--- /dev/null
+<?php
+/***************************************************************************
+ * Original floIcon copyright (C) 2007 by Joshua Hatfield. *
+ * *
+ * In order to use any part of this floIcon Class, you must comply with *
+ * the license in 'license.doc'. In particular, you may not remove this *
+ * copyright notice. *
+ * *
+ * Much time and thought has gone into this software and you are *
+ * benefitting. We hope that you share your changes too. What goes *
+ * around, comes around. *
+ ***************************************************************************
+
+Version 1.1.1:
+Date: 2009-03-16
+
+Changes:
+I was a little hasty on that last update. A couple new bugs from 1.1.0 have
+been fixed.
+
+Version 1.1.0:
+Date: 2009-03-16
+
+Changes:
+Added Vista support.
+Fixed a number of minor bugs. Many thanks to Dvir Berebi for pointing
+ them out.
+
+Version 1.0.5:
+Date: 2009-03-15
+
+Changes:
+Fixed bug when operating on low bit count images (1 or 4) with odd dimensions.
+
+Version 1.0.4:
+Date: 2007-05-25
+
+Changes:
+Made function not break quite so bad when reading a PNG file on a Vista icon.
+ Now, you shouldn't be loading Vista icons anyways, but since I'm trying to
+ upgrade to Vista compatible and I need a comparison, I've got to.
+
+Version 1.0.3:
+Date: 2007-05-25
+
+Changes:
+Okay, this one was just stupid. When adding large image support, I messed up
+ and when reading, it doubled the image size. Now, it's fixed.
+I took the opportunity to also add a dummy AND map for 32 images on those
+ readers who might be looking for it (though it's not supposed to be used.)
+
+Version 1.0.2:
+Date: 2007-05-24
+
+Sorry about two versions so quickly back to back, but something needed to be
+done with speed...things were getting too slow. I'm sure you'll be okay.
+
+Changes:
+Told palette determination to stop at 257 colors or is 32 bit because the
+ palette is not used at that point and gets really slow when it starts
+ getting into the high numbers, for instance, in photographs or gradient
+ truecolor images with lots of unique colors.
+After experimenting, it appears that Windows XP does in fact support 256x256
+ images and larger by setting the entry value to 0 in the 1 byte that holds
+ that value and storing the true dimentions in the image header later. Of
+ course, it still doesn't use these images in normal operation. XP will
+ resize these and use them if no other images are available.
+Wrapped main documentation (this) to the 80th column for easier reading.
+
+Version 1.0.1:
+Date: 2007-05-23
+
+Thank you everyone for actively using the implementation on my site and
+illuminating me very quickly to a number of glaring bugs in this class.
+
+Changes:
+Added version history.
+Fixed bug with non-standard sizes in AND map reading AND writing.
+Fixed bug with palette images using non-black color in backgrounds.
+Fixed bug with height/width reversal reading files.
+
+
+Version 1.0.0:
+Date: 2007-05-17
+Original release date.
+
+
+Foreword:
+If you are simply in the effort of making an ICO file, may I recommend visiting
+my site, http://www.flobi.com/ , and clicking on floIcon. I have a fully
+functional implementation (on which the sample.php is based) where you can also
+see recent icons submitted by other visitors. No registration required, no
+intrusive ads. (As of this writing, there aren't actually any ads at all, I
+might add google ads at some point.)
+
+If you are trying to get an idea of how ICO files, work, may I recommend the
+page I used, http://www.daubnet.com/formats/ICO.html . It does not fully cover
+icon files, but it does a very good job of what it does. Any additional
+information, I will try to post at
+http://www.flobi.com/test/floIcon/more_on_icons.php for your convenience.
+
+If you are trying to get an idea of how image resource files work, I recommend
+ANY other class that deals with images. This class essentially plots points on
+the image, and that's not perticularly advanced.
+
+For any purpose, I wish you luck and feel free to contact me with any bugs,
+comments, questions, etc. - Flobi
+
+Summary:
+This class parses ICO files. It reads directly from the ICO file, headers
+first, so that if you are only retrieving 1 image, the entire ICO file need not
+be parsed. It supports merging ICO files. It supports adding PHP image
+resources as new images to the file. It has an export capability that can
+easily be written to a new (or the same) ICO file for saving ICO files. All
+sizes from 1x1 to 255x255 pixels and 1, 4, 8, 24 (plus transparency) and 32 bit
+images are supported. Image retrieval by size is supported.
+
+Included is a fully functional sample that allows users to upload ICO, GIF,
+JPEG and PNG files into a session icon file as well as remove images from the
+file and download the completed file (sample.php).
+
+Known Limitations: Does not support Vista icons. Does not support inversion
+palette method (because of the limitations of the PHP image resource).
+
+Addendum on Limitations:
+Windows Vista has added support for 256x256 size icons and now stores files as
+PNG's. This class is for older ICO files. A new class is currently under
+development that supports the new Windows Vista format.
+
+Palette inversion (my name for this technique) is the technique of using a black
+pixel (0, 0, 0) with a 1 "AND" pixel. White pixels with a 1 "AND" show
+transparent (or "don't" show). Black pixels with a 1 "AND" show inverted
+(sometimes). Because this method isn't uniformly supported or documented and
+the PHP image resource doesn't support it, I have decided to not as well. This
+does not apply to 32 bit images which include alpha transparency and no AND map.
+
+Though other functions exist, these are the only ones I believe offer usefulness
+to be public.
+floIcon public functions:
+ readICO($file, $offset = 0)
+ Loads the icon from the specified filepath ($file) starting at the
+ specified file offset ($offset). This function MERGES the loaded icon
+ images into the floIcon object.
+
+ formatICO($offset = 0)
+ Returns the current floIcon object formatted as an .ICO file with the
+ file offset altered by $offset. If there are too many or too large
+ images, causing any images saved past the 4,294,967,296th byte, this
+ will return false. (This is well outside PHP's default memory
+ allocation.)
+
+ addImage($imageResource, $desiredBitCount = 1, $pngIfWidthExceeds = 48)
+ Adds an icon image to the icon file based on the passed image resource
+ ($imageResource). It will automatically determine the bit count, but
+ can be persuaded to increase that to $desiredBitCount if that value is
+ greater than the determined bit count.
+
+ NOTE: The image resource is saved by REFERRENCE. So, if you edit it
+ then call getImage, the resource returned will be the same, editions and
+ all. Destruction of the resource will cause a new resource to be
+ created in getImage().
+
+ getImage($offset)
+ Returns the php image resource either assigned by addImage or created
+ dynamically at calltime by the data loaded with readICO(). The offset
+ specified here ($offset) is the array offset starting at 0 and ending
+ at countImages().
+
+ getBestImage($height = 32, $width = 32)
+ Returns the php images resource of the highest quality image closest to
+ the size specified. This could be useful when you only want to display
+ the icon in an icon list with a single representative icon. A resized
+ copy of the highest quality available image will be returned if there is
+ no 32 or 24 bit icon present at the speficied dimentions.
+
+ sortImagesBySize()
+ Sorts the $this->images array by order of size, smallest to largest.
+ This is the optimal sorting for icon files.
+
+ countImages()
+ Returns a count of how many images are present in the current floIcon
+ object.
+
+floIcon public variables:
+ $images
+ Contains a numerically indexed array of floIconImage objects.
+ $updated
+ True if an image has been added since load or last formatICO, otherwise
+ false.
+
+floIconImage public functions:
+ getHeader()
+ Returns an associative array containing the information from the ICO
+ image header.
+
+ getEntry()
+ Returns an associative array containing the information from the ICO
+ entry header.
+
+ NOTE: If this icon image was created by php image resource, this may not
+ have accurate information until saving from floIcon with the formatICO()
+ function. Specifically, offset information will be inaccurate.
+
+ getImageResource()
+ Returns a php image resource. Same as floIcon's getImage() function.
+
+ setImageResource($imageResource, $desiredBitCount = 1, $pngIfWidthExceeds = 48)
+ Changes this icon image based on the passed image resource
+ ($imageResource). It will automatically determine the bit count, but can
+ be persuaded to increase that to $desiredBitCount if that value is
+ greater than the determined bit count.
+
+ NOTE: The image resource is saved by REFERRENCE. So, if you edit it
+ then call getImageResource, the resource returned will be the same,
+ editions and all. Destruction of the resource will cause a new resource
+ to be created in getImageResource().
+
+ dealocateResource()
+ This destroys the image resource variable, freeing up memory. The image
+ will automatically be recreated when getImageResource is executed.
+*/
+class floIcon {
+ /*
+ * $images is an associative array of offset integer => floIconImage object
+ */
+ var $images; // Array of floIconImage objects.
+ var $updated = false;
+ function floIcon() {
+ $this->images = array();
+ }
+ function countImages() {
+ return count($this->images);
+ }
+ function getBestImage($height = 32, $width = 32) {
+ $best = false;
+ $bestEntry = array();
+ $secondBest = false;
+ $secondBestEntry = array();
+ foreach ($this->images as $key => $image) {
+ $entry = $image->getEntry();
+ $header = $image->getHeader();
+ if (!@$entry["BitCount"]) {
+ $entry["BitCount"] = $header["BitCount"];
+ }
+ if ($entry["Height"] == $height && $entry["Width"] == $width && $entry["BitCount"] == 32) {
+ return $image->getImageResource();
+ } elseif ($entry["Height"] == $height && $entry["Width"] == $width && $entry["BitCount"] > min(4, @$bestEntry["BitCount"])) {
+ $best = $image;
+ $bestEntry = $entry;
+ } elseif (
+ !$secondBest or
+ $entry["Height"] >= $secondBestEntry["Height"] &&
+ $entry["Width"] >= $secondBestEntry["Width"] &&
+ $secondBestEntry["BitCount"] >= $secondBestEntry["BitCount"] and
+ (
+ $entry["Height"] <= 64 && $entry["Height"] > $secondBestEntry["Height"] and
+ $entry["Height"] > 64 && $entry["Height"] < $secondBestEntry["Height"]
+ ) ||
+ (
+ $entry["Width"] <= 64 && $entry["Width"] > $secondBestEntry["Width"] and
+ $entry["Width"] > 64 && $entry["Width"] < $secondBestEntry["Width"]
+ ) ||
+ $secondBestEntry["BitCount"] > $secondBestEntry["BitCount"]
+ ) {
+ $secondBest = $image;
+ $secondBestEntry = $entry;
+ }
+ }
+ if ($best) {
+ return $best->getImageResource();
+ } elseif ($secondBest) {
+ if ($secondBestEntry["Width"] != $width || $secondBestEntry["Height"] != $height) {
+ $imageResource = $secondBest->getImageResource();
+ $newImageResource = imagecreatetruecolor($width, $height);
+ imagesavealpha($newImageResource, true);
+ imagealphablending($newImageResource, false);
+ imagecopyresampled($newImageResource, $imageResource, 0, 0, 0, 0, $width, $height, $secondBestEntry["Width"], $secondBestEntry["Height"]);
+ $this->addImage($newImageResource, 32);
+ return $newImageResource;
+ } else {
+ return $secondBest->getImageResource();
+ }
+ }
+ }
+ /*
+ * readICO merges the icon images from the file to the current list
+ */
+ function readICO($file, $offset = 0) {
+ if (file_exists($file) && filesize($file) > 0 && $filePointer = fopen($file, "r")) {
+ fseek($filePointer, $offset);
+ $header = unpack("SReserved/SType/SCount", fread($filePointer, 6));
+ for ($t = 0; $t < $header["Count"]; $t++) {
+ $newImage = new floIconImage();
+ $newImage->readImageFromICO($filePointer, 6 + ($t * 16));
+ $this->images[] = $newImage;
+ }
+ fclose($filePointer);
+ }
+ }
+ function sortImagesBySize() {
+ usort($this->images, array("floIcon", "_cmpObj"));
+ }
+ function formatICO($offset = 0) {
+ $this->updated = false;
+ $output = "";
+ $output .= pack("SSS", 0, 1, count($this->images));
+ $output_images = "";
+ foreach ($this->images as $image) {
+ $newImageOffset = $offset + // Whatever offset we've been given.
+ 6 // Header.
+ + (count($this->images) * 16) // Entries.
+ + strlen($output_images);
+ if ($newImageOffset > pow(256, 4) /* 4 bytes available for position */ ) {
+ return false;
+ }
+ $output .= $image->formatEntryForIco($newImageOffset); // The images already in there.
+ $output_images .= $image->formatImageForIco();
+ }
+ return $output.$output_images;
+ }
+ function _cmpObj($a, $b) {
+ $aSize = $a->getSize();
+ $bSize = $b->getSize();
+ if ($aSize == $bSize) {
+ return 0;
+ }
+ return ($aSize > $bSize)?1:-1;
+ }
+
+ function addImage($imageResource, $desiredBitCount = 1, $pngIfWidthExceeds = 48) {
+ $this->updated = true;
+ $newImage = new floIconImage();
+ $newImage->setImageResource($imageResource, $desiredBitCount, $pngIfWidthExceeds);
+ $this->images[] = $newImage;
+ }
+ function getImage($offset) {
+ if (isset($this->images[$offset])) {
+ return $this->images[$offset]->getImageResource();
+ } else {
+ return false;
+ }
+ }
+ /*
+ * getSize computes the
+ */
+ function getSize() {
+ // Compute headers.
+ $computedSize = 6; // Always 6 bytes.
+ // Add image entry headers
+ $computedSize += count($this->images) * 16; // Entry headers are always 16 bytes.
+ foreach ($this->images as $image) {
+ $computedSize += $image->getSize() + $image->getHeaderSize(); // getSize does not include the header.
+ }
+ }
+}
+class floIconImage {
+ var $_imageResource = null;
+ var $_entry = "";
+ var $_entryIconFormat = "";
+ var $_header = "";
+ var $_headerIconFormat = "";
+ var $_imageIconFormat = ""; // Includes palette and mask.
+ function formatEntryForIco($offset) {
+ // Format the entry, this has to be done here because we need the offset to get the full information.
+ $this->_entry["FileOffset"] = $offset;
+ $this->_entryIconFormat = pack("CCCCSSLL",
+ $this->_entry["Width"]>=256?0:$this->_entry["Width"],
+ $this->_entry["Height"]>=256?0:$this->_entry["Height"],
+ $this->_entry["ColorCount"],
+ $this->_entry["Reserved"],
+ $this->_entry["Planes"],
+ $this->_entry["BitCount"],
+ $this->_entry["SizeInBytes"],
+ $this->_entry["FileOffset"]
+ );
+ return $this->_entryIconFormat;
+ }
+ function formatImageForIco() {
+ // Format the entry, this has to be done here because we need the offset to get the full information.
+ return ($this->_headerIconFormat.$this->_imageIconFormat);
+ }
+
+ // Will move $bitCount UP to $desiredBitCount if $bitCount is found to be less than it.
+ function setImageResource($imageResource, $desiredBitCount = 1, $pngIfWidthExceeds = 48) {
+ imagesavealpha($imageResource, true);
+ imagealphablending($imageResource, false);
+ $height = imagesy($imageResource);
+ $width = imagesx($imageResource);
+
+ // Parse resource to determine header and icon format
+
+ // Find Palette information
+ $is_32bit = false; // Start with an assumption and get proven wrong.
+ $hasTransparency = 0;
+ $blackColor = false;
+ $bitCount = 0;
+ $realPalette = array();
+ $realIndexPalette = array();
+ for ($x = 0; $x < $width && !$is_32bit; $x++) {
+ for ($y = 0; $y < $height && !$is_32bit; $y++) {
+ $colorIndex = imagecolorat($imageResource, $x, $y);
+ $color = imagecolorsforindex($imageResource, $colorIndex);
+ if ($color["alpha"] == 0) {
+ // No point continuing if there's more than 256 colors or it's 32bit.
+ if (count($realPalette) < 257 && !$is_32bit) {
+ $inRealPalette = false;
+ foreach($realPalette as $realPaletteKey => $realPaletteColor) {
+ if (
+ $color["red"] == $realPaletteColor["red"] and
+ $color["green"] == $realPaletteColor["green"] and
+ $color["blue"] == $realPaletteColor["blue"]
+ ) {
+ $inRealPalette = $realPaletteKey;
+ break;
+ }
+ }
+ if ($inRealPalette === false) {
+ $realIndexPalette[$colorIndex] = count($realPalette);
+ if (
+ $blackColor === false and
+ $color["red"] == 0 and
+ $color["green"] == 0 and
+ $color["blue"] == 0
+ ) {
+ $blackColor = count($realPalette);
+ }
+ $realPalette[] = $color;
+ } else {
+ $realIndexPalette[$colorIndex] = $inRealPalette;
+ }
+ }
+ } else {
+ $hasTransparency = 1;
+ }
+ if ($color["alpha"] != 0 && $color["alpha"] != 127) {
+ $is_32bit = true;
+ }
+ }
+ }
+ if ($is_32bit) {
+ $colorCount = 0;
+ $bitCount = 32;
+ } else {
+ if ($hasTransparency && $blackColor === false) {
+ // We need a black color to facilitate transparency. Unfortunately, this can
+ // increase the palette size by 1 if there's no other black color.
+ $blackColor = count($realPalette);
+ $color = array(
+ "red" => 0,
+ "blue" => 0,
+ "green" => 0,
+ "alpha" => 0
+ );
+ $realPalette[] = $color;
+ }
+ $colorCount = count($realPalette);
+ if ($colorCount > 256 || $colorCount == 0) {
+ $bitCount = 24;
+ } elseif ($colorCount > 16) {
+ $bitCount = 8;
+ // 8 bit
+ } elseif ($colorCount > 2) {
+ $bitCount = 4;
+ // 4 bit
+ } else {
+ $bitCount = 1;
+ // 1 bit
+ }
+ if ($desiredBitCount > $bitCount) {
+ $bitCount = $desiredBitCount;
+ }
+ switch ($bitCount) {
+ case 24:
+ $colorCount = 0;
+ break;
+ case 8:
+ $colorCount = 256;
+ break;
+ case 4:
+ $colorCount = 16;
+ break;
+ case 1:
+ $colorCount = 2;
+ break;
+ }
+ }
+ // Create $this->_imageIconFormat...
+ $this->_imageIconFormat = "";
+ if ($bitCount < 24) {
+ $iconPalette = array();
+ // Save Palette
+ foreach ($realIndexPalette as $colorIndex => $paletteIndex) {
+ $color = $realPalette[$paletteIndex];
+ $this->_imageIconFormat .= pack("CCCC", $color["blue"], $color["green"], $color["red"], 0);
+ }
+ while (strlen($this->_imageIconFormat) < $colorCount * 4) {
+ $this->_imageIconFormat .= pack("CCCC", 0, 0, 0, 0);
+ }
+ // Save Each Pixel as Palette Entry
+ $byte = 0; // For $bitCount < 8 math
+ $bitPosition = 0; // For $bitCount < 8 math
+ for ($y = 0; $y < $height; $y++) {
+ for ($x = 0; $x < $width; $x++) {
+ $color = imagecolorat($imageResource, $x, $height-$y-1);
+ if (isset($realIndexPalette[$color])) {
+ $color = $realIndexPalette[$color];
+ } else {
+ $color = $blackColor;
+ }
+
+ if ($bitCount < 8) {
+ $bitPosition += $bitCount;
+ $colorAdjusted = $color * pow(2, 8 - $bitPosition);
+ $byte += $colorAdjusted;
+ if ($bitPosition == 8) {
+ $this->_imageIconFormat .= chr($byte);
+ $bitPosition = 0;
+ $byte = 0;
+ }
+ } else {
+ $this->_imageIconFormat .= chr($color);
+ }
+ }
+ // Each row ends with dumping the remaining bits and filling up to the 32bit line with 0's.
+ if ($bitPosition) {
+ $this->_imageIconFormat .= chr($byte);
+ $bitPosition = 0;
+ $byte = 0;
+ }
+ if (strlen($this->_imageIconFormat)%4) $this->_imageIconFormat .= str_repeat(chr(0), 4-(strlen($this->_imageIconFormat)%4));
+ }
+ } else {
+ // Save each pixel.
+ for ($y = 0; $y < $height; $y++) {
+ for ($x = 0; $x < $width; $x++) {
+ $color = imagecolorat($imageResource, $x, $height-$y-1);
+ $color = imagecolorsforindex($imageResource, $color);
+ if ($bitCount == 24) {
+ if ($color["alpha"]) {
+ $this->_imageIconFormat .= pack("CCC", 0, 0, 0);
+ } else {
+ $this->_imageIconFormat .= pack("CCC", $color["blue"], $color["green"], $color["red"]);
+ }
+ } else {
+ $color["alpha"] = round((127-$color["alpha"]) / 127 * 255);
+ $this->_imageIconFormat .= pack("CCCC", $color["blue"], $color["green"], $color["red"], $color["alpha"]);
+ }
+ }
+ if (strlen($this->_imageIconFormat)%4) $this->_imageIconFormat .= str_repeat(chr(0), 4-(strlen($this->_imageIconFormat)%4));
+ }
+ }
+ // save AND map (transparency)
+ $byte = 0; // For $bitCount < 8 math
+ $bitPosition = 0; // For $bitCount < 8 math
+ for ($y = 0; $y < $height; $y++) {
+ for ($x = 0; $x < $width; $x++) {
+ if ($bitCount < 32) {
+ $color = imagecolorat($imageResource, $x, $height-$y-1);
+ $color = imagecolorsforindex($imageResource, $color);
+ $color = $color["alpha"] == 127?1:0;
+ } else {
+ $color = 0;
+ }
+
+ $bitPosition += 1;
+ $colorAdjusted = $color * pow(2, 8 - $bitPosition);
+ $byte += $colorAdjusted;
+ if ($bitPosition == 8) {
+ $this->_imageIconFormat .= chr($byte);
+ $bitPosition = 0;
+ $byte = 0;
+ }
+ }
+ // Each row ends with dumping the remaining bits and filling up to the 32bit line with 0's.
+ if ($bitPosition) {
+ $this->_imageIconFormat .= chr($byte);
+ $bitPosition = 0; // For $bitCount < 8 math
+ $byte = 0;
+ }
+ while (strlen($this->_imageIconFormat)%4) {
+ $this->_imageIconFormat .= chr(0);
+ }
+ }
+ if ($colorCount >= 256) {
+ $colorCount = 0;
+ }
+ // Create header information...
+ $this->_header = array(
+ "Size" => 40,
+ "Width" => $width,
+ "Height" => $height*2,
+ "Planes" => 1,
+ "BitCount" => $bitCount,
+ "Compression" => 0,
+ "ImageSize" => strlen($this->_imageIconFormat),
+ "XpixelsPerM" => 0,
+ "YpixelsPerM" => 0,
+ "ColorsUsed" => $colorCount,
+ "ColorsImportant" => 0,
+ );
+ $this->_headerIconFormat = pack("LLLSSLLLLLL",
+ $this->_header["Size"],
+ $this->_header["Width"],
+ $this->_header["Height"],
+
+ $this->_header["Planes"],
+ $this->_header["BitCount"],
+
+ $this->_header["Compression"],
+ $this->_header["ImageSize"],
+ $this->_header["XpixelsPerM"],
+ $this->_header["YpixelsPerM"],
+ $this->_header["ColorsUsed"],
+ $this->_header["ColorsImportant"]
+ );
+ $this->_entry = array(
+ "Width" => $width,
+ "Height" => $height,
+ "ColorCount" => $colorCount,
+ "Reserved" => 0,
+ "Planes" => 1,
+ "BitCount" => $bitCount,
+ "SizeInBytes" => $this->_header["Size"] + $this->_header["ImageSize"],
+ "FileOffset" => -1,
+ );
+ $this->_entryIconFormat = ""; // This won't get set until it's needed with the offset.
+ $this->_imageResource = $imageResource;
+
+ // Make png if width exceeds limit for old ico style
+ if ($width > $pngIfWidthExceeds) {
+ // I wish there were a better way to get the info than this. If anyone needs a version that doesn't use OB, I can have one that creates a TMP file.
+ ob_start();
+ imagepng($imageResource);
+ $imageAsPng = ob_get_contents();
+ ob_end_clean();
+ $this->_headerIconFormat = "";
+ $this->_imageIconFormat = $imageAsPng;
+ }
+
+
+ }
+ function _createImageResource() {
+ if ($newImage = @imagecreatefromstring($this->_headerIconFormat.$this->_imageIconFormat)) {
+ // Vista supports PNG.
+ $this->_headerIconFormat = "";
+ $this->_imageIconFormat = $this->_headerIconFormat.$this->_imageIconFormat;
+ imagesavealpha($newImage, true);
+ imagealphablending($newImage, false);
+ $this->_imageResource = $newImage;
+ } elseif ($this->_entry["Height"] <= 1024 && $this->_entry["Width"] <= 1024) {
+ $newImage = imagecreatetruecolor($this->_entry["Width"], $this->_entry["Height"]);
+ imagesavealpha($newImage, true);
+ imagealphablending($newImage, false);
+ $readPosition = 0;
+ $palette = array();
+ if ($this->_header["BitCount"] < 24) {
+ // Read Palette for low bitcounts
+ $colorsInPalette = $this->_header["ColorsUsed"]?$this->_header["ColorsUsed"]:$this->_entry["ColorCount"];
+ for ($t = 0; $t < pow(2, $this->_header["BitCount"]); $t++) {
+ $blue = ord($this->_imageIconFormat[$readPosition++]);
+ $green = ord($this->_imageIconFormat[$readPosition++]);
+ $red = ord($this->_imageIconFormat[$readPosition++]);
+ $readPosition++; // Unused "Reserved" value.
+ $existingPaletteEntry = imagecolorexactalpha($newImage, $red, $green, $blue, 0);
+ if ($existingPaletteEntry >= 0) {
+ $palette[] = $existingPaletteEntry;
+ } else {
+ $palette[] = imagecolorallocatealpha($newImage, $red, $green, $blue, 0);
+ }
+ }
+ // XOR
+ for ($y = 0; $y < $this->_entry["Height"]; $y++) {
+ $colors = array();
+ for ($x = 0; $x < $this->_entry["Width"]; $x++) {
+ if ($this->_header["BitCount"] < 8) {
+ $color = array_shift($colors);
+ if (is_null($color)) {
+ $byte = ord($this->_imageIconFormat[$readPosition++]);
+ $tmp_color = 0;
+ for ($t = 7; $t >= 0; $t--) {
+ $bit_value = pow(2, $t);
+ $bit = floor($byte / $bit_value);
+ $byte = $byte - ($bit * $bit_value);
+ $tmp_color += $bit * pow(2, $t%$this->_header["BitCount"]);
+ if ($t%$this->_header["BitCount"] == 0) {
+ array_push($colors, $tmp_color);
+ $tmp_color = 0;
+ }
+ }
+ $color = array_shift($colors);
+ }
+ } else {
+ $color = ord($this->_imageIconFormat[$readPosition++]);
+ }
+ imagesetpixel($newImage, $x, $this->_entry["Height"]-$y-1, $palette[$color]) or die("can't set pixel");
+ }
+ // All rows end on the 32 bit
+ if ($readPosition%4) $readPosition += 4-($readPosition%4);
+ }
+ } else {
+ // BitCount >= 24, No Palette.
+ // marking position because some icons mark all pixels transparent when using an AND map.
+ $markPosition = $readPosition;
+ $retry = true;
+ $ignoreAlpha = false;
+ while ($retry) {
+ $alphas = array();
+ $retry = false;
+ for ($y = 0; $y < $this->_entry["Height"] and !$retry; $y++) {
+ for ($x = 0; $x < $this->_entry["Width"] and !$retry; $x++) {
+ $blue = ord($this->_imageIconFormat[$readPosition++]);
+ $green = ord($this->_imageIconFormat[$readPosition++]);
+ $red = ord($this->_imageIconFormat[$readPosition++]);
+ if ($this->_header["BitCount"] < 32) {
+ $alpha = 0;
+ } elseif($ignoreAlpha) {
+ $alpha = 0;
+ $readPosition++;
+ } else {
+ $alpha = ord($this->_imageIconFormat[$readPosition++]);
+ $alphas[$alpha] = $alpha;
+ $alpha = 127-round($alpha/255*127);
+ }
+ $paletteEntry = imagecolorexactalpha($newImage, $red, $green, $blue, $alpha);
+ if ($paletteEntry < 0) {
+ $paletteEntry = imagecolorallocatealpha($newImage, $red, $green, $blue, $alpha);
+ }
+ imagesetpixel($newImage, $x, $this->_entry["Height"]-$y-1, $paletteEntry) or die("can't set pixel");
+ }
+ if ($readPosition%4) $readPosition += 4-($readPosition%4);
+ }
+ if ($this->_header["BitCount"] == 32 && isset($alphas[0]) && count($alphas) == 1) {
+ $retry = true;
+ $readPosition = $markPosition;
+ $ignoreAlpha = true;
+ }
+ }
+
+ }
+ // AND map
+ if ($this->_header["BitCount"] < 32 || $ignoreAlpha) {
+ // Bitcount == 32, No AND (if using alpha).
+ $palette[-1] = imagecolorallocatealpha($newImage, 0, 0, 0, 127);
+ imagecolortransparent($newImage, $palette[-1]);
+ for ($y = 0; $y < $this->_entry["Height"]; $y++) {
+ $colors = array();
+ for ($x = 0; $x < $this->_entry["Width"]; $x++) {
+ $color = array_shift($colors);
+ if (is_null($color)) {
+ $byte = ord($this->_imageIconFormat[$readPosition++]);
+ $tmp_color = 0;
+ for ($t = 7; $t >= 0; $t--) {
+ $bit_value = pow(2, $t);
+ $bit = floor($byte / $bit_value);
+ $byte = $byte - ($bit * $bit_value);
+ array_push($colors, $bit);
+ }
+ $color = array_shift($colors);
+ }
+ if ($color) {
+ imagesetpixel($newImage, $x, $this->_entry["Height"]-$y-1, $palette[-1]) or die("can't set pixel");
+ }
+ }
+ // All rows end on the 32 bit.
+ if ($readPosition%4) $readPosition += 4-($readPosition%4);
+ }
+ }
+ if ($this->_header["BitCount"] < 24) {
+ imagetruecolortopalette($newImage, true, pow(2, $this->_header["BitCount"]));
+ }
+ }
+ $this->_imageResource = $newImage;
+ }
+ // this function expects that $_entry, $_header and $_imageIconFormat have already been read, specifically from readImageFromICO.
+ // Don't call this function except from there.
+ function readImageFromICO($filePointer, $entryOffset) {
+ $tmpPosition = ftell($filePointer); // So any other applications won't loose their position.
+ // Get the entry.
+ fseek($filePointer, $entryOffset);
+ $this->_entryIconFormat = fread($filePointer, 16);
+ $this->_entry = unpack("CWidth/CHeight/CColorCount/CReserved/SPlanes/SBitCount/LSizeInBytes/LFileOffset", $this->_entryIconFormat);
+
+ // Position the file pointer.
+ fseek($filePointer, $this->_entry["FileOffset"]);
+
+ // Get the header.
+ $this->_headerIconFormat = fread($filePointer, 40);
+ $this->_header = unpack("LSize/LWidth/LHeight/SPlanes/SBitCount/LCompression/LImageSize/LXpixelsPerM/LYpixelsPerM/LColorsUsed/LColorsImportant", $this->_headerIconFormat);
+
+ // Get the image.
+ $this->_imageIconFormat = @fread($filePointer, $this->_entry["SizeInBytes"] - strlen($this->_headerIconFormat));
+ fseek($filePointer, $tmpPosition); // So any other applications won't loose their position.
+
+ if ($newImage = @imagecreatefromstring($this->_headerIconFormat.$this->_imageIconFormat)) {
+ // This is a PNG, the supposed header information is useless.
+ $this->_header = array (
+ "Size" => 0,
+ "Width" => imagesx($newImage),
+ "Height" => imagesy($newImage) * 2,
+ "Planes" => 0,
+ "BitCount" => 32,
+ "Compression" => 0,
+ "ImageSize" => strlen($this->_imageIconFormat),
+ "XpixelsPerM" => 0,
+ "YpixelsPerM" => 0,
+ "ColorsUsed" => 0,
+ "ColorsImportant" => 0,
+ );
+ imagedestroy($newImage);
+ }
+
+ // Support for larger images requires entry marked as 0.
+ if ($this->_entry["Width"] == 0) {
+ $this->_entry["Width"] = $this->_header["Width"];
+ }
+ if ($this->_entry["Height"] == 0) {
+ $this->_entry["Height"] = $this->_header["Height"]/2;
+ }
+ }
+ function getHeader() {
+ return $this->_header;
+ }
+ function getEntry() {
+ return $this->_entry;
+ }
+ function floIconImage() {
+ }
+ function getHeaderSize() {
+ return strlen($this->_headerIconFormat);
+ }
+ function getSize() {
+ return strlen($this->_imageIconFormat);
+ }
+ function getImageResource() {
+ if (!$this->_imageResource) $this->_createImageResource();
+ return $this->_imageResource;
+ }
+ function dealocateResource() {
+ @imagedestroy($this->_imageResource);
+ $this->_imageResource = null;
+ }
+}
+?>
\ No newline at end of file
projects / tt-rss.git / commitdiff