binexpand.c File Reference

#include <string.h>
#include "allheaders.h"

Go to the source code of this file.

Functions
static l_uint16 *	makeExpandTab2x (void)
static l_uint32 *	makeExpandTab4x (void)
static l_uint32 *	makeExpandTab8x (void)
PIX *	pixExpandBinaryReplicate (PIX *pixs, l_int32 xfact, l_int32 yfact)
PIX *	pixExpandBinaryPower2 (PIX *pixs, l_int32 factor)

Variables
static l_uint32	expandtab16 []

Detailed Description

     Replicated expansion (integer scaling)
        PIX     *pixExpandBinaryReplicate()

     Special case: power of 2 replicated expansion
        PIX     *pixExpandBinaryPower2()

     Expansion tables for power of 2 expansion
        static l_uint16    *makeExpandTab2x()
        static l_uint32    *makeExpandTab4x()
        static l_uint32    *makeExpandTab8x()

Definition in file binexpand.c.

Function Documentation

makeExpandTab2x()

static l_uint16 * makeExpandTab2x ( void )

static

Definition at line 225 of file binexpand.c.

makeExpandTab4x()

static l_uint32 * makeExpandTab4x ( void )

static

Definition at line 254 of file binexpand.c.

makeExpandTab8x()

static l_uint32 * makeExpandTab8x ( void )

static

Definition at line 283 of file binexpand.c.

pixExpandBinaryPower2()

PIX * pixExpandBinaryPower2	(	PIX *	pixs,
		l_int32	factor )

pixExpandBinaryPower2()

Parameters

[in]	pixs	1 bpp
[in]	factor	expansion factor: 1, 2, 4, 8, 16

Returns

pixd expanded 1 bpp by replication, or NULL on error

Definition at line 133 of file binexpand.c.

References GET_DATA_BYTE, GET_DATA_DIBIT, GET_DATA_QBIT, and SET_DATA_TWO_BYTES.

Referenced by pixExpandBinaryReplicate().

pixExpandBinaryReplicate()

PIX * pixExpandBinaryReplicate	(	PIX *	pixs,
		l_int32	xfact,
		l_int32	yfact )

pixExpandBinaryReplicate()

Parameters

[in]	pixs	1 bpp
[in]	xfact	integer scale factor for horiz. replicative expansion
[in]	yfact	integer scale factor for vertical replicative expansion

Returns

pixd scaled up, or NULL on error

Definition at line 70 of file binexpand.c.

References GET_DATA_BIT, pixExpandBinaryPower2(), and SET_DATA_BIT.

Variable Documentation

expandtab16

l_uint32 expandtab16[]

static

Initial value:

= {
              0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff}

Definition at line 55 of file binexpand.c.