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POHow do fixed point bit values in swf files work?
 

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  1. POHow do fixed point bit values in swf files work?
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    <p>The SWF File Format Specification Version 19 says the scale value in the MATRIX record is stored as FB, somewhere else in the specification it says the FB is a 32 bit 16.16 fixed point value, but there's a value how many bits it uses to store the value and in the example it is a 3.16 value and not a 16.16 value.</p> <ul> <li>How can it be a 32 bit 16.16 value and a 19 bit 3.16 value at the same time?</li> <li>How does Flash Player know wheter it's a 3.16, 4.15, 5.14, X.X value?</li> <li>What exactly is the format of the FB?</li> </ul> <p>I want to know this because I want to insert a sprite into a already compiled SWF file. I already succesfully used the PlaceObject tag once in that sprite but now I have an image that has to be scaled down, this is done in the MATRIX record too, but first I didn't need the FB because the other image already is at the right scale.</p> <p>edit: I'm going to try if I can make new sprites with Sothink SWF Quicker tomorrow, if it doesn't work I'll try to make a simple swf file with the sprite in it using Adobe Flash CS 6 and then copy the DefineSprite tag into the other SWF file. If someone answers I'll first try to do the scale thing with a hex editor before I try it with Sothink SWF Quicker.</p> <p>edit2: Sothink SWF Quicker crashes when I try to Import the SWF file. If copying the tag from the SWF file I'm going to create doesn't work I'll delete the image I want to place with the PlaceObject tag and then reinsert it scaled down.</p> <p>edit3: I don't know how to make Flash use the DefineSprite tag, so I added a DefineBitsLossless2 tag with the image scaled down, I'll be using this image in the sprite. I don't need the FB now anymore, but it still would be nice to know how they work, so if someone know it, please answer.</p>
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      1. POHow do fixed point bit values in swf files work?
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