/// <summary> /// Sets the VerticalTransferOrder property, available only to objects in the same assembly as TargaHeader. /// </summary> /// <param name="eVerticalTransferOrder">One of the VerticalTransferOrder enumeration values.</param> protected internal void SetVerticalTransferOrder(VerticalTransferOrder eVerticalTransferOrder) { this.eVerticalTransferOrder = eVerticalTransferOrder; }
internal protected void SetVerticalTransferOrder(VerticalTransferOrder eVerticalTransferOrder) { this.eVerticalTransferOrder = eVerticalTransferOrder; }
/// <summary> /// Sets the VerticalTransferOrder property, available only to objects in the same assembly as TargaHeader. /// </summary> /// <param name="eVerticalTransferOrder">One of the VerticalTransferOrder enumeration values.</param> protected internal void SetVerticalTransferOrder(VerticalTransferOrder eVerticalTransferOrder) { VerticalTransferOrder = eVerticalTransferOrder; }
internal bool Parse(string fileName, out Texture texture) { byte[] filebytes = File.ReadAllBytes(fileName); if (filebytes.Length > 0) { using (MemoryStream filestream = new MemoryStream(filebytes)) { if (filestream.Length > 0 && filestream.CanSeek) { using (BinaryReader binReader = new BinaryReader(filestream)) { //First we need to read the footer try { //Start reading at 18 bytes from the end of the file binReader.BaseStream.Seek(-18, SeekOrigin.End); //Read the signature string to it's textual representation var Signature = System.Text.Encoding.ASCII.GetString(binReader.ReadBytes(16)).TrimEnd('\0'); if (String.CompareOrdinal(Signature, "TRUEVISION-XFILE") == 0) { //This is a new TGA format file, so we must read the footer information NewTGA = true; //Reset seek position binReader.BaseStream.Seek((-26), SeekOrigin.End); //Read the extension area offset ExtensionAreaOffset = binReader.ReadInt32(); //Read the developer directory offset DeveloperDirectoryOffset = binReader.ReadInt32(); //Skip signature binReader.ReadBytes(16); //Read the reserved character ReservedCharacter = System.Text.Encoding.ASCII.GetString(binReader.ReadBytes(1)).TrimEnd('\0'); } else { //This is an old TGA format file } } catch { //Failed to load the footer information from the TGA file.... CurrentHost.ReportProblem(ProblemType.InvalidOperation, "Failed to load TGA footer."); texture = null; return(false); } //Now read the basic header.... try { //Start reading at the start of the file binReader.BaseStream.Seek(0, SeekOrigin.Begin); //ImageID Length ImageIDLength = binReader.ReadByte(); //Byte showing the color map type ==> Either none or has a color map var ColorMapByte = binReader.ReadByte(); if (ColorMapByte == 0) { HasColorMap = false; } else { HasColorMap = true; } //Byte showing the image type ImageType = (ImageTypes)binReader.ReadByte(); //16-bit integer showing the first entry in the color map binReader.ReadInt16(); //16-bit integer showing the length of the color map ColorMapLength = binReader.ReadInt16(); //Byte showing the size of a color map entry ColorMapEntrySize = binReader.ReadByte(); //16-bit integer showing the X-origin binReader.ReadInt16(); //16-bit integer showing the Y-origin binReader.ReadInt16(); //16-bit integer showing the image width ImageWidth = binReader.ReadInt16(); //16-bit integer showing the image height ImageHeight = binReader.ReadInt16(); //Byte showing the pixel depth PixelDepth = binReader.ReadByte(); ImageDescriptor = binReader.ReadByte(); AttributeBits = (ImageDescriptor >> 0) & ((1 << 4) - 1); verticalTransferOrder = (VerticalTransferOrder)((ImageDescriptor >> 5) & ((1 << 1) - 1)); horizontalTransferOrder = (HorizontalTransferOrder)((ImageDescriptor >> 4) & ((1 << 1) - 1)); // load ImageID value if any if (ImageIDLength > 0) { byte[] ImageIDValueBytes = binReader.ReadBytes(ImageIDLength); ImageID = System.Text.Encoding.ASCII.GetString(ImageIDValueBytes).TrimEnd('\0'); } } catch { //Failed to load the basic header information from the TGA file.... CurrentHost.ReportProblem(ProblemType.InvalidOperation, "Failed to load TGA header."); texture = null; return(false); } //Next, we need to read the color map if one is included if (HasColorMap) { if (ColorMapLength > 0) { try { for (int i = 0; i < ColorMapLength; i++) { int a, b, g, r; // load each color map entry based on the ColorMapEntrySize value switch (ColorMapEntrySize) { case 15: byte[] color15 = binReader.ReadBytes(2); ColorMap.Add(GetColorFrom2Bytes(color15[1], color15[0])); break; case 16: byte[] color16 = binReader.ReadBytes(2); ColorMap.Add(GetColorFrom2Bytes(color16[1], color16[0])); break; case 24: b = Convert.ToInt32(binReader.ReadByte()); g = Convert.ToInt32(binReader.ReadByte()); r = Convert.ToInt32(binReader.ReadByte()); ColorMap.Add(Color.FromArgb(r, g, b)); break; case 32: a = Convert.ToInt32(binReader.ReadByte()); b = Convert.ToInt32(binReader.ReadByte()); g = Convert.ToInt32(binReader.ReadByte()); r = Convert.ToInt32(binReader.ReadByte()); ColorMap.Add(Color.FromArgb(a, r, g, b)); break; default: //No other entry sizes than 15, 16, 24 & 32 are supported.... throw new NotSupportedException(); } } } catch { CurrentHost.ReportProblem(ProblemType.InvalidOperation, "TGA ColorMap not correctly formatted."); //Color map not correctly formatted texture = null; return(false); } } else { //Image requires a color map, and one is not present CurrentHost.ReportProblem(ProblemType.InvalidOperation, "TGA Image requires a color map which is not present."); texture = null; return(false); } } //Read the extension area if applicable if (NewTGA) { try { //Reset seek position to the start of the extension area binReader.BaseStream.Seek(ExtensionAreaOffset, SeekOrigin.Begin); //Get the size of the extension area ExtensionAreaSize = (int)binReader.ReadInt16(); //Skip the author name- We don't need this binReader.ReadBytes(41); //Skip the author comments- We don't need this binReader.ReadBytes(324); //Date & time values, again we don't need these binReader.ReadInt16(); binReader.ReadInt16(); binReader.ReadInt16(); binReader.ReadInt16(); binReader.ReadInt16(); binReader.ReadInt16(); //Skip the job name binReader.ReadBytes(41); //Job date & time values binReader.ReadInt16(); binReader.ReadInt16(); binReader.ReadInt16(); //ID name of software which wrote the file, skip binReader.ReadBytes(41); //Software version number & letter binReader.ReadInt16(); binReader.ReadBytes(1); //Aha- Something useful, set the key color var a = (int)binReader.ReadByte(); var r = (int)binReader.ReadByte(); var b = (int)binReader.ReadByte(); var g = (int)binReader.ReadByte(); ExtensionAreaKeyColor = Color.FromArgb(a, r, g, b); PixelAspectRatioNumerator = (int)binReader.ReadInt16(); PixelAspectRatioDenominator = (int)binReader.ReadInt16(); GammaNumerator = (int)binReader.ReadInt16(); GammaDenominator = (int)binReader.ReadInt16(); ColorCorrectionOffset = binReader.ReadInt32(); PostageStampOffset = binReader.ReadInt32(); ScanLineOffset = binReader.ReadInt32(); AttributesType = (int)binReader.ReadByte(); //If a scan line table offset is included, read this if (ScanLineOffset > 0) { binReader.BaseStream.Seek(ScanLineOffset, SeekOrigin.Begin); for (int i = 0; i < ImageHeight; i++) { ScanLineTable.Add(binReader.ReadInt32()); } } //If a color correction table is included, read this if (ColorCorrectionOffset > 0) { binReader.BaseStream.Seek(ColorCorrectionOffset, SeekOrigin.Begin); for (int i = 0; i < 256; i++) { a = (int)binReader.ReadInt16(); r = (int)binReader.ReadInt16(); b = (int)binReader.ReadInt16(); g = (int)binReader.ReadInt16(); ColorCorrectionTable.Add(Color.FromArgb(a, r, g, b)); } } } catch { //Extension area not correctly formatted CurrentHost.ReportProblem(ProblemType.InvalidOperation, "TGA Extension Area not correctly formatted."); texture = null; return(false); } //We should now have all the data required to read our image into memory //Calculate the stride value var stride = (((int)ImageWidth * (int)PixelDepth + 31) & ~31) >> 3; //Calculate the padding value var padding = stride - ((((int)ImageWidth * (int)PixelDepth) + 7) / 8); //Next, load the image data into memory //Create the padding array, as stride must be a multiple of 4 byte[] paddingBytes = new byte[padding]; //Create the temporary row lists var rows = new List <List <byte> >(); var row = new List <byte>(); //Calculate the offset & seek to the start of the image data var ImageDataOffset = 18 + ImageIDLength; int Bytes = 0; switch (ColorMapEntrySize) { case 15: ImageDataOffset += 2 * ColorMapLength; break; case 16: Bytes = 2 * ColorMapLength; break; case 24: Bytes = 3 * ColorMapLength; break; case 32: Bytes = 4 * ColorMapLength; break; } ImageDataOffset += Bytes; binReader.BaseStream.Seek(ImageDataOffset, SeekOrigin.Begin); //Size in bytes for each row int ImageRowByteSize = (int)ImageWidth * ((int)(PixelDepth / 8)); //Size in bytes for whole image int ImageByteSize = ImageRowByteSize * (int)ImageHeight; if (ImageType == ImageTypes.CompressedColorMapped || ImageType == ImageTypes.CompressedRGB || ImageType == ImageTypes.CompressedGreyscale) { var BytesRead = 0; var RowBytesRead = 0; //Read image while (BytesRead < ImageByteSize) { var Packet = binReader.ReadByte(); var PacketType = (Packet >> 7) & ((1 << 1) - 1); var PixelCount = ((Packet >> 0) & ((1 << 7) - 1)) + 1; if (PacketType == 1) { byte[] Pixel = binReader.ReadBytes((int)PixelDepth / 8); for (int i = 0; i < PixelCount; i++) { foreach (byte b in Pixel) { row.Add(b); } RowBytesRead += Pixel.Length; BytesRead += Pixel.Length; //If this is a full row, addit to the list of rows, clear it and restart the counter if (RowBytesRead == ImageRowByteSize) { rows.Add(row); row = new List <byte>(); RowBytesRead = 0; } } } else { int BytesToRead = PixelCount * (int)((int)PixelDepth / 8); for (int i = 0; i < BytesToRead; i++) { row.Add(binReader.ReadByte()); BytesRead++; RowBytesRead++; //If this is a full row, addit to the list of rows, clear it and restart the counter if (RowBytesRead == ImageRowByteSize) { rows.Add(row); row = new List <byte>(); RowBytesRead = 0; } } } } } else { for (int i = 0; i < (int)ImageHeight; i++) { for (int j = 0; j < ImageRowByteSize; j++) { row.Add(binReader.ReadByte()); } rows.Add(row); row = new List <byte>(); } } bool reverseRows = false; bool reverseBytes = false; //We now need to get the location of the first pixel to see if the rows need to be reversed when converted to bitmap switch (firstPixelDestination) { case FirstPixelDestination.TopLeft: reverseRows = false; reverseBytes = true; break; case FirstPixelDestination.TopRight: reverseRows = false; reverseBytes = false; break; case FirstPixelDestination.BottomLeft: reverseRows = true; reverseBytes = true; break; case FirstPixelDestination.BottomRight: case FirstPixelDestination.Unknown: reverseRows = true; reverseBytes = true; break; } //Check and reverse rows & bytes if necessary if (reverseRows) { rows.Reverse(); } if (reverseBytes) { for (int i = 0; i < rows.Count; i++) { rows[i].Reverse(); } } byte[] ImageData; //Now create the final array using MemoryStream using (MemoryStream memoryStream = new MemoryStream()) { for (int i = 0; i < rows.Count; i++) { byte[] RowBytes = rows[i].ToArray(); //Write out the row and padding into the memorystream memoryStream.Write(RowBytes, 0, RowBytes.Length); memoryStream.Write(paddingBytes, 0, paddingBytes.Length); } //Convert the contents of the memorystream to our array ImageData = memoryStream.ToArray(); } //Convert the byte array into a bitmap //First, calculate the stride var Stride = (((int)ImageWidth * (int)PixelDepth + 31) & ~31) >> 3; //We now need to calculate the pixel depth from the image attributes PixelFormat CurrentPixelFormat = PixelFormat.Undefined; switch (PixelDepth) { case 8: CurrentPixelFormat = PixelFormat.Format8bppIndexed; break; case 16: if (NewTGA && ExtensionAreaOffset > 0) { switch (AttributesType) { case 0: case 1: case 2: CurrentPixelFormat = PixelFormat.Format16bppRgb555; break; case 3: CurrentPixelFormat = PixelFormat.Format16bppArgb1555; break; } } else { if (AttributeBits == 0) { CurrentPixelFormat = PixelFormat.Format16bppRgb555; } if (AttributeBits == 1) { CurrentPixelFormat = PixelFormat.Format16bppArgb1555; } } break; case 24: CurrentPixelFormat = PixelFormat.Format24bppRgb; break; case 32: if (NewTGA && ExtensionAreaOffset > 0) { switch (AttributesType) { case 0: case 1: case 2: CurrentPixelFormat = PixelFormat.Format32bppRgb; break; case 3: CurrentPixelFormat = PixelFormat.Format32bppArgb; break; case 4: CurrentPixelFormat = PixelFormat.Format32bppPArgb; break; } } else { if (AttributeBits == 0) { CurrentPixelFormat = PixelFormat.Format32bppRgb; } if (AttributeBits == 8) { CurrentPixelFormat = PixelFormat.Format32bppArgb; } } break; } //Create a pinned GC handle to our new byte array ByteArrayHandle = GCHandle.Alloc(ImageData, GCHandleType.Pinned); bitmap = new Bitmap((int)ImageWidth, (int)ImageHeight, Stride, CurrentPixelFormat, ByteArrayHandle.AddrOfPinnedObject()); //Free it again ByteArrayHandle.Free(); //Load color map if (ColorMap.Count > 0) { ColorPalette currentPalette = bitmap.Palette; for (int i = 0; i < ColorMap.Count; i++) { bool forceopaque = false; if (NewTGA && ExtensionAreaOffset > 0) { if (AttributesType == 0 || AttributesType == 1) { forceopaque = true; } } else if (AttributeBits == 0 || AttributeBits == 1) { forceopaque = true; } if (forceopaque) { // use 255 for alpha ( 255 = opaque/visible ) so we can see the image currentPalette.Entries[i] = Color.FromArgb(255, ColorMap[i].R, ColorMap[i].G, ColorMap[i].B); } else { // use whatever value is there currentPalette.Entries[i] = ColorMap[i]; } } // set the new palette back to the Bitmap object bitmap.Palette = currentPalette; } else { if (PixelDepth == 8 && (ImageType == ImageTypes.UncompressedGreyscale || ImageType == ImageTypes.CompressedGreyscale)) { // get the current palette ColorPalette currentPalette = bitmap.Palette; // create the Greyscale palette for (int i = 0; i < 256; i++) { currentPalette.Entries[i] = Color.FromArgb(i, i, i); } // set the new palette back to the Bitmap object bitmap.Palette = currentPalette; } } } } } } } /* * Read the bitmap. This will be a bitmap of just * any format, not necessarily the one that allows * us to extract the bitmap data easily. * */ Rectangle rect = new Rectangle(0, 0, bitmap.Width, bitmap.Height); /* * If the bitmap format is not already 32-bit BGRA, * then convert it to 32-bit BGRA. * */ if (bitmap.PixelFormat != PixelFormat.Format32bppArgb) { Bitmap compatibleBitmap = new Bitmap(bitmap.Width, bitmap.Height, PixelFormat.Format32bppArgb); Graphics graphics = Graphics.FromImage(compatibleBitmap); graphics.DrawImage(bitmap, rect, rect, GraphicsUnit.Pixel); graphics.Dispose(); bitmap.Dispose(); bitmap = compatibleBitmap; } /* * Extract the raw bitmap data. * */ BitmapData data = bitmap.LockBits(rect, ImageLockMode.ReadOnly, bitmap.PixelFormat); if (data.Stride == 4 * data.Width) { /* * Copy the data from the bitmap * to the array in BGRA format. * */ byte[] raw = new byte[data.Stride * data.Height]; Marshal.Copy(data.Scan0, raw, 0, data.Stride * data.Height); bitmap.UnlockBits(data); int width = bitmap.Width; int height = bitmap.Height; bitmap.Dispose(); /* * Change the byte order from BGRA to RGBA. * */ for (int i = 0; i < raw.Length; i += 4) { byte temp = raw[i]; raw[i] = raw[i + 2]; raw[i + 2] = temp; } texture = new Texture(width, height, 32, raw, null); return(true); } else { /* * The stride is invalid. This indicates that the * CLI either does not implement the conversion to * 32-bit BGRA correctly, or that the CLI has * applied additional padding that we do not * support. * */ bitmap.UnlockBits(data); bitmap.Dispose(); CurrentHost.ReportProblem(ProblemType.InvalidOperation, "Invalid stride encountered."); texture = null; return(false); } }