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Merge pull request #2114 from uploadcare/getrgb
ImageColor.getrgb hexadecimal RGBA
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79fe70a71a
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@ -31,35 +31,46 @@ def getrgb(color):
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:param color: A color string
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:return: ``(red, green, blue[, alpha])``
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"""
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try:
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rgb = colormap[color]
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except KeyError:
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try:
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# fall back on case-insensitive lookup
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rgb = colormap[color.lower()]
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except KeyError:
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rgb = None
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# found color in cache
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color = color.lower()
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rgb = colormap.get(color, None)
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if rgb:
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if isinstance(rgb, tuple):
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return rgb
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colormap[color] = rgb = getrgb(rgb)
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return rgb
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# check for known string formats
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m = re.match("#\w\w\w$", color)
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if m:
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if re.match('#[a-f0-9]{3}$', color):
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return (
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int(color[1]*2, 16),
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int(color[2]*2, 16),
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int(color[3]*2, 16)
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int(color[3]*2, 16),
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)
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m = re.match("#\w\w\w\w\w\w$", color)
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if m:
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if re.match('#[a-f0-9]{4}$', color):
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return (
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int(color[1]*2, 16),
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int(color[2]*2, 16),
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int(color[3]*2, 16),
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int(color[4]*2, 16),
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)
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if re.match('#[a-f0-9]{6}$', color):
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return (
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int(color[1:3], 16),
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int(color[3:5], 16),
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int(color[5:7], 16)
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int(color[5:7], 16),
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)
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if re.match('#[a-f0-9]{8}$', color):
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return (
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int(color[1:3], 16),
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int(color[3:5], 16),
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int(color[5:7], 16),
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int(color[7:9], 16),
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)
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m = re.match("rgb\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$", color)
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if m:
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return (
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@ -67,6 +78,7 @@ def getrgb(color):
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int(m.group(2)),
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int(m.group(3))
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)
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m = re.match("rgb\(\s*(\d+)%\s*,\s*(\d+)%\s*,\s*(\d+)%\s*\)$", color)
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if m:
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return (
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@ -74,6 +86,7 @@ def getrgb(color):
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int((int(m.group(2)) * 255) / 100.0 + 0.5),
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int((int(m.group(3)) * 255) / 100.0 + 0.5)
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)
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m = re.match("hsl\(\s*(\d+)\s*,\s*(\d+)%\s*,\s*(\d+)%\s*\)$", color)
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if m:
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from colorsys import hls_to_rgb
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@ -87,6 +100,7 @@ def getrgb(color):
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int(rgb[1] * 255 + 0.5),
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int(rgb[2] * 255 + 0.5)
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)
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m = re.match("rgba\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$",
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color)
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if m:
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@ -6,20 +6,115 @@ from PIL import ImageColor
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class TestImageColor(PillowTestCase):
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def test_sanity(self):
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def test_hash(self):
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# short 3 components
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self.assertEqual((255, 0, 0), ImageColor.getrgb("#f00"))
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self.assertEqual((255, 0, 0), ImageColor.getrgb("#ff0000"))
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self.assertEqual((255, 0, 0), ImageColor.getrgb("rgb(255,0,0)"))
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self.assertEqual((255, 0, 0), ImageColor.getrgb("rgb(255, 0, 0)"))
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self.assertEqual((255, 0, 0), ImageColor.getrgb("rgb(100%,0%,0%)"))
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self.assertEqual((255, 0, 0), ImageColor.getrgb("hsl(0, 100%, 50%)"))
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self.assertEqual((255, 0, 0, 0), ImageColor.getrgb("rgba(255,0,0,0)"))
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self.assertEqual(
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(255, 0, 0, 0), ImageColor.getrgb("rgba(255, 0, 0, 0)"))
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self.assertEqual((255, 0, 0), ImageColor.getrgb("red"))
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self.assertEqual((0, 255, 0), ImageColor.getrgb("#0f0"))
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self.assertEqual((0, 0, 255), ImageColor.getrgb("#00f"))
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self.assertRaises(ValueError,
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lambda: ImageColor.getrgb("invalid color"))
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# short 4 components
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self.assertEqual((255, 0, 0, 0), ImageColor.getrgb("#f000"))
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self.assertEqual((0, 255, 0, 0), ImageColor.getrgb("#0f00"))
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self.assertEqual((0, 0, 255, 0), ImageColor.getrgb("#00f0"))
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self.assertEqual((0, 0, 0, 255), ImageColor.getrgb("#000f"))
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# long 3 components
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self.assertEqual((222, 0, 0), ImageColor.getrgb("#de0000"))
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self.assertEqual((0, 222, 0), ImageColor.getrgb("#00de00"))
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self.assertEqual((0, 0, 222), ImageColor.getrgb("#0000de"))
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# long 4 components
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self.assertEqual((222, 0, 0, 0), ImageColor.getrgb("#de000000"))
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self.assertEqual((0, 222, 0, 0), ImageColor.getrgb("#00de0000"))
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self.assertEqual((0, 0, 222, 0), ImageColor.getrgb("#0000de00"))
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self.assertEqual((0, 0, 0, 222), ImageColor.getrgb("#000000de"))
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# case insensitivity
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self.assertEqual(ImageColor.getrgb("#DEF"), ImageColor.getrgb("#def"))
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self.assertEqual(ImageColor.getrgb("#CDEF"), ImageColor.getrgb("#cdef"))
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self.assertEqual(ImageColor.getrgb("#DEFDEF"),
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ImageColor.getrgb("#defdef"))
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self.assertEqual(ImageColor.getrgb("#CDEFCDEF"),
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ImageColor.getrgb("#cdefcdef"))
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# not a number
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self.assertRaises(ValueError, ImageColor.getrgb, "#fo0")
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self.assertRaises(ValueError, ImageColor.getrgb, "#fo00")
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self.assertRaises(ValueError, ImageColor.getrgb, "#fo0000")
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self.assertRaises(ValueError, ImageColor.getrgb, "#fo000000")
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# wrong number of components
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self.assertRaises(ValueError, ImageColor.getrgb, "#f0000")
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self.assertRaises(ValueError, ImageColor.getrgb, "#f000000")
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self.assertRaises(ValueError, ImageColor.getrgb, "#f00000000")
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self.assertRaises(ValueError, ImageColor.getrgb, "#f000000000")
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self.assertRaises(ValueError, ImageColor.getrgb, "#f00000 ")
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def test_colormap(self):
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self.assertEqual((0, 0, 0), ImageColor.getrgb("black"))
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self.assertEqual((255, 255, 255), ImageColor.getrgb("white"))
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self.assertEqual((255, 255, 255), ImageColor.getrgb("WHITE"))
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self.assertRaises(ValueError, ImageColor.getrgb, "black ")
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def test_functions(self):
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# rgb numbers
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self.assertEqual((255, 0, 0), ImageColor.getrgb("rgb(255,0,0)"))
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self.assertEqual((0, 255, 0), ImageColor.getrgb("rgb(0,255,0)"))
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self.assertEqual((0, 0, 255), ImageColor.getrgb("rgb(0,0,255)"))
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# percents
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self.assertEqual((255, 0, 0), ImageColor.getrgb("rgb(100%,0%,0%)"))
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self.assertEqual((0, 255, 0), ImageColor.getrgb("rgb(0%,100%,0%)"))
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self.assertEqual((0, 0, 255), ImageColor.getrgb("rgb(0%,0%,100%)"))
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# rgba numbers
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self.assertEqual((255, 0, 0, 0), ImageColor.getrgb("rgba(255,0,0,0)"))
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self.assertEqual((0, 255, 0, 0), ImageColor.getrgb("rgba(0,255,0,0)"))
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self.assertEqual((0, 0, 255, 0), ImageColor.getrgb("rgba(0,0,255,0)"))
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self.assertEqual((0, 0, 0, 255), ImageColor.getrgb("rgba(0,0,0,255)"))
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self.assertEqual((255, 0, 0), ImageColor.getrgb("hsl(0,100%,50%)"))
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self.assertEqual((255, 0, 0), ImageColor.getrgb("hsl(360,100%,50%)"))
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self.assertEqual((0, 255, 255), ImageColor.getrgb("hsl(180,100%,50%)"))
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# case insensitivity
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self.assertEqual(ImageColor.getrgb("RGB(255,0,0)"),
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ImageColor.getrgb("rgb(255,0,0)"))
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self.assertEqual(ImageColor.getrgb("RGB(100%,0%,0%)"),
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ImageColor.getrgb("rgb(100%,0%,0%)"))
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self.assertEqual(ImageColor.getrgb("RGBA(255,0,0,0)"),
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ImageColor.getrgb("rgba(255,0,0,0)"))
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self.assertEqual(ImageColor.getrgb("HSL(0,100%,50%)"),
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ImageColor.getrgb("hsl(0,100%,50%)"))
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# space agnosticism
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self.assertEqual((255, 0, 0),
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ImageColor.getrgb("rgb( 255 , 0 , 0 )"))
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self.assertEqual((255, 0, 0),
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ImageColor.getrgb("rgb( 100% , 0% , 0% )"))
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self.assertEqual((255, 0, 0, 0),
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ImageColor.getrgb("rgba( 255 , 0 , 0 , 0 )"))
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self.assertEqual((255, 0, 0),
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ImageColor.getrgb("hsl( 0 , 100% , 50% )"))
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# wrong number of components
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self.assertRaises(ValueError, ImageColor.getrgb, "rgb(255,0)")
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self.assertRaises(ValueError, ImageColor.getrgb, "rgb(255,0,0,0)")
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self.assertRaises(ValueError, ImageColor.getrgb, "rgb(100%,0%)")
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self.assertRaises(ValueError, ImageColor.getrgb, "rgb(100%,0%,0)")
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self.assertRaises(ValueError, ImageColor.getrgb, "rgb(100%,0%,0 %)")
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self.assertRaises(ValueError, ImageColor.getrgb, "rgb(100%,0%,0%,0%)")
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self.assertRaises(ValueError, ImageColor.getrgb, "rgba(255,0,0)")
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self.assertRaises(ValueError, ImageColor.getrgb, "rgba(255,0,0,0,0)")
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self.assertRaises(ValueError, ImageColor.getrgb, "hsl(0,100%)")
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self.assertRaises(ValueError, ImageColor.getrgb, "hsl(0,100%,0%,0%)")
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self.assertRaises(ValueError, ImageColor.getrgb, "hsl(0%,100%,50%)")
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self.assertRaises(ValueError, ImageColor.getrgb, "hsl(0,100,50%)")
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self.assertRaises(ValueError, ImageColor.getrgb, "hsl(0,100%,50)")
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# look for rounding errors (based on code by Tim Hatch)
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def test_rounding_errors(self):
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@ -27,11 +122,9 @@ class TestImageColor(PillowTestCase):
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for color in list(ImageColor.colormap.keys()):
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expected = Image.new(
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"RGB", (1, 1), color).convert("L").getpixel((0, 0))
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actual = Image.new("L", (1, 1), color).getpixel((0, 0))
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actual = ImageColor.getcolor(color, 'L')
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self.assertEqual(expected, actual)
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self.assertEqual((0, 0, 0), ImageColor.getcolor("black", "RGB"))
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self.assertEqual((255, 255, 255), ImageColor.getcolor("white", "RGB"))
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self.assertEqual(
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(0, 255, 115), ImageColor.getcolor("rgba(0, 255, 115, 33)", "RGB"))
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Image.new("RGB", (1, 1), "white")
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