public static UserDataChunk Read(AsepriteStreamReader reader)
{
//DWORD Flags
// 1 = Has text
// 2 = Has color
var flag = reader.DWORD();
//+ If flags have bit 1
// STRING Text
if (reader.FLAG(flag, 1))
{
return(new UserDataChunk(reader.STRING()));
}
//+If flags have bit 2
// BYTE Color Red(0 - 255)
// BYTE Color Green(0 - 255)
// BYTE Color Blue(0 - 255)
// BYTE Color Alpha(0 - 255)
if (reader.FLAG(flag, 2))
{
return(new UserDataChunk(reader.BYTE(), reader.BYTE(), reader.BYTE(), reader.BYTE()));
}
return(new UserDataChunk());
}
public static SliceKey Read(AsepriteStreamReader reader, int flag)
{
// DWORD Frame number(this slice is valid from
// this frame to the end of the animation)
var frameNumber = reader.DWORD();
// LONG Slice X origin coordinate in the sprite
var xOrigin = reader.LONG();
// LONG Slice Y origin coordinate in the sprite
var yOrigin = reader.LONG();
// DWORD Slice width(can be 0 if this slice hidden in the
// animation from the given frame)
var width = reader.DWORD();
// DWORD Slice height
var height = reader.DWORD();
long centerX = 0;
long centerY = 0;
long pivotX = 0;
long pivotY = 0;
uint centerWidth = 0;
uint centerHeight = 0;
// + If flags have bit 1
if (reader.FLAG(flag, 1))
{
// LONG Center X position(relative to slice bounds)
centerX = reader.LONG();
// LONG Center Y position
centerY = reader.LONG();
// DWORD Center width
centerWidth = reader.DWORD();
// DWORD Center height
centerHeight = reader.DWORD();
}
// + If flags have bit 2
if (reader.FLAG(flag, 2))
{
// LONG Pivot X position(relative to the slice origin)
pivotX = reader.LONG();
// LONG Pivot Y position(relative to the slice origin)
pivotY = reader.LONG();
}
return(new SliceKey(frameNumber, xOrigin, yOrigin, width, height, centerX, centerY, centerWidth, centerHeight, pivotX, pivotY));
}
public static PaletteEntry Read(AsepriteStreamReader reader, string defaultName)
{
// WORD Entry flags:
// 1 = Has name
bool hasName = reader.FLAG(reader.WORD(), 1);
// BYTE Red(0 - 255)
var r = reader.BYTE();
// BYTE Green(0 - 255)
var g = reader.BYTE();
// BYTE Blue(0 - 255)
var b = reader.BYTE();
// BYTE Alpha(0 - 255)
var a = reader.BYTE();
// +If has name bit in entry flags
// STRING Color name
var name = hasName
? reader.STRING()
: defaultName;
return(new PaletteEntry(r, g, b, a, name));
}
public static Header Read(AsepriteStreamReader reader)
{
// DWORD File size
var fileSize = reader.DWORD();
// WORD Magic number (0xA5E0)
var magicNumber = reader.WORD();
if (magicNumber != 0xA5E0)
{
throw new System.Exception("Invalid Format");
}
// WORD Frames
var frames = reader.WORD();
// WORD Width in pixels
var width = reader.WORD();
// WORD Height in pixels
var height = reader.WORD();
// WORD Color depth (bits per pixel)
// 32 bpp = RGBA
// 16 bpp = Grayscale
// 8 bpp = Indexed
var colorDepth = (ColorDepth)reader.WORD();
// DWORD Flags:
// 1 = Layer opacity has valid value
var layerOpacityHasValidValue = reader.FLAG(reader.DWORD(), 1);
// WORD Speed (milliseconds between frame, like in FLC files)
// DEPRECATED: You should use the frame duration field
// from each frame header
reader.WORD();
// DWORD Set be 0
reader.DWORD();
// DWORD Set be 0
reader.DWORD();
// BYTE Palette entry (index) which represent transparent color
// in all non-background layers (only for Indexed sprites).
var transparentIndex = reader.BYTE();
// BYTE[3] Ignore these bytes
reader.BYTES(3);
// WORD Number of colors (0 means 256 for old sprites)
reader.WORD();
// BYTE Pixel width (pixel ratio is "pixel width/pixel height").
// If this or pixel height field is zero, pixel ratio is 1:1
var pixelWidth = reader.BYTE();
// BYTE Pixel height
var pixelHeight = reader.BYTE();
byte pixelRatio = 1;
if (pixelHeight > 0 && pixelWidth > 0)
{
pixelRatio = (byte)(pixelWidth / pixelHeight);
}
// SHORT X position of the grid
var xPos = reader.SHORT();
// SHORT Y position of the grid
var yPos = reader.SHORT();
// WORD Grid width (zero if there is no grid, grid size
// is 16x16 on Aseprite by default)
var gridWidth = reader.WORD();
// WORD Grid height (zero if there is no grid)
var gridHeight = reader.WORD();
// BYTE[84] For future (set to zero)
reader.BYTES(84);
return(new Header(
fileSize,
frames,
width,
height,
colorDepth,
layerOpacityHasValidValue,
transparentIndex,
pixelWidth,
pixelHeight,
pixelRatio,
xPos,
yPos,
gridWidth,
gridHeight));
}
