private BufferedImage CreateCompatibleDestImage(BufferedImage src, ColorModel destCM, ColorSpace destCS)
{
BufferedImage image;
if (destCM == null)
{
ColorModel srcCM = src.ColorModel;
int nbands = destCS.NumComponents;
bool hasAlpha = srcCM.HasAlpha();
if (hasAlpha)
{
nbands += 1;
}
int[] nbits = new int[nbands];
for (int i = 0; i < nbands; i++)
{
nbits[i] = 8;
}
destCM = new ComponentColorModel(destCS, nbits, hasAlpha, srcCM.AlphaPremultiplied, srcCM.Transparency, DataBuffer.TYPE_BYTE);
}
int w = src.Width;
int h = src.Height;
image = new BufferedImage(destCM, destCM.CreateCompatibleWritableRaster(w, h), destCM.AlphaPremultiplied, null);
return(image);
}
/// <summary>
/// Creates a zeroed destination image with the correct size and number of
/// bands. If destCM is <code>null</code>, an appropriate
/// <code>ColorModel</code> will be used. </summary>
/// <param name="src"> Source image for the filter operation. </param>
/// <param name="destCM"> the destination's <code>ColorModel</code>, which
/// can be <code>null</code>. </param>
/// <returns> a filtered destination <code>BufferedImage</code>. </returns>
public virtual BufferedImage CreateCompatibleDestImage(BufferedImage src, ColorModel destCM)
{
BufferedImage image;
int w = src.Width;
int h = src.Height;
int transferType = DataBuffer.TYPE_BYTE;
if (destCM == null)
{
ColorModel cm = src.ColorModel;
Raster raster = src.Raster;
if (cm is ComponentColorModel)
{
DataBuffer db = raster.DataBuffer;
bool hasAlpha = cm.HasAlpha();
bool isPre = cm.AlphaPremultiplied;
int trans = cm.Transparency;
int[] nbits = null;
if (Ltable is ByteLookupTable)
{
if (db.DataType == db.TYPE_USHORT)
{
// Dst raster should be of type byte
if (hasAlpha)
{
nbits = new int[2];
if (trans == cm.BITMASK)
{
nbits[1] = 1;
}
else
{
nbits[1] = 8;
}
}
else
{
nbits = new int[1];
}
nbits[0] = 8;
}
// For byte, no need to change the cm
}
else if (Ltable is ShortLookupTable)
{
transferType = DataBuffer.TYPE_USHORT;
if (db.DataType == db.TYPE_BYTE)
{
if (hasAlpha)
{
nbits = new int[2];
if (trans == cm.BITMASK)
{
nbits[1] = 1;
}
else
{
nbits[1] = 16;
}
}
else
{
nbits = new int[1];
}
nbits[0] = 16;
}
}
if (nbits != null)
{
cm = new ComponentColorModel(cm.ColorSpace, nbits, hasAlpha, isPre, trans, transferType);
}
}
image = new BufferedImage(cm, cm.CreateCompatibleWritableRaster(w, h), cm.AlphaPremultiplied, null);
}
else
{
image = new BufferedImage(destCM, destCM.CreateCompatibleWritableRaster(w, h), destCM.AlphaPremultiplied, null);
}
return(image);
}
/// <summary>
/// Performs a lookup operation on a <code>BufferedImage</code>.
/// If the color model in the source image is not the same as that
/// in the destination image, the pixels will be converted
/// in the destination. If the destination image is <code>null</code>,
/// a <code>BufferedImage</code> will be created with an appropriate
/// <code>ColorModel</code>. An <code>IllegalArgumentException</code>
/// might be thrown if the number of arrays in the
/// <code>LookupTable</code> does not meet the restrictions
/// stated in the class comment above, or if the source image
/// has an <code>IndexColorModel</code>. </summary>
/// <param name="src"> the <code>BufferedImage</code> to be filtered </param>
/// <param name="dst"> the <code>BufferedImage</code> in which to
/// store the results of the filter operation </param>
/// <returns> the filtered <code>BufferedImage</code>. </returns>
/// <exception cref="IllegalArgumentException"> if the number of arrays in the
/// <code>LookupTable</code> does not meet the restrictions
/// described in the class comments, or if the source image
/// has an <code>IndexColorModel</code>. </exception>
public BufferedImage Filter(BufferedImage src, BufferedImage dst)
{
ColorModel srcCM = src.ColorModel;
int numBands = srcCM.NumColorComponents;
ColorModel dstCM;
if (srcCM is IndexColorModel)
{
throw new IllegalArgumentException("LookupOp cannot be " + "performed on an indexed image");
}
int numComponents = Ltable.NumComponents;
if (numComponents != 1 && numComponents != srcCM.NumComponents && numComponents != srcCM.NumColorComponents)
{
throw new IllegalArgumentException("Number of arrays in the " + " lookup table (" + numComponents + " is not compatible with the " + " src image: " + src);
}
bool needToConvert = false;
int width = src.Width;
int height = src.Height;
if (dst == null)
{
dst = CreateCompatibleDestImage(src, null);
dstCM = srcCM;
}
else
{
if (width != dst.Width)
{
throw new IllegalArgumentException("Src width (" + width + ") not equal to dst width (" + dst.Width + ")");
}
if (height != dst.Height)
{
throw new IllegalArgumentException("Src height (" + height + ") not equal to dst height (" + dst.Height + ")");
}
dstCM = dst.ColorModel;
if (srcCM.ColorSpace.Type != dstCM.ColorSpace.Type)
{
needToConvert = true;
dst = CreateCompatibleDestImage(src, null);
}
}
BufferedImage origDst = dst;
if (ImagingLib.filter(this, src, dst) == null)
{
// Do it the slow way
WritableRaster srcRaster = src.Raster;
WritableRaster dstRaster = dst.Raster;
if (srcCM.HasAlpha())
{
if (numBands - 1 == numComponents || numComponents == 1)
{
int minx = srcRaster.MinX;
int miny = srcRaster.MinY;
int[] bands = new int[numBands - 1];
for (int i = 0; i < numBands - 1; i++)
{
bands[i] = i;
}
srcRaster = srcRaster.CreateWritableChild(minx, miny, srcRaster.Width, srcRaster.Height, minx, miny, bands);
}
}
if (dstCM.HasAlpha())
{
int dstNumBands = dstRaster.NumBands;
if (dstNumBands - 1 == numComponents || numComponents == 1)
{
int minx = dstRaster.MinX;
int miny = dstRaster.MinY;
int[] bands = new int[numBands - 1];
for (int i = 0; i < numBands - 1; i++)
{
bands[i] = i;
}
dstRaster = dstRaster.CreateWritableChild(minx, miny, dstRaster.Width, dstRaster.Height, minx, miny, bands);
}
}
Filter(srcRaster, dstRaster);
}
if (needToConvert)
{
// ColorModels are not the same
ColorConvertOp ccop = new ColorConvertOp(Hints);
ccop.Filter(dst, origDst);
}
return(origDst);
}
private BufferedImage NonICCBIFilter(BufferedImage src, ColorSpace srcColorSpace, BufferedImage dst, ColorSpace dstColorSpace)
{
int w = src.Width;
int h = src.Height;
ICC_ColorSpace ciespace = (ICC_ColorSpace)ColorSpace.GetInstance(ColorSpace.CS_CIEXYZ);
if (dst == null)
{
dst = CreateCompatibleDestImage(src, null);
dstColorSpace = dst.ColorModel.ColorSpace;
}
else
{
if ((h != dst.Height) || (w != dst.Width))
{
throw new IllegalArgumentException("Width or height of BufferedImages do not match");
}
}
Raster srcRas = src.Raster;
WritableRaster dstRas = dst.Raster;
ColorModel srcCM = src.ColorModel;
ColorModel dstCM = dst.ColorModel;
int srcNumComp = srcCM.NumColorComponents;
int dstNumComp = dstCM.NumColorComponents;
bool dstHasAlpha = dstCM.HasAlpha();
bool needSrcAlpha = srcCM.HasAlpha() && dstHasAlpha;
ColorSpace[] list;
if ((CSList == null) && (ProfileList.Length != 0))
{
/* possible non-ICC src, some profiles, possible non-ICC dst */
bool nonICCSrc, nonICCDst;
ICC_Profile srcProfile, dstProfile;
if (!(srcColorSpace is ICC_ColorSpace))
{
nonICCSrc = true;
srcProfile = ciespace.Profile;
}
else
{
nonICCSrc = false;
srcProfile = ((ICC_ColorSpace)srcColorSpace).Profile;
}
if (!(dstColorSpace is ICC_ColorSpace))
{
nonICCDst = true;
dstProfile = ciespace.Profile;
}
else
{
nonICCDst = false;
dstProfile = ((ICC_ColorSpace)dstColorSpace).Profile;
}
/* make a new transform if needed */
if ((ThisTransform == null) || (ThisSrcProfile != srcProfile) || (ThisDestProfile != dstProfile))
{
UpdateBITransform(srcProfile, dstProfile);
}
// process per scanline
float maxNum = 65535.0f; // use 16-bit precision in CMM
ColorSpace cs;
int iccSrcNumComp;
if (nonICCSrc)
{
cs = ciespace;
iccSrcNumComp = 3;
}
else
{
cs = srcColorSpace;
iccSrcNumComp = srcNumComp;
}
float[] srcMinVal = new float[iccSrcNumComp];
float[] srcInvDiffMinMax = new float[iccSrcNumComp];
for (int i = 0; i < srcNumComp; i++)
{
srcMinVal[i] = cs.GetMinValue(i);
srcInvDiffMinMax[i] = maxNum / (cs.GetMaxValue(i) - srcMinVal[i]);
}
int iccDstNumComp;
if (nonICCDst)
{
cs = ciespace;
iccDstNumComp = 3;
}
else
{
cs = dstColorSpace;
iccDstNumComp = dstNumComp;
}
float[] dstMinVal = new float[iccDstNumComp];
float[] dstDiffMinMax = new float[iccDstNumComp];
for (int i = 0; i < dstNumComp; i++)
{
dstMinVal[i] = cs.GetMinValue(i);
dstDiffMinMax[i] = (cs.GetMaxValue(i) - dstMinVal[i]) / maxNum;
}
float[] dstColor;
if (dstHasAlpha)
{
int size = ((dstNumComp + 1) > 3) ? (dstNumComp + 1) : 3;
dstColor = new float[size];
}
else
{
int size = (dstNumComp > 3) ? dstNumComp : 3;
dstColor = new float[size];
}
short[] srcLine = new short[w * iccSrcNumComp];
short[] dstLine = new short[w * iccDstNumComp];
Object pixel;
float[] color;
float[] alpha = null;
if (needSrcAlpha)
{
alpha = new float[w];
}
int idx;
// process each scanline
for (int y = 0; y < h; y++)
{
// convert src scanline
pixel = null;
color = null;
idx = 0;
for (int x = 0; x < w; x++)
{
pixel = srcRas.GetDataElements(x, y, pixel);
color = srcCM.GetNormalizedComponents(pixel, color, 0);
if (needSrcAlpha)
{
alpha[x] = color[srcNumComp];
}
if (nonICCSrc)
{
color = srcColorSpace.ToCIEXYZ(color);
}
for (int i = 0; i < iccSrcNumComp; i++)
{
srcLine[idx++] = (short)((color[i] - srcMinVal[i]) * srcInvDiffMinMax[i] + 0.5f);
}
}
// color convert srcLine to dstLine
ThisTransform.colorConvert(srcLine, dstLine);
// convert dst scanline
pixel = null;
idx = 0;
for (int x = 0; x < w; x++)
{
for (int i = 0; i < iccDstNumComp; i++)
{
dstColor[i] = ((float)(dstLine[idx++] & 0xffff)) * dstDiffMinMax[i] + dstMinVal[i];
}
if (nonICCDst)
{
color = srcColorSpace.FromCIEXYZ(dstColor);
for (int i = 0; i < dstNumComp; i++)
{
dstColor[i] = color[i];
}
}
if (needSrcAlpha)
{
dstColor[dstNumComp] = alpha[x];
}
else if (dstHasAlpha)
{
dstColor[dstNumComp] = 1.0f;
}
pixel = dstCM.GetDataElements(dstColor, 0, pixel);
dstRas.SetDataElements(x, y, pixel);
}
}
}
else
{
/* possible non-ICC src, possible CSList, possible non-ICC dst */
// process per pixel
int numCS;
if (CSList == null)
{
numCS = 0;
}
else
{
numCS = CSList.Length;
}
float[] dstColor;
if (dstHasAlpha)
{
dstColor = new float[dstNumComp + 1];
}
else
{
dstColor = new float[dstNumComp];
}
Object spixel = null;
Object dpixel = null;
float[] color = null;
float[] tmpColor;
// process each pixel
for (int y = 0; y < h; y++)
{
for (int x = 0; x < w; x++)
{
spixel = srcRas.GetDataElements(x, y, spixel);
color = srcCM.GetNormalizedComponents(spixel, color, 0);
tmpColor = srcColorSpace.ToCIEXYZ(color);
for (int i = 0; i < numCS; i++)
{
tmpColor = CSList[i].FromCIEXYZ(tmpColor);
tmpColor = CSList[i].ToCIEXYZ(tmpColor);
}
tmpColor = dstColorSpace.FromCIEXYZ(tmpColor);
for (int i = 0; i < dstNumComp; i++)
{
dstColor[i] = tmpColor[i];
}
if (needSrcAlpha)
{
dstColor[dstNumComp] = color[srcNumComp];
}
else if (dstHasAlpha)
{
dstColor[dstNumComp] = 1.0f;
}
dpixel = dstCM.GetDataElements(dstColor, 0, dpixel);
dstRas.SetDataElements(x, y, dpixel);
}
}
}
return(dst);
}
/// <summary>
/// Rescales the source BufferedImage.
/// If the color model in the source image is not the same as that
/// in the destination image, the pixels will be converted
/// in the destination. If the destination image is null,
/// a BufferedImage will be created with the source ColorModel.
/// An IllegalArgumentException may be thrown if the number of
/// scaling factors/offsets in this object does not meet the
/// restrictions stated in the class comments above, or if the
/// source image has an IndexColorModel. </summary>
/// <param name="src"> the <code>BufferedImage</code> to be filtered </param>
/// <param name="dst"> the destination for the filtering operation
/// or <code>null</code> </param>
/// <returns> the filtered <code>BufferedImage</code>. </returns>
/// <exception cref="IllegalArgumentException"> if the <code>ColorModel</code>
/// of <code>src</code> is an <code>IndexColorModel</code>,
/// or if the number of scaling factors and offsets in this
/// <code>RescaleOp</code> do not meet the requirements
/// stated in the class comments. </exception>
public BufferedImage Filter(BufferedImage src, BufferedImage dst)
{
ColorModel srcCM = src.ColorModel;
ColorModel dstCM;
int numBands = srcCM.NumColorComponents;
if (srcCM is IndexColorModel)
{
throw new IllegalArgumentException("Rescaling cannot be " + "performed on an indexed image");
}
if (Length != 1 && Length != numBands && Length != srcCM.NumComponents)
{
throw new IllegalArgumentException("Number of scaling constants " + "does not equal the number of" + " of color or color/alpha " + " components");
}
bool needToConvert = false;
// Include alpha
if (Length > numBands && srcCM.HasAlpha())
{
Length = numBands + 1;
}
int width = src.Width;
int height = src.Height;
if (dst == null)
{
dst = CreateCompatibleDestImage(src, null);
dstCM = srcCM;
}
else
{
if (width != dst.Width)
{
throw new IllegalArgumentException("Src width (" + width + ") not equal to dst width (" + dst.Width + ")");
}
if (height != dst.Height)
{
throw new IllegalArgumentException("Src height (" + height + ") not equal to dst height (" + dst.Height + ")");
}
dstCM = dst.ColorModel;
if (srcCM.ColorSpace.Type != dstCM.ColorSpace.Type)
{
needToConvert = true;
dst = CreateCompatibleDestImage(src, null);
}
}
BufferedImage origDst = dst;
//
// Try to use a native BI rescale operation first
//
if (ImagingLib.filter(this, src, dst) == null)
{
//
// Native BI rescale failed - convert to rasters
//
WritableRaster srcRaster = src.Raster;
WritableRaster dstRaster = dst.Raster;
if (srcCM.HasAlpha())
{
if (numBands - 1 == Length || Length == 1)
{
int minx = srcRaster.MinX;
int miny = srcRaster.MinY;
int[] bands = new int[numBands - 1];
for (int i = 0; i < numBands - 1; i++)
{
bands[i] = i;
}
srcRaster = srcRaster.CreateWritableChild(minx, miny, srcRaster.Width, srcRaster.Height, minx, miny, bands);
}
}
if (dstCM.HasAlpha())
{
int dstNumBands = dstRaster.NumBands;
if (dstNumBands - 1 == Length || Length == 1)
{
int minx = dstRaster.MinX;
int miny = dstRaster.MinY;
int[] bands = new int[numBands - 1];
for (int i = 0; i < numBands - 1; i++)
{
bands[i] = i;
}
dstRaster = dstRaster.CreateWritableChild(minx, miny, dstRaster.Width, dstRaster.Height, minx, miny, bands);
}
}
//
// Call the raster filter method
//
Filter(srcRaster, dstRaster);
}
if (needToConvert)
{
// ColorModels are not the same
ColorConvertOp ccop = new ColorConvertOp(Hints);
ccop.Filter(dst, origDst);
}
return(origDst);
}
