Example #1
0
function create_image($file_name, $base = '', $height = '', $percent = '', $width = '', $direction = '', $numcolors = '', $color1 = '', $color2 = '')
{
    global $DEFAULTS, $MAX_COLORS, $MAX_HEIGHT, $MAX_WIDTH, $MIN_COLORS;
    if ($base != '') {
        $color1 = $color2 = $base;
    }
    $color1 = $color1 == '' ? colorToRGB($DEFAULTS['color1']) : (preg_match("/^#?([0-9a-fA-F]{3,6})/", $color1, $matches) ? colorToRGB($matches[1]) : colorToRGB($DEFAULTS['color1']));
    $color2 = $color2 == '' ? colorToRGB($DEFAULTS['color2']) : (preg_match("/^#?([0-9a-fA-F]{3,6})/", $color2, $matches) ? colorToRGB($matches[1]) : colorToRGB($DEFAULTS['color2']));
    if (empty($height)) {
        $height = $DEFAULTS['height'];
    }
    if ($height > $MAX_HEIGHT) {
        $height = $MAX_HEIGHT;
    }
    if ($direction == '' || $direction % 90 != 0) {
        $direction = $DEFAULTS['direction'];
    } else {
        while ($direction > 360) {
            $direction -= 360;
        }
    }
    if ($direction == 90 || $direction == 270) {
        // Vertical gradient
        if (empty($height)) {
            $height = $DEFAULTS['height'];
        }
        if ($height > $MAX_HEIGHT) {
            $height = $MAX_HEIGHT;
        }
        $width = 1;
    } else {
        // Horizontal gradient
        if (empty($width)) {
            $width = $DEFAULTS['width'];
        }
        if ($width > $MAX_WIDTH) {
            $width = $MAX_WIDTH;
        }
        $height = 1;
    }
    if (empty($numcolors)) {
        $numcolors = $DEFAULTS['colors'];
    } else {
        if (preg_match('/^\\d+$/', $numcolors)) {
            if ($numcolors < $MIN_COLORS) {
                $numcolors = $MIN_COLORS;
            } else {
                if ($numcolors > $MAX_COLORS) {
                    $numcolors = $MAX_COLORS;
                }
            }
        } else {
            $numcolors = $DEFAULTS['colors'];
        }
    }
    if ($percent == '' || $percent < 0 || $percent > 100) {
        $percent = $DEFAULTS['percent'];
    }
    $percent *= 2.55;
    $color2['red'] = min($color2['red'] + $percent, 255);
    $color2['green'] = min($color2['green'] + $percent, 255);
    $color2['blue'] = min($color2['blue'] + $percent, 255);
    $image = imagecreate($width, $height);
    // Allocate array of colors
    $colors = array();
    $deltared = $color2['red'] - $color1['red'];
    $deltagreen = $color2['green'] - $color1['green'];
    $deltablue = $color2['blue'] - $color1['blue'];
    $tmp_c = $numcolors - 1;
    for ($i = 0; $i < $numcolors; $i++) {
        $thisred = floor(min($color1['red'] + $deltared * $i / $tmp_c, 255));
        $thisgreen = floor(min($color1['green'] + $deltagreen * $i / $tmp_c, 255));
        $thisblue = floor(min($color1['blue'] + $deltablue * $i / $tmp_c, 255));
        $colors[$i] = imagecolorallocate($image, $thisred, $thisgreen, $thisblue);
    }
    $dim = $width;
    $dx = $dy = $i = $x1 = $y1 = 0;
    $x2 = $width - 1;
    $y2 = $height - 1;
    switch ($direction) {
        case 0:
            $dx = 1;
            $x2 = 0;
            break;
        case 90:
            $dim = $height;
            $dy = -1;
            $y1 = $height - 1;
            break;
        case 180:
            $dx = -1;
            $x1 = $width - 1;
            break;
        case 270:
            $dim = $height;
            $dy = 1;
            $y2 = 0;
            break;
    }
    while ($x1 >= 0 && $x1 < $width && $x2 >= 0 && $x2 < $width && $y1 >= 0 && $y1 < $height && $y2 >= 0 && $y2 < $height) {
        // Which color for this line?
        $ind = floor($numcolors * $i / $dim);
        if ($ind >= $numcolors) {
            $ind = $numcolors;
        }
        imageline($image, $x1, $y1, $x2, $y2, $colors[$ind]);
        $x1 += $dx;
        $y1 += $dy;
        $x2 += $dx;
        $y2 += $dy;
        $i++;
    }
    if (function_exists('imagepng')) {
        if ($file_name == '') {
            header('Content-type: image/png');
            imagepng($image);
        } else {
            imagepng($image, $file_name);
        }
    } elseif (function_exists('imagegif')) {
        if ($file_name == '') {
            header('Content-type: image/gif');
            imagegif($image);
        } else {
            imagegif($image, $file_name);
        }
    } else {
        echo 'No image formats supported!<br />' . "\n";
    }
    imagedestroy($image);
    return;
}
Example #2
0
} else {
    if (preg_match("/^#?([0-9a-fA-F]{3,6})/", $color1, $matches)) {
        $color1 = colorToRGB($matches[1]);
    } else {
        $color1 = colorToRGB($DEFAULTS['color1']);
    }
}
if ($base === null) {
    $color2 = getGetValue('color2');
    if ($color2 === null) {
        $color2 = colorToRGB($DEFAULTS['color2']);
    } else {
        if (preg_match("/^#?([0-9a-fA-F]{3,6})/", $color2, $matches)) {
            $color2 = colorToRGB($matches[1]);
        } else {
            $color2 = colorToRGB($DEFAULTS['color2']);
        }
    }
} else {
    $color2 = $color1;
    $percent = getGetValue('percent');
    if ($percent === null || $percent < 0 || $percent > 100) {
        $percent = $DEFAULTS['percent'];
    }
    $color2['red'] = min($color2['red'] + $percent * 255 / 100, 255);
    $color2['green'] = min($color2['green'] + $percent * 255 / 100, 255);
    $color2['blue'] = min($color2['blue'] + $percent * 255 / 100, 255);
}
$image = imagecreate($width, $height);
// Allocate array of colors
$colors = array();