(vec2(-450, -450))
)