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ultimatepp/bazaar/PixRaster/lib/fpix1.c
micio db3a6a0036 Start of Leptonica library support 
git-svn-id: svn://ultimatepp.org/upp/trunk@1554 f0d560ea-af0d-0410-9eb7-867de7ffcac7
2009-09-06 15:49:56 +00:00

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/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
- This software is distributed in the hope that it will be
- useful, but with NO WARRANTY OF ANY KIND.
- No author or distributor accepts responsibility to anyone for the
- consequences of using this software, or for whether it serves any
- particular purpose or works at all, unless he or she says so in
- writing. Everyone is granted permission to copy, modify and
- redistribute this source code, for commercial or non-commercial
- purposes, with the following restrictions: (1) the origin of this
- source code must not be misrepresented; (2) modified versions must
- be plainly marked as such; and (3) this notice may not be removed
- or altered from any source or modified source distribution.
*====================================================================*/
/*
* fpix1.c
*
* This file has basic constructors, destructors and field accessors
* for FPix and DPix.
*
* FPix Create/copy/destroy
* FPIX *fpixCreate()
* FPIX *fpixCreateTemplate()
* FPIX *fpixClone()
* FPIX *fpixCopy()
* l_int32 fpixResizeImageData()
* void fpixDestroy()
*
* FPix accessors
* l_int32 fpixGetDimensions()
* l_int32 fpixSetDimensions()
* l_int32 fpixGetWpl()
* l_int32 fpixSetWpl()
* l_int32 fpixGetRefcount()
* l_int32 fpixChangeRefcount()
* l_int32 fpixGetResolution()
* l_int32 fpixSetResolution()
* l_int32 fpixCopyResolution()
* l_float32 *fpixGetData()
* l_int32 fpixSetData()
*
* DPix Create/copy/destroy
* DPIX *dpixCreate()
* DPIX *dpixCreateTemplate()
* DPIX *dpixClone()
* DPIX *dpixCopy()
* l_int32 dpixResizeImageData()
* void dpixDestroy()
*
* DPix accessors
* l_int32 dpixGetDimensions()
* l_int32 dpixSetDimensions()
* l_int32 dpixGetWpl()
* l_int32 dpixSetWpl()
* l_int32 dpixGetRefcount()
* l_int32 dpixChangeRefcount()
* l_int32 dpixGetResolution()
* l_int32 dpixSetResolution()
* l_int32 dpixCopyResolution()
* l_float64 *dpixGetData()
* l_int32 dpixSetData()
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "allheaders.h"
/*--------------------------------------------------------------------*
* FPix Create/copy/destroy *
*--------------------------------------------------------------------*/
/*!
* fpixCreate()
*
* Input: width, height
* Return: fpixd (with data allocated and initialized to 0),
* or null on error
*
* Notes:
* (1) Makes a FPix of specified size, with the data array
* allocated and initialized to 0.
*/
FPIX *
fpixCreate(l_int32 width,
l_int32 height)
{
l_float32 *data;
FPIX *fpixd;
PROCNAME("fpixCreate");
if (width <= 0)
return (FPIX *)ERROR_PTR("width must be > 0", procName, NULL);
if (height <= 0)
return (FPIX *)ERROR_PTR("height must be > 0", procName, NULL);
if ((fpixd = (FPIX *)CALLOC(1, sizeof(FPIX))) == NULL)
return (FPIX *)ERROR_PTR("CALLOC fail for fpixd", procName, NULL);
fpixSetDimensions(fpixd, width, height);
fpixSetWpl(fpixd, width);
fpixd->refcount = 1;
data = (l_float32 *)CALLOC(width * height, sizeof(l_float32));
if (!data)
return (FPIX *)ERROR_PTR("CALLOC fail for data", procName, NULL);
fpixSetData(fpixd, data);
return fpixd;
}
/*!
* fpixCreateTemplate()
*
* Input: fpixs
* Return: fpixd, or null on error
*
* Notes:
* (1) Makes a FPix of the same size as the input FPix, with the
* data array allocated and initialized to 0.
* (2) Copies the resolution.
*/
FPIX *
fpixCreateTemplate(FPIX *fpixs)
{
l_int32 w, h;
FPIX *fpixd;
PROCNAME("fpixCreateTemplate");
if (!fpixs)
return (FPIX *)ERROR_PTR("fpixs not defined", procName, NULL);
fpixGetDimensions(fpixs, &w, &h);
fpixd = fpixCreate(w, h);
fpixCopyResolution(fpixd, fpixs);
return fpixd;
}
/*!
* fpixClone()
*
* Input: fpix
* Return: same fpix (ptr), or null on error
*
* Notes:
* (1) See pixClone() for definition and usage.
*/
FPIX *
fpixClone(FPIX *fpix)
{
PROCNAME("fpixClone");
if (!fpix)
return (FPIX *)ERROR_PTR("fpix not defined", procName, NULL);
fpixChangeRefcount(fpix, 1);
return fpix;
}
/*!
* fpixCopy()
*
* Input: fpixd (<optional>; can be null, or equal to fpixs,
* or different from fpixs)
* fpixs
* Return: fpixd, or null on error
*
* Notes:
* (1) There are three cases:
* (a) fpixd == null (makes a new fpix; refcount = 1)
* (b) fpixd == fpixs (no-op)
* (c) fpixd != fpixs (data copy; no change in refcount)
* If the refcount of fpixd > 1, case (c) will side-effect
* these handles.
* (2) The general pattern of use is:
* fpixd = fpixCopy(fpixd, fpixs);
* This will work for all three cases.
* For clarity when the case is known, you can use:
* (a) fpixd = fpixCopy(NULL, fpixs);
* (c) fpixCopy(fpixd, fpixs);
* (3) For case (c), we check if fpixs and fpixd are the same size.
* If so, the data is copied directly.
* Otherwise, the data is reallocated to the correct size
* and the copy proceeds. The refcount of fpixd is unchanged.
* (4) This operation, like all others that may involve a pre-existing
* fpixd, will side-effect any existing clones of fpixd.
*/
FPIX *
fpixCopy(FPIX *fpixd, /* can be null */
FPIX *fpixs)
{
l_int32 w, h, bytes;
l_float32 *datas, *datad;
PROCNAME("fpixCopy");
if (!fpixs)
return (FPIX *)ERROR_PTR("fpixs not defined", procName, NULL);
if (fpixs == fpixd)
return fpixd;
/* Total bytes in image data */
fpixGetDimensions(fpixs, &w, &h);
bytes = 4 * w * h;
/* If we're making a new fpix ... */
if (!fpixd) {
if ((fpixd = fpixCreateTemplate(fpixs)) == NULL)
return (FPIX *)ERROR_PTR("fpixd not made", procName, NULL);
datas = fpixGetData(fpixs);
datad = fpixGetData(fpixd);
memcpy((char *)datad, (char *)datas, bytes);
return fpixd;
}
/* Reallocate image data if sizes are different */
fpixResizeImageData(fpixd, fpixs);
/* Copy data */
fpixCopyResolution(fpixd, fpixs);
datas = fpixGetData(fpixs);
datad = fpixGetData(fpixd);
memcpy((char*)datad, (char*)datas, bytes);
return fpixd;
}
/*!
* fpixResizeImageData()
*
* Input: fpixd, fpixs
* Return: 0 if OK, 1 on error
*/
l_int32
fpixResizeImageData(FPIX *fpixd,
FPIX *fpixs)
{
l_int32 ws, hs, wd, hd, bytes;
l_float32 *data;
PROCNAME("fpixResizeImageData");
if (!fpixs)
return ERROR_INT("fpixs not defined", procName, 1);
if (!fpixd)
return ERROR_INT("fpixd not defined", procName, 1);
fpixGetDimensions(fpixs, &ws, &hs);
fpixGetDimensions(fpixd, &wd, &hd);
if (ws == wd && hs == hd) /* nothing to do */
return 0;
fpixSetDimensions(fpixd, ws, hs);
fpixSetWpl(fpixd, ws);
bytes = 4 * ws * hs;
data = fpixGetData(fpixd);
if (data) FREE(data);
if ((data = (l_float32 *)MALLOC(bytes)) == NULL)
return ERROR_INT("MALLOC fail for data", procName, 1);
fpixSetData(fpixd, data);
return 0;
}
/*!
* fpixDestroy()
*
* Input: &fpix <will be nulled>
* Return: void
*
* Notes:
* (1) Decrements the ref count and, if 0, destroys the fpix.
* (2) Always nulls the input ptr.
*/
void
fpixDestroy(FPIX **pfpix)
{
l_float32 *data;
FPIX *fpix;
PROCNAME("fpixDestroy");
if (!pfpix) {
L_WARNING("ptr address is null!", procName);
return;
}
if ((fpix = *pfpix) == NULL)
return;
/* Decrement the ref count. If it is 0, destroy the fpix. */
fpixChangeRefcount(fpix, -1);
if (fpixGetRefcount(fpix) <= 0) {
if ((data = fpixGetData(fpix)) != NULL)
FREE(data);
FREE(fpix);
}
*pfpix = NULL;
return;
}
/*--------------------------------------------------------------------*
* FPix Accessors *
*--------------------------------------------------------------------*/
/*!
* fpixGetDimensions()
*
* Input: fpix
* &w, &h (<optional return>; each can be null)
* Return: 0 if OK, 1 on error
*/
l_int32
fpixGetDimensions(FPIX *fpix,
l_int32 *pw,
l_int32 *ph)
{
PROCNAME("fpixGetDimensions");
if (!fpix)
return ERROR_INT("fpix not defined", procName, 1);
if (pw) *pw = fpix->w;
if (ph) *ph = fpix->h;
return 0;
}
/*!
* fpixSetDimensions()
*
* Input: fpix
* w, h
* Return: 0 if OK, 1 on error
*/
l_int32
fpixSetDimensions(FPIX *fpix,
l_int32 w,
l_int32 h)
{
PROCNAME("fpixSetDimensions");
if (!fpix)
return ERROR_INT("fpix not defined", procName, 1);
fpix->w = w;
fpix->h = h;
return 0;
}
l_int32
fpixGetWpl(FPIX *fpix)
{
PROCNAME("fpixGetWpl");
if (!fpix)
return ERROR_INT("fpix not defined", procName, 1);
return fpix->wpl;
}
l_int32
fpixSetWpl(FPIX *fpix,
l_int32 wpl)
{
PROCNAME("fpixSetWpl");
if (!fpix)
return ERROR_INT("fpix not defined", procName, 1);
fpix->wpl = wpl;
return 0;
}
l_int32
fpixGetRefcount(FPIX *fpix)
{
PROCNAME("fpixGetRefcount");
if (!fpix)
return ERROR_INT("fpix not defined", procName, UNDEF);
return fpix->refcount;
}
l_int32
fpixChangeRefcount(FPIX *fpix,
l_int32 delta)
{
PROCNAME("fpixChangeRefcount");
if (!fpix)
return ERROR_INT("fpix not defined", procName, 1);
fpix->refcount += delta;
return 0;
}
l_int32
fpixGetResolution(FPIX *fpix,
l_int32 *pxres,
l_int32 *pyres)
{
PROCNAME("fpixGetResolution");
if (!fpix)
return ERROR_INT("fpix not defined", procName, 1);
if (pxres) *pxres = fpix->xres;
if (pyres) *pyres = fpix->yres;
return 0;
}
l_int32
fpixSetResolution(FPIX *fpix,
l_int32 xres,
l_int32 yres)
{
PROCNAME("fpixSetResolution");
if (!fpix)
return ERROR_INT("fpix not defined", procName, 1);
fpix->xres = xres;
fpix->yres = yres;
return 0;
}
l_int32
fpixCopyResolution(FPIX *fpixd,
FPIX *fpixs)
{
l_int32 xres, yres;
PROCNAME("fpixCopyResolution");
if (!fpixs || !fpixd)
return ERROR_INT("fpixs and fpixd not both defined", procName, 1);
fpixGetResolution(fpixs, &xres, &yres);
fpixSetResolution(fpixd, xres, yres);
return 0;
}
l_float32 *
fpixGetData(FPIX *fpix)
{
PROCNAME("fpixGetData");
if (!fpix)
return (l_float32 *)ERROR_PTR("fpix not defined", procName, NULL);
return fpix->data;
}
l_int32
fpixSetData(FPIX *fpix,
l_float32 *data)
{
PROCNAME("fpixSetData");
if (!fpix)
return ERROR_INT("fpix not defined", procName, 1);
fpix->data = data;
return 0;
}
/*--------------------------------------------------------------------*
* DPix Create/copy/destroy *
*--------------------------------------------------------------------*/
/*!
* dpixCreate()
*
* Input: width, height
* Return: dpix (with data allocated and initialized to 0),
* or null on error
*
* Notes:
* (1) Makes a DPix of specified size, with the data array
* allocated and initialized to 0.
*/
DPIX *
dpixCreate(l_int32 width,
l_int32 height)
{
l_float64 *data;
DPIX *dpix;
PROCNAME("dpixCreate");
if (width <= 0)
return (DPIX *)ERROR_PTR("width must be > 0", procName, NULL);
if (height <= 0)
return (DPIX *)ERROR_PTR("height must be > 0", procName, NULL);
if ((dpix = (DPIX *)CALLOC(1, sizeof(DPIX))) == NULL)
return (DPIX *)ERROR_PTR("CALLOC fail for dpix", procName, NULL);
dpixSetDimensions(dpix, width, height);
dpixSetWpl(dpix, width);
dpix->refcount = 1;
data = (l_float64 *)CALLOC(width * height, sizeof(l_float64));
if (!data)
return (DPIX *)ERROR_PTR("CALLOC fail for data", procName, NULL);
dpixSetData(dpix, data);
return dpix;
}
/*!
* dpixCreateTemplate()
*
* Input: dpixs
* Return: dpixd, or null on error
*
* Notes:
* (1) Makes a DPix of the same size as the input DPix, with the
* data array allocated and initialized to 0.
* (2) Copies the resolution.
*/
DPIX *
dpixCreateTemplate(DPIX *dpixs)
{
l_int32 w, h;
DPIX *dpixd;
PROCNAME("dpixCreateTemplate");
if (!dpixs)
return (DPIX *)ERROR_PTR("dpixs not defined", procName, NULL);
dpixGetDimensions(dpixs, &w, &h);
dpixd = dpixCreate(w, h);
dpixCopyResolution(dpixd, dpixs);
return dpixd;
}
/*!
* dpixClone()
*
* Input: dpix
* Return: same dpix (ptr), or null on error
*
* Notes:
* (1) See pixClone() for definition and usage.
*/
DPIX *
dpixClone(DPIX *dpix)
{
PROCNAME("dpixClone");
if (!dpix)
return (DPIX *)ERROR_PTR("dpix not defined", procName, NULL);
dpixChangeRefcount(dpix, 1);
return dpix;
}
/*!
* dpixCopy()
*
* Input: dpixd (<optional>; can be null, or equal to dpixs,
* or different from dpixs)
* dpixs
* Return: dpixd, or null on error
*
* Notes:
* (1) There are three cases:
* (a) dpixd == null (makes a new dpix; refcount = 1)
* (b) dpixd == dpixs (no-op)
* (c) dpixd != dpixs (data copy; no change in refcount)
* If the refcount of dpixd > 1, case (c) will side-effect
* these handles.
* (2) The general pattern of use is:
* dpixd = dpixCopy(dpixd, dpixs);
* This will work for all three cases.
* For clarity when the case is known, you can use:
* (a) dpixd = dpixCopy(NULL, dpixs);
* (c) dpixCopy(dpixd, dpixs);
* (3) For case (c), we check if dpixs and dpixd are the same size.
* If so, the data is copied directly.
* Otherwise, the data is reallocated to the correct size
* and the copy proceeds. The refcount of dpixd is unchanged.
* (4) This operation, like all others that may involve a pre-existing
* dpixd, will side-effect any existing clones of dpixd.
*/
DPIX *
dpixCopy(DPIX *dpixd, /* can be null */
DPIX *dpixs)
{
l_int32 w, h, bytes;
l_float64 *datas, *datad;
PROCNAME("dpixCopy");
if (!dpixs)
return (DPIX *)ERROR_PTR("dpixs not defined", procName, NULL);
if (dpixs == dpixd)
return dpixd;
/* Total bytes in image data */
dpixGetDimensions(dpixs, &w, &h);
bytes = 8 * w * h;
/* If we're making a new dpix ... */
if (!dpixd) {
if ((dpixd = dpixCreateTemplate(dpixs)) == NULL)
return (DPIX *)ERROR_PTR("dpixd not made", procName, NULL);
datas = dpixGetData(dpixs);
datad = dpixGetData(dpixd);
memcpy((char *)datad, (char *)datas, bytes);
return dpixd;
}
/* Reallocate image data if sizes are different */
dpixResizeImageData(dpixd, dpixs);
/* Copy data */
dpixCopyResolution(dpixd, dpixs);
datas = dpixGetData(dpixs);
datad = dpixGetData(dpixd);
memcpy((char*)datad, (char*)datas, bytes);
return dpixd;
}
/*!
* dpixResizeImageData()
*
* Input: dpixd, dpixs
* Return: 0 if OK, 1 on error
*/
l_int32
dpixResizeImageData(DPIX *dpixd,
DPIX *dpixs)
{
l_int32 ws, hs, wd, hd, bytes;
l_float64 *data;
PROCNAME("dpixResizeImageData");
if (!dpixs)
return ERROR_INT("dpixs not defined", procName, 1);
if (!dpixd)
return ERROR_INT("dpixd not defined", procName, 1);
dpixGetDimensions(dpixs, &ws, &hs);
dpixGetDimensions(dpixd, &wd, &hd);
if (ws == wd && hs == hd) /* nothing to do */
return 0;
dpixSetDimensions(dpixd, ws, hs);
dpixSetWpl(dpixd, ws);
bytes = 8 * ws * hs;
data = dpixGetData(dpixd);
if (data) FREE(data);
if ((data = (l_float64 *)MALLOC(bytes)) == NULL)
return ERROR_INT("MALLOC fail for data", procName, 1);
dpixSetData(dpixd, data);
return 0;
}
/*!
* dpixDestroy()
*
* Input: &dpix <will be nulled>
* Return: void
*
* Notes:
* (1) Decrements the ref count and, if 0, destroys the dpix.
* (2) Always nulls the input ptr.
*/
void
dpixDestroy(DPIX **pdpix)
{
l_float64 *data;
DPIX *dpix;
PROCNAME("dpixDestroy");
if (!pdpix) {
L_WARNING("ptr address is null!", procName);
return;
}
if ((dpix = *pdpix) == NULL)
return;
/* Decrement the ref count. If it is 0, destroy the dpix. */
dpixChangeRefcount(dpix, -1);
if (dpixGetRefcount(dpix) <= 0) {
if ((data = dpixGetData(dpix)) != NULL)
FREE(data);
FREE(dpix);
}
*pdpix = NULL;
return;
}
/*--------------------------------------------------------------------*
* DPix Accessors *
*--------------------------------------------------------------------*/
/*!
* dpixGetDimensions()
*
* Input: dpix
* &w, &h (<optional return>; each can be null)
* Return: 0 if OK, 1 on error
*/
l_int32
dpixGetDimensions(DPIX *dpix,
l_int32 *pw,
l_int32 *ph)
{
PROCNAME("dpixGetDimensions");
if (!dpix)
return ERROR_INT("dpix not defined", procName, 1);
if (pw) *pw = dpix->w;
if (ph) *ph = dpix->h;
return 0;
}
/*!
* dpixSetDimensions()
*
* Input: dpix
* w, h
* Return: 0 if OK, 1 on error
*/
l_int32
dpixSetDimensions(DPIX *dpix,
l_int32 w,
l_int32 h)
{
PROCNAME("dpixSetDimensions");
if (!dpix)
return ERROR_INT("dpix not defined", procName, 1);
dpix->w = w;
dpix->h = h;
return 0;
}
l_int32
dpixGetWpl(DPIX *dpix)
{
PROCNAME("dpixGetWpl");
if (!dpix)
return ERROR_INT("dpix not defined", procName, 1);
return dpix->wpl;
}
l_int32
dpixSetWpl(DPIX *dpix,
l_int32 wpl)
{
PROCNAME("dpixSetWpl");
if (!dpix)
return ERROR_INT("dpix not defined", procName, 1);
dpix->wpl = wpl;
return 0;
}
l_int32
dpixGetRefcount(DPIX *dpix)
{
PROCNAME("dpixGetRefcount");
if (!dpix)
return ERROR_INT("dpix not defined", procName, UNDEF);
return dpix->refcount;
}
l_int32
dpixChangeRefcount(DPIX *dpix,
l_int32 delta)
{
PROCNAME("dpixChangeRefcount");
if (!dpix)
return ERROR_INT("dpix not defined", procName, 1);
dpix->refcount += delta;
return 0;
}
l_int32
dpixGetResolution(DPIX *dpix,
l_int32 *pxres,
l_int32 *pyres)
{
PROCNAME("dpixGetResolution");
if (!dpix)
return ERROR_INT("dpix not defined", procName, 1);
if (pxres) *pxres = dpix->xres;
if (pyres) *pyres = dpix->yres;
return 0;
}
l_int32
dpixSetResolution(DPIX *dpix,
l_int32 xres,
l_int32 yres)
{
PROCNAME("dpixSetResolution");
if (!dpix)
return ERROR_INT("dpix not defined", procName, 1);
dpix->xres = xres;
dpix->yres = yres;
return 0;
}
l_int32
dpixCopyResolution(DPIX *dpixd,
DPIX *dpixs)
{
l_int32 xres, yres;
PROCNAME("dpixCopyResolution");
if (!dpixs || !dpixd)
return ERROR_INT("dpixs and dpixd not both defined", procName, 1);
dpixGetResolution(dpixs, &xres, &yres);
dpixSetResolution(dpixd, xres, yres);
return 0;
}
l_float64 *
dpixGetData(DPIX *dpix)
{
PROCNAME("dpixGetData");
if (!dpix)
return (l_float64 *)ERROR_PTR("dpix not defined", procName, NULL);
return dpix->data;
}
l_int32
dpixSetData(DPIX *dpix,
l_float64 *data)
{
PROCNAME("dpixSetData");
if (!dpix)
return ERROR_INT("dpix not defined", procName, 1);
dpix->data = data;
return 0;
}
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