/// <summary>
/// Sets the appropriate raster info values based on the width, height and pixel format of the texture.
/// </summary>
/// <param name="width">Width of the texture.</param>
/// <param name="height">Height of the texture.</param>
/// <param name="pixelFormat">PS2 pixel format of the given texture data.</param>
private void CreateRasterInfo(int width, int height, PS2PixelFormat pixelFormat)
{
_width = width;
_height = height;
_depth = PS2PixelFormatHelper.GetPixelFormatDepth(pixelFormat);
_rasterFormat = GetRasterFormatFromDepth(_depth);
_tex0 = new Tex0Register(pixelFormat, width, height);
_tex1 = new Tex1Register(); // default settings
int texSize = width * height;
if (texSize < 16384) // because yes
{
_tex1.MaxMipLevel = 7;
_tex1.MipMinFilter = PS2FilterMode.None;
if (texSize <= 4096)
{
_tex1.MipMaxFilter = PS2FilterMode.None;
}
else
{
_tex1.MipMaxFilter = PS2FilterMode.Nearest;
}
}
_mip1 = new MipTBPRegister(); // default settings
_mip2 = new MipTBPRegister(); // default settings
_texelDataLength = (uint)PS2PixelFormatHelper.GetTexelDataSize(pixelFormat, width, height);
// Add image header size to the length if there is one
if (_rasterFormat.HasFlagUnchecked(RWRasterFormats.HasHeaders))
_texelDataLength += PS2StandardImageHeader.Size;
_paletteDataLength = 0; // set to 0 if there's no palette present
// division by 2 might only apply for 8 bit..
int transferWidth = width / 2;
int transferHeight = height / 2;
_gpuAlignedLength = (uint)(transferWidth * transferHeight);
// Calculate the palette data length for indexed textures
if (_depth == 4 || _depth == 8)
{
int numColors = 256;
if (_depth == 4)
{
numColors = 16;
}
_paletteDataLength = (uint)(numColors * 4);
// division by 4 might only apply for 8 bit..
_gpuAlignedLength += _paletteDataLength / 4;
// Add image header size to the length if there is one
if (_rasterFormat.HasFlagUnchecked(RWRasterFormats.HasHeaders))
_paletteDataLength += PS2StandardImageHeader.Size;
}
// align to pages of 2048
_gpuAlignedLength = (uint)AlignmentHelper.Align(_gpuAlignedLength, 2048);
}
/// <summary>
/// Initializer only to be called in <see cref="RWNodeFactory"/>.
/// </summary>
internal RWRasterInfo(RWNodeFactory.RWNodeInfo header, BinaryReader reader)
: base(header)
{
_width = reader.ReadInt32();
_height = reader.ReadInt32();
_depth = reader.ReadInt32();
_rasterFormat = (RWRasterFormats)reader.ReadUInt32();
_tex0 = new Tex0Register(reader);
_tex1 = new Tex1Register(reader);
_mip1 = new MipTBPRegister(reader);
_mip2 = new MipTBPRegister(reader);
_texelDataLength = reader.ReadUInt32();
_paletteDataLength = reader.ReadUInt32();
_gpuAlignedLength = reader.ReadUInt32();
uint skyMipMapValue = reader.ReadUInt32();
}