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Update .aseprite file specs with v1.3 updates
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David Capello
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@ -25,7 +25,10 @@ ASE files use Intel (little-endian) byte order.
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* `PIXEL`: One pixel, depending on the image pixel format:
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- **RGBA**: `BYTE[4]`, each pixel have 4 bytes in this order Red, Green, Blue, Alpha.
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- **Grayscale**: `BYTE[2]`, each pixel have 2 bytes in the order Value, Alpha.
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- **Indexed**: `BYTE`, Each pixel uses 1 byte (the index).
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- **Indexed**: `BYTE`, each pixel uses 1 byte (the index).
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* `TILE`: **Tilemaps**: Each tile can be a 8-bit (`BYTE`), 16-bit
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(`WORD`), or 32-bit (`DWORD`) value and there are masks related to
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the meaning of each bit.
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## Introduction
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@ -146,6 +149,7 @@ Ignore this chunk if you find the new palette chunk (0x2019)
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WORD Layer type
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0 = Normal (image) layer
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1 = Group
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2 = Tilemap
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WORD Layer child level (see NOTE.1)
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WORD Default layer width in pixels (ignored)
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WORD Default layer height in pixels (ignored)
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@ -173,19 +177,24 @@ Ignore this chunk if you find the new palette chunk (0x2019)
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Note: valid only if file header flags field has bit 1 set
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BYTE[3] For future (set to zero)
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STRING Layer name
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+ If layer type = 2
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DWORD Tileset index
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### Cel Chunk (0x2005)
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This chunk determine where to put a cel in the specified
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layer/frame.
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This chunk determine where to put a cel in the specified layer/frame.
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WORD Layer index (see NOTE.2)
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SHORT X position
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SHORT Y position
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BYTE Opacity level
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WORD Cel type
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WORD Cel Type
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0 - Raw Image Data (unused, compressed image is preferred)
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1 - Linked Cel
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2 - Compressed Image
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3 - Compressed Tilemap
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BYTE[7] For future (set to zero)
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+ For cel type = 0 (Raw Cel)
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+ For cel type = 0 (Raw Image Data)
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WORD Width in pixels
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WORD Height in pixels
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PIXEL[] Raw pixel data: row by row from top to bottom,
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@ -195,14 +204,18 @@ Ignore this chunk if you find the new palette chunk (0x2019)
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+ For cel type = 2 (Compressed Image)
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WORD Width in pixels
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WORD Height in pixels
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BYTE[] "Raw Cel" data compressed with ZLIB method
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Details about the ZLIB and DEFLATE compression methods:
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* https://www.ietf.org/rfc/rfc1950
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* https://www.ietf.org/rfc/rfc1951
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* Some extra notes that might help you to decode the data:
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http://george.chiramattel.com/blog/2007/09/deflatestream-block-length-does-not-match.html
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BYTE[] "Raw Cel" data compressed with ZLIB method (see NOTE.3)
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+ For cel type = 3 (Compressed Tilemap)
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WORD Width in number of tiles
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WORD Height in number of tiles
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WORD Bits per tile (at the moment it's always 32-bit per tile)
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DWORD Bitmask for tile ID (e.g. 0x1fffffff for 32-bit tiles)
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DWORD Bitmask for X flip
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DWORD Bitmask for Y flip
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DWORD Bitmask for 90CW rotation
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BYTE[10] Reserved
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TILE[] Row by row, from top to bottom tile by tile
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compressed with ZLIB method (see NOTE.3)
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### Cel Extra Chunk (0x2006)
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@ -231,11 +244,23 @@ Color profile for RGB or grayscale values.
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this fixed gamma, because sRGB uses different gamma sections
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(linear and non-linear). If sRGB is specified with a fixed
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gamma = 1.0, it means that this is Linear sRGB.
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BYTE[8] Reserved (set to zero]
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BYTE[8] Reserved (set to zero)
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+ If type = ICC:
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DWORD ICC profile data length
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BYTE[] ICC profile data. More info: http://www.color.org/ICC1V42.pdf
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### External Files Chunk (0x2008)
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A list of external files linked with this file. It might be used to
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reference external palettes or tilesets.
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DWORD Number of entries
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BYTE[8] Reserved (set to zero)
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+ For each entry
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DWORD Entry ID (this ID is referenced by tilesets or palettes)
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BYTE[8] Reserved (set to zero)
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STRING External file name
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### Mask Chunk (0x2016) DEPRECATED
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SHORT X position
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@ -254,6 +279,10 @@ Never used.
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### Tags Chunk (0x2018)
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After the tags chunk, you can write one user data chunk for each tag.
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E.g. if there are 10 tags, you can then write 10 user data chunks one
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for each tag.
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WORD Number of tags
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BYTE[8] For future (set to zero)
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+ For each tag
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@ -265,6 +294,9 @@ Never used.
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2 = Ping-pong
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BYTE[8] For future (set to zero)
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BYTE[3] RGB values of the tag color
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Deprecated, used only for backward compatibility with Aseprite v1.2.x
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The color of the tag is the one in the user data field following
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the tags chunk
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BYTE Extra byte (zero)
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STRING Tag name
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@ -288,7 +320,12 @@ Never used.
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Insert this user data in the last read chunk. E.g. If we've read a
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layer, this user data belongs to that layer, if we've read a cel, it
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belongs to that cel, etc.
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belongs to that cel, etc. There are some special cases: After a Tags
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chunk, there will be several user data fields, one for each tag, you
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should associate the user data in the same order as the tags are in
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the Tags chunk.
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In version 1.3 a sprite has associated user data, to consider this case
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there is an User Data Chunk at the first frame after the Palette Chunk.
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DWORD Flags
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1 = Has text
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@ -326,6 +363,36 @@ belongs to that cel, etc.
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LONG Pivot X position (relative to the slice origin)
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LONG Pivot Y position (relative to the slice origin)
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### Tileset Chunk (0x2023)
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DWORD Tileset ID
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DWORD Tileset flags
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1 - Include link to external file
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2 - Include tiles inside this file
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4 - Tilemaps using this tileset use tile ID=0 as empty tile
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(this is the new format). In rare cases this bit is off,
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and the empty tile will be equal to 0xffffffff (used in
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internal versions of Aseprite)
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DWORD Number of tiles
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WORD Tile Width
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WORD Tile Height
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SHORT Base Index: Number to show in the screen from the tile with
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index 1 and so on (by default this is field is 1, so the data
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that is displayed is equivalent to the data in memory). But it
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can be 0 to display zero-based indexing (this field isn't used
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for the representation of the data in the file, it's just for
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UI purposes).
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BYTE[14] Reserved
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STRING Name of the tileset
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+ If flag 1 is set
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DWORD ID of the external file. This ID is one entry
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of the the External Files Chunk.
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DWORD Tileset ID in the external file
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+ If flag 2 is set
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DWORD Compressed data length
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PIXEL[] Compressed Tileset image (see NOTE.3):
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(Tile Width) x (Tile Height x Number of Tiles)
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### Notes
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#### NOTE.1
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@ -356,6 +423,15 @@ example:
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| `- Layer2 4
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`- Layer3 5
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#### NOTE.3
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Details about the ZLIB and DEFLATE compression methods:
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* https://www.ietf.org/rfc/rfc1950
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* https://www.ietf.org/rfc/rfc1951
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* Some extra notes that might help you to decode the data:
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http://george.chiramattel.com/blog/2007/09/deflatestream-block-length-does-not-match.html
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## File Format Changes
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1. The first change from the first release of the new .ase format,
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