Добавление начальных файлов

Intervention/Image/AbstractColor.php

@@ -0,0 +1,226 @@
+<?php
+
+namespace Intervention\Image;
+
+abstract class AbstractColor
+{
+    /**
+     * Initiates color object from integer
+     *
+     * @param  int $value
+     * @return \Intervention\Image\AbstractColor
+     */
+    abstract public function initFromInteger($value);
+
+    /**
+     * Initiates color object from given array
+     *
+     * @param  array $value
+     * @return \Intervention\Image\AbstractColor
+     */
+    abstract public function initFromArray($value);
+
+    /**
+     * Initiates color object from given string
+     *
+     * @param  string $value
+     * @return \Intervention\Image\AbstractColor
+     */
+    abstract public function initFromString($value);
+
+    /**
+     * Initiates color object from given ImagickPixel object
+     *
+     * @param  ImagickPixel $value
+     * @return \Intervention\Image\AbstractColor
+     */
+    abstract public function initFromObject($value);
+
+    /**
+     * Initiates color object from given R, G and B values
+     *
+     * @param  int $r
+     * @param  int $g
+     * @param  int $b
+     * @return \Intervention\Image\AbstractColor
+     */
+    abstract public function initFromRgb($r, $g, $b);
+
+    /**
+     * Initiates color object from given R, G, B and A values
+     *
+     * @param  int $r
+     * @param  int $g
+     * @param  int $b
+     * @param  float   $a
+     * @return \Intervention\Image\AbstractColor
+     */
+    abstract public function initFromRgba($r, $g, $b, $a);
+
+    /**
+     * Calculates integer value of current color instance
+     *
+     * @return int
+     */
+    abstract public function getInt();
+
+    /**
+     * Calculates hexadecimal value of current color instance
+     *
+     * @param  string $prefix
+     * @return string
+     */
+    abstract public function getHex($prefix);
+
+    /**
+     * Calculates RGB(A) in array format of current color instance
+     *
+     * @return array
+     */
+    abstract public function getArray();
+
+    /**
+     * Calculates RGBA in string format of current color instance
+     *
+     * @return string
+     */
+    abstract public function getRgba();
+
+    /**
+     * Determines if current color is different from given color
+     *
+     * @param  AbstractColor $color
+     * @param  int           $tolerance
+     * @return boolean
+     */
+    abstract public function differs(AbstractColor $color, $tolerance = 0);
+
+    /**
+     * Creates new instance
+     *
+     * @param mixed $value
+     */
+    public function __construct($value = null)
+    {
+        $this->parse($value);
+    }
+
+    /**
+     * Parses given value as color
+     *
+     * @param  mixed $value
+     * @return \Intervention\Image\AbstractColor
+     */
+    public function parse($value)
+    {
+        switch (true) {
+
+            case is_string($value):
+                $this->initFromString($value);
+                break;
+
+            case is_int($value):
+                $this->initFromInteger($value);
+                break;
+
+            case is_array($value):
+                $this->initFromArray($value);
+                break;
+
+            case is_object($value):
+                $this->initFromObject($value);
+                break;
+
+            case is_null($value):
+                $this->initFromArray([255, 255, 255, 0]);
+                break;
+
+            default:
+                throw new \Intervention\Image\Exception\NotReadableException(
+                    "Color format ({$value}) cannot be read."
+                );
+        }
+
+        return $this;
+    }
+
+    /**
+     * Formats current color instance into given format
+     *
+     * @param  string $type
+     * @return mixed
+     */
+    public function format($type)
+    {
+        switch (strtolower($type)) {
+
+            case 'rgba':
+                return $this->getRgba();
+
+            case 'hex':
+                return $this->getHex('#');
+
+            case 'int':
+            case 'integer':
+                return $this->getInt();
+
+            case 'array':
+                return $this->getArray();
+
+            case 'obj':
+            case 'object':
+                return $this;
+
+            default:
+                throw new \Intervention\Image\Exception\NotSupportedException(
+                    "Color format ({$type}) is not supported."
+                );
+        }
+    }
+
+    /**
+     * Reads RGBA values from string into array
+     *
+     * @param  string $value
+     * @return array
+     */
+    protected function rgbaFromString($value)
+    {
+        $result = false;
+
+        // parse color string in hexidecimal format like #cccccc or cccccc or ccc
+        $hexPattern = '/^#?([a-f0-9]{1,2})([a-f0-9]{1,2})([a-f0-9]{1,2})$/i';
+
+        // parse color string in format rgb(140, 140, 140)
+        $rgbPattern = '/^rgb ?\(([0-9]{1,3}), ?([0-9]{1,3}), ?([0-9]{1,3})\)$/i';
+
+        // parse color string in format rgba(255, 0, 0, 0.5)
+        $rgbaPattern = '/^rgba ?\(([0-9]{1,3}), ?([0-9]{1,3}), ?([0-9]{1,3}), ?([0-9.]{1,4})\)$/i';
+
+        if (preg_match($hexPattern, $value, $matches)) {
+            $result = [];
+            $result[0] = strlen($matches[1]) == '1' ? hexdec($matches[1].$matches[1]) : hexdec($matches[1]);
+            $result[1] = strlen($matches[2]) == '1' ? hexdec($matches[2].$matches[2]) : hexdec($matches[2]);
+            $result[2] = strlen($matches[3]) == '1' ? hexdec($matches[3].$matches[3]) : hexdec($matches[3]);
+            $result[3] = 1;
+        } elseif (preg_match($rgbPattern, $value, $matches)) {
+            $result = [];
+            $result[0] = ($matches[1] >= 0 && $matches[1] <= 255) ? intval($matches[1]) : 0;
+            $result[1] = ($matches[2] >= 0 && $matches[2] <= 255) ? intval($matches[2]) : 0;
+            $result[2] = ($matches[3] >= 0 && $matches[3] <= 255) ? intval($matches[3]) : 0;
+            $result[3] = 1;
+        } elseif (preg_match($rgbaPattern, $value, $matches)) {
+            $result = [];
+            $result[0] = ($matches[1] >= 0 && $matches[1] <= 255) ? intval($matches[1]) : 0;
+            $result[1] = ($matches[2] >= 0 && $matches[2] <= 255) ? intval($matches[2]) : 0;
+            $result[2] = ($matches[3] >= 0 && $matches[3] <= 255) ? intval($matches[3]) : 0;
+            $result[3] = ($matches[4] >= 0 && $matches[4] <= 1) ? $matches[4] : 0;
+        } else {
+            throw new \Intervention\Image\Exception\NotReadableException(
+                "Unable to read color ({$value})."
+            );
+        }
+
+        return $result;
+    }
+}