First commit

PointlessImageToCssConverter.php

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+<?php
+/*
+    Pointless Image to CSS box-shadow Converter
+    Copyright (c) 2012, Jay Salvat
+    http://jaysalvat.com
+
+    DoWhateverYouWantWithIt-ButDontAbuse License.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
+    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
+    OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+Class PointlessImageToCssConverter {    
+    private $path;
+    private $type;
+    private $width;
+    private $blur;
+    private $color_type;
+    private $pixel_size;
+    private $image;
+
+    CONST HEXA = 0;
+    CONST RGBA = 2;
+
+    public function __construct($filename) {
+        $this->setPath($filename);
+        $this->setColorType(PointlessImageToCssConverter::HEXA);
+        $this->setWidth(100);
+        $this->setPixelSize(8);
+        $this->setBlur(0);
+    }
+
+    public function setColorType($type) {
+        if ($type !== PointlessImageToCssConverter::HEXA 
+         && $type !== PointlessImageToCssConverter::RGBA) {
+            throw new Exception('Color type not allowed.');
+        }
+        $this->color_type = $type;
+    }
+
+    public function getColorType() {
+        return $this->color_type;
+    }
+
+    public function setWidth($width) {
+        $this->width = $width;
+    }
+
+    public function getWidth() {
+        return $this->width;
+    }
+
+    public function setPath($path) {
+        $this->path = $path;
+    }
+
+    public function getPath() {
+        return $this->path;
+    }
+
+    public function setBlur($blur) {
+        $this->blur = $blur;
+    }
+
+    public function getBlur() {
+        return $this->blur;
+    }
+
+    public function setPixelSize($size) {
+        $this->pixel_size = $size;
+    }
+
+    public function getPixelSize() {
+        return $this->pixel_size;
+    }
+
+    public function load($filename) {
+        $image_info = @getimagesize($filename);
+
+        if ($image_info) {
+            $this->type = $image_info[2];
+
+            switch ($this->type) {
+                case IMAGETYPE_JPEG:
+                    $this->image = imagecreatefromjpeg($filename);
+                break;
+                case IMAGETYPE_PNG:
+                    $this->image = imagecreatefrompng($filename);
+                break;
+                default:
+                    throw new Exception('Image Type not allowed.');
+            }
+        } else {
+            throw new Exception('The file must be a valid image.');
+        }
+    }
+
+    public function getImageWidth() {
+        return imagesx($this->image);
+    }
+
+    public function getImageHeight() {
+        return imagesy($this->image);
+    }
+
+    public function resize($width) {
+        $ratio  = $width / $this->getImageWidth();
+        $height = $this->getImageHeight() * $ratio;
+
+        $new_image = imagecreatetruecolor($width, $height);
+        imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getImageWidth(), $this->getImageHeight());
+        $this->image = $new_image;
+    }
+
+    public function getColorMap() {
+        $colors = array();
+        $iw = $this->getImageWidth();
+        $ih = $this->getImageHeight();
+        for($h = 0; $h < $ih; $h++) {
+            $colors[$h] = array();
+            for($w = 0; $w < $iw; $w++) {
+                $a = imagecolorat($this->image, $w, $h);
+                $b = imagecolorsforindex($this->image, $a);
+                $colors[$h][$w] = $b;
+            }
+        }
+        return $colors;
+    }
+
+    public function computeStyle() {
+        $this->load($this->getPath());
+        $this->resize($this->getWidth());
+
+        $nb = $this->getImageWidth() * $this->getImageHeight();
+        $step = $this->getPixelSize();
+        $pixels = $this->getColorMap();
+
+        $style  = "    width:0;\n";
+        $style .= "    height:0;\n";
+        $style .= "    box-shadow:\n";
+        foreach($pixels as $row => $cols) {
+            $style .= "\n";
+            foreach($cols as $col => $colors) {
+                $style .= '   ';
+                $style .= sprintf("%4s", $col * $step)."px ";
+                $style .= sprintf("%2s", $row * $step)."px ";
+                $style .= $this->getBlur() ? $this->getBlur()."px " : "0 ";
+                $style .= $step."px ";
+
+                if ($this->color_type === PointlessImageToCssConverter::RGBA) {
+                    $style .= "rgba(".$colors["red"].",".$colors["green"].",".$colors["blue"].",".$colors["alpha"].")";
+                } else {
+                    $style .= strtoupper(
+                        '#'.
+                        $this->rgb2hexa($colors['red']).
+                        $this->rgb2hexa($colors['green']).
+                        $this->rgb2hexa($colors['blue'])
+                    );
+                }
+                $style .=",\n";
+            }
+        }
+        return preg_replace('/,$/', ';', $style);
+    }
+
+    public function __toString() {
+        return $this->computeStyle();
+    }
+
+    private function rgb2hexa($value) {
+        return str_pad(dechex($value), 2, '0', STR_PAD_LEFT);
+    }
+}

index.php

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+
+<!doctype html>
+<html>
+<head>
+<style>
+#monalisa {
+<?php
+    include 'PointlessImageToCssConverter.php';
+
+    $img = new PointlessImageToCssConverter("monalisa.jpg");
+    $img->setWidth(200);
+    $img->setPixelSize(4);
+    $img->setBlur(4);
+
+    echo $img->computeStyle();
+?>
+}
+</style>
+</head>
+<body>
+    <div id="monalisa" />
+</body>
+</html>