BlockMap BlockMap_Construct(const Size *pixelSize, int maxBlockSize)
{
BlockMap bm;
bm.pixelCount = *pixelSize;
bm.blockCount = Size_Construct(Calc_DivRoundUp(bm.pixelCount.width, maxBlockSize),
Calc_DivRoundUp(bm.pixelCount.height, maxBlockSize));
bm.cornerCount = BlockToCornerCount(&bm.blockCount);
bm.allBlocks = RectangleC_ConstructFromSize(&bm.blockCount);
bm.allCorners = RectangleC_ConstructFromSize(&bm.cornerCount);
bm.corners = InitCorners(&bm);
bm.blockAreas = RectangleGrid_Construct(&bm.corners);
bm.blockCenters = InitBlockCenters(&bm);
bm.cornerAreas = InitCornerAreas(&bm);
return bm;
}
static RectangleGrid InitCornerAreas(const BlockMap *me)
{
Size s = Size_Construct(me->cornerCount.width + 1, me->cornerCount.height + 1);
PointGrid grid = PointGrid_Construct(&s);
grid.allY.data[0] = 0;
for (int y = 0; y < me->blockCount.height; ++y)
{
Point p = PointGrid_GetPointFromCoordinates(&me->blockCenters, y, 0);
grid.allY.data[y + 1] = p.y;
}
grid.allY.data[me->blockCount.height] = me->pixelCount.height;
grid.allX.data[0] = 0;
for (int x = 0; x < me->blockCount.width; ++x)
{
Point p = PointGrid_GetPointFromCoordinates(&me->blockCenters, 0, x);
grid.allX.data[x + 1] = p.x;
}
grid.allX.data[me->blockCount.width] = me->pixelCount.width;
return RectangleGrid_Construct(&grid);
}
Size RectangleC_GetSize(const RectangleC *me)
{
return Size_Construct(me->width, me->height);
}
static Size BlockToCornerCount(const Size *blockCount)
{
return Size_Construct(blockCount->width + 1, blockCount->height + 1);
}
