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<?php
/*
* @package Joomla 1.5
* @copyright Copyright (C) 2005 Open Source Matters. All rights reserved.
* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL, see LICENSE.php
*
* @component Phoca Favicon
* @copyright Copyright (C) Jan Pavelka www.phoca.cz
* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL
*/
jimport( 'joomla.application.component.controller' );
jimport( 'joomla.filesystem.folder' );
jimport( 'joomla.filesystem.file' );
class PhocaFaviconIcoHelper
{
//------------------------------------------------------------------------------------------
// createIcoFile
//------------------------------------------------------------------------------------------
function createIcoFile($file_thumbnail, $file_favicon)
{
list($w, $h, $type) = GetImageSize($file_thumbnail);
switch($type)
{
case IMAGETYPE_JPEG: $imgIn = 'ImageCreateFromJPEG'; break;
case IMAGETYPE_PNG : $imgIn = 'ImageCreateFromPNG'; break;
case IMAGETYPE_GIF : $imgIn = 'ImageCreateFromGIF'; break;
case IMAGETYPE_WBMP: $imgIn = 'ImageCreateFromWBMP'; break;
default: return false; break;
}
if (@$image_create_from = $imgIn($file_thumbnail))
{
$images_create_from = array($image_create_from);
$icon_data = PhocaFaviconIcoHelper::GD2ICOstring($images_create_from);
ImageDestroy($image_create_from); // free memory
return $icon_data;
}
}
//------------------------------------------------------------------------------------------
// GD2ICOstring
// phpThumb() by James Heinrich <info@silisoftware.com> available at http://phpthumb.sourceforge.net
// phpThumb() is licensed under the "GNU Public License" (GPL) and/or the "phpThumb() Commercial License" (pTCL).
// http://phpthumb.sourceforge.net/demo/docs/phpthumb.license.txt
//------------------------------------------------------------------------------------------
function GD2ICOstring(&$gd_image_array)
{
foreach ($gd_image_array as $key => $gd_image)
{
$ImageWidths[$key] = ImageSX($gd_image);
$ImageHeights[$key] = ImageSY($gd_image);
$bpp[$key] = ImageIsTrueColor($gd_image) ? 32 : 24;
$totalcolors[$key] = ImageColorsTotal($gd_image);
$icXOR[$key] = '';
for ($y = $ImageHeights[$key] - 1; $y >= 0; $y--)
{
for ($x = 0; $x < $ImageWidths[$key]; $x++)
{
$argb = PhocaFaviconIcoHelper::GetPixelColor($gd_image, $x, $y);
$a = round(255 * ((127 - $argb['alpha']) / 127));
$r = $argb['red'];
$g = $argb['green'];
$b = $argb['blue'];
if ($bpp[$key] == 32) {
$icXOR[$key] .= chr($b).chr($g).chr($r).chr($a);
} elseif ($bpp[$key] == 24) {
$icXOR[$key] .= chr($b).chr($g).chr($r);
}
if ($a < 128) {
@$icANDmask[$key][$y] .= '1';
} else {
@$icANDmask[$key][$y] .= '0';
}
}
// mask bits are 32-bit aligned per scanline
while (strlen($icANDmask[$key][$y]) % 32) {
$icANDmask[$key][$y] .= '0';
}
}
$icAND[$key] = '';
foreach ($icANDmask[$key] as $y => $scanlinemaskbits)
{
for ($i = 0; $i < strlen($scanlinemaskbits); $i += 8)
{
$icAND[$key] .= chr(bindec(str_pad(substr($scanlinemaskbits, $i, 8), 8, '0', STR_PAD_LEFT)));
}
}
}
foreach ($gd_image_array as $key => $gd_image)
{
$biSizeImage = $ImageWidths[$key] * $ImageHeights[$key] * ($bpp[$key] / 8);
// BITMAPINFOHEADER - 40 bytes
$BitmapInfoHeader[$key] = '';
$BitmapInfoHeader[$key] .= "\x28\x00\x00\x00"; // DWORD biSize;
$BitmapInfoHeader[$key] .= PhocaFaviconIcoHelper::LittleEndian2String($ImageWidths[$key], 4); // LONG biWidth;
// The biHeight member specifies the combined
// height of the XOR and AND masks.
$BitmapInfoHeader[$key] .= PhocaFaviconIcoHelper::LittleEndian2String($ImageHeights[$key] * 2, 4); // LONG biHeight;
$BitmapInfoHeader[$key] .= "\x01\x00"; // WORD biPlanes;
$BitmapInfoHeader[$key] .= chr($bpp[$key])."\x00"; // wBitCount;
$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // DWORD biCompression;
$BitmapInfoHeader[$key] .= PhocaFaviconIcoHelper::LittleEndian2String($biSizeImage, 4); // DWORD biSizeImage;
$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // LONG biXPelsPerMeter;
$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // LONG biYPelsPerMeter;
$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // DWORD biClrUsed;
$BitmapInfoHeader[$key] .= "\x00\x00\x00\x00"; // DWORD biClrImportant;
}
$icondata = "\x00\x00"; // idReserved; // Reserved (must be 0)
$icondata .= "\x01\x00"; // idType; // Resource Type (1 for icons)
$icondata .= PhocaFaviconIcoHelper::LittleEndian2String(count($gd_image_array), 2); // idCount; // How many images?
$dwImageOffset = 6 + (count($gd_image_array) * 16);
foreach ($gd_image_array as $key => $gd_image) {
// ICONDIRENTRY idEntries[1]; // An entry for each image (idCount of 'em)
$icondata .= chr($ImageWidths[$key]); // bWidth; // Width, in pixels, of the image
$icondata .= chr($ImageHeights[$key]); // bHeight; // Height, in pixels, of the image
$icondata .= chr($totalcolors[$key]); // bColorCount; // Number of colors in image (0 if >=8bpp)
$icondata .= "\x00"; // bReserved; // Reserved ( must be 0)
$icondata .= "\x01\x00"; // wPlanes; // Color Planes
$icondata .= chr($bpp[$key])."\x00"; // wBitCount; // Bits per pixel
$dwBytesInRes = 40 + strlen($icXOR[$key]) + strlen($icAND[$key]);
$icondata .= PhocaFaviconIcoHelper::LittleEndian2String($dwBytesInRes, 4); // dwBytesInRes; // How many bytes in this resource?
$icondata .= PhocaFaviconIcoHelper::LittleEndian2String($dwImageOffset, 4); // dwImageOffset; // Where in the file is this image?
$dwImageOffset += strlen($BitmapInfoHeader[$key]);
$dwImageOffset += strlen($icXOR[$key]);
$dwImageOffset += strlen($icAND[$key]);
}
foreach ($gd_image_array as $key => $gd_image) {
$icondata .= $BitmapInfoHeader[$key];
$icondata .= $icXOR[$key];
$icondata .= $icAND[$key];
}
return $icondata;
}
//------------------------------------------------------------------------------------------
// GetPixelColor
//------------------------------------------------------------------------------------------
function GetPixelColor(&$img, $x, $y)
{
if (!is_resource($img))
{
return false;
}
return @ImageColorsForIndex($img, @ImageColorAt($img, $x, $y));
}
//------------------------------------------------------------------------------------------
// LittleEndian2String
//------------------------------------------------------------------------------------------
function LittleEndian2String($number, $minbytes=1)
{
$intstring = '';
while ($number > 0)
{
$intstring = $intstring.chr($number & 255);
$number >>= 8;
}
return str_pad($intstring, $minbytes, "\x00", STR_PAD_RIGHT);
}
}