diff options
Diffstat (limited to 'src/com/android/gallery3d/filtershow/filters/ColorSpaceMatrix.java')
| -rw-r--r-- | src/com/android/gallery3d/filtershow/filters/ColorSpaceMatrix.java | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/src/com/android/gallery3d/filtershow/filters/ColorSpaceMatrix.java b/src/com/android/gallery3d/filtershow/filters/ColorSpaceMatrix.java deleted file mode 100644 index 7c307a9e7..000000000 --- a/src/com/android/gallery3d/filtershow/filters/ColorSpaceMatrix.java +++ /dev/null @@ -1,225 +0,0 @@ -/* - * Copyright (C) 2012 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package com.android.gallery3d.filtershow.filters; - -import java.util.Arrays; - -public class ColorSpaceMatrix { - private final float[] mMatrix = new float[16]; - private static final float RLUM = 0.3086f; - private static final float GLUM = 0.6094f; - private static final float BLUM = 0.0820f; - - public ColorSpaceMatrix() { - identity(); - } - - /** - * Copy constructor - * - * @param matrix - */ - public ColorSpaceMatrix(ColorSpaceMatrix matrix) { - System.arraycopy(matrix.mMatrix, 0, mMatrix, 0, matrix.mMatrix.length); - } - - /** - * get the matrix - * - * @return the internal matrix - */ - public float[] getMatrix() { - return mMatrix; - } - - /** - * set matrix to identity - */ - public void identity() { - Arrays.fill(mMatrix, 0); - mMatrix[0] = mMatrix[5] = mMatrix[10] = mMatrix[15] = 1; - } - - public void convertToLuminance() { - mMatrix[0] = mMatrix[1] = mMatrix[2] = 0.3086f; - mMatrix[4] = mMatrix[5] = mMatrix[6] = 0.6094f; - mMatrix[8] = mMatrix[9] = mMatrix[10] = 0.0820f; - } - - private void multiply(float[] a) - { - int x, y; - float[] temp = new float[16]; - - for (y = 0; y < 4; y++) { - int y4 = y * 4; - for (x = 0; x < 4; x++) { - temp[y4 + x] = mMatrix[y4 + 0] * a[x] - + mMatrix[y4 + 1] * a[4 + x] - + mMatrix[y4 + 2] * a[8 + x] - + mMatrix[y4 + 3] * a[12 + x]; - } - } - for (int i = 0; i < 16; i++) - mMatrix[i] = temp[i]; - } - - private void xRotateMatrix(float rs, float rc) - { - ColorSpaceMatrix c = new ColorSpaceMatrix(); - float[] tmp = c.mMatrix; - - tmp[5] = rc; - tmp[6] = rs; - tmp[9] = -rs; - tmp[10] = rc; - - multiply(tmp); - } - - private void yRotateMatrix(float rs, float rc) - { - ColorSpaceMatrix c = new ColorSpaceMatrix(); - float[] tmp = c.mMatrix; - - tmp[0] = rc; - tmp[2] = -rs; - tmp[8] = rs; - tmp[10] = rc; - - multiply(tmp); - } - - private void zRotateMatrix(float rs, float rc) - { - ColorSpaceMatrix c = new ColorSpaceMatrix(); - float[] tmp = c.mMatrix; - - tmp[0] = rc; - tmp[1] = rs; - tmp[4] = -rs; - tmp[5] = rc; - multiply(tmp); - } - - private void zShearMatrix(float dx, float dy) - { - ColorSpaceMatrix c = new ColorSpaceMatrix(); - float[] tmp = c.mMatrix; - - tmp[2] = dx; - tmp[6] = dy; - multiply(tmp); - } - - /** - * sets the transform to a shift in Hue - * - * @param rot rotation in degrees - */ - public void setHue(float rot) - { - float mag = (float) Math.sqrt(2.0); - float xrs = 1 / mag; - float xrc = 1 / mag; - xRotateMatrix(xrs, xrc); - mag = (float) Math.sqrt(3.0); - float yrs = -1 / mag; - float yrc = (float) Math.sqrt(2.0) / mag; - yRotateMatrix(yrs, yrc); - - float lx = getRedf(RLUM, GLUM, BLUM); - float ly = getGreenf(RLUM, GLUM, BLUM); - float lz = getBluef(RLUM, GLUM, BLUM); - float zsx = lx / lz; - float zsy = ly / lz; - zShearMatrix(zsx, zsy); - - float zrs = (float) Math.sin(rot * Math.PI / 180.0); - float zrc = (float) Math.cos(rot * Math.PI / 180.0); - zRotateMatrix(zrs, zrc); - zShearMatrix(-zsx, -zsy); - yRotateMatrix(-yrs, yrc); - xRotateMatrix(-xrs, xrc); - } - - /** - * set it to a saturation matrix - * - * @param s - */ - public void changeSaturation(float s) { - mMatrix[0] = (1 - s) * RLUM + s; - mMatrix[1] = (1 - s) * RLUM; - mMatrix[2] = (1 - s) * RLUM; - mMatrix[4] = (1 - s) * GLUM; - mMatrix[5] = (1 - s) * GLUM + s; - mMatrix[6] = (1 - s) * GLUM; - mMatrix[8] = (1 - s) * BLUM; - mMatrix[9] = (1 - s) * BLUM; - mMatrix[10] = (1 - s) * BLUM + s; - } - - /** - * Transform RGB value - * - * @param r red pixel value - * @param g green pixel value - * @param b blue pixel value - * @return computed red pixel value - */ - public float getRed(int r, int g, int b) { - return r * mMatrix[0] + g * mMatrix[4] + b * mMatrix[8] + mMatrix[12]; - } - - /** - * Transform RGB value - * - * @param r red pixel value - * @param g green pixel value - * @param b blue pixel value - * @return computed green pixel value - */ - public float getGreen(int r, int g, int b) { - return r * mMatrix[1] + g * mMatrix[5] + b * mMatrix[9] + mMatrix[13]; - } - - /** - * Transform RGB value - * - * @param r red pixel value - * @param g green pixel value - * @param b blue pixel value - * @return computed blue pixel value - */ - public float getBlue(int r, int g, int b) { - return r * mMatrix[2] + g * mMatrix[6] + b * mMatrix[10] + mMatrix[14]; - } - - private float getRedf(float r, float g, float b) { - return r * mMatrix[0] + g * mMatrix[4] + b * mMatrix[8] + mMatrix[12]; - } - - private float getGreenf(float r, float g, float b) { - return r * mMatrix[1] + g * mMatrix[5] + b * mMatrix[9] + mMatrix[13]; - } - - private float getBluef(float r, float g, float b) { - return r * mMatrix[2] + g * mMatrix[6] + b * mMatrix[10] + mMatrix[14]; - } - -} |