remove floIcon: bugs
Andrew Dolgov
12 years ago
parent
da1e51cdfb
commit
7970c09255
@ -1,843 +0,0 @@
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<?php
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/***************************************************************************
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* Original floIcon copyright (C) 2007 by Joshua Hatfield. *
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* *
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* In order to use any part of this floIcon Class, you must comply with *
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* the license in 'license.doc'. In particular, you may not remove this *
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* copyright notice. *
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* *
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* Much time and thought has gone into this software and you are *
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* benefitting. We hope that you share your changes too. What goes *
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* around, comes around. *
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***************************************************************************
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Version 1.1.1:
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Date: 2009-03-16
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Changes:
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I was a little hasty on that last update. A couple new bugs from 1.1.0 have
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been fixed.
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Version 1.1.0:
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Date: 2009-03-16
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Changes:
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Added Vista support.
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Fixed a number of minor bugs. Many thanks to Dvir Berebi for pointing
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them out.
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Version 1.0.5:
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Date: 2009-03-15
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Changes:
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Fixed bug when operating on low bit count images (1 or 4) with odd dimensions.
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Version 1.0.4:
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Date: 2007-05-25
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Changes:
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Made function not break quite so bad when reading a PNG file on a Vista icon.
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Now, you shouldn't be loading Vista icons anyways, but since I'm trying to
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upgrade to Vista compatible and I need a comparison, I've got to.
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Version 1.0.3:
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Date: 2007-05-25
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Changes:
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Okay, this one was just stupid. When adding large image support, I messed up
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and when reading, it doubled the image size. Now, it's fixed.
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I took the opportunity to also add a dummy AND map for 32 images on those
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readers who might be looking for it (though it's not supposed to be used.)
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Version 1.0.2:
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Date: 2007-05-24
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Sorry about two versions so quickly back to back, but something needed to be
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done with speed...things were getting too slow. I'm sure you'll be okay.
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Changes:
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Told palette determination to stop at 257 colors or is 32 bit because the
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palette is not used at that point and gets really slow when it starts
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getting into the high numbers, for instance, in photographs or gradient
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truecolor images with lots of unique colors.
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After experimenting, it appears that Windows XP does in fact support 256x256
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images and larger by setting the entry value to 0 in the 1 byte that holds
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that value and storing the true dimentions in the image header later. Of
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course, it still doesn't use these images in normal operation. XP will
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resize these and use them if no other images are available.
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Wrapped main documentation (this) to the 80th column for easier reading.
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Version 1.0.1:
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Date: 2007-05-23
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Thank you everyone for actively using the implementation on my site and
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illuminating me very quickly to a number of glaring bugs in this class.
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Changes:
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Added version history.
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Fixed bug with non-standard sizes in AND map reading AND writing.
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Fixed bug with palette images using non-black color in backgrounds.
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Fixed bug with height/width reversal reading files.
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Version 1.0.0:
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Date: 2007-05-17
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Original release date.
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Foreword:
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If you are simply in the effort of making an ICO file, may I recommend visiting
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my site, http://www.flobi.com/ , and clicking on floIcon. I have a fully
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functional implementation (on which the sample.php is based) where you can also
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see recent icons submitted by other visitors. No registration required, no
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intrusive ads. (As of this writing, there aren't actually any ads at all, I
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might add google ads at some point.)
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If you are trying to get an idea of how ICO files, work, may I recommend the
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page I used, http://www.daubnet.com/formats/ICO.html . It does not fully cover
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icon files, but it does a very good job of what it does. Any additional
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information, I will try to post at
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http://www.flobi.com/test/floIcon/more_on_icons.php for your convenience.
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If you are trying to get an idea of how image resource files work, I recommend
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ANY other class that deals with images. This class essentially plots points on
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the image, and that's not perticularly advanced.
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For any purpose, I wish you luck and feel free to contact me with any bugs,
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comments, questions, etc. - Flobi
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Summary:
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This class parses ICO files. It reads directly from the ICO file, headers
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first, so that if you are only retrieving 1 image, the entire ICO file need not
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be parsed. It supports merging ICO files. It supports adding PHP image
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resources as new images to the file. It has an export capability that can
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easily be written to a new (or the same) ICO file for saving ICO files. All
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sizes from 1x1 to 255x255 pixels and 1, 4, 8, 24 (plus transparency) and 32 bit
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images are supported. Image retrieval by size is supported.
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Included is a fully functional sample that allows users to upload ICO, GIF,
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JPEG and PNG files into a session icon file as well as remove images from the
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file and download the completed file (sample.php).
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Known Limitations: Does not support Vista icons. Does not support inversion
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palette method (because of the limitations of the PHP image resource).
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Addendum on Limitations:
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Windows Vista has added support for 256x256 size icons and now stores files as
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PNG's. This class is for older ICO files. A new class is currently under
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development that supports the new Windows Vista format.
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Palette inversion (my name for this technique) is the technique of using a black
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pixel (0, 0, 0) with a 1 "AND" pixel. White pixels with a 1 "AND" show
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transparent (or "don't" show). Black pixels with a 1 "AND" show inverted
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(sometimes). Because this method isn't uniformly supported or documented and
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the PHP image resource doesn't support it, I have decided to not as well. This
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does not apply to 32 bit images which include alpha transparency and no AND map.
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Though other functions exist, these are the only ones I believe offer usefulness
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to be public.
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floIcon public functions:
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readICO($file, $offset = 0)
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Loads the icon from the specified filepath ($file) starting at the
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specified file offset ($offset). This function MERGES the loaded icon
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images into the floIcon object.
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formatICO($offset = 0)
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Returns the current floIcon object formatted as an .ICO file with the
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file offset altered by $offset. If there are too many or too large
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images, causing any images saved past the 4,294,967,296th byte, this
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will return false. (This is well outside PHP's default memory
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allocation.)
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addImage($imageResource, $desiredBitCount = 1, $pngIfWidthExceeds = 48)
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Adds an icon image to the icon file based on the passed image resource
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($imageResource). It will automatically determine the bit count, but
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can be persuaded to increase that to $desiredBitCount if that value is
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greater than the determined bit count.
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NOTE: The image resource is saved by REFERRENCE. So, if you edit it
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then call getImage, the resource returned will be the same, editions and
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all. Destruction of the resource will cause a new resource to be
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created in getImage().
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getImage($offset)
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Returns the php image resource either assigned by addImage or created
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dynamically at calltime by the data loaded with readICO(). The offset
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specified here ($offset) is the array offset starting at 0 and ending
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at countImages().
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getBestImage($height = 32, $width = 32)
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Returns the php images resource of the highest quality image closest to
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the size specified. This could be useful when you only want to display
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the icon in an icon list with a single representative icon. A resized
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copy of the highest quality available image will be returned if there is
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no 32 or 24 bit icon present at the speficied dimentions.
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sortImagesBySize()
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Sorts the $this->images array by order of size, smallest to largest.
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This is the optimal sorting for icon files.
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countImages()
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Returns a count of how many images are present in the current floIcon
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object.
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floIcon public variables:
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$images
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Contains a numerically indexed array of floIconImage objects.
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$updated
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True if an image has been added since load or last formatICO, otherwise
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false.
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floIconImage public functions:
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getHeader()
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Returns an associative array containing the information from the ICO
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image header.
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getEntry()
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Returns an associative array containing the information from the ICO
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entry header.
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NOTE: If this icon image was created by php image resource, this may not
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have accurate information until saving from floIcon with the formatICO()
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function. Specifically, offset information will be inaccurate.
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getImageResource()
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Returns a php image resource. Same as floIcon's getImage() function.
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setImageResource($imageResource, $desiredBitCount = 1, $pngIfWidthExceeds = 48)
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Changes this icon image based on the passed image resource
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($imageResource). It will automatically determine the bit count, but can
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be persuaded to increase that to $desiredBitCount if that value is
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greater than the determined bit count.
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NOTE: The image resource is saved by REFERRENCE. So, if you edit it
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then call getImageResource, the resource returned will be the same,
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editions and all. Destruction of the resource will cause a new resource
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to be created in getImageResource().
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dealocateResource()
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This destroys the image resource variable, freeing up memory. The image
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will automatically be recreated when getImageResource is executed.
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*/
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class floIcon {
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/*
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* $images is an associative array of offset integer => floIconImage object
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*/
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var $images; // Array of floIconImage objects.
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var $updated = false;
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function floIcon() {
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$this->images = array();
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}
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function countImages() {
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return count($this->images);
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}
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function getBestImage($height = 32, $width = 32) {
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$best = false;
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$bestEntry = array();
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$secondBest = false;
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$secondBestEntry = array();
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foreach ($this->images as $key => $image) {
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$entry = $image->getEntry();
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$header = $image->getHeader();
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if (!@$entry["BitCount"]) {
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$entry["BitCount"] = $header["BitCount"];
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}
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if ($entry["Height"] == $height && $entry["Width"] == $width && $entry["BitCount"] == 32) {
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return $image->getImageResource();
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} elseif ($entry["Height"] == $height && $entry["Width"] == $width && $entry["BitCount"] > min(4, @$bestEntry["BitCount"])) {
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$best = $image;
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$bestEntry = $entry;
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} elseif (
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!$secondBest or
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$entry["Height"] >= $secondBestEntry["Height"] &&
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$entry["Width"] >= $secondBestEntry["Width"] &&
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$secondBestEntry["BitCount"] >= $secondBestEntry["BitCount"] and
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(
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$entry["Height"] <= 64 && $entry["Height"] > $secondBestEntry["Height"] and
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$entry["Height"] > 64 && $entry["Height"] < $secondBestEntry["Height"]
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) ||
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(
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$entry["Width"] <= 64 && $entry["Width"] > $secondBestEntry["Width"] and
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$entry["Width"] > 64 && $entry["Width"] < $secondBestEntry["Width"]
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) ||
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$secondBestEntry["BitCount"] > $secondBestEntry["BitCount"]
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) {
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$secondBest = $image;
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$secondBestEntry = $entry;
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}
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}
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if ($best) {
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return $best->getImageResource();
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} elseif ($secondBest) {
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if ($secondBestEntry["Width"] != $width || $secondBestEntry["Height"] != $height) {
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$imageResource = $secondBest->getImageResource();
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$newImageResource = imagecreatetruecolor($width, $height);
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imagesavealpha($newImageResource, true);
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imagealphablending($newImageResource, false);
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imagecopyresampled($newImageResource, $imageResource, 0, 0, 0, 0, $width, $height, $secondBestEntry["Width"], $secondBestEntry["Height"]);
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$this->addImage($newImageResource, 32);
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return $newImageResource;
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} else {
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return $secondBest->getImageResource();
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}
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}
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}
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/*
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* readICO merges the icon images from the file to the current list
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*/
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function readICO($file, $offset = 0) {
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if (file_exists($file) && filesize($file) > 0 && $filePointer = fopen($file, "r")) {
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fseek($filePointer, $offset);
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$header = unpack("SReserved/SType/SCount", fread($filePointer, 6));
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for ($t = 0; $t < $header["Count"]; $t++) {
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$newImage = new floIconImage();
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$newImage->readImageFromICO($filePointer, 6 + ($t * 16));
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$this->images[] = $newImage;
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}
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fclose($filePointer);
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}
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}
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function sortImagesBySize() {
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usort($this->images, array("floIcon", "_cmpObj"));
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}
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function formatICO($offset = 0) {
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$this->updated = false;
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$output = "";
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$output .= pack("SSS", 0, 1, count($this->images));
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$output_images = "";
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foreach ($this->images as $image) {
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$newImageOffset = $offset + // Whatever offset we've been given.
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6 // Header.
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+ (count($this->images) * 16) // Entries.
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+ strlen($output_images);
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if ($newImageOffset > pow(256, 4) /* 4 bytes available for position */ ) {
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return false;
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}
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$output .= $image->formatEntryForIco($newImageOffset); // The images already in there.
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$output_images .= $image->formatImageForIco();
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}
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return $output.$output_images;
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}
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function _cmpObj($a, $b) {
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$aSize = $a->getSize();
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$bSize = $b->getSize();
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if ($aSize == $bSize) {
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return 0;
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}
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return ($aSize > $bSize)?1:-1;
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}
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function addImage($imageResource, $desiredBitCount = 1, $pngIfWidthExceeds = 48) {
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$this->updated = true;
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$newImage = new floIconImage();
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$newImage->setImageResource($imageResource, $desiredBitCount, $pngIfWidthExceeds);
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$this->images[] = $newImage;
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}
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function getImage($offset) {
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if (isset($this->images[$offset])) {
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return $this->images[$offset]->getImageResource();
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} else {
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return false;
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}
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}
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/*
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* getSize computes the
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*/
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function getSize() {
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// Compute headers.
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$computedSize = 6; // Always 6 bytes.
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// Add image entry headers
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$computedSize += count($this->images) * 16; // Entry headers are always 16 bytes.
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foreach ($this->images as $image) {
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$computedSize += $image->getSize() + $image->getHeaderSize(); // getSize does not include the header.
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}
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}
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}
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class floIconImage {
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var $_imageResource = null;
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var $_entry = "";
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var $_entryIconFormat = "";
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var $_header = "";
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var $_headerIconFormat = "";
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var $_imageIconFormat = ""; // Includes palette and mask.
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function formatEntryForIco($offset) {
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// Format the entry, this has to be done here because we need the offset to get the full information.
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$this->_entry["FileOffset"] = $offset;
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$this->_entryIconFormat = pack("CCCCSSLL",
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$this->_entry["Width"]>=256?0:$this->_entry["Width"],
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$this->_entry["Height"]>=256?0:$this->_entry["Height"],
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$this->_entry["ColorCount"],
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$this->_entry["Reserved"],
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$this->_entry["Planes"],
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$this->_entry["BitCount"],
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$this->_entry["SizeInBytes"],
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$this->_entry["FileOffset"]
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);
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return $this->_entryIconFormat;
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}
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function formatImageForIco() {
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// Format the entry, this has to be done here because we need the offset to get the full information.
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return ($this->_headerIconFormat.$this->_imageIconFormat);
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}
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// Will move $bitCount UP to $desiredBitCount if $bitCount is found to be less than it.
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function setImageResource($imageResource, $desiredBitCount = 1, $pngIfWidthExceeds = 48) {
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imagesavealpha($imageResource, true);
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imagealphablending($imageResource, false);
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$height = imagesy($imageResource);
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$width = imagesx($imageResource);
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// Parse resource to determine header and icon format
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// Find Palette information
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$is_32bit = false; // Start with an assumption and get proven wrong.
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$hasTransparency = 0;
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$blackColor = false;
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$bitCount = 0;
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$realPalette = array();
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$realIndexPalette = array();
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for ($x = 0; $x < $width && !$is_32bit; $x++) {
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for ($y = 0; $y < $height && !$is_32bit; $y++) {
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$colorIndex = imagecolorat($imageResource, $x, $y);
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$color = imagecolorsforindex($imageResource, $colorIndex);
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if ($color["alpha"] == 0) {
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// No point continuing if there's more than 256 colors or it's 32bit.
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if (count($realPalette) < 257 && !$is_32bit) {
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$inRealPalette = false;
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foreach($realPalette as $realPaletteKey => $realPaletteColor) {
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if (
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$color["red"] == $realPaletteColor["red"] and
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$color["green"] == $realPaletteColor["green"] and
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$color["blue"] == $realPaletteColor["blue"]
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) {
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$inRealPalette = $realPaletteKey;
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break;
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}
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}
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if ($inRealPalette === false) {
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$realIndexPalette[$colorIndex] = count($realPalette);
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if (
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$blackColor === false and
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$color["red"] == 0 and
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$color["green"] == 0 and
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$color["blue"] == 0
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) {
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$blackColor = count($realPalette);
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}
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$realPalette[] = $color;
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} else {
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$realIndexPalette[$colorIndex] = $inRealPalette;
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}
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}
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} else {
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$hasTransparency = 1;
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}
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if ($color["alpha"] != 0 && $color["alpha"] != 127) {
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$is_32bit = true;
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}
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}
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}
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if ($is_32bit) {
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$colorCount = 0;
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$bitCount = 32;
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} else {
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if ($hasTransparency && $blackColor === false) {
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// We need a black color to facilitate transparency. Unfortunately, this can
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// increase the palette size by 1 if there's no other black color.
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$blackColor = count($realPalette);
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$color = array(
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"red" => 0,
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"blue" => 0,
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"green" => 0,
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"alpha" => 0
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);
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$realPalette[] = $color;
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}
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||||
$colorCount = count($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;
|
||||
}
|
||||
}
|
||||
?>
|
||||
Loading…
Reference in New Issue