note that this book has some significant bugs (I remember specifically a faulty quadratic equation that I was stuck on), but I don't think you use this book for the code, which is pretty outdated. This book is useful as a reminder that things like photoshop are driven by algorithms, many of which are not rocket science but rather, fit in your pocket.
One thing I particularly like about this book is that the author used photographs of his child that look super unhappy. After applying filters to them, she looks even more unhappy. It gives the book a dark and foreboding feeling.
Anyway, I always show this book to my students (along with processes like saving a raw image and opening it in audacity as a sound file, the custom tool in photoshop) as a means of demystifying image processing.
Nice looking book. Handy to keep in your back pocket in case you're walking down the street and see someone staring at a laptop and yelling in anguish, 'Please, can't someone help me implement a proper noise algorithm!? This is an emergency!'
Do note that modern compilers can detect when the return value of the ++ operator is unused, and skip the extra steps when unneeded. (I've verified the resulting assembler myself from GCC 3.X.) That said, I still use the prefix notation because I can't come up with a good reason not to.
Neither one really has a direct "equivalent" in assembly.
Prefix is going to look something like:
inc eax # increment the value
mov eax,ecx # copy the return value to its destination
Postfix is going to look something like:
mov eax,ebx # copy original value
inc eax # increment value
mov ebx,ecx # copy original value to final destination
The actual code you'd get would vary a lot between compilers, architectures, and even just different contexts within the same compiler-architecture combination.
On the flipside, using pre-increment introduces a dependency, which means the processor can't do Out-of-order execution on instructions using that value...
One thing I particularly like about this book is that the author used photographs of his child that look super unhappy. After applying filters to them, she looks even more unhappy. It gives the book a dark and foreboding feeling.
Anyway, I always show this book to my students (along with processes like saving a raw image and opening it in audacity as a sound file, the custom tool in photoshop) as a means of demystifying image processing.