Image::Leptonica::Func::arrayaccess
version 0.04
arrayaccess.c
arrayaccess.c Access within an array of 32-bit words l_int32 l_getDataBit() void l_setDataBit() void l_clearDataBit() void l_setDataBitVal() l_int32 l_getDataDibit() void l_setDataDibit() void l_clearDataDibit() l_int32 l_getDataQbit() void l_setDataQbit() void l_clearDataQbit() l_int32 l_getDataByte() void l_setDataByte() l_int32 l_getDataTwoBytes() void l_setDataTwoBytes() l_int32 l_getDataFourBytes() void l_setDataFourBytes() Note that these all require 32-bit alignment, and hence an input ptr to l_uint32. However, this is not enforced by the compiler. Instead, we allow the use of a void* ptr, because the line ptrs are an efficient way to get random access (see pixGetLinePtrs()). It is then necessary to cast internally within each function because ptr arithmetic requires knowing the size of the units being referenced.
void l_clearDataBit ( void *line, l_int32 n )
l_clearDataBit() Input: line (ptr to beginning of data line) n (pixel index) Return: void Action: sets the (1-bit) pixel to 0
void l_clearDataDibit ( void *line, l_int32 n )
l_clearDataDibit() Input: line (ptr to beginning of data line) n (pixel index) Return: void Action: sets the (2-bit) pixel to 0
void l_clearDataQbit ( void *line, l_int32 n )
l_clearDataQbit() Input: line (ptr to beginning of data line) n (pixel index) Return: void Action: sets the (4-bit) pixel to 0
l_int32 l_getDataBit ( void *line, l_int32 n )
l_getDataBit() Input: line (ptr to beginning of data line) n (pixel index) Return: val of the nth (1-bit) pixel.
l_int32 l_getDataByte ( void *line, l_int32 n )
l_getDataByte() Input: line (ptr to beginning of data line) n (pixel index) Return: value of the n-th (byte) pixel
l_int32 l_getDataDibit ( void *line, l_int32 n )
l_getDataDibit() Input: line (ptr to beginning of data line) n (pixel index) Return: val of the nth (2-bit) pixel.
l_int32 l_getDataFourBytes ( void *line, l_int32 n )
l_getDataFourBytes() Input: line (ptr to beginning of data line) n (pixel index) Return: value of the n-th (4-byte) pixel
l_int32 l_getDataQbit ( void *line, l_int32 n )
l_getDataQbit() Input: line (ptr to beginning of data line) n (pixel index) Return: val of the nth (4-bit) pixel.
l_int32 l_getDataTwoBytes ( void *line, l_int32 n )
l_getDataTwoBytes() Input: line (ptr to beginning of data line) n (pixel index) Return: value of the n-th (2-byte) pixel
void l_setDataBit ( void *line, l_int32 n )
l_setDataBit() Input: line (ptr to beginning of data line) n (pixel index) Return: void Action: sets the pixel to 1
void l_setDataBitVal ( void *line, l_int32 n, l_int32 val )
l_setDataBitVal() Input: line (ptr to beginning of data line) n (pixel index) val (val to be inserted: 0 or 1) Return: void Notes: (1) This is an accessor for a 1 bpp pix. (2) It is actually a little slower than using: if (val == 0) l_ClearDataBit(line, n); else l_SetDataBit(line, n);
void l_setDataByte ( void *line, l_int32 n, l_int32 val )
l_setDataByte() Input: line (ptr to beginning of data line) n (pixel index) val (val to be inserted: 0 - 0xff) Return: void
void l_setDataDibit ( void *line, l_int32 n, l_int32 val )
l_setDataDibit() Input: line (ptr to beginning of data line) n (pixel index) val (val to be inserted: 0 - 3) Return: void
void l_setDataFourBytes ( void *line, l_int32 n, l_int32 val )
l_setDataFourBytes() Input: line (ptr to beginning of data line) n (pixel index) val (val to be inserted: 0 - 0xffffffff) Return: void
void l_setDataQbit ( void *line, l_int32 n, l_int32 val )
l_setDataQbit() Input: line (ptr to beginning of data line) n (pixel index) val (val to be inserted: 0 - 0xf) Return: void
void l_setDataTwoBytes ( void *line, l_int32 n, l_int32 val )
l_setDataTwoBytes() Input: line (ptr to beginning of data line) n (pixel index) val (val to be inserted: 0 - 0xffff) Return: void
Zakariyya Mughal <zmughal@cpan.org>
This software is copyright (c) 2014 by Zakariyya Mughal.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
To install Image::Leptonica, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Image::Leptonica
CPAN shell
perl -MCPAN -e shell install Image::Leptonica
For more information on module installation, please visit the detailed CPAN module installation guide.