public static unsafe void ToStream(Bitmap bmp, FileStream stream)
{
int w = bmp.Width, h = bmp.Height;
TGAHeader header = new TGAHeader();
TGAFooter footer = new TGAFooter(0, 0);
PaletteEncoder pEnc = null;
ColorParser cEnc = null;
ColorPalette pal = null;
header.imageSpecification.width = (ushort)w;
header.imageSpecification.height = (ushort)h;
header.imageType = TGAImageType.UncompressedTrueColor;
switch (bmp.PixelFormat)
{
case PixelFormat.Format4bppIndexed:
case PixelFormat.Format8bppIndexed:
{
pal = bmp.Palette;
header.colorMapType = 1;
header.imageType = TGAImageType.UncompressedColorMapped;
header.colorMapSpecification.length = (ushort)pal.Entries.Length;
header.colorMapSpecification.entrySize = 24;
header.imageSpecification.pixelDepth = 8;
pEnc = (ref VoidPtr ptr, Color c) => { *(RGBPixel *)ptr = (RGBPixel)c; ptr += 3; };
if (bmp.PixelFormat == PixelFormat.Format4bppIndexed)
{
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((byte *)dPtr)[dIndex] = ((sIndex & 1) == 0) ? (byte)(((byte *)sPtr)[sIndex >> 1] >> 4) : (byte)(((byte *)sPtr)[sIndex >> 1] & 0xF); }
}
;
else
{
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((byte *)dPtr)[dIndex] = ((byte *)sPtr)[sIndex]; }
};
break;
}
case PixelFormat.Format32bppRgb:
case PixelFormat.Format32bppArgb:
{
header.imageSpecification.pixelDepth = 32;
header.imageSpecification.AlphaBits = (bmp.PixelFormat == PixelFormat.Format32bppArgb) ? (byte)8 : (byte)0;
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((ARGBPixel *)dPtr)[dIndex] = ((ARGBPixel *)sPtr)[sIndex]; };
break;
}
case PixelFormat.Format24bppRgb:
{
header.imageSpecification.pixelDepth = 24;
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((RGBPixel *)dPtr)[dIndex] = ((RGBPixel *)sPtr)[sIndex]; };
break;
}
case PixelFormat.Format16bppRgb555:
{
header.imageSpecification.pixelDepth = 15;
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((RGB555Pixel *)dPtr)[dIndex] = ((RGB555Pixel *)sPtr)[sIndex]; };
break;
}
case PixelFormat.Format16bppArgb1555:
{
header.imageSpecification.pixelDepth = 16;
header.imageSpecification.AlphaBits = 1;
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((RGB555Pixel *)dPtr)[dIndex] = ((RGB555Pixel *)sPtr)[sIndex]; };
break;
}
default:
throw new FormatException("Input pixel format unsupported.");
}
int mapLen = header.colorMapSpecification.DataLength;
int dataLen = header.imageSpecification.DataLength;
int totalLen = TGAHeader.Size + mapLen + dataLen + TGAFooter.Size;
stream.SetLength(totalLen);
BitmapData data = bmp.LockBits(new Rectangle(0, 0, w, h), ImageLockMode.ReadOnly, bmp.PixelFormat);
//using (FileStream stream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None, 0x1000, FileOptions.RandomAccess))
using (FileMap view = FileMap.FromStream(stream))// stream.MapView(0, (uint)totalLen, FileMapProtect.ReadWrite))
{
//Create header
TGAHeader *pHeader = (TGAHeader *)view.Address;
* pHeader = header;
//Write id
//Write color map
if (pal != null)
{
VoidPtr pMap = pHeader->ColorMapData;
for (int i = 0; i < pal.Entries.Length; i++)
{
pEnc(ref pMap, pal.Entries[i]);
}
}
//Write color data
int dstStride = (pHeader->imageSpecification.pixelDepth * w).Align(8) / 8;
int origin = (int)pHeader->imageSpecification.ImageOrigin;
int xStep = ((origin & 1) == 0) ? 1 : -1;
int yStep = ((origin & 2) != 0) ? 1 : -1;
byte *imgDst = pHeader->ImageData;
for (int sY = (yStep == 1) ? 0 : h - 1, dY = 0; dY < h; sY += yStep, dY++)
{
VoidPtr imgSrc = (VoidPtr)data.Scan0 + (data.Stride * sY);
//Do RLE encoding
for (int sX = (xStep == 1) ? 0 : w - 1, dX = 0; dX < w; sX += xStep, dX++)
{
cEnc(imgSrc, sX, imgDst, dX);
}
imgDst += dstStride;
}
//Write footer
TGAFooter *pFooter = (TGAFooter *)(pHeader->ImageData + pHeader->imageSpecification.DataLength);
* pFooter = footer;
}
bmp.UnlockBits(data);
}
public static unsafe void ToStream(Bitmap bmp, FileStream stream)
{
int w = bmp.Width, h = bmp.Height;
TGAHeader header = new TGAHeader();
TGAFooter footer = new TGAFooter(0, 0);
PaletteEncoder pEnc = null;
ColorParser cEnc = null;
ColorPalette pal = null;
header.imageSpecification.width = (ushort)w;
header.imageSpecification.height = (ushort)h;
header.imageType = TGAImageType.UncompressedTrueColor;
switch (bmp.PixelFormat)
{
case PixelFormat.Format4bppIndexed:
case PixelFormat.Format8bppIndexed:
{
pal = bmp.Palette;
header.colorMapType = 1;
header.imageType = TGAImageType.UncompressedColorMapped;
header.colorMapSpecification.length = (ushort)pal.Entries.Length;
header.colorMapSpecification.entrySize = 24;
header.imageSpecification.pixelDepth = 8;
pEnc = (ref VoidPtr ptr, Color c) => { *(RGBPixel*)ptr = (RGBPixel)c; ptr += 3; };
if (bmp.PixelFormat == PixelFormat.Format4bppIndexed)
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((byte*)dPtr)[dIndex] = ((sIndex & 1) == 0) ? (byte)(((byte*)sPtr)[sIndex >> 1] >> 4) : (byte)(((byte*)sPtr)[sIndex >> 1] & 0xF); };
else
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((byte*)dPtr)[dIndex] = ((byte*)sPtr)[sIndex]; };
break;
}
case PixelFormat.Format32bppRgb:
case PixelFormat.Format32bppArgb:
{
header.imageSpecification.pixelDepth = 32;
header.imageSpecification.AlphaBits = (bmp.PixelFormat == PixelFormat.Format32bppArgb) ? (byte)8 : (byte)0;
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((ARGBPixel*)dPtr)[dIndex] = ((ARGBPixel*)sPtr)[sIndex]; };
break;
}
case PixelFormat.Format24bppRgb:
{
header.imageSpecification.pixelDepth = 24;
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((RGBPixel*)dPtr)[dIndex] = ((RGBPixel*)sPtr)[sIndex]; };
break;
}
case PixelFormat.Format16bppRgb555:
{
header.imageSpecification.pixelDepth = 15;
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((RGB555Pixel*)dPtr)[dIndex] = ((RGB555Pixel*)sPtr)[sIndex]; };
break;
}
case PixelFormat.Format16bppArgb1555:
{
header.imageSpecification.pixelDepth = 16;
header.imageSpecification.AlphaBits = 1;
cEnc = delegate(VoidPtr sPtr, int sIndex, VoidPtr dPtr, int dIndex)
{ ((RGB555Pixel*)dPtr)[dIndex] = ((RGB555Pixel*)sPtr)[sIndex]; };
break;
}
default:
throw new FormatException("Input pixel format unsupported.");
}
int mapLen = header.colorMapSpecification.DataLength;
int dataLen = header.imageSpecification.DataLength;
int totalLen = TGAHeader.Size + mapLen + dataLen + TGAFooter.Size;
stream.SetLength(totalLen);
BitmapData data = bmp.LockBits(new Rectangle(0, 0, w, h), ImageLockMode.ReadOnly, bmp.PixelFormat);
//using (FileStream stream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None, 0x1000, FileOptions.RandomAccess))
using (FileMap view = FileMap.FromStream(stream))// stream.MapView(0, (uint)totalLen, FileMapProtect.ReadWrite))
{
//Create header
TGAHeader* pHeader = (TGAHeader*)view.Address;
*pHeader = header;
//Write id
//Write color map
if (pal != null)
{
VoidPtr pMap = pHeader->ColorMapData;
for (int i = 0; i < pal.Entries.Length; i++)
pEnc(ref pMap, pal.Entries[i]);
}
//Write color data
int dstStride = (pHeader->imageSpecification.pixelDepth * w).Align(8) / 8;
int origin = (int)pHeader->imageSpecification.ImageOrigin;
int xStep = ((origin & 1) == 0) ? 1 : -1;
int yStep = ((origin & 2) != 0) ? 1 : -1;
byte* imgDst = pHeader->ImageData;
for (int sY = (yStep == 1) ? 0 : h - 1, dY = 0; dY < h; sY += yStep, dY++)
{
VoidPtr imgSrc = (VoidPtr)data.Scan0 + (data.Stride * sY);
//Do RLE encoding
for (int sX = (xStep == 1) ? 0 : w - 1, dX = 0; dX < w; sX += xStep, dX++)
cEnc(imgSrc, sX, imgDst, dX);
imgDst += dstStride;
}
//Write footer
TGAFooter* pFooter = (TGAFooter*)(pHeader->ImageData + pHeader->imageSpecification.DataLength);
*pFooter = footer;
}
bmp.UnlockBits(data);
}
