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hot to read a pixel color from screen (banks)?
- Thread starter GuyZana
- Start date
May be you should post some more details about the environment. Any way, this is how u do it on DOS. Take a char far pointer, put the base address of the display buffer and you are all set! for SVGA cards, the starting address is 0xA000000l; (mind u, its 'L' in lower case at the end, not 1 (one))
similar approach would be there for other OS. Its also possible that functions are available for doing this job. I hope it was helpful.
have fun coding... ;-)
Roy
Code:
char far *scrPtr=(char far*)0xA0000000l;
long scrIdx=0;
printf("\nColor of the TOP LEFT pixel is %d",*scrPtr);
//filling the screen blue.
for(scrIdx=0;scrIdx<480000;scrIdx++)
scrPtr[scrIdx]=(char)55;similar approach would be there for other OS. Its also possible that functions are available for doing this job. I hope it was helpful.
have fun coding... ;-)
Roy
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