rotate.h File Reference

Utility function(s) to rotate & flip screen buffers. More...

#include <stdlib.h>
#include <math.h>
#include "rfb/rfb.h"
#include "rfb/rfbregion.h"

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Functions
unsigned short int	notEqual (unsigned short int *fbbuf, unsigned short int *cmpbuf, unsigned long int size)
void	rotate0 (rfbScreenInfoPtr rfbScreen, unsigned short int *fbbuf, unsigned short int *cmpbuf)
void	rotate180 (rfbScreenInfoPtr rfbScreen, unsigned short int *fbbuf, unsigned short int *cmpbuf)
void	rotate270 (rfbScreenInfoPtr rfbScreen, unsigned short int *fbbuf, unsigned short int *cmpbuf)
void	rotate90 (rfbScreenInfoPtr rfbScreen, unsigned short int *fbbuf, unsigned short int *cmpbuf)

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Detailed Description

Utility function(s) to rotate & flip screen buffers.

supported C-PreProcessor directives

• DEBUG

Author:

• Patrik Gfeller

Date:

2006

Definition in file rotate.h.

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Function Documentation

unsigned short int notEqual	(	unsigned short int *	fbbuf,
		unsigned short int *	cmpbuf,
		unsigned long int	size
	)

... did the PDA screen change?

Parameters:

	*fbbuf	pointer to mmap'ed framebuffer
	*cmpbuf	pointer to a copy of the previous framebuffer contents
	size	size

Returns:

0: the screen did NOT change, 1: the screen changed

Definition at line 5 of file rotate.c.

Referenced by main().

                                                           {
  unsigned short int 
      nCounter,
      returnValue = 0;                                
  for (nCounter = 0; nCounter < size; nCounter++) {
    if (*cmpbuf++ != *fbbuf++) {
      returnValue = 1;
      break;
    }; // end of [if]
  }; // end of [for]
  return returnValue;
}; // end of [notEqual]

void rotate0	(	rfbScreenInfoPtr	rfbScreen,
		unsigned short int *	fbbuf,
		unsigned short int *	cmpbuf
	)

...reads the HW framebuffer with a 0 degree rotation. The result is stored in the remote-framebuffer structure. This function is implemented for 0,90,180 and 270 degrees (rotate0, rotate90, rotate180 & rotate270)

Parameters:

	rfbScreen	pointer to a rfbScreenInfoPtr structur as defined in rfb.h (LibVNCServer).
	fbbuf	pointer to a mem-mapped iPAQ framebuffer
	cmpbuf	pointer to the compare buffer

Referenced by main().

void rotate180	(	rfbScreenInfoPtr	rfbScreen,
		unsigned short int *	fbbuf,
		unsigned short int *	cmpbuf
	)

Referenced by main().

void rotate270	(	rfbScreenInfoPtr	rfbScreen,
		unsigned short int *	fbbuf,
		unsigned short int *	cmpbuf
	)

Referenced by main().

void rotate90	(	rfbScreenInfoPtr	rfbScreen,
		unsigned short int *	fbbuf,
		unsigned short int *	cmpbuf
	)

Referenced by main().

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