void test_nextBandWrapDownwards(void **state) {
bandinx = BANDINDEX_160;
next_band(BAND_DOWN);
assert_int_equal(bandinx, BANDINDEX_10);
}
void test_nextBandWrapUpwards(void **state) {
bandinx = BANDINDEX_10;
next_band(BAND_UP);
assert_int_equal(bandinx, BANDINDEX_160);
}
/* test switch to next band UP or DOWN */
void test_nextBandUp(void **state) {
bandinx = BANDINDEX_12;
next_band(BAND_UP);
assert_int_equal(bandinx, BANDINDEX_10);
}
void test_nextBandDown(void **state) {
bandinx = BANDINDEX_12;
next_band(BAND_DOWN);
assert_int_equal(bandinx, BANDINDEX_15);
}
BOOL region16_simplify_bands(REGION16 *region)
{
/** Simplify consecutive bands that touch and have the same items
*
* ==================== ====================
* | 1 | | 2 | | | | |
* ==================== | | | |
* | 1 | | 2 | ====> | 1 | | 2 |
* ==================== | | | |
* | 1 | | 2 | | | | |
* ==================== ====================
*
*/
RECTANGLE_16 *band1, *band2, *endPtr, *endBand, *tmp;
int nbRects, finalNbRects;
int bandItems, toMove;
finalNbRects = nbRects = region16_n_rects(region);
if (nbRects < 2)
return TRUE;
band1 = region16_rects_noconst(region);
endPtr = band1 + nbRects;
do
{
band2 = next_band(band1, endPtr, &bandItems);
if (band2 == endPtr)
break;
if ((band1->bottom == band2->top) && band_match(band1, band2, endPtr))
{
/* adjust the bottom of band1 items */
tmp = band1;
while (tmp < band2)
{
tmp->bottom = band2->bottom;
tmp++;
}
/* override band2, we don't move band1 pointer as the band after band2
* may be merged too */
endBand = band2 + bandItems;
toMove = (endPtr - endBand) * sizeof(RECTANGLE_16);
if (toMove)
MoveMemory(band2, endBand, toMove);
finalNbRects -= bandItems;
endPtr -= bandItems;
}
else
{
band1 = band2;
}
}
while(TRUE);
if (finalNbRects != nbRects)
{
int allocSize = sizeof(REGION16_DATA) + (finalNbRects * sizeof(RECTANGLE_16));
region->data = realloc(region->data, allocSize);
if (!region->data)
{
region->data = &empty_region;
return FALSE;
}
region->data->nbRects = finalNbRects;
region->data->size = allocSize;
}
return TRUE;
}