//! \file ImageTGA.cs //! \date Fri Jul 04 07:24:38 2014 //! \brief Targa image implementation. // // Copyright (C) 2014 by morkt // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to // deal in the Software without restriction, including without limitation the // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or // sell copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS // IN THE SOFTWARE. // using System.IO; using System.Text; using System.Windows; using System.Windows.Media; using System.Windows.Media.Imaging; using System.ComponentModel.Composition; namespace GameRes { public class TgaMetaData : ImageMetaData { public short ImageType; public short ColormapType; public uint ColormapOffset; public ushort ColormapFirst; public ushort ColormapLength; public short ColormapDepth; public short Descriptor; } [Export(typeof(ImageFormat))] public class TgaFormat : ImageFormat { public override string Tag { get { return "TGA"; } } public override string Description { get { return "Truevision TGA image"; } } public override uint Signature { get { return 0; } } public override ImageData Read (Stream stream, ImageMetaData metadata) { var meta = metadata as TgaMetaData; if (null == meta) throw new System.ArgumentException ("TgaFormat.Read should be supplied with TgaMetaData", "metadata"); int colormap_size = meta.ColormapLength * meta.ColormapDepth / 8; int width = (int)meta.Width; int height = (int)meta.Height; int bpp = meta.BPP; long image_offset = meta.ColormapOffset; if (1 == meta.ColormapType) image_offset += colormap_size; switch (meta.ImageType) { case 1: // Uncompressed, color-mapped images. case 3: // Uncompressed, black and white images. case 9: // Runlength encoded color-mapped images. case 10: // Runlength encoded RGB images. case 11: // Compressed, black and white images. case 32: // Compressed color-mapped data, using Huffman, Delta, and // runlength encoding. case 33: // Compressed color-mapped data, using Huffman, Delta, and // runlength encoding. 4-pass quadtree-type process. throw new System.NotImplementedException(); default: throw new InvalidFormatException(); case 2: // Uncompressed, RGB images. { PixelFormat pixel_format; switch (bpp) { default: throw new InvalidFormatException(); case 24: pixel_format = PixelFormats.Bgr24; break; case 32: pixel_format = PixelFormats.Bgra32; break; case 15: pixel_format = PixelFormats.Bgr555; break; case 16: pixel_format = PixelFormats.Bgr565; break; } stream.Position = image_offset; int stride = width*((bpp+7)/8); byte[] data = new byte[stride*height]; if (0 != (meta.Descriptor & 0x20)) { if (data.Length != stream.Read (data, 0, data.Length)) throw new InvalidFormatException(); } else { for (int row = height-1; row >= 0; --row) { if (stride != stream.Read (data, row*stride, stride)) throw new InvalidFormatException(); } } var bitmap = BitmapSource.Create (width, height, 96, 96, pixel_format, null, data, stride); bitmap.Freeze(); return new ImageData (bitmap, meta); } throw new InvalidFormatException(); } } public override void Write (Stream stream, ImageData image) { using (var file = new BinaryWriter (stream, System.Text.Encoding.ASCII, true)) { file.Write ((byte)0); // idlength file.Write ((byte)0); // colourmaptype file.Write ((byte)2); // datatypecode file.Write ((short)0); // colourmaporigin file.Write ((short)0); // colourmaplength file.Write ((byte)0); // colourmapdepth file.Write ((short)image.OffsetX); file.Write ((short)image.OffsetY); file.Write ((ushort)image.Width); file.Write ((ushort)image.Height); var bitmap = image.Bitmap; int bpp = 0; int stride = 0; byte descriptor = 0; if (PixelFormats.Bgr24 == bitmap.Format) { bpp = 24; stride = (int)image.Width*3; } else if (PixelFormats.Bgr32 == bitmap.Format) { bpp = 32; stride = (int)image.Width*4; } else { bpp = 32; stride = (int)image.Width*4; if (PixelFormats.Bgra32 != bitmap.Format) { var converted_bitmap = new FormatConvertedBitmap(); converted_bitmap.BeginInit(); converted_bitmap.Source = image.Bitmap; converted_bitmap.DestinationFormat = PixelFormats.Bgra32; converted_bitmap.EndInit(); bitmap = converted_bitmap; } } file.Write ((byte)bpp); file.Write (descriptor); byte[] row_data = new byte[stride]; Int32Rect rect = new Int32Rect (0, (int)image.Height, (int)image.Width, 1); for (uint row = 0; row < image.Height; ++row) { --rect.Y; bitmap.CopyPixels (rect, row_data, stride, 0); file.Write (row_data); } } } public override ImageMetaData ReadMetaData (Stream stream) { using (var file = new ArcView.Reader (stream)) { short id_length = file.ReadByte(); short colormap_type = file.ReadByte(); if (colormap_type > 1) return null; short image_type = file.ReadByte(); ushort colormap_first = file.ReadUInt16(); ushort colormap_length = file.ReadUInt16(); short colormap_depth = file.ReadByte(); int pos_x = file.ReadInt16(); int pos_y = file.ReadInt16(); uint width = file.ReadUInt16(); uint height = file.ReadUInt16(); int bpp = file.ReadByte(); if (bpp != 32 && bpp != 24 && bpp != 16 && bpp != 15 && bpp != 8) return null; short descriptor = file.ReadByte(); uint colormap_offset = (uint)(18 + id_length); switch (image_type) { default: return null; case 1: // Uncompressed, color-mapped images. case 2: // Uncompressed, RGB images. case 3: // Uncompressed, black and white images. case 9: // Runlength encoded color-mapped images. case 10: // Runlength encoded RGB images. case 11: // Compressed, black and white images. case 32: // Compressed color-mapped data, using Huffman, Delta, and // runlength encoding. case 33: // Compressed color-mapped data, using Huffman, Delta, and // runlength encoding. 4-pass quadtree-type process. break; } return new TgaMetaData { OffsetX = pos_x, OffsetY = pos_y, Width = width, Height = height, BPP = bpp, ImageType = image_type, ColormapType = colormap_type, ColormapOffset = colormap_offset, ColormapFirst = colormap_first, ColormapLength = colormap_length, ColormapDepth = colormap_depth, Descriptor = descriptor, }; } } } }