/
DatabaseLoaderTexture_DDS.cs
234 lines (201 loc) · 10.1 KB
/
DatabaseLoaderTexture_DDS.cs
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using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;
namespace DDSLoader
{
[DatabaseLoaderAttrib(new[] { "dds" })]
public class DatabaseLoaderTexture_DDS : DatabaseLoader<GameDatabase.TextureInfo>
{
private const uint DDSD_MIPMAPCOUNT_BIT = 0x00020000;
private const uint DDPF_ALPHAPIXELS = 0x00000001;
private const uint DDPF_ALPHA = 0x00000002;
private const uint DDPF_FOURCC = 0x00000004;
private const uint DDPF_RGB = 0x00000040;
private const uint DDPF_YUV = 0x00000200;
private const uint DDPF_LUMINANCE = 0x00020000;
private const uint DDPF_NORMAL = 0x80000000;
private static string error;
public override IEnumerator Load(UrlDir.UrlFile urlFile, FileInfo file)
{
bool asNormal = urlFile.name.EndsWith("NRM") || Settings.isNormal(urlFile.url);
bool keepReadable = urlFile.name.EndsWith("READ") || Settings.keepReadable(urlFile.url);
obj = LoadDDS(urlFile.fullPath, keepReadable, asNormal);
successful = obj != null;
if (!successful)
Debug.LogWarning("DDSLoader Texture load error with '" + urlFile.url + "': " + error);
yield return null;
}
// DDS Texture loader inspired by
// http://answers.unity3d.com/questions/555984/can-you-load-dds-textures-during-runtime.html#answer-707772
// http://msdn.microsoft.com/en-us/library/bb943992.aspx
// http://msdn.microsoft.com/en-us/library/windows/desktop/bb205578(v=vs.85).aspx
// mipmapBias limits the number of mipmap when > 0
public static GameDatabase.TextureInfo LoadDDS(string path, bool keepReadable = false, bool asNormal = false, int mipmapBias = -1, bool apply = true)
{
if (!File.Exists(path))
{
error = "File does not exist";
return null;
}
using (BinaryReader reader = new BinaryReader(File.Open(path, FileMode.Open, FileAccess.Read)))
{
byte[] dwMagic = reader.ReadBytes(4);
if (!fourCCEquals(dwMagic, "DDS "))
{
error = "Invalid DDS file";
return null;
}
int dwSize = (int)reader.ReadUInt32();
//this header byte should be 124 for DDS image files
if (dwSize != 124)
{
error = "Invalid header size";
return null;
}
int dwFlags = (int)reader.ReadUInt32();
int dwHeight = (int)reader.ReadUInt32();
int dwWidth = (int)reader.ReadUInt32();
int dwPitchOrLinearSize = (int)reader.ReadUInt32();
int dwDepth = (int)reader.ReadUInt32();
int dwMipMapCount = (int)reader.ReadUInt32();
if ((dwFlags & DDSD_MIPMAPCOUNT_BIT) == 0)
{
dwMipMapCount = 1;
}
// dwReserved1
for (int i = 0; i < 11; i++)
{
reader.ReadUInt32();
}
// DDS_PIXELFORMAT
uint dds_pxlf_dwSize = reader.ReadUInt32();
uint dds_pxlf_dwFlags = reader.ReadUInt32();
byte[] dds_pxlf_dwFourCC = reader.ReadBytes(4);
string fourCC = Encoding.ASCII.GetString(dds_pxlf_dwFourCC);
uint dds_pxlf_dwRGBBitCount = reader.ReadUInt32();
uint pixelSize = dds_pxlf_dwRGBBitCount / 8;
uint dds_pxlf_dwRBitMask = reader.ReadUInt32();
uint dds_pxlf_dwGBitMask = reader.ReadUInt32();
uint dds_pxlf_dwBBitMask = reader.ReadUInt32();
uint dds_pxlf_dwABitMask = reader.ReadUInt32();
int dwCaps = (int)reader.ReadUInt32();
int dwCaps2 = (int)reader.ReadUInt32();
int dwCaps3 = (int)reader.ReadUInt32();
int dwCaps4 = (int)reader.ReadUInt32();
int dwReserved2 = (int)reader.ReadUInt32();
TextureFormat textureFormat = TextureFormat.ARGB32;
bool isCompressed = false;
bool isNormalMap = (dds_pxlf_dwFlags & DDPF_NORMAL) != 0 || asNormal;
bool alpha = (dds_pxlf_dwFlags & DDPF_ALPHA) != 0;
bool fourcc = (dds_pxlf_dwFlags & DDPF_FOURCC) != 0;
bool rgb = (dds_pxlf_dwFlags & DDPF_RGB) != 0;
bool alphapixel = (dds_pxlf_dwFlags & DDPF_ALPHAPIXELS) != 0;
bool luminance = (dds_pxlf_dwFlags & DDPF_LUMINANCE) != 0;
bool rgb888 = dds_pxlf_dwRBitMask == 0x000000ff && dds_pxlf_dwGBitMask == 0x0000ff00 && dds_pxlf_dwBBitMask == 0x00ff0000;
bool bgr888 = dds_pxlf_dwRBitMask == 0x00ff0000 && dds_pxlf_dwGBitMask == 0x0000ff00 && dds_pxlf_dwBBitMask == 0x000000ff;
bool rgb565 = dds_pxlf_dwRBitMask == 0x0000F800 && dds_pxlf_dwGBitMask == 0x000007E0 && dds_pxlf_dwBBitMask == 0x0000001F;
bool argb4444 = dds_pxlf_dwABitMask == 0x0000f000 && dds_pxlf_dwRBitMask == 0x00000f00 && dds_pxlf_dwGBitMask == 0x000000f0 && dds_pxlf_dwBBitMask == 0x0000000f;
bool rbga4444 = dds_pxlf_dwABitMask == 0x0000000f && dds_pxlf_dwRBitMask == 0x0000f000 && dds_pxlf_dwGBitMask == 0x000000f0 && dds_pxlf_dwBBitMask == 0x00000f00;
if (fourcc)
{
// Texture dos not contain RGB data, check FourCC for format
isCompressed = true;
if (fourCCEquals(dds_pxlf_dwFourCC, "DXT1"))
{
textureFormat = TextureFormat.DXT1;
}
else if (fourCCEquals(dds_pxlf_dwFourCC, "DXT5"))
{
textureFormat = TextureFormat.DXT5;
}
}
else if (rgb && (rgb888 || bgr888))
{
// RGB or RGBA format
textureFormat = alphapixel
? TextureFormat.RGBA32
: TextureFormat.RGB24;
}
else if (rgb && rgb565)
{
// Nvidia texconv B5G6R5_UNORM
textureFormat = TextureFormat.RGB565;
}
else if (rgb && alphapixel && argb4444)
{
// Nvidia texconv B4G4R4A4_UNORM
textureFormat = TextureFormat.ARGB4444;
}
else if (rgb && alphapixel && rbga4444)
{
textureFormat = TextureFormat.RGBA4444;
}
else if (!rgb && alpha != luminance)
{
// A8 format or Luminance 8
textureFormat = TextureFormat.Alpha8;
}
else
{
error = "Only DXT1, DXT5, A8, RGB24, BGR24, RGBA32, BGBR32, RGB565, ARGB4444 and RGBA4444 are supported";
return null;
}
long dataBias = 128;
if (Settings.MipmapBias != 0 || Settings.NormalMipmapBias != 0)
{
int bias = isNormalMap ? Settings.NormalMipmapBias : Settings.MipmapBias;
if (mipmapBias > 0)
bias = mipmapBias;
int blockSize = textureFormat == TextureFormat.DXT1 ? 8 : 16;
int levels = Math.Min(bias, dwMipMapCount - 1);
for (int i = 0; i < levels; ++i)
{
dataBias += isCompressed
? ((dwWidth + 3) / 4) * ((dwHeight + 3) / 4) * blockSize
: dwWidth * dwHeight * pixelSize;
dwWidth = Math.Max(1, dwWidth / 2);
dwHeight = Math.Max(1, dwHeight / 2);
}
}
long dxtBytesLength = reader.BaseStream.Length - dataBias;
reader.BaseStream.Seek(dataBias, SeekOrigin.Begin);
byte[] dxtBytes = reader.ReadBytes((int)dxtBytesLength);
// Swap red and blue.
if (!isCompressed && bgr888)
{
for (uint i = 0; i < dxtBytes.Length; i += pixelSize)
{
byte b = dxtBytes[i + 0];
byte r = dxtBytes[i + 2];
dxtBytes[i + 0] = r;
dxtBytes[i + 2] = b;
}
}
//QualitySettings.masterTextureLimit = 0;
// Work around for an >Unity< Bug.
// if QualitySettings.masterTextureLimit != 0 (half or quarter texture rez)
// and dwWidth and dwHeight divided by 2 (or 4 for quarter rez) are not a multiple of 4
// and we are creating a DXT5 or DXT1 texture
// Then you get an Unity error on the "new Texture"
int quality = QualitySettings.masterTextureLimit;
// If the bug conditions are present then switch to full quality
if (isCompressed && quality > 0 && (dwWidth >> quality) % 4 != 0 && (dwHeight >> quality) % 4 != 0)
QualitySettings.masterTextureLimit = 0;
Texture2D texture = new Texture2D(dwWidth, dwHeight, textureFormat, dwMipMapCount > 1);
texture.LoadRawTextureData(dxtBytes);
if (apply)
texture.Apply(false, !keepReadable);
if (QualitySettings.masterTextureLimit != quality)
QualitySettings.masterTextureLimit = quality;
return new GameDatabase.TextureInfo(texture, isNormalMap, keepReadable, isCompressed);
}
}
private static bool fourCCEquals(IList<byte> bytes, string s)
{
return bytes[0] == s[0] && bytes[1] == s[1] && bytes[2] == s[2] && bytes[3] == s[3];
}
}
}