public static CellChunk Read(AsepriteStreamReader reader, ColorDepth colorDepth)
{
// WORD Layer index(see NOTE.2)
var layerIndex = reader.WORD();
// SHORT X position
var xPosition = reader.SHORT();
// SHORT Y position
var yPosition = reader.SHORT();
// BYTE Opacity level
var opacityLevel = reader.BYTE();
// WORD Cel type
var cellType = reader.WORD();
// BYTE[7] For future(set to zero)
reader.BYTES(7);
// +For cel type = 0(Raw Cel)
if (cellType == 0)
{
// WORD Width in pixels
var width = reader.WORD();
// WORD Height in pixels
var height = reader.WORD();
// PIXEL[] Raw pixel data: row by row from top to bottom,
// for each scanline read pixels from left to right.
var depthModifier = 0;
if (colorDepth == ColorDepth.RGBA)
{
depthModifier = 4;
}
else if (colorDepth == ColorDepth.Grayscale)
{
depthModifier = 2;
}
else if (colorDepth == ColorDepth.Indexed)
{
depthModifier = 1;
}
var pixels = reader.BYTES(width * height * depthModifier);
return(new CellChunk(layerIndex, xPosition, yPosition, opacityLevel, cellType,
width, height, pixels));
}
// + For cel type = 1(Linked Cel)
else if (cellType == 1)
{
// WORD Frame position to link with
var linkedFramePosition = reader.WORD();
return(new CellChunk(layerIndex, xPosition, yPosition, opacityLevel, cellType,
linkedFramePosition));
}
// + For cel type = 2(Compressed Image)
else if (cellType == 2)
{
// WORD Width in pixels
var width = reader.WORD();
// WORD Height in pixels
var height = reader.WORD();
// BYTE[] "Raw Cel" data compressed with ZLIB method
var depthModifier = 0;
if (colorDepth == ColorDepth.RGBA)
{
depthModifier = 4;
}
else if (colorDepth == ColorDepth.Grayscale)
{
depthModifier = 2;
}
else if (colorDepth == ColorDepth.Indexed)
{
depthModifier = 1;
}
var count = width * height * depthModifier;
var pixels = new byte[count];
reader.DEFLATE(pixels);
return(new CellChunk(layerIndex, xPosition, yPosition, opacityLevel, cellType, width, height, pixels));
}
else
{
return(new CellChunk(layerIndex, xPosition, yPosition, opacityLevel, cellType));
}
}
