psibitmap.h File Reference

#include "bufferstore.h"

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Typedefs
typedef int(*	getPixelFunction_t) (int x, int y)
	This function is used by encodeBitmap for retrieving image data. More...

Functions
void	encodeBitmap (int width, int height, getPixelFunction_t getPixel, bool rle, bufferStore &out)
	Convert an image into a bitmap in Psion format. More...
bool	decodeBitmap (const unsigned char *p, int &width, int &height, bufferStore &out)
	Convert a Psion bitmap to a 8bit/pixel grayscale image. More...

Typedef Documentation

getPixelFunction_t

typedef int(* getPixelFunction_t) (int x, int y)

This function is used by encodeBitmap for retrieving image data.

It must return a gray value between 0 and 255 where 0 is black and 255 is white.

Parameters

x	The x coordinate of the pixel to get (0 = left)
y	The y coordinate of the pixel to get (0 = top)

Definition at line 34 of file psibitmap.h.

Function Documentation

decodeBitmap()

bool decodeBitmap	(	const unsigned char *	p,
		int &	width,
		int &	height,
		bufferStore &	out
	)

Convert a Psion bitmap to a 8bit/pixel grayscale image.

Parameters

p	Pointer to an input buffer which contains the Psion-formatted bitmap to convert. Must start with a Psion bitmap header.
width	On return, the image width in pixels is returned here.
height	On return, the image height in pixels is returned here.
out	Buffer which gets filled with the raw image data. Each pixel is represented by a byte. The image data is organized in height scanlines of width bytes, starting with the topmost scanline.

Returns

true on success, false if input data is inconsistent.

Definition at line 141 of file psibitmap.cpp.

encodeBitmap()

void encodeBitmap	(	int	width,
		int	height,
		getPixelFunction_t	getPixel,
		bool	rle,
		bufferStore &	out
	)

Convert an image into a bitmap in Psion format.

Parameters

width	The width of the image to convert.
height	The height of the image to convert.
getPixel	Pointer to a function for retrieving pixel values.
rle	Flag: Perform RLE compression (currently ignored).
out	Output buffer; gets filled with the Psion representation of the converted image.

Definition at line 26 of file psibitmap.cpp.