public Element(Bitmap sheet, Bitmap source, Rectangle bounds, Image.Transform appliedTransform)
{
Sheet = sheet;
Source = source;
Bounds = bounds;
AppliedTransform = appliedTransform;
}
public static BitmapSheet Create(IEnumerable <Bitmap> input, int maxWidth, int maxHeight, int clusterWidth, int clusterHeight, Options options)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
if (maxWidth <= 0)
{
throw new ArgumentException("maxWidth");
}
if (maxHeight <= 0)
{
throw new ArgumentException("maxHeight");
}
#region maxWidth/maxHeight를 2의 멱수로 맞춥니다.
if (options.HasFlag(Options.PowerOfTwoSize))
{
// maxWidth/maxHeight보다 작은 2의 멱수로 맞춥니다.
int mw = MathExtension.GetNearestPowerOfTwo(maxWidth);
int mh = MathExtension.GetNearestPowerOfTwo(maxHeight);
if (maxWidth != mw)
{
maxWidth = mw / 2;
}
if (maxHeight != mh)
{
maxHeight = mh / 2;
}
}
#endregion
foreach (Bitmap item in input)
{
if (item.Width >= maxWidth || item.Height >= maxHeight)
{
throw new ArgumentException("input");
}
}
// Bitmap들을 크기가 큰 순으로 정렬합니다.
var sortedInput = new List <Bitmap>(input);
sortedInput.Sort((a, b) =>
{
// 가로와 세로를 각각 제곱을 하면서 한 방향이 지나치게 클 경우 큰 이미지로 인식하게 합니다.
int aWeight = (a.Width * a.Width) + (a.Height * a.Height);
int bWeight = (b.Width * b.Width) + (b.Height * b.Height);
return(bWeight.CompareTo(aWeight));
});
var items = new List <Tuple <int, Bitmap, Rectangle, Image.Transform> >();
int margin = 2;
var textureAtlases = new List <RectangleStorage>();
#region 각각의 Bitmap들을 어떤 큰 Bitmap에 배치할지 결정합니다. (선작업)
foreach (Bitmap item in sortedInput)
{
// 실제로는 여백을 추가한 크기로 할당합니다.
int aw = margin + item.Width + margin;
int ah = margin + item.Height + margin;
RectangleStorage atlas = null;
int index = -1;
if (options.HasFlag(Options.RotatableMerging))
{
// 병합할 때 변환 가능 Option이 설정되어 있으면 가로 세로를 바꾼 영역도 검색해봅니다.
index = textureAtlases.FindIndex((ta) => ta.CanAllocate(aw, ah) || ta.CanAllocate(ah, aw));
}
else
{
index = textureAtlases.FindIndex((ta) => ta.CanAllocate(aw, ah));
}
if (index != -1)
{
atlas = textureAtlases[index];
}
else
{
atlas = new RectangleStorage(maxWidth, maxHeight, clusterWidth, clusterHeight);
index = textureAtlases.Count;
textureAtlases.Add(atlas);
}
Rectangle rectangle;
Image.Transform appliedTransform;
if (options.HasFlag(Options.RotatableMerging))
{
if (aw * 4 < ah) // 세로 길이가 지나치게 길면 눕히고나서 붙여봅니다.
{
rectangle = atlas.Allocate(ah, aw);
appliedTransform = Image.Transform.RotateCW90;
if (rectangle.IsEmpty)
{
rectangle = atlas.Allocate(aw, ah);
appliedTransform = Image.Transform.Identity;
}
}
else
{
rectangle = atlas.Allocate(aw, ah);
appliedTransform = Image.Transform.Identity;
if (rectangle.IsEmpty)
{
rectangle = atlas.Allocate(ah, aw);
appliedTransform = Image.Transform.RotateCW90;
}
}
}
else
{
rectangle = atlas.Allocate(aw, ah);
appliedTransform = Image.Transform.Identity;
Trace.Assert(!rectangle.IsEmpty);
}
Rectangle bitmapRectangle = Rectangle.FromLTRB(rectangle.Left + margin,
rectangle.Top + margin,
rectangle.Right - margin,
rectangle.Bottom - margin);
items.Add(Tuple.Create(index, item, bitmapRectangle, appliedTransform));
}
#endregion
var graphics = new GDIGraphics[textureAtlases.Count];
var sheetBitmaps = new Bitmap[textureAtlases.Count];
var elements = new List <Element>();
#region 입력된 작은 Bitmap들을 큰 SheetBitmap에 복사합니다.
foreach (var item in items)
{
int sheetIndex = item.Item1;
Bitmap bitmap = item.Item2;
Rectangle rectangle = item.Item3;
Image.Transform appliedTransform = item.Item4;
if (sheetBitmaps[sheetIndex] == null)
{
Rectangle bounds = textureAtlases[item.Item1].GetBounds();
Debug.Assert(bounds.X == 0 && bounds.Y == 0);
int w = bounds.Width;
int h = bounds.Height;
if (options.HasFlag(Options.PowerOfTwoSize))
{
w = MathExtension.GetNearestPowerOfTwo(w);
h = MathExtension.GetNearestPowerOfTwo(h);
}
sheetBitmaps[sheetIndex] = new Bitmap(w, h);
graphics[sheetIndex] = GDIGraphics.FromImage(sheetBitmaps[sheetIndex]);
graphics[sheetIndex].Clear(Color.Transparent);
}
switch (appliedTransform)
{
case Image.Transform.Identity:
{
graphics[sheetIndex].DrawImageUnscaled(bitmap, rectangle.X, rectangle.Y);
graphics[sheetIndex].DrawImage(bitmap, rectangle.Left - 1, rectangle.Top, new Rectangle(0, 0, 1, rectangle.Height), GraphicsUnit.Pixel);
graphics[sheetIndex].DrawImage(bitmap, rectangle.Right, rectangle.Top, new Rectangle(bitmap.Width - 1, 0, 1, rectangle.Height), GraphicsUnit.Pixel);
graphics[sheetIndex].DrawImage(bitmap, rectangle.Left, rectangle.Top - 1, new Rectangle(0, 0, rectangle.Width, 1), GraphicsUnit.Pixel);
graphics[sheetIndex].DrawImage(bitmap, rectangle.Left, rectangle.Bottom, new Rectangle(0, bitmap.Height - 1, rectangle.Width, 1), GraphicsUnit.Pixel);
var sheetBitmap = sheetBitmaps[sheetIndex];
sheetBitmap.SetPixel(rectangle.Left - 1, rectangle.Top - 1, sheetBitmap.GetPixel(rectangle.Left, rectangle.Top));
sheetBitmap.SetPixel(rectangle.Right + 0, rectangle.Top - 1, sheetBitmap.GetPixel(rectangle.Right - 1, rectangle.Top));
sheetBitmap.SetPixel(rectangle.Left - 1, rectangle.Bottom + 0, sheetBitmap.GetPixel(rectangle.Left, rectangle.Bottom - 1));
sheetBitmap.SetPixel(rectangle.Right + 0, rectangle.Bottom + 0, sheetBitmap.GetPixel(rectangle.Right - 1, rectangle.Bottom - 1));
}
break;
case Image.Transform.RotateCW90:
{
graphics[sheetIndex].TranslateTransform(+rectangle.X, +rectangle.Y);
graphics[sheetIndex].RotateTransform(90.0f);
graphics[sheetIndex].TranslateTransform(-rectangle.X, -rectangle.Y - rectangle.Width + 1);
// 임시
//graphics[sheetIndex].DrawImageUnscaled(bitmap, rectangle.X + 0, rectangle.Y - 2);
//graphics[sheetIndex].DrawImageUnscaled(bitmap, rectangle.X - 2, rectangle.Y + 0);
//graphics[sheetIndex].DrawImageUnscaled(bitmap, rectangle.X + 2, rectangle.Y + 0);
//graphics[sheetIndex].DrawImageUnscaled(bitmap, rectangle.X + 0, rectangle.Y + 2);
//graphics[sheetIndex].FillRectangle(Brushes.White, new Rectangle(rectangle.X, rectangle.Y, bitmap.Width, bitmap.Height));
graphics[sheetIndex].DrawImageUnscaled(bitmap, rectangle.X, rectangle.Y);
graphics[sheetIndex].DrawImage(bitmap, rectangle.Left - 1, rectangle.Top, new Rectangle(0, 0, 1, rectangle.Height), GraphicsUnit.Pixel);
graphics[sheetIndex].DrawImage(bitmap, rectangle.Right, rectangle.Top, new Rectangle(bitmap.Width - 1, 0, 1, rectangle.Height), GraphicsUnit.Pixel);
graphics[sheetIndex].DrawImage(bitmap, rectangle.Left, rectangle.Top - 1, new Rectangle(0, 0, rectangle.Width, 1), GraphicsUnit.Pixel);
graphics[sheetIndex].DrawImage(bitmap, rectangle.Left, rectangle.Bottom, new Rectangle(0, bitmap.Height - 1, rectangle.Width, 1), GraphicsUnit.Pixel);
var sheetBitmap = sheetBitmaps[sheetIndex];
sheetBitmap.SetPixel(rectangle.Left - 1, rectangle.Top - 1, sheetBitmap.GetPixel(rectangle.Left, rectangle.Top));
sheetBitmap.SetPixel(rectangle.Right + 0, rectangle.Top - 1, sheetBitmap.GetPixel(rectangle.Right - 1, rectangle.Top));
sheetBitmap.SetPixel(rectangle.Left - 1, rectangle.Bottom + 0, sheetBitmap.GetPixel(rectangle.Left, rectangle.Bottom - 1));
sheetBitmap.SetPixel(rectangle.Right + 0, rectangle.Bottom + 0, sheetBitmap.GetPixel(rectangle.Right - 1, rectangle.Bottom - 1));
graphics[sheetIndex].ResetTransform();
}
break;
default:
throw new NotSupportedException();
}
elements.Add(new Element(sheetBitmaps[sheetIndex], bitmap, rectangle, appliedTransform));
}
#endregion
#region 생성한 Graphics 객체를 Dispose합니다.
foreach (var item in graphics)
{
if (item != null)
{
item.Dispose();
}
}
#endregion
return(new BitmapSheet(sheetBitmaps, elements));
}