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Sunday July 21, 2024
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XBOX Programming

More than just a hobby...


Blitting an image to the screen


{In Development - Under Construction}




The demo source code and xbe was developed in nasm, and makes the assumption that your using a PAL xbox.  Again if your not using a pal xbox, the code seems to run perfectly well...but the image is blitted offset on the screen.  You should put some code to check your xbox configuration and screen settings etc...which I might put in later.  A screenshot of what to expect is shown on the right... its not much...but it blitz a raw image to the screen.


How did I get a raw image....well I took a 24bit bitmap and stripped off the header information...so that the file is just a raw image of Red Green Blue values...  Again you could improve the code to check the bmp file header...and read in the appropriate data.


A nice next move, would probably be to animate an image.... possibly put in a small loop, and have a ball bounce around the screen....or maybe even a rotating cube?  All this asm might make some people feel a little freaked out...especially when its written by someone else...and I'm sure my asm could do with more commenting.  So our next move will be to compile our code using a compiler....create a windows exe...then convert it to a raw binary using 'ExeToBin.exe'...and put the header info in.


We can do slightly more complex code then....put in structures...and write functions ....and once we get to a confortable level....we can then maybe write an exe to xbe converter...or even an xbe linker?  Of course we'll have to start looking into debugging... as our code grows, debug information if vital.  But we'll soon get there.





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