nano-color - npm Package Compare versions

Comparing version 1.0.1 to 1.0.2

index.js

@@ -9,11 +9,17 @@ "use strict";
 
+var c = 10000, inv = 10000,
+    hsv_lut = [],
+    rgb_lut = [];
+
 /* --- value to byte ------------------------------------------------------------------------------------ */
-var v2b/* = function _v2b(v) {
-	return Math.pow(v, 1/hsv_gamma) * 255 + .5 | 0;
-}*/;
+// Math.pow(v, 1/hsv_gamma) * 255 + .5 | 0;
+var v2b = function _v2b(v) {
+	return hsv_lut[(v*c+.5)>>0];
+};
 
 /* --- byte to value ------------------------------------------------------------------------------------ */
-var b2v/* = function _b2v(v) {
-	return Math.pow(v/255, hsv_gamma);
-}*/;
+// Math.pow(v/255, hsv_gamma);
+var b2v = function _b2v(v) {
+	return rgb_lut[v/255*inv+.5|0];
+};
 
@@ -28,6 +34,2 @@ /* --------------------------------------------------------------------------------------- */
 
-	var c = 30000, inv = 30000,
-	    hsv_lut = [],
-	    rgb_lut = [];
-
 	for (var i = 0; i <= c; ++i)
@@ -38,10 +40,2 @@ hsv_lut[i] = Math.pow(i/c, gamma) * 255 + .5 | 0;
 		rgb_lut[i] = Math.pow(i/inv, g);
-
-	v2b = function (v) {
-		return hsv_lut[(v*c+.5)>>0];
-	}
-
-	b2v = function (v) {
-		return rgb_lut[v/255*inv+.5|0];
-	}
 };
@@ -48,0 +42,0 @@

package.json

 {
   "name": "nano-color",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "",
@@ -5,0 +5,0 @@ "keywords" : [ "HSV", "RGB", "RGBA", "hsv-filter", "coloring-filter", "gradient" ],

README.md

@@ -13,3 +13,122 @@ # nano-color
 
+## Functions
 
+### Common parameter names
+
+* R,G,B,A -- integer channel value (0..255);
+* h -- hue value (0..359);
+* s,v,a -- saturation, volume, alpha value (0..1);
+* g -- gamma value;
+* RGB -- [ R, G, B ];
+* RGBA -- [ R, G, B, A ];
+* IRGBA -- 0xRRGGBBAA;
+* IRGB -- 0xRRGGBB;
+* data -- array of bytes;
+* addr -- offset in an array of bytes.
+
+### setGamma(g)
+
+set Gamma correction value
+
+### rgb2hsv(R,G,B)
+
+Converts RGB to HSV. Returns array [ h, s, v ].
+
+### hsv2rgb(h,s,v)
+
+Returns [ R, G, B ].
+
+### hsva2rgba(h,s,v,a)
+Returns [ R, G, B, A ].
+
+### rgba2hsva(R,G,B,A)
+
+Returns [ h, s, v, a ].
+
+### rgb2hex(RGB)
+
+Return CSS hex color string -- '#RRGGBB'.
+
+### rgba2hex(RGBA)
+
+Return SVN hex color string -- '#RRGGBBAA'.
+
+### hex2rgb(h)
+
+Returns [ R, G, B ]. Eats '#RGB', '#RGBA', '#RRGGBB' and '#RRGGBBAA' formats.
+
+### hex2rgba(hex)
+
+Returns [ R, G, B, A ]. Eats '#RGB', '#RGBA', '#RRGGBB' and '#RRGGBBAA' formats.
+
+### rgb2array(IRGB)
+
+Returns [ R, G, B ].
+
+### rgba2array(IRGBA)
+
+Returns [ R, G, B, A ].
+
+### hsva2irgba(h,s,v,a)
+
+Returns 0xRRGGBBAA.
+
+### put_rgb(data, addr, RGBA)
+
+Put or mix in RGBA to the RGB bitmap array (data).
+
+### put_rgba(data, addr, RGBA)
+
+Put or mix in RGBA to the RGBA bitmap array (data).
+
+### hsv_filter(data, addr, h, s, v)
+
+Applyes HSV filter to the bitmap pixel.
+
+### colorify_filter(data, addr, h, s, v)
+
+Applyes Colorify filter to the bitmap pixel.
+
+There are special case for v < 0. A result volume will be calculated by the formula ```(.21*r + .72*g + .07*b) * -val```.
+
+### gradient(first_pos, last_pos, stops, fn)
+
+* {stops} -- Object with color stops like:
+
+```
+{ 0: '#000', 4000: '#1234', 6000: 0x33445566, 10000: [ 255, 255, 255, 255 ] }
+```
+where, keys of object should be numeric value in bounds between 0 and 10000, that means from 0 to 1.0.
+
+* {fn(position, RGBA)} -- callback function 
+
+Example:
+```
+> var c = require('nano-color');
+c.gradient(0, 10, {
+		0: '#000',
+		4000: '#1234',
+		6000: 0x33445566,
+		10000: [ 255, 255, 255, 255 ]
+	}, function (pos, RGBA) {
+		console.log('%s: [ %s ]', pos, RGBA.join(', '));
+	});
+```
+will produce console output:
+```
+0: [ 0, 0, 0, 255 ]
+1: [ 4, 9, 13, 208 ]
+2: [ 9, 17, 26, 162 ]
+3: [ 13, 26, 38, 115 ]
+4: [ 17, 34, 51, 68 ]
+4: [ 17, 34, 51, 68 ]
+5: [ 34, 51, 68, 85 ]
+6: [ 51, 68, 85, 102 ]
+6: [ 51, 68, 85, 102 ]
+7: [ 102, 115, 128, 140 ]
+8: [ 153, 162, 170, 179 ]
+9: [ 204, 208, 213, 217 ]
+10: [ 255, 255, 255, 255 ]
+```
+
 [gitter-image]: https://badges.gitter.im/Holixus/nano-color.png
@@ -16,0 +135,0 @@ [gitter-url]: https://gitter.im/Holixus/nano-color

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Improved metrics

Total package byte prevSize

27775

increased by9.19%

Number of lines in readme file

156

increased by321.62%

Worsened metrics

Lines of code

654

decreased by-0.61%

No dependency changes