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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
---|---|---|
committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/awt/color | |
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diff --git a/libjava/classpath/gnu/java/awt/color/CieXyzConverter.java b/libjava/classpath/gnu/java/awt/color/CieXyzConverter.java new file mode 100644 index 000000000..e1b548e98 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/CieXyzConverter.java @@ -0,0 +1,73 @@ +/* CieXyzConverter.java -- CieXyz conversion class + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + + +/** + * CieXyzConverter - converts to/from a D50-relative CIE XYZ color space. + * + * The sRGB<->CIE XYZ conversions in SrgbConverter are used. + * + * @author Sven de Marothy + */ +public class CieXyzConverter implements ColorSpaceConverter +{ + public float[] toCIEXYZ(float[] in) + { + float[] out = new float[3]; + System.arraycopy(in, 0, out, 0, 3); + return out; + } + + public float[] fromCIEXYZ(float[] in) + { + float[] out = new float[3]; + System.arraycopy(in, 0, out, 0, 3); + return out; + } + + public float[] toRGB(float[] in) + { + return SrgbConverter.XYZtoRGB(in); + } + + public float[] fromRGB(float[] in) + { + return SrgbConverter.RGBtoXYZ(in); + } +} diff --git a/libjava/classpath/gnu/java/awt/color/ClutProfileConverter.java b/libjava/classpath/gnu/java/awt/color/ClutProfileConverter.java new file mode 100644 index 000000000..5229ce804 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/ClutProfileConverter.java @@ -0,0 +1,152 @@ +/* ClutProfileConverter.java -- Conversion routines for CLUT-Based profiles + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + +import java.awt.color.ICC_Profile; + + +/** + * ClutProfileConverter - conversions through a CLUT-based profile + * + * @author Sven de Marothy + */ +public class ClutProfileConverter implements ColorSpaceConverter +{ + private ColorLookUpTable toPCS; + private ColorLookUpTable fromPCS; + private int nChannels; + + public ClutProfileConverter(ICC_Profile profile) + { + nChannels = profile.getNumComponents(); + + // Sun does not specifiy which rendering intent should be used, + // neither does the ICC v2 spec really. + // Try intent 0 + try + { + toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB0Tag); + } + catch (Exception e) + { + toPCS = null; + } + + try + { + fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA0Tag); + } + catch (Exception e) + { + fromPCS = null; + } + + if (toPCS != null || fromPCS != null) + return; + + // If no intent 0 clut is available, look for a intent 1 clut. + try + { + toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB1Tag); + } + catch (Exception e) + { + toPCS = null; + } + + try + { + fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA1Tag); + } + catch (Exception e) + { + fromPCS = null; + } + + if (toPCS != null || fromPCS != null) + return; + + // Last shot.. intent 2 CLUT. + try + { + toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB2Tag); + } + catch (Exception e) + { + toPCS = null; + } + + try + { + fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA2Tag); + } + catch (Exception e) + { + fromPCS = null; + } + + if (toPCS == null && fromPCS == null) + throw new IllegalArgumentException("No CLUTs in profile!"); + } + + public float[] toCIEXYZ(float[] in) + { + if (toPCS != null) + return toPCS.lookup(in); + else + return new float[3]; + } + + public float[] toRGB(float[] in) + { + return SrgbConverter.XYZtoRGB(toCIEXYZ(in)); + } + + public float[] fromCIEXYZ(float[] in) + { + if (fromPCS != null) + return fromPCS.lookup(in); + else + return new float[nChannels]; + } + + public float[] fromRGB(float[] in) + { + return fromCIEXYZ(SrgbConverter.RGBtoXYZ(in)); + } +} diff --git a/libjava/classpath/gnu/java/awt/color/ColorLookUpTable.java b/libjava/classpath/gnu/java/awt/color/ColorLookUpTable.java new file mode 100644 index 000000000..581320c3e --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/ColorLookUpTable.java @@ -0,0 +1,429 @@ +/* ColorLookUpTable.java -- ICC v2 CLUT + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + +import java.awt.color.ColorSpace; +import java.awt.color.ICC_Profile; +import java.nio.ByteBuffer; + + +/** + * ColorLookUpTable handles color lookups through a color lookup table, + * as defined in the ICC specification. + * Both 'mft2' and 'mft1' (8 and 16-bit) type CLUTs are handled. + * + * This will have to be updated later for ICC 4.0.0 + * + * @author Sven de Marothy + */ +public class ColorLookUpTable +{ + /** + * CIE 1931 D50 white point (in Lab coordinates) + */ + private static float[] D50 = { 0.96422f, 1.00f, 0.82521f }; + + /** + * Number of input/output channels + */ + int nIn; + + /** + * Number of input/output channels + */ + int nOut; + int nInTableEntries; // Number of input table entries + int nOutTableEntries; // Number of output table entries + int gridpoints; // Number of gridpoints + int nClut; // This is nOut*(gridpoints**nIn) + double[][] inTable; // 1D input table ([channel][table]) + short[][] outTable; // 1D input table ([channel][table]) + double[] clut; // The color lookup table + float[][] inMatrix; // input matrix (XYZ only) + boolean useMatrix; // Whether to use the matrix or not. + int[] multiplier; + int[] offsets; // Hypercube offsets + boolean inputLab; // Set if the CLUT input CS is Lab + boolean outputLab; // Set if the CLUT output CS is Lab + + /** + * Constructor + * Requires a profile file to get the CLUT from and the tag of the + * CLUT to create. (icSigXToYZTag where X,Y = [A | B], Z = [0,1,2]) + */ + public ColorLookUpTable(ICC_Profile profile, int tag) + { + useMatrix = false; + + switch (tag) + { + case ICC_Profile.icSigAToB0Tag: + case ICC_Profile.icSigAToB1Tag: + case ICC_Profile.icSigAToB2Tag: + if (profile.getColorSpaceType() == ColorSpace.TYPE_XYZ) + useMatrix = true; + inputLab = false; + outputLab = (profile.getPCSType() == ColorSpace.TYPE_Lab); + break; + case ICC_Profile.icSigBToA0Tag: + case ICC_Profile.icSigBToA1Tag: + case ICC_Profile.icSigBToA2Tag: + if (profile.getPCSType() == ColorSpace.TYPE_XYZ) + useMatrix = true; + inputLab = (profile.getPCSType() == ColorSpace.TYPE_Lab); + outputLab = false; + break; + default: + throw new IllegalArgumentException("Not a clut-type tag."); + } + + byte[] data = profile.getData(tag); + if (data == null) + throw new IllegalArgumentException("Unsuitable profile, does not contain a CLUT."); + + // check 'mft' + if (data[0] != 0x6d || data[1] != 0x66 || data[2] != 0x74) + throw new IllegalArgumentException("Unsuitable profile, invalid CLUT data."); + + if (data[3] == 0x32) + readClut16(data); + else if (data[3] == 0x31) + readClut8(data); + else + throw new IllegalArgumentException("Unknown/invalid CLUT type."); + } + + /** + * Loads a 16-bit CLUT into our data structures + */ + private void readClut16(byte[] data) + { + ByteBuffer buf = ByteBuffer.wrap(data); + + nIn = data[8] & (0xFF); + nOut = data[9] & (0xFF); + nInTableEntries = buf.getShort(48); + nOutTableEntries = buf.getShort(50); + gridpoints = data[10] & (0xFF); + + inMatrix = new float[3][3]; + for (int i = 0; i < 3; i++) + for (int j = 0; j < 3; j++) + inMatrix[i][j] = ((float) (buf.getInt(12 + (i * 3 + j) * 4))) / 65536.0f; + + inTable = new double[nIn][nInTableEntries]; + for (int channel = 0; channel < nIn; channel++) + for (int i = 0; i < nInTableEntries; i++) + inTable[channel][i] = (double) ((int) buf.getShort(52 + + (channel * nInTableEntries + + i) * 2) + & (0xFFFF)) / 65536.0; + + nClut = nOut; + multiplier = new int[nIn]; + multiplier[nIn - 1] = nOut; + for (int i = 0; i < nIn; i++) + { + nClut *= gridpoints; + if (i > 0) + multiplier[nIn - i - 1] = multiplier[nIn - i] * gridpoints; + } + + int clutOffset = 52 + nIn * nInTableEntries * 2; + clut = new double[nClut]; + for (int i = 0; i < nClut; i++) + clut[i] = (double) ((int) buf.getShort(clutOffset + i * 2) & (0xFFFF)) / 65536.0; + + outTable = new short[nOut][nOutTableEntries]; + for (int channel = 0; channel < nOut; channel++) + for (int i = 0; i < nOutTableEntries; i++) + outTable[channel][i] = buf.getShort(clutOffset + + (nClut + + channel * nOutTableEntries + i) * 2); + + // calculate the hypercube corner offsets + offsets = new int[(1 << nIn)]; + offsets[0] = 0; + for (int j = 0; j < nIn; j++) + { + int factor = 1 << j; + for (int i = 0; i < factor; i++) + offsets[factor + i] = offsets[i] + multiplier[j]; + } + } + + /** + * Loads a 8-bit CLUT into our data structures. + */ + private void readClut8(byte[] data) + { + ByteBuffer buf = ByteBuffer.wrap(data); + + nIn = (data[8] & (0xFF)); + nOut = (data[9] & (0xFF)); + nInTableEntries = 256; // always 256 + nOutTableEntries = 256; // always 256 + gridpoints = (data[10] & (0xFF)); + + inMatrix = new float[3][3]; + for (int i = 0; i < 3; i++) + for (int j = 0; j < 3; j++) + inMatrix[i][j] = ((float) (buf.getInt(12 + (i * 3 + j) * 4))) / 65536.0f; + + inTable = new double[nIn][nInTableEntries]; + for (int channel = 0; channel < nIn; channel++) + for (int i = 0; i < nInTableEntries; i++) + inTable[channel][i] = (double) ((int) buf.get(48 + + (channel * nInTableEntries + + i)) & (0xFF)) / 255.0; + + nClut = nOut; + multiplier = new int[nIn]; + multiplier[nIn - 1] = nOut; + for (int i = 0; i < nIn; i++) + { + nClut *= gridpoints; + if (i > 0) + multiplier[nIn - i - 1] = multiplier[nIn - i] * gridpoints; + } + + int clutOffset = 48 + nIn * nInTableEntries; + clut = new double[nClut]; + for (int i = 0; i < nClut; i++) + clut[i] = (double) ((int) buf.get(clutOffset + i) & (0xFF)) / 255.0; + + outTable = new short[nOut][nOutTableEntries]; + for (int channel = 0; channel < nOut; channel++) + for (int i = 0; i < nOutTableEntries; i++) + outTable[channel][i] = (short) (buf.get(clutOffset + nClut + + channel * nOutTableEntries + + i) * 257); + + // calculate the hypercube corner offsets + offsets = new int[(1 << nIn)]; + offsets[0] = 0; + for (int j = 0; j < nIn; j++) + { + int factor = 1 << j; + for (int i = 0; i < factor; i++) + offsets[factor + i] = offsets[i] + multiplier[j]; + } + } + + /** + * Performs a lookup through the Color LookUp Table. + * If the CLUT tag type is AtoB the conversion will be from the device + * color space to the PCS, BtoA type goes in the opposite direction. + * + * For convenience, the PCS values for input or output will always be + * CIE XYZ (D50), if the actual PCS is Lab, the values will be converted. + * + * N-dimensional linear interpolation is used. + */ + float[] lookup(float[] in) + { + float[] in2 = new float[in.length]; + if (useMatrix) + { + for (int i = 0; i < 3; i++) + in2[i] = in[0] * inMatrix[i][0] + in[1] * inMatrix[i][1] + + in[2] * inMatrix[i][2]; + } + else if (inputLab) + in2 = XYZtoLab(in); + else + System.arraycopy(in, 0, in2, 0, in.length); + + // input table + for (int i = 0; i < nIn; i++) + { + int index = (int) Math.floor(in2[i] * (double) (nInTableEntries - 1)); // floor in + + // clip values. + if (index >= nInTableEntries - 1) + in2[i] = (float) inTable[i][nInTableEntries - 1]; + else if (index < 0) + in2[i] = (float) inTable[i][0]; + else + { + // linear interpolation + double alpha = in2[i] * ((double) nInTableEntries - 1.0) - index; + in2[i] = (float) (inTable[i][index] * (1 - alpha) + + inTable[i][index + 1] * alpha); + } + } + + // CLUT lookup + double[] output2 = new double[nOut]; + double[] weights = new double[(1 << nIn)]; + double[] clutalpha = new double[nIn]; // interpolation values + int offset = 0; // = gp + for (int i = 0; i < nIn; i++) + { + int index = (int) Math.floor(in2[i] * ((double) gridpoints - 1.0)); + double alpha = in2[i] * ((double) gridpoints - 1.0) - (double) index; + + // clip values. + if (index >= gridpoints - 1) + { + index = gridpoints - 1; + alpha = 1.0; + } + else if (index < 0) + index = 0; + clutalpha[i] = alpha; + offset += index * multiplier[i]; + } + + // Calculate interpolation weights + weights[0] = 1.0; + for (int j = 0; j < nIn; j++) + { + int factor = 1 << j; + for (int i = 0; i < factor; i++) + { + weights[factor + i] = weights[i] * clutalpha[j]; + weights[i] *= (1.0 - clutalpha[j]); + } + } + + for (int i = 0; i < nOut; i++) + output2[i] = weights[0] * clut[offset + i]; + + for (int i = 1; i < (1 << nIn); i++) + { + int offset2 = offset + offsets[i]; + for (int f = 0; f < nOut; f++) + output2[f] += weights[i] * clut[offset2 + f]; + } + + // output table + float[] output = new float[nOut]; + for (int i = 0; i < nOut; i++) + { + int index = (int) Math.floor(output2[i] * ((double) nOutTableEntries + - 1.0)); + + // clip values. + if (index >= nOutTableEntries - 1) + output[i] = outTable[i][nOutTableEntries - 1]; + else if (index < 0) + output[i] = outTable[i][0]; + else + { + // linear interpolation + double a = output2[i] * ((double) nOutTableEntries - 1.0) + - (double) index; + output[i] = (float) ((double) ((int) outTable[i][index] & (0xFFFF)) * (1 + - a) + + (double) ((int) outTable[i][index + 1] & (0xFFFF)) * a) / 65536f; + } + } + + if (outputLab) + return LabtoXYZ(output); + return output; + } + + /** + * Converts CIE Lab coordinates to (D50) XYZ ones. + */ + private float[] LabtoXYZ(float[] in) + { + // Convert from byte-packed format to a + // more convenient one (actual Lab values) + // (See ICC spec for details) + // factor is 100 * 65536 / 65280 + in[0] = (float) (100.392156862745 * in[0]); + in[1] = (in[1] * 256.0f) - 128.0f; + in[2] = (in[2] * 256.0f) - 128.0f; + + float[] out = new float[3]; + + out[1] = (in[0] + 16.0f) / 116.0f; + out[0] = in[1] / 500.0f + out[1]; + out[2] = out[1] - in[2] / 200.0f; + + for (int i = 0; i < 3; i++) + { + double exp = out[i] * out[i] * out[i]; + if (exp <= 0.008856) + out[i] = (out[i] - 16.0f / 116.0f) / 7.787f; + else + out[i] = (float) exp; + out[i] = D50[i] * out[i]; + } + return out; + } + + /** + * Converts CIE XYZ coordinates to Lab ones. + */ + private float[] XYZtoLab(float[] in) + { + float[] temp = new float[3]; + + for (int i = 0; i < 3; i++) + { + temp[i] = in[i] / D50[i]; + + if (temp[i] <= 0.008856f) + temp[i] = (7.7870689f * temp[i]) + (16f / 116.0f); + else + temp[i] = (float) Math.exp((1.0 / 3.0) * Math.log(temp[i])); + } + + float[] out = new float[3]; + out[0] = (116.0f * temp[1]) - 16f; + out[1] = 500.0f * (temp[0] - temp[1]); + out[2] = 200.0f * (temp[1] - temp[2]); + + // Normalize to packed format + out[0] = (float) (out[0] / 100.392156862745); + out[1] = (out[1] + 128f) / 256f; + out[2] = (out[2] + 128f) / 256f; + for (int i = 0; i < 3; i++) + { + if (out[i] < 0f) + out[i] = 0f; + if (out[i] > 1f) + out[i] = 1f; + } + return out; + } +} diff --git a/libjava/classpath/gnu/java/awt/color/ColorSpaceConverter.java b/libjava/classpath/gnu/java/awt/color/ColorSpaceConverter.java new file mode 100644 index 000000000..63ba08a4f --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/ColorSpaceConverter.java @@ -0,0 +1,69 @@ +/* ColorSpaceConverter.java -- an interface for colorspace conversion + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + + +/** + * ColorSpaceConverter - used by java.awt.color.ICC_ColorSpace + * + * Color space conversion can occur in several ways: + * + * -Directly (for the built in spaces sRGB, linear RGB, gray, CIE XYZ and PYCC + * -ICC_ProfileRGB works through TRC curves and a matrix + * -ICC_ProfileGray works through a single TRC + * -Everything else is done through Color lookup tables. + * + * The different conversion methods are implemented through + * an interface. The built-in colorspaces are implemented directly + * with the relevant conversion equations. + * + * In this way, we hopefully will always use the fastest and most + * accurate method available. + * + * @author Sven de Marothy + */ +public interface ColorSpaceConverter +{ + float[] toCIEXYZ(float[] in); + + float[] fromCIEXYZ(float[] in); + + float[] toRGB(float[] in); + + float[] fromRGB(float[] in); +} diff --git a/libjava/classpath/gnu/java/awt/color/GrayProfileConverter.java b/libjava/classpath/gnu/java/awt/color/GrayProfileConverter.java new file mode 100644 index 000000000..3f95b07d7 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/GrayProfileConverter.java @@ -0,0 +1,137 @@ +/* GrayProfileConverter.java -- Gray profile conversion class + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.awt.color; + +import java.awt.color.ICC_Profile; +import java.awt.color.ICC_ProfileGray; +import java.awt.color.ProfileDataException; + +/** + * GrayProfileConverter - converts Grayscale profiles (ICC_ProfileGray) + * + * This type of profile contains a single tone reproduction curve (TRC). + * Conversion consists of simple TRC lookup. + * + * This implementation is very lazy and does everything applying the TRC and + * utilizing the built-in linear grayscale color space. + * + * @author Sven de Marothy + */ +public class GrayProfileConverter implements ColorSpaceConverter +{ + private GrayScaleConverter gc; + private ToneReproductionCurve trc; + private ColorLookUpTable toPCS; + private ColorLookUpTable fromPCS; + + /** + * Constructs the converter described by an ICC_ProfileGray object + */ + public GrayProfileConverter(ICC_ProfileGray profile) + { + try + { + trc = new ToneReproductionCurve(profile.getGamma()); + } + catch (ProfileDataException e) + { + trc = new ToneReproductionCurve(profile.getTRC()); + } + + // linear grayscale converter + gc = new GrayScaleConverter(); + + // If a CLUT is available, it should be used, and the TRCs ignored. + // Note: A valid profile may only have CLUTs in one direction, and + // TRC:s without useful info, making reverse-transforms impossible. + // In this case the TRC will be used for the reverse-transform with + // unpredictable results. This is in line with the Java specification, + try + { + toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB0Tag); + } + catch (Exception e) + { + toPCS = null; + } + + try + { + fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA0Tag); + } + catch (Exception e) + { + fromPCS = null; + } + } + + public float[] toCIEXYZ(float[] in) + { + if (toPCS != null) + return toPCS.lookup(in); + float[] gray = new float[1]; + gray[0] = trc.lookup(in[0]); + return gc.toCIEXYZ(gray); + } + + public float[] toRGB(float[] in) + { + float[] gray = new float[1]; + gray[0] = trc.lookup(in[0]); + return gc.toRGB(gray); + } + + public float[] fromRGB(float[] in) + { + // get linear grayscale value + float[] gray = gc.fromRGB(in); + gray[0] = trc.reverseLookup(gray[0]); + return gray; + } + + public float[] fromCIEXYZ(float[] in) + { + if (fromPCS != null) + return fromPCS.lookup(in); + + float[] gray = gc.fromCIEXYZ(in); + gray[0] = trc.reverseLookup(gray[0]); + return gray; + } +} diff --git a/libjava/classpath/gnu/java/awt/color/GrayScaleConverter.java b/libjava/classpath/gnu/java/awt/color/GrayScaleConverter.java new file mode 100644 index 000000000..beea9d287 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/GrayScaleConverter.java @@ -0,0 +1,110 @@ +/* GrayScaleConverter.java -- Linear grayscale conversion class + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + + +/** + * Linear Grayscale converter + * + * @author Sven de Marothy + */ +public class GrayScaleConverter implements ColorSpaceConverter +{ + // intensity factors (ITU Rec. BT.709) + double[] coeff = { 0.2125f, 0.7154f, 0.0721f }; + + /** + * CIE 1931 D50 white point (in Lab coordinates) + */ + private static float[] D50 = { 0.96422f, 1.00f, 0.82521f }; + + public float[] toCIEXYZ(float[] in) + { + float g = in[0]; + if (g < 0) + g = 1 + g; + float[] out = { g * D50[0], g * D50[1], g * D50[2] }; // White spot + return out; + } + + public float[] toRGB(float[] in) + { + float[] out = new float[3]; + if (in[0] <= 0.00304f) + out[0] = in[0] * 12.92f; + else + out[0] = 1.055f * ((float) Math.exp((1 / 2.4) * Math.log(in[0]))) + - 0.055f; + out[1] = out[2] = out[0]; + return out; + } + + public float[] fromCIEXYZ(float[] in) + { + float[] temp = new float[3]; + temp[0] = 3.1338f * in[0] - 1.6171f * in[1] - 0.4907f * in[2]; + temp[1] = -0.9785f * in[0] + 1.9160f * in[1] + 0.0334f * in[2]; + temp[2] = 0.0720f * in[0] - 0.2290f * in[1] + 1.4056f * in[2]; + float[] out = new float[1]; + for (int i = 0; i < 3; i++) + out[0] = (float) (temp[i] * coeff[i]); + return out; + } + + public float[] fromRGB(float[] in) + { + float[] out = new float[1]; + + // Convert non-linear RGB coordinates to linear ones, + // numbers from the w3 spec. + out[0] = 0; + for (int i = 0; i < 3; i++) + { + float n = in[i]; + if (n < 0) + n = 0f; + if (n > 1) + n = 1f; + if (n <= 0.03928f) + out[0] += (float) (coeff[i] * n / 12.92); + else + out[0] += (float) (coeff[i] * Math.exp(2.4 * Math.log((n + 0.055) / 1.055))); + } + return out; + } +} diff --git a/libjava/classpath/gnu/java/awt/color/LinearRGBConverter.java b/libjava/classpath/gnu/java/awt/color/LinearRGBConverter.java new file mode 100644 index 000000000..1eaf6479e --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/LinearRGBConverter.java @@ -0,0 +1,152 @@ +/* LinearRGBConverter.java -- conversion to a linear RGB color space + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + + +/** + * LinearRGBConverter - conversion routines for a linear sRGB colorspace + * sRGB is a standard for RGB colorspaces, adopted by the w3c. + * + * The specification is available at: + * http://www.w3.org/Graphics/Color/sRGB.html + * + * @author Sven de Marothy + */ +public class LinearRGBConverter implements ColorSpaceConverter +{ + /** + * linear RGB --> sRGB + * Use the inverse gamma curve + */ + public float[] toRGB(float[] in) + { + float[] out = new float[3]; + for (int i = 0; i < 3; i++) + { + float n = in[i]; + if (n < 0) + n = 0f; + if (n > 1) + n = 1f; + if (n <= 0.00304f) + out[i] = in[0] * 12.92f; + else + out[i] = 1.055f * ((float) Math.exp((1 / 2.4) * Math.log(n))) + - 0.055f; + } + return out; + } + + /** + * sRGB --> linear RGB + * Use the gamma curve (gamma=2.4 in sRGB) + */ + public float[] fromRGB(float[] in) + { + float[] out = new float[3]; + + // Convert non-linear RGB coordinates to linear ones, + // numbers from the w3 spec. + for (int i = 0; i < 3; i++) + { + float n = in[i]; + if (n < 0) + n = 0f; + if (n > 1) + n = 1f; + if (n <= 0.03928f) + out[i] = (float) (n / 12.92); + else + out[i] = (float) (Math.exp(2.4 * Math.log((n + 0.055) / 1.055))); + } + return out; + } + + /** + * Linear RGB --> CIE XYZ (D50 relative) + * This is a simple matrix transform, the matrix (relative D65) + * is given in the sRGB spec. This has been combined with a + * linear Bradford transform for the D65-->D50 mapping, resulting + * in a single matrix which does the whole thing. + * + */ + public float[] fromCIEXYZ(float[] in) + { + /* + * Note: The numbers which were used to calculate this only had four + * digits of accuracy. So don't be fooled by the number of digits here. + * If someone has more accurate source, feel free to update this. + */ + float[] out = new float[3]; + out[0] = (float) (3.13383065124221 * in[0] - 1.61711949411313 * in[1] + - 0.49071914111101 * in[2]); + out[1] = (float) (-0.97847026691142 * in[0] + 1.91597856031996 * in[1] + + 0.03340430640699 * in[2]); + out[2] = (float) (0.07203679486279 * in[0] - 0.22903073553113 * in[1] + + 1.40557835776234 * in[2]); + if (out[0] < 0) + out[0] = 0f; + if (out[1] < 0) + out[1] = 0f; + if (out[2] < 0) + out[2] = 0f; + if (out[0] > 1.0f) + out[0] = 1.0f; + if (out[1] > 1.0f) + out[1] = 1.0f; + if (out[2] > 1.0f) + out[2] = 1.0f; + return out; + } + + /** + * Linear RGB --> CIE XYZ (D50 relative) + * Uses the inverse of the above matrix. + */ + public float[] toCIEXYZ(float[] in) + { + float[] out = new float[3]; + out[0] = (float) (0.43606375022190 * in[0] + 0.38514960146481 * in[1] + + 0.14308641888799 * in[2]); + out[1] = (float) (0.22245089403542 * in[0] + 0.71692584775182 * in[1] + + 0.06062451125578 * in[2]); + out[2] = (float) (0.01389851860679 * in[0] + 0.09707969011198 * in[1] + + 0.71399604572506 * in[2]); + return out; + } +} diff --git a/libjava/classpath/gnu/java/awt/color/ProfileHeader.java b/libjava/classpath/gnu/java/awt/color/ProfileHeader.java new file mode 100644 index 000000000..2a6402dbc --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/ProfileHeader.java @@ -0,0 +1,398 @@ +/* ProfileHeader.java -- Encapsules ICC Profile header data + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + +import java.awt.color.ColorSpace; +import java.awt.color.ICC_Profile; +import java.nio.ByteBuffer; + + +/** + * Header, abstracts and validates the header data. + * + * @author Sven de Marothy + */ +public class ProfileHeader +{ + /** + * Magic identifier (ASCII 'acsp') + */ + private static final int icMagicNumber = 0x61637370; + + /** + * Mapping from ICC Profile signatures to ColorSpace types + */ + private static final int[] csTypeMap = + { + ICC_Profile.icSigXYZData, + ColorSpace.TYPE_XYZ, + ICC_Profile.icSigLabData, + ColorSpace.TYPE_Lab, + ICC_Profile.icSigLuvData, + ColorSpace.TYPE_Luv, + ICC_Profile.icSigYCbCrData, + ColorSpace.TYPE_YCbCr, + ICC_Profile.icSigYxyData, + ColorSpace.TYPE_Yxy, + ICC_Profile.icSigRgbData, + ColorSpace.TYPE_RGB, + ICC_Profile.icSigGrayData, + ColorSpace.TYPE_GRAY, + ICC_Profile.icSigHsvData, + ColorSpace.TYPE_HSV, + ICC_Profile.icSigHlsData, + ColorSpace.TYPE_HLS, + ICC_Profile.icSigCmykData, + ColorSpace.TYPE_CMYK, + ICC_Profile.icSigCmyData, + ColorSpace.TYPE_CMY, + ICC_Profile.icSigSpace2CLR, + ColorSpace.TYPE_2CLR, + ICC_Profile.icSigSpace3CLR, + ColorSpace.TYPE_3CLR, + ICC_Profile.icSigSpace4CLR, + ColorSpace.TYPE_4CLR, + ICC_Profile.icSigSpace5CLR, + ColorSpace.TYPE_5CLR, + ICC_Profile.icSigSpace6CLR, + ColorSpace.TYPE_6CLR, + ICC_Profile.icSigSpace7CLR, + ColorSpace.TYPE_7CLR, + ICC_Profile.icSigSpace8CLR, + ColorSpace.TYPE_8CLR, + ICC_Profile.icSigSpace9CLR, + ColorSpace.TYPE_9CLR, + ICC_Profile.icSigSpaceACLR, + ColorSpace.TYPE_ACLR, + ICC_Profile.icSigSpaceBCLR, + ColorSpace.TYPE_BCLR, + ICC_Profile.icSigSpaceCCLR, + ColorSpace.TYPE_CCLR, + ICC_Profile.icSigSpaceDCLR, + ColorSpace.TYPE_DCLR, + ICC_Profile.icSigSpaceECLR, + ColorSpace.TYPE_ECLR, + ICC_Profile.icSigSpaceFCLR, + ColorSpace.TYPE_FCLR + }; + + /** + * Size of an ICC header (128 bytes) + */ + public static final int HEADERSIZE = 128; + + /** + * Mapping of ICC class signatures to profile class constants + */ + private static final int[] classMap = + { + ICC_Profile.icSigInputClass, + ICC_Profile.CLASS_INPUT, + ICC_Profile.icSigDisplayClass, + ICC_Profile.CLASS_DISPLAY, + ICC_Profile.icSigOutputClass, + ICC_Profile.CLASS_OUTPUT, + ICC_Profile.icSigLinkClass, + ICC_Profile.CLASS_DEVICELINK, + ICC_Profile.icSigColorSpaceClass, + ICC_Profile.CLASS_COLORSPACECONVERSION, + ICC_Profile.icSigAbstractClass, + ICC_Profile.CLASS_ABSTRACT, + ICC_Profile.icSigNamedColorClass, + ICC_Profile.CLASS_NAMEDCOLOR + }; + private int size; + private int cmmId; + + // Major/Minor version, The ICC-1998 spec is major v2 + private int majorVersion; + + // Major/Minor version, The ICC-1998 spec is major v2 + private int minorVersion; + private int profileClass; // profile device class + private int colorSpace; // data color space type + private int profileColorSpace; // profile connection space (PCS) type + private byte[] timestamp; // original creation timestamp + private int platform; // platform signature + private int flags; // flags + private int magic; // magic number. + private int manufacturerSig; // manufacturer sig + private int modelSig; // model sig + private byte[] attributes; // Attributes + private int intent; // rendering intent + private byte[] illuminant; // illuminant info (Coordinates of D50 in the PCS) + private int creatorSig; // Creator sig (same type as manufacturer) + + /** + * Creates a 'default' header for use with our predefined profiles. + * Note the device and profile color spaces are not set. + */ + public ProfileHeader() + { + creatorSig = 0; + intent = 0; + modelSig = manufacturerSig = (int) 0x6E6f6E65; // 'none' + magic = icMagicNumber; + cmmId = 0; + platform = 0; // no preferred platform + timestamp = new byte[8]; + majorVersion = 2; + minorVersion = 0x10; + flags = 0; + + // D50 in XYZ format (encoded) + illuminant = new byte[] + { + (byte) 0x00, (byte) 0x00, (byte) 0xf6, (byte) 0xd6, + (byte) 0x00, (byte) 0x01, (byte) 0x00, (byte) 0x00, + (byte) 0x00, (byte) 0x00, (byte) 0xd3, (byte) 0x2d + }; + attributes = new byte[8]; + profileClass = ICC_Profile.CLASS_DISPLAY; + } + + /** + * Creates a header from profile data. Only the header portion (128 bytes) + * is read, so the array passed need not be the full profile. + */ + public ProfileHeader(byte[] data) + { + ByteBuffer buf = ByteBuffer.wrap(data); + + // Get size (the sign bit shouldn't matter. + // A valid profile can never be +2Gb) + size = buf.getInt(ICC_Profile.icHdrSize); + + // CMM ID + cmmId = buf.getInt(ICC_Profile.icHdrCmmId); + + // Version number + majorVersion = (int) (data[ICC_Profile.icHdrVersion]); + minorVersion = (int) (data[ICC_Profile.icHdrVersion + 1]); + + // Profile/Device class + int classSig = buf.getInt(ICC_Profile.icHdrDeviceClass); + profileClass = -1; + for (int i = 0; i < classMap.length; i += 2) + if (classMap[i] == classSig) + { + profileClass = classMap[i + 1]; + break; + } + + // get the data color space + int csSig = buf.getInt(ICC_Profile.icHdrColorSpace); + colorSpace = -1; + for (int i = 0; i < csTypeMap.length; i += 2) + if (csTypeMap[i] == csSig) + { + colorSpace = csTypeMap[i + 1]; + break; + } + + // get the profile color space (PCS), must be xyz or lab except + // for device-link-class profiles + int pcsSig = buf.getInt(ICC_Profile.icHdrPcs); + profileColorSpace = -1; + if (profileClass != ICC_Profile.CLASS_DEVICELINK) + { + if (pcsSig == ICC_Profile.icSigXYZData) + profileColorSpace = ColorSpace.TYPE_XYZ; + if (pcsSig == ICC_Profile.icSigLabData) + profileColorSpace = ColorSpace.TYPE_Lab; + } + else + { + for (int i = 0; i < csTypeMap.length; i += 2) + if (csTypeMap[i] == pcsSig) + { + profileColorSpace = csTypeMap[i + 1]; + break; + } + } + + // creation timestamp + timestamp = new byte[8]; + System.arraycopy(data, ICC_Profile.icHdrDate, timestamp, 0, 8); + + // magic number + magic = buf.getInt(ICC_Profile.icHdrMagic); + + // platform info + platform = buf.getInt(ICC_Profile.icHdrPlatform); + // get flags + flags = buf.getInt(ICC_Profile.icHdrFlags); + // get manufacturer sign + manufacturerSig = buf.getInt(ICC_Profile.icHdrManufacturer); + // get header model + modelSig = buf.getInt(ICC_Profile.icHdrModel); + // attributes + attributes = new byte[8]; + System.arraycopy(data, ICC_Profile.icHdrAttributes, attributes, 0, 8); + // rendering intent + intent = buf.getInt(ICC_Profile.icHdrRenderingIntent); + // illuminant info + illuminant = new byte[12]; + System.arraycopy(data, ICC_Profile.icHdrIlluminant, illuminant, 0, 12); + // Creator signature + creatorSig = buf.getInt(ICC_Profile.icHdrCreator); + // The rest of the header (Total size: 128 bytes) is unused.. + } + + /** + * Verify that the header is valid + * @param size equals the file size if it is to be verified, -1 otherwise + * @throws IllegalArgumentException if the header is found to be invalid. + */ + public void verifyHeader(int size) throws IllegalArgumentException + { + // verify size + if (size != -1 && this.size != size) + throw new IllegalArgumentException("Invalid profile length:" + size); + + // Check version number + if (majorVersion != 2) + throw new IllegalArgumentException("Wrong major version number:" + + majorVersion); + + // Profile/Device class + if (profileClass == -1) + throw new IllegalArgumentException("Invalid profile/device class"); + + // get the data color space + if (colorSpace == -1) + throw new IllegalArgumentException("Invalid colorspace"); + + // profile color space + if (profileColorSpace == -1) + throw new IllegalArgumentException("Invalid PCS."); + + // check magic number + if (magic != icMagicNumber) + throw new IllegalArgumentException("Invalid magic number!"); + } + + /** + * Creates a header, setting the header file size at the same time. + * @param size the profile file size. + */ + public byte[] getData(int size) + { + byte[] data = new byte[HEADERSIZE]; + ByteBuffer buf = ByteBuffer.wrap(data); + buf.putInt(ICC_Profile.icHdrSize, size); + buf.putInt(ICC_Profile.icHdrCmmId, cmmId); + buf.putShort(ICC_Profile.icHdrVersion, + (short) (majorVersion << 8 | minorVersion)); + for (int i = 1; i < classMap.length; i += 2) + if (profileClass == classMap[i]) + buf.putInt(ICC_Profile.icHdrDeviceClass, classMap[i - 1]); + for (int i = 1; i < csTypeMap.length; i += 2) + if (csTypeMap[i] == colorSpace) + buf.putInt(ICC_Profile.icHdrColorSpace, csTypeMap[i - 1]); + for (int i = 1; i < csTypeMap.length; i += 2) + if (csTypeMap[i] == profileColorSpace) + buf.putInt(ICC_Profile.icHdrPcs, csTypeMap[i - 1]); + + System.arraycopy(timestamp, 0, data, ICC_Profile.icHdrDate, + timestamp.length); + buf.putInt(ICC_Profile.icHdrMagic, icMagicNumber); + buf.putInt(ICC_Profile.icHdrPlatform, platform); + buf.putInt(ICC_Profile.icHdrFlags, flags); + buf.putInt(ICC_Profile.icHdrManufacturer, manufacturerSig); + buf.putInt(ICC_Profile.icHdrModel, modelSig); + System.arraycopy(attributes, 0, data, ICC_Profile.icHdrAttributes, + attributes.length); + buf.putInt(ICC_Profile.icHdrRenderingIntent, intent); + System.arraycopy(illuminant, 0, data, ICC_Profile.icHdrIlluminant, + illuminant.length); + buf.putInt(ICC_Profile.icHdrCreator, creatorSig); + return buf.array(); + } + + public int getSize() + { + return size; + } + + public void setSize(int s) + { + size = s; + } + + public int getMajorVersion() + { + return majorVersion; + } + + public int getMinorVersion() + { + return minorVersion; + } + + public int getProfileClass() + { + return profileClass; + } + + public void setProfileClass(int pc) + { + profileClass = pc; + } + + public int getColorSpace() + { + return colorSpace; + } + + public int getProfileColorSpace() + { + return profileColorSpace; + } + + public void setColorSpace(int cs) + { + colorSpace = cs; + } + + public void setProfileColorSpace(int pcs) + { + profileColorSpace = pcs; + } + +} diff --git a/libjava/classpath/gnu/java/awt/color/PyccConverter.java b/libjava/classpath/gnu/java/awt/color/PyccConverter.java new file mode 100644 index 000000000..77ea28a3e --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/PyccConverter.java @@ -0,0 +1,71 @@ +/* PyccConverter.java -- PhotoYCC conversion class + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + +/** + * PyccConverter - conversion routines for the PhotoYCC colorspace + * + * Also known as PhotoCD YCC, it is an expansion of the conventional + * YCC color space to also include colors with over 100% white. + * + * XXX FIXME: Not yet implemented, implementation pending. + * + * @author Sven de Marothy + */ +public class PyccConverter implements ColorSpaceConverter +{ + public float[] toRGB(float[] in) + { + throw new UnsupportedOperationException(); + } + + public float[] fromRGB(float[] in) + { + throw new UnsupportedOperationException(); + } + + public float[] toCIEXYZ(float[] in) + { + throw new UnsupportedOperationException(); + } + + public float[] fromCIEXYZ(float[] in) + { + throw new UnsupportedOperationException(); + } +} diff --git a/libjava/classpath/gnu/java/awt/color/RgbProfileConverter.java b/libjava/classpath/gnu/java/awt/color/RgbProfileConverter.java new file mode 100644 index 000000000..7623890a4 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/RgbProfileConverter.java @@ -0,0 +1,244 @@ +/* RgbProfileConverter.java -- RGB Profile conversion class + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.awt.color; + +import java.awt.color.ICC_Profile; +import java.awt.color.ICC_ProfileRGB; +import java.awt.color.ProfileDataException; + +/** + * RgbProfileConverter - converts RGB profiles (ICC_ProfileRGB) + * + * This type of profile contains a matrix and three + * tone reproduction curves (TRCs). + * + * Device RGB --> CIE XYZ is done through first multiplying with + * a matrix, then each component is looked-up against it's TRC. + * + * The opposite transform is done using the inverse of the matrix, + * and TRC:s. + * + * @author Sven de Marothy + */ +public class RgbProfileConverter implements ColorSpaceConverter +{ + private float[][] matrix; + private float[][] inv_matrix; + private ToneReproductionCurve rTRC; + private ToneReproductionCurve gTRC; + private ToneReproductionCurve bTRC; + private ColorLookUpTable toPCS; + private ColorLookUpTable fromPCS; + + /** + * CIE 1931 D50 white point (in Lab coordinates) + */ + private static float[] D50 = { 0.96422f, 1.00f, 0.82521f }; + + /** + * Constructs an RgbProfileConverter from a given ICC_ProfileRGB + */ + public RgbProfileConverter(ICC_ProfileRGB profile) + { + toPCS = fromPCS = null; + matrix = profile.getMatrix(); + + // get TRCs + try + { + rTRC = new ToneReproductionCurve(profile.getGamma(ICC_ProfileRGB.REDCOMPONENT)); + } + catch (ProfileDataException e) + { + rTRC = new ToneReproductionCurve(profile.getTRC(ICC_ProfileRGB.REDCOMPONENT)); + } + try + { + gTRC = new ToneReproductionCurve(profile.getGamma(ICC_ProfileRGB.GREENCOMPONENT)); + } + catch (ProfileDataException e) + { + gTRC = new ToneReproductionCurve(profile.getTRC(ICC_ProfileRGB.GREENCOMPONENT)); + } + try + { + bTRC = new ToneReproductionCurve(profile.getGamma(ICC_ProfileRGB.BLUECOMPONENT)); + } + catch (ProfileDataException e) + { + bTRC = new ToneReproductionCurve(profile.getTRC(ICC_ProfileRGB.BLUECOMPONENT)); + } + + // If a CLUT is available, it should be used, and the TRCs ignored. + // Note: A valid profile may only have CLUTs in one direction, and + // TRC:s without useful info, making reverse-transforms impossible. + // In this case the TRC will be used for the reverse-transform with + // unpredictable results. This is in line with the Java specification, + try + { + toPCS = new ColorLookUpTable(profile, ICC_Profile.icSigAToB0Tag); + } + catch (Exception e) + { + toPCS = null; + } + + try + { + fromPCS = new ColorLookUpTable(profile, ICC_Profile.icSigBToA0Tag); + } + catch (Exception e) + { + fromPCS = null; + } + + // Calculate the inverse matrix if no reverse CLUT is available + if(fromPCS == null) + inv_matrix = invertMatrix(matrix); + else + { + // otherwise just set it to an identity matrix + inv_matrix = new float[3][3]; + inv_matrix[0][0] = inv_matrix[1][1] = inv_matrix[2][2] = 1.0f; + } + } + + public float[] toCIEXYZ(float[] in) + { + // CLUT takes precedence + if (toPCS != null) + return toPCS.lookup(in); + + float[] temp = new float[3]; + float[] out = new float[3]; + + // device space --> linear gamma + temp[0] = rTRC.lookup(in[0]); + temp[1] = gTRC.lookup(in[1]); + temp[2] = bTRC.lookup(in[2]); + + // matrix multiplication + out[0] = matrix[0][0] * temp[0] + matrix[0][1] * temp[1] + + matrix[0][2] * temp[2]; + out[1] = matrix[1][0] * temp[0] + matrix[1][1] * temp[1] + + matrix[1][2] * temp[2]; + out[2] = matrix[2][0] * temp[0] + matrix[2][1] * temp[1] + + matrix[2][2] * temp[2]; + + return out; + } + + public float[] toRGB(float[] in) + { + return SrgbConverter.XYZtoRGB(toCIEXYZ(in)); + } + + public float[] fromCIEXYZ(float[] in) + { + if (fromPCS != null) + return fromPCS.lookup(in); + + float[] temp = new float[3]; + float[] out = new float[3]; + + // matrix multiplication + temp[0] = inv_matrix[0][0] * in[0] + inv_matrix[0][1] * in[1] + + inv_matrix[0][2] * in[2]; + temp[1] = inv_matrix[1][0] * in[0] + inv_matrix[1][1] * in[1] + + inv_matrix[1][2] * in[2]; + temp[2] = inv_matrix[2][0] * in[0] + inv_matrix[2][1] * in[1] + + inv_matrix[2][2] * in[2]; + + // device space --> linear gamma + out[0] = rTRC.reverseLookup(temp[0]); + out[1] = gTRC.reverseLookup(temp[1]); + out[2] = bTRC.reverseLookup(temp[2]); + + // FIXME: Sun appears to clip the return values to [0,1] + // I don't believe that is a Good Thing, + // (some colorspaces may allow values outside that range.) + // So we return the actual values here. + return out; + } + + public float[] fromRGB(float[] in) + { + return fromCIEXYZ(SrgbConverter.RGBtoXYZ(in)); + } + + /** + * Inverts a 3x3 matrix, returns the inverse, + * throws an IllegalArgumentException if the matrix is not + * invertible (this shouldn't happen for a valid profile) + */ + private float[][] invertMatrix(float[][] matrix) + { + float[][] out = new float[3][3]; + double determinant = matrix[0][0] * (matrix[1][1] * matrix[2][2] + - matrix[2][1] * matrix[1][2]) + - matrix[0][1] * (matrix[1][0] * matrix[2][2] + - matrix[2][0] * matrix[1][2]) + + matrix[0][2] * (matrix[1][0] * matrix[2][1] + - matrix[2][0] * matrix[1][1]); + + if (determinant == 0.0) + throw new IllegalArgumentException("Can't invert conversion matrix."); + float invdet = (float) (1.0 / determinant); + + out[0][0] = invdet * (matrix[1][1] * matrix[2][2] + - matrix[1][2] * matrix[2][1]); + out[0][1] = invdet * (matrix[0][2] * matrix[2][1] + - matrix[0][1] * matrix[2][2]); + out[0][2] = invdet * (matrix[0][1] * matrix[1][2] + - matrix[0][2] * matrix[1][1]); + out[1][0] = invdet * (matrix[1][2] * matrix[2][0] + - matrix[1][0] * matrix[2][2]); + out[1][1] = invdet * (matrix[0][0] * matrix[2][2] + - matrix[0][2] * matrix[2][0]); + out[1][2] = invdet * (matrix[0][2] * matrix[1][0] + - matrix[0][0] * matrix[1][2]); + out[2][0] = invdet * (matrix[1][0] * matrix[2][1] + - matrix[1][1] * matrix[2][0]); + out[2][1] = invdet * (matrix[0][1] * matrix[2][0] + - matrix[0][0] * matrix[2][1]); + out[2][2] = invdet * (matrix[0][0] * matrix[1][1] + - matrix[0][1] * matrix[1][0]); + return out; + } +} diff --git a/libjava/classpath/gnu/java/awt/color/SrgbConverter.java b/libjava/classpath/gnu/java/awt/color/SrgbConverter.java new file mode 100644 index 000000000..76831c0ea --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/SrgbConverter.java @@ -0,0 +1,152 @@ +/* SrgbConverter.java -- sRGB conversion class + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + + +/** + * SrgbConverter - conversion routines for the sRGB colorspace + * sRGB is a standard for RGB colorspaces, adopted by the w3c. + * + * The specification is available at: + * http://www.w3.org/Graphics/Color/sRGB.html + * + * @author Sven de Marothy + */ +/** + * + * Note the matrix numbers used here are NOT identical to those in the + * w3 spec, as those numbers are CIE XYZ relative a D65 white point. + * The CIE XYZ we use is relative a D50 white point, so therefore a + * linear Bradford transform matrix for D65->D50 mapping has been applied. + * (The ICC documents describe this transform) + * + * Linearized Bradford transform: + * 0.8951 0.2664 -0.1614 + * -0.7502 1.7135 0.0367 + * 0.0389 -0.0685 1.0296 + * + * Inverse: + * 0.9870 -0.1471 0.1600 + * 0.4323 0.5184 0.0493 + * -0.00853 0.0400 0.9685 + */ +public class SrgbConverter implements ColorSpaceConverter +{ + public float[] fromCIEXYZ(float[] in) + { + return XYZtoRGB(in); + } + + public float[] toCIEXYZ(float[] in) + { + return RGBtoXYZ(in); + } + + public float[] toRGB(float[] in) + { + float[] out = new float[3]; + System.arraycopy(in, 0, out, 0, 3); + return out; + } + + public float[] fromRGB(float[] in) + { + float[] out = new float[3]; + System.arraycopy(in, 0, out, 0, 3); + return out; + } + + /** + * CIE XYZ (D50 relative) --> sRGB + * + * Static as it's used by other ColorSpaceConverters to + * convert to sRGB if the color space is defined in XYZ. + */ + public static float[] XYZtoRGB(float[] in) + { + float[] temp = new float[3]; + temp[0] = 3.1338f * in[0] - 1.6171f * in[1] - 0.4907f * in[2]; + temp[1] = -0.9785f * in[0] + 1.9160f * in[1] + 0.0334f * in[2]; + temp[2] = 0.0720f * in[0] - 0.2290f * in[1] + 1.4056f * in[2]; + + float[] out = new float[3]; + for (int i = 0; i < 3; i++) + { + if (temp[i] < 0) + temp[i] = 0.0f; + if (temp[i] > 1) + temp[i] = 1.0f; + if (temp[i] <= 0.00304f) + out[i] = temp[i] * 12.92f; + else + out[i] = 1.055f * ((float) Math.exp((1 / 2.4) * Math.log(temp[i]))) + - 0.055f; + } + return out; + } + + /** + * sRGB --> CIE XYZ (D50 relative) + * + * Static as it's used by other ColorSpaceConverters to + * convert to XYZ if the color space is defined in RGB. + */ + public static float[] RGBtoXYZ(float[] in) + { + float[] temp = new float[3]; + float[] out = new float[3]; + for (int i = 0; i < 3; i++) + if (in[i] <= 0.03928f) + temp[i] = in[i] / 12.92f; + else + temp[i] = (float) Math.exp(2.4 * Math.log((in[i] + 0.055) / 1.055)); + + /* + * Note: The numbers which were used to calculate this only had four + * digits of accuracy. So don't be fooled by the number of digits here. + * If someone has more accurate source, feel free to update this. + */ + out[0] = (float) (0.436063750222 * temp[0] + 0.385149601465 * temp[1] + + 0.143086418888 * temp[2]); + out[1] = (float) (0.222450894035 * temp[0] + 0.71692584775 * temp[1] + + 0.060624511256 * temp[2]); + out[2] = (float) (0.0138985186 * temp[0] + 0.097079690112 * temp[1] + + 0.713996045725 * temp[2]); + return out; + } +} diff --git a/libjava/classpath/gnu/java/awt/color/TagEntry.java b/libjava/classpath/gnu/java/awt/color/TagEntry.java new file mode 100644 index 000000000..a97864683 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/TagEntry.java @@ -0,0 +1,121 @@ +/* TagEntry.java -- A utility class used for storing the tags in ICC_Profile + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + + +/** + * TagEntry - stores a profile tag. + * These are conveniently stored in a hashtable with the tag signature + * as a key. A legal profile can only have one tag with a given sig, + * so we can conveniently ignore collisions. + * + * @author Sven de Marothy + */ +public class TagEntry +{ + // tag table entry size + public static final int entrySize = 12; + private int signature; + private int size; + private int offset; + private byte[] data; + + public TagEntry(int sig, int offset, int size, byte[] data) + { + this.signature = sig; + this.offset = offset; + this.size = size; + this.data = new byte[size]; + System.arraycopy(data, offset, this.data, 0, size); + } + + public TagEntry(int sig, byte[] data) + { + this.signature = sig; + this.size = data.length; + this.data = new byte[size]; + System.arraycopy(data, offset, this.data, 0, size); + } + + public byte[] getData() + { + byte[] d = new byte[size]; + System.arraycopy(this.data, 0, d, 0, size); + return d; + } + + public String hashKey() + { + return tagHashKey(signature); + } + + public String toString() + { + String s = ""; + s = s + (char) ((byte) ((signature >> 24) & 0xFF)); + s = s + (char) ((byte) ((signature >> 16) & 0xFF)); + s = s + (char) ((byte) ((signature >> 8) & 0xFF)); + s = s + (char) ((byte) (signature & 0xFF)); + return s; + } + + public int getSignature() + { + return signature; + } + + public int getSize() + { + return size; + } + + public int getOffset() + { + return offset; + } + + public void setOffset(int offset) + { + this.offset = offset; + } + + public static String tagHashKey(int sig) + { + return "" + sig; + } +} diff --git a/libjava/classpath/gnu/java/awt/color/ToneReproductionCurve.java b/libjava/classpath/gnu/java/awt/color/ToneReproductionCurve.java new file mode 100644 index 000000000..208e16883 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/ToneReproductionCurve.java @@ -0,0 +1,177 @@ +/* ToneReproductionCurve.java -- Representation of an ICC 'curv' type TRC + Copyright (C) 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.color; + + +/** + * ToneReproductionCurve - TRCs are used to describe RGB + * and Grayscale profiles. The TRC is essentially the gamma + * function of the color space. + * + * For example, Apple RGB has a gamma of 1.8, most monitors are ~2.2, + * sRGB is 2.4 with a small linear part near 0. + * Linear spaces are of course 1.0. + * (The exact function is implemented in SrgbConverter) + * + * The ICC specification allows the TRC to be described as a single + * Gamma value, where the function is thus out = in**gamma. + * Alternatively, the gamma function may be represented by a lookup table + * of values, in which case linear interpolation is used. + * + * @author Sven de Marothy + */ +public class ToneReproductionCurve +{ + private float[] trc; + private float gamma; + private float[] reverseTrc; + + /** + * Constructs a TRC from a gamma values + */ + public ToneReproductionCurve(float gamma) + { + trc = null; + reverseTrc = null; + this.gamma = gamma; + } + + /** + * Constructs a TRC from a set of float values + */ + public ToneReproductionCurve(float[] trcValues) + { + trc = new float[trcValues.length]; + System.arraycopy(trcValues, 0, trc, 0, trcValues.length); + setupReverseTrc(); + } + + /** + * Constructs a TRC from a set of short values normalized to + * the 0-65535 range (as in the ICC profile file). + * (Note the values are treated as unsigned) + */ + public ToneReproductionCurve(short[] trcValues) + { + trc = new float[trcValues.length]; + for (int i = 0; i < trcValues.length; i++) + trc[i] = (float) ((int) trcValues[i] & (0xFFFF)) / 65535.0f; + setupReverseTrc(); + } + + /** + * Performs a TRC lookup + */ + public float lookup(float in) + { + float out; + + if (trc == null) + { + if (in == 0f) + return 0.0f; + return (float) Math.exp(gamma * Math.log(in)); + } + else + { + double alpha = in * (trc.length - 1); + int index = (int) Math.floor(alpha); + alpha = alpha - (double) index; + if (index >= trc.length - 1) + return trc[trc.length - 1]; + if (index <= 0) + return trc[0]; + out = (float) (trc[index] * (1.0 - alpha) + trc[index + 1] * alpha); + } + return out; + } + + /** + * Performs an reverse lookup + */ + public float reverseLookup(float in) + { + float out; + + if (trc == null) + { + if (in == 0f) + return 0.0f; + return (float) Math.exp((1.0 / gamma) * Math.log(in)); + } + else + { + double alpha = in * (reverseTrc.length - 1); + int index = (int) Math.floor(alpha); + alpha = alpha - (double) index; + if (index >= reverseTrc.length - 1) + return reverseTrc[reverseTrc.length - 1]; + if (index <= 0) + return reverseTrc[0]; + out = (float) (reverseTrc[index] * (1.0 - alpha) + + reverseTrc[index + 1] * alpha); + } + return out; + } + + /** + * Calculates a reverse-lookup table. + * We use a whopping 10,000 entries.. This is should be more than any + * real-life TRC table (typically around 256-1024) so we won't be losing + * any precision. + * + * This will of course generate completely invalid results if the curve + * is not monotonic and invertable. But what's the alternative? + */ + public void setupReverseTrc() + { + reverseTrc = new float[10000]; + int j = 0; + for (int i = 0; i < 10000; i++) + { + float n = ((float) i) / 10000f; + while (trc[j + 1] < n && j < trc.length - 2) + j++; + + if (j == trc.length - 2) + reverseTrc[i] = trc[trc.length - 1]; + else + reverseTrc[i] = (j + (n - trc[j]) / (trc[j + 1] - trc[j])) / ((float) trc.length); + } + } +} diff --git a/libjava/classpath/gnu/java/awt/color/package.html b/libjava/classpath/gnu/java/awt/color/package.html new file mode 100644 index 000000000..c4705cce5 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/color/package.html @@ -0,0 +1,46 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> +<!-- package.html - describes classes in gnu.java.awt.color package. + Copyright (C) 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. --> + +<html> +<head><title>GNU Classpath - gnu.java.awt.color</title></head> + +<body> +<p></p> + +</body> +</html> |