//-----------------------------------------------------------------------
public static void ToAxiom(PixelBox dst)
{
if (!dst.Consecutive)
{
throw new NotImplementedException("Destination must currently be consecutive");
}
if (dst.Width != Il.ilGetInteger(Il.IL_IMAGE_WIDTH) ||
dst.Height != Il.ilGetInteger(Il.IL_IMAGE_HEIGHT) ||
dst.Depth != Il.ilGetInteger(Il.IL_IMAGE_DEPTH))
{
throw new AxiomException("Destination dimensions must equal IL dimension");
}
int ilfmt = Il.ilGetInteger(Il.IL_IMAGE_FORMAT);
int iltp = Il.ilGetInteger(Il.IL_IMAGE_TYPE);
// Check if in-memory format just matches
// If yes, we can just copy it and save conversion
ILFormat ifmt = ILUtil.ConvertToILFormat(dst.Format);
if (ifmt.format == ilfmt && ILabs(ifmt.type) == ILabs(iltp))
{
int size = Il.ilGetInteger(Il.IL_IMAGE_SIZE_OF_DATA);
// Copy from the IL structure to our buffer
PixelUtil.CopyBytes(dst.Data, dst.Offset, Il.ilGetData(), 0, size);
return;
}
// Try if buffer is in a known OGRE format so we can use OGRE its
// conversion routines
PixelFormat bufFmt = ILUtil.ConvertFromILFormat(ilfmt, iltp);
ifmt = ILUtil.ConvertToILFormat(bufFmt);
if (ifmt.format == ilfmt && ILabs(ifmt.type) == ILabs(iltp))
{
// IL format matches another OGRE format
PixelBox src = new PixelBox(dst.Width, dst.Height, dst.Depth, bufFmt, Il.ilGetData());
PixelUtil.BulkPixelConversion(src, dst);
return;
}
#if NOT
// The extremely slow method
if (iltp == Il.IL_UNSIGNED_BYTE || iltp == Il.IL_BYTE)
{
ilToOgreInternal(static_cast <uint8 *>(dst.data), dst.format, (uint8)0x00, (uint8)0x00, (uint8)0x00, (uint8)0xFF);
}
else if (iltp == IL_FLOAT)
{
ilToOgreInternal(static_cast <uint8 *>(dst.data), dst.format, 0.0f, 0.0f, 0.0f, 1.0f);
}
else if (iltp == IL_SHORT || iltp == IL_UNSIGNED_SHORT)
{
ilToOgreInternal(static_cast <uint8 *>(dst.data), dst.format,
(uint16)0x0000, (uint16)0x0000, (uint16)0x0000, (uint16)0xFFFF);
}
else
{
OGRE_EXCEPT(Exception::UNIMPLEMENTED_FEATURE,
"Cannot convert this DevIL type",
"ILUtil::ilToOgre");
}
#else
throw new NotImplementedException("Cannot convert this DevIL type");
#endif
}
public override object Decode(Stream input, Stream output, params object[] args)
{
ImageData data = new ImageData();
int imageID;
int format, bytesPerPixel, imageType;
// create and bind a new image
Il.ilGenImages(1, out imageID);
Il.ilBindImage(imageID);
// Put it right side up
Il.ilEnable(Il.IL_ORIGIN_SET);
Il.ilSetInteger(Il.IL_ORIGIN_MODE, Il.IL_ORIGIN_UPPER_LEFT);
// Keep DXTC(compressed) data if present
Il.ilSetInteger(Il.IL_KEEP_DXTC_DATA, Il.IL_TRUE);
// create a temp buffer and write the stream into it
byte[] buffer = new byte[input.Length];
input.Read(buffer, 0, buffer.Length);
// load the data into DevIL
Il.ilLoadL(this.ILType, buffer, buffer.Length);
// check for an error
int ilError = Il.ilGetError();
if (ilError != Il.IL_NO_ERROR)
{
throw new AxiomException("Error while decoding image data: '{0}'", Ilu.iluErrorString(ilError));
}
format = Il.ilGetInteger(Il.IL_IMAGE_FORMAT);
imageType = Il.ilGetInteger(Il.IL_IMAGE_TYPE);
//bytesPerPixel = Math.Max(Il.ilGetInteger(Il.IL_IMAGE_BPC),
// Il.ilGetInteger(Il.IL_IMAGE_BYTES_PER_PIXEL));
// Convert image if ImageType is incompatible with us (double or long)
if (imageType != Il.IL_BYTE && imageType != Il.IL_UNSIGNED_BYTE &&
imageType != Il.IL_FLOAT &&
imageType != Il.IL_UNSIGNED_SHORT && imageType != Il.IL_SHORT)
{
Il.ilConvertImage(format, Il.IL_FLOAT);
imageType = Il.IL_FLOAT;
}
// Converted paletted images
if (format == Il.IL_COLOUR_INDEX)
{
Il.ilConvertImage(Il.IL_BGRA, Il.IL_UNSIGNED_BYTE);
format = Il.IL_BGRA;
imageType = Il.IL_UNSIGNED_BYTE;
}
bytesPerPixel = Il.ilGetInteger(Il.IL_IMAGE_BYTES_PER_PIXEL);
// populate the image data
data.format = ILUtil.ConvertFromILFormat(format, imageType);
data.width = Il.ilGetInteger(Il.IL_IMAGE_WIDTH);
data.height = Il.ilGetInteger(Il.IL_IMAGE_HEIGHT);
data.depth = Il.ilGetInteger(Il.IL_IMAGE_DEPTH);
data.numMipMaps = Il.ilGetInteger(Il.IL_NUM_MIPMAPS);
data.flags = 0;
if (data.format == PixelFormat.Unknown)
{
Il.ilDeleteImages(1, ref imageID);
throw new AxiomException("Unsupported DevIL format: ImageFormat = {0:x} ImageType = {1:x}", format, imageType);
}
// Check for cubemap
// int cubeflags = Il.ilGetInteger(Il.IL_IMAGE_CUBEFLAGS);
int numFaces = Il.ilGetInteger(Il.IL_NUM_IMAGES) + 1;
if (numFaces == 6)
{
data.flags |= ImageFlags.CubeMap;
}
else
{
numFaces = 1; // Support only 1 or 6 face images for now
}
// Keep DXT data (if present at all and the GPU supports it)
int dxtFormat = Il.ilGetInteger(Il.IL_DXTC_DATA_FORMAT);
if (dxtFormat != Il.IL_DXT_NO_COMP &&
Root.Instance.RenderSystem.Caps.CheckCap(Axiom.Graphics.Capabilities.TextureCompressionDXT))
{
data.format = ILUtil.ConvertFromILFormat(dxtFormat, imageType);
data.flags |= ImageFlags.Compressed;
// Validate that this devil version saves DXT mipmaps
if (data.numMipMaps > 0)
{
Il.ilBindImage(imageID);
Il.ilActiveMipmap(1);
if (Il.ilGetInteger(Il.IL_DXTC_DATA_FORMAT) != dxtFormat)
{
data.numMipMaps = 0;
LogManager.Instance.Write("Warning: Custom mipmaps for compressed image were ignored because they are not loaded by this DevIL version");
}
}
}
// Calculate total size from number of mipmaps, faces and size
data.size = Image.CalculateSize(data.numMipMaps, numFaces,
data.width, data.height,
data.depth, data.format);
// set up buffer for the decoded data
buffer = new byte[data.size];
// Pin the buffer, so we can use our PixelBox methods on it
GCHandle bufGCHandle = new GCHandle();
bufGCHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
IntPtr bufPtr = bufGCHandle.AddrOfPinnedObject();
int offset = 0;
// Dimensions of current mipmap
int width = data.width;
int height = data.height;
int depth = data.depth;
// Transfer data
for (int mip = 0; mip <= data.numMipMaps; ++mip)
{
for (int i = 0; i < numFaces; ++i)
{
Il.ilBindImage(imageID);
if (numFaces > 1)
{
Il.ilActiveImage(i);
}
if (data.numMipMaps > 0)
{
Il.ilActiveMipmap(mip);
}
/// Size of this face
int imageSize = PixelUtil.GetMemorySize(width, height, depth, data.format);
if ((data.flags & ImageFlags.Compressed) != 0)
{
// Compare DXT size returned by DevIL with our idea of the compressed size
if (imageSize == Il.ilGetDXTCData(IntPtr.Zero, 0, dxtFormat))
{
// Retrieve data from DevIL
byte[] tmpBuffer = new byte[imageSize];
Il.ilGetDXTCData(tmpBuffer, imageSize, dxtFormat);
// Copy the data into our output buffer
Array.Copy(tmpBuffer, 0, buffer, offset, tmpBuffer.Length);
}
else
{
LogManager.Instance.Write("Warning: compressed image size mismatch, devilsize={0} oursize={1}",
Il.ilGetDXTCData(IntPtr.Zero, 0, dxtFormat), imageSize);
}
}
else
{
/// Retrieve data from DevIL
PixelBox dst = new PixelBox(width, height, depth, data.format, bufPtr);
dst.Offset = offset;
ILUtil.ToAxiom(dst);
}
offset += imageSize;
}
/// Next mip
if (width != 1)
{
width /= 2;
}
if (height != 1)
{
height /= 2;
}
if (depth != 1)
{
depth /= 2;
}
}
// Restore IL state
Il.ilDisable(Il.IL_ORIGIN_SET);
Il.ilDisable(Il.IL_FORMAT_SET);
// we won't be needing this anymore
Il.ilDeleteImages(1, ref imageID);
output.Write(buffer, 0, buffer.Length);
// Free the buffer we allocated for the conversion.
// I used bufPtr to store my data while I converted it.
// I need to free it here. This invalidates bufPtr.
// My data has already been copied to output.
if (bufGCHandle.IsAllocated)
{
bufGCHandle.Free();
}
return(data);
}