/// <summary>
/// Pack all of the specified sprites into a single texture, updating the outer and inner rects of the sprites as needed.
/// </summary>
static bool PackTextures(Texture2D tex, List <SpriteEntry> sprites)
{
Texture2D[] textures = new Texture2D[sprites.Count];
Rect[] rects;
#if UNITY_3_5 || UNITY_4_0
int maxSize = 4096;
#else
int maxSize = SystemInfo.maxTextureSize;
#endif
#if UNITY_ANDROID || UNITY_IPHONE
maxSize = Mathf.Min(maxSize, NGUISettings.allow4096 ? 4096 : 2048);
#endif
if (NGUISettings.unityPacking)
{
for (int i = 0; i < sprites.Count; ++i)
{
textures[i] = sprites[i].tex;
}
rects = tex.PackTextures(textures, NGUISettings.atlasPadding, maxSize);
}
else
{
sprites.Sort(Compare);
for (int i = 0; i < sprites.Count; ++i)
{
textures[i] = sprites[i].tex;
}
rects = UITexturePackerNGUI.PackTextures(tex, textures, 4, 4, NGUISettings.atlasPadding, maxSize);
}
for (int i = 0; i < sprites.Count; ++i)
{
Rect rect = NGUIMath.ConvertToPixels(rects[i], tex.width, tex.height, true);
// Apparently Unity can take the liberty of destroying temporary textures without any warning
if (textures[i] == null)
{
return(false);
}
// Make sure that we don't shrink the textures
if (Mathf.RoundToInt(rect.width) != textures[i].width)
{
return(false);
}
SpriteEntry se = sprites[i];
se.x = Mathf.RoundToInt(rect.x);
se.y = Mathf.RoundToInt(rect.y);
se.width = Mathf.RoundToInt(rect.width);
se.height = Mathf.RoundToInt(rect.height);
}
return(true);
}
public static Rect[] PackTextures (Texture2D texture, Texture2D[] textures, int width, int height, int padding, int maxSize)
{
if (width > maxSize && height > maxSize) return null;
if (width > maxSize || height > maxSize) { int temp = width; width = height; height = temp; }
// Force square by sizing up
if (NGUISettings.forceSquareAtlas)
{
if (width > height)
height = width;
else if (height > width)
width = height;
}
UITexturePackerNGUI bp = new UITexturePackerNGUI(width, height, false);
Storage[] storage = new Storage[textures.Length];
for (int i = 0; i < textures.Length; i++)
{
Texture2D tex = textures[i];
if (!tex) continue;
Rect rect = new Rect();
int xPadding = 1;
int yPadding = 1;
for (xPadding = 1; xPadding >= 0; --xPadding)
{
for (yPadding = 1; yPadding >= 0; --yPadding)
{
rect = bp.Insert(tex.width + (xPadding * padding), tex.height + (yPadding * padding),
UITexturePackerNGUI.FreeRectChoiceHeuristic.RectBestAreaFit);
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 PackTextures(texture, textures, width * (width <= height ? 2 : 1),
height * (height < width ? 2 : 1), padding, maxSize);
}
}
if (rect.width != 0 && rect.height != 0) break;
}
storage[i] = new Storage();
storage[i].rect = rect;
storage[i].paddingX = (xPadding != 0);
storage[i].paddingY = (yPadding != 0);
}
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) continue;
Rect rect = storage[i].rect;
int xPadding = (storage[i].paddingX ? padding : 0);
int yPadding = (storage[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;
}
public static Rect[] PackTextures(Texture2D texture, Texture2D[] textures, int width, int height, int padding, int maxSize)
{
if (width > maxSize && height > maxSize)
{
return(null);
}
if (width > maxSize || height > maxSize)
{
int temp = width; width = height; height = temp;
}
// Force square by sizing up
if (NGUISettings.forceSquareAtlas)
{
if (width > height)
{
height = width;
}
else if (height > width)
{
width = height;
}
}
UITexturePackerNGUI bp = new UITexturePackerNGUI(width, height, false);
Storage[] storage = new Storage[textures.Length];
for (int i = 0; i < textures.Length; i++)
{
Texture2D tex = textures[i];
if (!tex)
{
continue;
}
Rect rect = new Rect();
int xPadding = 1;
int yPadding = 1;
for (xPadding = 1; xPadding >= 0; --xPadding)
{
for (yPadding = 1; yPadding >= 0; --yPadding)
{
rect = bp.Insert(tex.width + (xPadding * padding), tex.height + (yPadding * padding),
UITexturePackerNGUI.FreeRectChoiceHeuristic.RectBestAreaFit);
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(PackTextures(texture, textures, width * (width <= height ? 2 : 1),
height * (height < width ? 2 : 1), padding, maxSize));
}
}
if (rect.width != 0 && rect.height != 0)
{
break;
}
}
storage[i] = new Storage();
storage[i].rect = rect;
storage[i].paddingX = (xPadding != 0);
storage[i].paddingY = (yPadding != 0);
}
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)
{
continue;
}
Rect rect = storage[i].rect;
int xPadding = (storage[i].paddingX ? padding : 0);
int yPadding = (storage[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);
}
