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/**
* libdmtx - Data Matrix Encoding/Decoding Library
* Copyright 2010 Mike Laughton. All rights reserved.
*
* See LICENSE file in the main project directory for full
* terms of use and distribution.
*
* Contact: Mike Laughton <mike@dragonflylogic.com>
*
* \file dmtxaccel.c
*/
#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include <assert.h>
#include "../../dmtx.h"
#include "multi_test.h"
/**
*
*
*/
DmtxAccel *
AccelCreate(DmtxSobel *sobel)
{
int sWidth, sHeight;
int vWidth, vHeight;
int hWidth, hHeight;
DmtxAccel *accel;
accel = (DmtxAccel *)calloc(1, sizeof(DmtxAccel));
if(accel == NULL)
return NULL;
sWidth = dmtxValueGridGetWidth(sobel->v);
sHeight = dmtxValueGridGetHeight(sobel->v);
vWidth = sWidth - 1;
vHeight = sHeight;
hWidth = sWidth;
hHeight = sHeight - 1;
accel->vv = dmtxValueGridCreate(vWidth, vHeight, DmtxEdgeVertical, sobel->v);
accel->vb = dmtxValueGridCreate(vWidth, vHeight, DmtxEdgeVertical, sobel->b);
accel->vs = dmtxValueGridCreate(vWidth, vHeight, DmtxEdgeVertical, sobel->s);
accel->hb = dmtxValueGridCreate(hWidth, hHeight, DmtxEdgeHorizontal, sobel->b);
accel->hh = dmtxValueGridCreate(hWidth, hHeight, DmtxEdgeHorizontal, sobel->h);
accel->hs = dmtxValueGridCreate(hWidth, hHeight, DmtxEdgeHorizontal, sobel->s);
if(accel->vv == NULL || accel->vb == NULL || accel->vs == NULL ||
accel->hb == NULL || accel->hh == NULL || accel->hs == NULL)
{
AccelDestroy(&accel);
return NULL;
}
return accel;
}
/**
*
*
*/
DmtxPassFail
AccelDestroy(DmtxAccel **accel)
{
if(accel == NULL || *accel == NULL)
return DmtxFail;
dmtxValueGridDestroy(&((*accel)->vs));
dmtxValueGridDestroy(&((*accel)->hs));
dmtxValueGridDestroy(&((*accel)->hh));
dmtxValueGridDestroy(&((*accel)->hb));
dmtxValueGridDestroy(&((*accel)->vb));
dmtxValueGridDestroy(&((*accel)->vv));
free(*accel);
*accel = NULL;
return DmtxPass;
}
#define RETURN_FAIL_IF(c) if(c) { return DmtxFail; }
/**
*
*
*/
DmtxPassFail
AccelPopulate(DmtxDecode2 *dec)
{
DmtxAccel *accel;
assert(dec != NULL && dec->accel != NULL);
accel = dec->accel;
RETURN_FAIL_IF(AccelPopulateLocal(accel->vv) == DmtxFail);
RETURN_FAIL_IF(AccelPopulateLocal(accel->vb) == DmtxFail);
RETURN_FAIL_IF(AccelPopulateLocal(accel->hb) == DmtxFail);
RETURN_FAIL_IF(AccelPopulateLocal(accel->hh) == DmtxFail);
RETURN_FAIL_IF(AccelPopulateLocal(accel->hs) == DmtxFail);
RETURN_FAIL_IF(AccelPopulateLocal(accel->vs) == DmtxFail);
dec->fn.dmtxValueGridCallback(accel->vv, 4);
dec->fn.dmtxValueGridCallback(accel->vb, 5);
dec->fn.dmtxValueGridCallback(accel->hb, 7);
dec->fn.dmtxValueGridCallback(accel->hh, 8);
dec->fn.dmtxValueGridCallback(accel->hs, 9);
dec->fn.dmtxValueGridCallback(accel->vs, 6);
return DmtxPass;
}
#undef RETURN_FAIL_IF
/**
*
*
*/
DmtxPassFail
AccelPopulateLocal(DmtxValueGrid *acc)
{
int sWidth, sHeight;
int aWidth, aHeight;
int sIdx, sIdxNext, sInc, aIdx;
int x, y;
DmtxValueGrid *sob;
sob = acc->ref;
sWidth = dmtxValueGridGetWidth(sob);
sHeight = dmtxValueGridGetHeight(sob);
switch(acc->type) {
case DmtxEdgeVertical:
aWidth = sWidth - 1;
aHeight = sHeight;
sInc = 1;
break;
case DmtxEdgeHorizontal:
aWidth = sWidth;
aHeight = sHeight - 1;
sInc = sWidth;
break;
default:
return DmtxFail;
}
for(y = 0; y < aHeight; y++)
{
sIdx = y * sWidth;
aIdx = y * aWidth;
for(x = 0; x < aWidth; x++)
{
sIdxNext = sIdx + sInc;
acc->value[aIdx] = sob->value[sIdxNext] - sob->value[sIdx];
aIdx++;
sIdx++;
}
}
return DmtxPass;
}
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