public static Rect[] Combine(Texture2D texture, Texture2D[] textures, int width, int height, bool forceSquare, int padding, int maxSize)
{
PackingResult result = new PackingResult();
if (!TexCombine.Packing(ref result, textures, width, height, forceSquare, padding, maxSize))
{
return(null);
}
width = result.width;
height = result.height;
texture.Resize(width, height);
texture.SetPixels(new Color[width * height]);
// The returned rects
Rect[] rects = new Rect[textures.Length];
for (int i = 0; i < textures.Length; i++)
{
Texture2D tex = textures[i];
if (tex == null)
{
continue;
}
Rect rect = result.data[i].rect;
int xPadding = (result.data[i].paddingX ? padding : 0);
int yPadding = (result.data[i].paddingY ? padding : 0);
Color[] colors = tex.GetPixels();
// Would be used to rotate the texture if need be.
if (rect.width != tex.width + xPadding)
{
Color[] newColors = tex.GetPixels();
for (int x = 0; x < rect.width; x++)
{
for (int y = 0; y < rect.height; y++)
{
int prevIndex = ((int)rect.height - (y + 1)) + x * (int)tex.width;
newColors[x + y * (int)rect.width] = colors[prevIndex];
}
}
colors = newColors;
}
texture.SetPixels((int)rect.x, (int)rect.y, (int)rect.width - xPadding, (int)rect.height - yPadding, colors);
rect.x /= width;
rect.y /= height;
rect.width = (rect.width - xPadding) / width;
rect.height = (rect.height - yPadding) / height;
rects[i] = rect;
}
texture.Apply();
return(rects);
}
private static bool Packing(ref PackingResult result, Texture2D[] textures, int width, int height, bool forceSquare, int padding, int maxSize)
{
if (width > maxSize && height > maxSize)
{
return(false);
}
if (width > maxSize || height > maxSize)
{
int temp = width;
width = height;
height = temp;
}
if (forceSquare)
{
if (width > height)
{
height = width;
}
else if (height > width)
{
width = height;
}
}
if (result.packing == null)
{
result.packing = new RectangularPacking(width, height, false);
}
else
{
result.packing.Reset(width, height, false);
}
result.width = width;
result.height = height;
if (result.data == null)
{
result.data = new PackingData[textures.Length];
}
for (int i = 0; i < textures.Length; i++)
{
Texture2D tex = textures[i];
if (tex == null)
{
continue;
}
Rect rect = default(Rect);
int xPadding = 1;
int yPadding = 1;
for (xPadding = 1; xPadding >= 0; --xPadding)
{
for (yPadding = 1; yPadding >= 0; --yPadding)
{
rect = result.packing.Insert(tex.width + (xPadding * padding), tex.height + (yPadding * padding), RectangularPacking.Heuristic.BestAreaFit);
if (rect.width != 0 && rect.height != 0)
{
break;
}
// After having no padding if it still doesn't fit -- increase texture size.
else if (xPadding == 0 && yPadding == 0)
{
return(TexCombine.Packing(ref result, textures,
width * (width <= height ? 2 : 1),
height * (height < width ? 2 : 1),
forceSquare, padding, maxSize));
}
}
if (rect.width != 0 && rect.height != 0)
{
break;
}
}
result.data[i].rect = rect;
result.data[i].paddingX = (xPadding != 0);
result.data[i].paddingY = (yPadding != 0);
}
return(true);
}
