private void PackItemsToAtlas(List <TextureTools.AtlasItem> items, Size atlasSize, out double packRate)
{
items.ForEach(i => i.Allocated = false);
// Reserve space for default one-pixel padding.
atlasSize.Width += 2;
atlasSize.Height += 2;
var rectAllocator = new RectAllocator(atlasSize);
TextureTools.AtlasItem firstAllocatedItem = null;
foreach (var item in items)
{
var padding = item.CookingRules.AtlasItemPadding;
var paddedItemSize = new Size(item.BitmapInfo.Width + padding * 2, item.BitmapInfo.Height + padding * 2);
if (firstAllocatedItem == null || AreAtlasItemsCompatible(items, firstAllocatedItem, item))
{
if (rectAllocator.Allocate(paddedItemSize, out item.AtlasRect))
{
item.Allocated = true;
firstAllocatedItem = firstAllocatedItem ?? item;
}
}
}
packRate = rectAllocator.GetPackRate();
// Adjust item rects according to theirs paddings.
foreach (var item in items)
{
if (!item.Allocated)
{
continue;
}
var atlasRect = item.AtlasRect;
atlasRect.A += new IntVector2(item.CookingRules.AtlasItemPadding);
atlasRect.B -= new IntVector2(item.CookingRules.AtlasItemPadding);
// Don't leave space between item rectangle and texture boundaries for items with 1 pixel padding.
if (item.CookingRules.AtlasItemPadding == 1)
{
atlasRect.A -= new IntVector2(1);
atlasRect.B -= new IntVector2(1);
}
item.AtlasRect = atlasRect;
}
}
private static void PackItemsToAtlas(List <AtlasItem> items, Size size, out double packRate)
{
items.ForEach(i => i.Allocated = false);
// Take in account 1 pixel border for each side.
var a = new RectAllocator(new Size(size.Width + 2, size.Height + 2));
AtlasItem firstAllocatedItem = null;
foreach (var item in items)
{
var sz = new Size(item.Bitmap.Width + 2, item.Bitmap.Height + 2);
if (firstAllocatedItem == null || AreAtlasItemsCompatible(items, firstAllocatedItem, item))
{
if (a.Allocate(sz, out item.AtlasRect))
{
item.Allocated = true;
firstAllocatedItem = firstAllocatedItem ?? item;
}
}
}
packRate = a.GetPackRate();
}