Anzeigen von DDS Dateien

[TiGü]

Da wirst du um das Laden per Stream und dann händisch auseinander basteln wohl nicht drum rum kommen.
Außer natürlich, jemand hat noch irgendwo eine fertige Unit parat.

Bist du mit dem Programm ILSpy und Paint.Net vertraut?
Mit dem Ersten kannst du im Zweiten nachschauen, wie im Namespace PaintDotNet.Data.Dds -> DdsFile diese Texturen geladen werden.

Beispiel:

Code:

      public void Load(Stream input)
      {
         uint ddsTag = (uint)input.ReadUInt32();
         if (ddsTag != 542327876u)
         {
            throw new FormatException("File does not appear to be a DDS image");
         }
         this.m_header.Read(input);
         if (this.m_header.m_pixelFormat.m_flags == 0u || (this.m_header.m_pixelFormat.m_flags & 4u) != 0u)
         {
            uint fourCC = this.m_header.m_pixelFormat.m_fourCC;
            int squishFlags;
            if (fourCC != 827611204u)
            {
               if (fourCC != 861165636u)
               {
                  if (fourCC != 894720068u)
                  {
                     throw new FormatException("File is not a supported DDS format");
                  }
                  squishFlags = 4;
               }
               else
               {
                  squishFlags = 2;
               }
            }
            else
            {
               squishFlags = 1;
            }
            int blockCount = (this.GetWidth() + 3) / 4 * ((this.GetHeight() + 3) / 4);
            int blockSize = ((squishFlags & 1) != 0) ? 8 : 16;
            byte[] compressedBlocks = new byte[blockCount * blockSize];
            input.Read(compressedBlocks, 0, compressedBlocks.GetLength(0));
            this.m_pixelData = DdsSquish.DecompressImage(compressedBlocks, this.GetWidth(), this.GetHeight(), squishFlags);
            return;
         }
         DdsFileFormat fileFormat;
         if (this.m_header.m_pixelFormat.m_flags == 65u && this.m_header.m_pixelFormat.m_rgbBitCount == 32u && this.m_header.m_pixelFormat.m_rBitMask == 16711680u && this.m_header.m_pixelFormat.m_gBitMask == 65280u && this.m_header.m_pixelFormat.m_bBitMask == 255u && this.m_header.m_pixelFormat.m_aBitMask == 4278190080u)
         {
            fileFormat = DdsFileFormat.DDS_FORMAT_A8R8G8B8;
         }
         else if (this.m_header.m_pixelFormat.m_flags == 64u && this.m_header.m_pixelFormat.m_rgbBitCount == 32u && this.m_header.m_pixelFormat.m_rBitMask == 16711680u && this.m_header.m_pixelFormat.m_gBitMask == 65280u && this.m_header.m_pixelFormat.m_bBitMask == 255u && this.m_header.m_pixelFormat.m_aBitMask == 0u)
         {
            fileFormat = DdsFileFormat.DDS_FORMAT_X8R8G8B8;
         }
         else if (this.m_header.m_pixelFormat.m_flags == 65u && this.m_header.m_pixelFormat.m_rgbBitCount == 32u && this.m_header.m_pixelFormat.m_rBitMask == 255u && this.m_header.m_pixelFormat.m_gBitMask == 65280u && this.m_header.m_pixelFormat.m_bBitMask == 16711680u && this.m_header.m_pixelFormat.m_aBitMask == 4278190080u)
         {
            fileFormat = DdsFileFormat.DDS_FORMAT_A8B8G8R8;
         }
         else if (this.m_header.m_pixelFormat.m_flags == 64u && this.m_header.m_pixelFormat.m_rgbBitCount == 32u && this.m_header.m_pixelFormat.m_rBitMask == 255u && this.m_header.m_pixelFormat.m_gBitMask == 65280u && this.m_header.m_pixelFormat.m_bBitMask == 16711680u && this.m_header.m_pixelFormat.m_aBitMask == 0u)
         {
            fileFormat = DdsFileFormat.DDS_FORMAT_X8B8G8R8;
         }
         else if (this.m_header.m_pixelFormat.m_flags == 65u && this.m_header.m_pixelFormat.m_rgbBitCount == 16u && this.m_header.m_pixelFormat.m_rBitMask == 31744u && this.m_header.m_pixelFormat.m_gBitMask == 992u && this.m_header.m_pixelFormat.m_bBitMask == 31u && this.m_header.m_pixelFormat.m_aBitMask == 32768u)
         {
            fileFormat = DdsFileFormat.DDS_FORMAT_A1R5G5B5;
         }
         else if (this.m_header.m_pixelFormat.m_flags == 65u && this.m_header.m_pixelFormat.m_rgbBitCount == 16u && this.m_header.m_pixelFormat.m_rBitMask == 3840u && this.m_header.m_pixelFormat.m_gBitMask == 240u && this.m_header.m_pixelFormat.m_bBitMask == 15u && this.m_header.m_pixelFormat.m_aBitMask == 61440u)
         {
            fileFormat = DdsFileFormat.DDS_FORMAT_A4R4G4B4;
         }
         else if (this.m_header.m_pixelFormat.m_flags == 64u && this.m_header.m_pixelFormat.m_rgbBitCount == 24u && this.m_header.m_pixelFormat.m_rBitMask == 16711680u && this.m_header.m_pixelFormat.m_gBitMask == 65280u && this.m_header.m_pixelFormat.m_bBitMask == 255u && this.m_header.m_pixelFormat.m_aBitMask == 0u)
         {
            fileFormat = DdsFileFormat.DDS_FORMAT_R8G8B8;
         }
         else
         {
            if (this.m_header.m_pixelFormat.m_flags != 64u || this.m_header.m_pixelFormat.m_rgbBitCount != 16u || this.m_header.m_pixelFormat.m_rBitMask != 63488u || this.m_header.m_pixelFormat.m_gBitMask != 2016u || this.m_header.m_pixelFormat.m_bBitMask != 31u || this.m_header.m_pixelFormat.m_aBitMask != 0u)
            {
               throw new FormatException("File is not a supported DDS format");
            }
            fileFormat = DdsFileFormat.DDS_FORMAT_R5G6B5;
         }
         int srcPixelSize = (int)(this.m_header.m_pixelFormat.m_rgbBitCount / 8u);
         int rowPitch;
         if ((this.m_header.m_headerFlags & 8u) != 0u)
         {
            rowPitch = (int)this.m_header.m_pitchOrLinearSize;
         }
         else if ((this.m_header.m_headerFlags & 524288u) != 0u)
         {
            rowPitch = (int)(this.m_header.m_pitchOrLinearSize / this.m_header.m_height);
         }
         else
         {
            rowPitch = (int)(this.m_header.m_width * (uint)srcPixelSize);
         }
         byte[] readPixelData = new byte[(long)rowPitch * (long)((ulong)this.m_header.m_height)];
         input.Read(readPixelData, 0, readPixelData.GetLength(0));
         this.m_pixelData = new byte[this.m_header.m_width * this.m_header.m_height * 4u];
         for (int destY = 0; destY < (int)this.m_header.m_height; destY++)
         {
            for (int destX = 0; destX < (int)this.m_header.m_width; destX++)
            {
               int srcPixelOffset = destY * rowPitch + destX * srcPixelSize;
               uint pixelColour = 0u;
               uint pixelRed = 0u;
               uint pixelGreen = 0u;
               uint pixelBlue = 0u;
               uint pixelAlpha = 0u;
               for (int loop = 0; loop < srcPixelSize; loop++)
               {
                  pixelColour |= (uint)((uint)readPixelData[srcPixelOffset + loop] << 8 * loop);
               }
               if (fileFormat == DdsFileFormat.DDS_FORMAT_A8R8G8B8)
               {
                  pixelAlpha = (pixelColour >> 24 & 255u);
                  pixelRed = (pixelColour >> 16 & 255u);
                  pixelGreen = (pixelColour >> 8 & 255u);
                  pixelBlue = (pixelColour & 255u);
               }
               else if (fileFormat == DdsFileFormat.DDS_FORMAT_X8R8G8B8)
               {
                  pixelAlpha = 255u;
                  pixelRed = (pixelColour >> 16 & 255u);
                  pixelGreen = (pixelColour >> 8 & 255u);
                  pixelBlue = (pixelColour & 255u);
               }
               else if (fileFormat == DdsFileFormat.DDS_FORMAT_A8B8G8R8)
               {
                  pixelAlpha = (pixelColour >> 24 & 255u);
                  pixelRed = (pixelColour & 255u);
                  pixelGreen = (pixelColour >> 8 & 255u);
                  pixelBlue = (pixelColour >> 16 & 255u);
               }
               else if (fileFormat == DdsFileFormat.DDS_FORMAT_X8B8G8R8)
               {
                  pixelAlpha = 255u;
                  pixelRed = (pixelColour & 255u);
                  pixelGreen = (pixelColour >> 8 & 255u);
                  pixelBlue = (pixelColour >> 16 & 255u);
               }
               else if (fileFormat == DdsFileFormat.DDS_FORMAT_A1R5G5B5)
               {
                  pixelAlpha = (pixelColour >> 15) * 255u;
                  pixelRed = (pixelColour >> 10 & 31u);
                  pixelGreen = (pixelColour >> 5 & 31u);
                  pixelBlue = (pixelColour & 31u);
                  pixelRed = (pixelRed << 3 | pixelRed >> 2);
                  pixelGreen = (pixelGreen << 3 | pixelGreen >> 2);
                  pixelBlue = (pixelBlue << 3 | pixelBlue >> 2);
               }
               else if (fileFormat == DdsFileFormat.DDS_FORMAT_A4R4G4B4)
               {
                  pixelAlpha = (pixelColour >> 12 & 255u);
                  pixelRed = (pixelColour >> 8 & 15u);
                  pixelGreen = (pixelColour >> 4 & 15u);
                  pixelBlue = (pixelColour & 15u);
                  pixelAlpha = (pixelAlpha << 4 | pixelAlpha);
                  pixelRed = (pixelRed << 4 | pixelRed);
                  pixelGreen = (pixelGreen << 4 | pixelGreen);
                  pixelBlue = (pixelBlue << 4 | pixelBlue);
               }
               else if (fileFormat == DdsFileFormat.DDS_FORMAT_R8G8B8)
               {
                  pixelAlpha = 255u;
                  pixelRed = (pixelColour >> 16 & 255u);
                  pixelGreen = (pixelColour >> 8 & 255u);
                  pixelBlue = (pixelColour & 255u);
               }
               else if (fileFormat == DdsFileFormat.DDS_FORMAT_R5G6B5)
               {
                  pixelAlpha = 255u;
                  pixelRed = (pixelColour >> 11 & 31u);
                  pixelGreen = (pixelColour >> 5 & 63u);
                  pixelBlue = (pixelColour & 31u);
                  pixelRed = (pixelRed << 3 | pixelRed >> 2);
                  pixelGreen = (pixelGreen << 2 | pixelGreen >> 4);
                  pixelBlue = (pixelBlue << 3 | pixelBlue >> 2);
               }
               int destPixelOffset = destY * (int)this.m_header.m_width * 4 + destX * 4;
               this.m_pixelData[destPixelOffset] = (byte)pixelRed;
               this.m_pixelData[destPixelOffset + 1] = (byte)pixelGreen;
               this.m_pixelData[destPixelOffset + 2] = (byte)pixelBlue;
               this.m_pixelData[destPixelOffset + 3] = (byte)pixelAlpha;
            }
         }
      }