Move RenderScript from graphics/ to new fw/base subdirectory rs.

Change-Id: I30b6633578f063840e1bdbcc9ba513b727912a6d

1 files changed, 493 insertions, 0 deletions

diff --git a/rs/java/android/renderscript/Matrix4f.java b/rs/java/android/renderscript/Matrix4f.java
new file mode 100644
index 0000000..5d5bf5f
--- /dev/null
+++ b/rs/java/android/renderscript/Matrix4f.java
@@ -0,0 +1,493 @@
+/*
+ * Copyright (C) 2009-2012 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 android.renderscript;
+
+import java.lang.Math;
+
+
+/**
+ * Class for exposing the native RenderScript rs_matrix4x4 type back to the Android system.
+ *
+ **/
+public class Matrix4f {
+
+    /**
+    * Creates a new identity 4x4 matrix
+    */
+    public Matrix4f() {
+        mMat = new float[16];
+        loadIdentity();
+    }
+
+    /**
+    * Creates a new matrix and sets its values from the given
+    * parameter
+    *
+    * @param dataArray values to set the matrix to, must be 16
+    *                  floats long
+    */
+    public Matrix4f(float[] dataArray) {
+        mMat = new float[16];
+        System.arraycopy(dataArray, 0, mMat, 0, mMat.length);
+    }
+
+    /**
+    * Return a reference to the internal array representing matrix
+    * values. Modifying this array will also change the matrix
+    *
+    * @return internal array representing the matrix
+    */
+    public float[] getArray() {
+        return mMat;
+    }
+
+    /**
+    * Returns the value for a given row and column
+    *
+    * @param x column of the value to return
+    * @param y row of the value to return
+    *
+    * @return value in the yth row and xth column
+    */
+    public float get(int x, int y) {
+        return mMat[x*4 + y];
+    }
+
+    /**
+    * Sets the value for a given row and column
+    *
+    * @param x column of the value to set
+    * @param y row of the value to set
+    */
+    public void set(int x, int y, float v) {
+        mMat[x*4 + y] = v;
+    }
+
+    /**
+    * Sets the matrix values to identity
+    */
+    public void loadIdentity() {
+        mMat[0] = 1;
+        mMat[1] = 0;
+        mMat[2] = 0;
+        mMat[3] = 0;
+
+        mMat[4] = 0;
+        mMat[5] = 1;
+        mMat[6] = 0;
+        mMat[7] = 0;
+
+        mMat[8] = 0;
+        mMat[9] = 0;
+        mMat[10] = 1;
+        mMat[11] = 0;
+
+        mMat[12] = 0;
+        mMat[13] = 0;
+        mMat[14] = 0;
+        mMat[15] = 1;
+    }
+
+    /**
+    * Sets the values of the matrix to those of the parameter
+    *
+    * @param src matrix to load the values from
+    */
+    public void load(Matrix4f src) {
+        System.arraycopy(src.getArray(), 0, mMat, 0, mMat.length);
+    }
+
+    /**
+    * Sets the values of the matrix to those of the parameter
+    *
+    * @param src matrix to load the values from
+    * @hide
+    */
+    public void load(Matrix3f src) {
+        mMat[0] = src.mMat[0];
+        mMat[1] = src.mMat[1];
+        mMat[2] = src.mMat[2];
+        mMat[3] = 0;
+
+        mMat[4] = src.mMat[3];
+        mMat[5] = src.mMat[4];
+        mMat[6] = src.mMat[5];
+        mMat[7] = 0;
+
+        mMat[8] = src.mMat[6];
+        mMat[9] = src.mMat[7];
+        mMat[10] = src.mMat[8];
+        mMat[11] = 0;
+
+        mMat[12] = 0;
+        mMat[13] = 0;
+        mMat[14] = 0;
+        mMat[15] = 1;
+    }
+
+    /**
+    * Sets current values to be a rotation matrix of certain angle
+    * about a given axis
+    *
+    * @param rot angle of rotation
+    * @param x rotation axis x
+    * @param y rotation axis y
+    * @param z rotation axis z
+    */
+    public void loadRotate(float rot, float x, float y, float z) {
+        float c, s;
+        mMat[3] = 0;
+        mMat[7] = 0;
+        mMat[11]= 0;
+        mMat[12]= 0;
+        mMat[13]= 0;
+        mMat[14]= 0;
+        mMat[15]= 1;
+        rot *= (float)(java.lang.Math.PI / 180.0f);
+        c = (float)java.lang.Math.cos(rot);
+        s = (float)java.lang.Math.sin(rot);
+
+        float len = (float)java.lang.Math.sqrt(x*x + y*y + z*z);
+        if (!(len != 1)) {
+            float recipLen = 1.f / len;
+            x *= recipLen;
+            y *= recipLen;
+            z *= recipLen;
+        }
+        float nc = 1.0f - c;
+        float xy = x * y;
+        float yz = y * z;
+        float zx = z * x;
+        float xs = x * s;
+        float ys = y * s;
+        float zs = z * s;
+        mMat[ 0] = x*x*nc +  c;
+        mMat[ 4] =  xy*nc - zs;
+        mMat[ 8] =  zx*nc + ys;
+        mMat[ 1] =  xy*nc + zs;
+        mMat[ 5] = y*y*nc +  c;
+        mMat[ 9] =  yz*nc - xs;
+        mMat[ 2] =  zx*nc - ys;
+        mMat[ 6] =  yz*nc + xs;
+        mMat[10] = z*z*nc +  c;
+    }
+
+    /**
+    * Sets current values to be a scale matrix of given dimensions
+    *
+    * @param x scale component x
+    * @param y scale component y
+    * @param z scale component z
+    */
+    public void loadScale(float x, float y, float z) {
+        loadIdentity();
+        mMat[0] = x;
+        mMat[5] = y;
+        mMat[10] = z;
+    }
+
+    /**
+    * Sets current values to be a translation matrix of given
+    * dimensions
+    *
+    * @param x translation component x
+    * @param y translation component y
+    * @param z translation component z
+    */
+    public void loadTranslate(float x, float y, float z) {
+        loadIdentity();
+        mMat[12] = x;
+        mMat[13] = y;
+        mMat[14] = z;
+    }
+
+    /**
+    * Sets current values to be the result of multiplying two given
+    * matrices
+    *
+    * @param lhs left hand side matrix
+    * @param rhs right hand side matrix
+    */
+    public void loadMultiply(Matrix4f lhs, Matrix4f rhs) {
+        for (int i=0 ; i<4 ; i++) {
+            float ri0 = 0;
+            float ri1 = 0;
+            float ri2 = 0;
+            float ri3 = 0;
+            for (int j=0 ; j<4 ; j++) {
+                float rhs_ij = rhs.get(i,j);
+                ri0 += lhs.get(j,0) * rhs_ij;
+                ri1 += lhs.get(j,1) * rhs_ij;
+                ri2 += lhs.get(j,2) * rhs_ij;
+                ri3 += lhs.get(j,3) * rhs_ij;
+            }
+            set(i,0, ri0);
+            set(i,1, ri1);
+            set(i,2, ri2);
+            set(i,3, ri3);
+        }
+    }
+
+    /**
+    * Set current values to be an orthographic projection matrix
+    *
+    * @param l location of the left vertical clipping plane
+    * @param r location of the right vertical clipping plane
+    * @param b location of the bottom horizontal clipping plane
+    * @param t location of the top horizontal clipping plane
+    * @param n location of the near clipping plane
+    * @param f location of the far clipping plane
+    */
+    public void loadOrtho(float l, float r, float b, float t, float n, float f) {
+        loadIdentity();
+        mMat[0] = 2 / (r - l);
+        mMat[5] = 2 / (t - b);
+        mMat[10]= -2 / (f - n);
+        mMat[12]= -(r + l) / (r - l);
+        mMat[13]= -(t + b) / (t - b);
+        mMat[14]= -(f + n) / (f - n);
+    }
+
+    /**
+    * Set current values to be an orthographic projection matrix
+    * with the right and bottom clipping planes set to the given
+    * values. Left and top clipping planes are set to 0. Near and
+    * far are set to -1, 1 respectively
+    *
+    * @param w location of the right vertical clipping plane
+    * @param h location of the bottom horizontal clipping plane
+    *
+    */
+    public void loadOrthoWindow(int w, int h) {
+        loadOrtho(0,w, h,0, -1,1);
+    }
+
+    /**
+    * Sets current values to be a perspective projection matrix
+    *
+    * @param l location of the left vertical clipping plane
+    * @param r location of the right vertical clipping plane
+    * @param b location of the bottom horizontal clipping plane
+    * @param t location of the top horizontal clipping plane
+    * @param n location of the near clipping plane, must be positive
+    * @param f location of the far clipping plane, must be positive
+    *
+    */
+    public void loadFrustum(float l, float r, float b, float t, float n, float f) {
+        loadIdentity();
+        mMat[0] = 2 * n / (r - l);
+        mMat[5] = 2 * n / (t - b);
+        mMat[8] = (r + l) / (r - l);
+        mMat[9] = (t + b) / (t - b);
+        mMat[10]= -(f + n) / (f - n);
+        mMat[11]= -1;
+        mMat[14]= -2*f*n / (f - n);
+        mMat[15]= 0;
+    }
+
+    /**
+    * Sets current values to be a perspective projection matrix
+    *
+    * @param fovy vertical field of view angle in degrees
+    * @param aspect aspect ratio of the screen
+    * @param near near cliping plane, must be positive
+    * @param far far clipping plane, must be positive
+    */
+    public void loadPerspective(float fovy, float aspect, float near, float far) {
+        float top = near * (float)Math.tan((float) (fovy * Math.PI / 360.0f));
+        float bottom = -top;
+        float left = bottom * aspect;
+        float right = top * aspect;
+        loadFrustum(left, right, bottom, top, near, far);
+    }
+
+    /**
+    * Helper function to set the current values to a perspective
+    * projection matrix with aspect ratio defined by the parameters
+    * and (near, far), (bottom, top) mapping to (-1, 1) at z = 0
+    *
+    * @param w screen width
+    * @param h screen height
+    */
+    public void loadProjectionNormalized(int w, int h) {
+        // range -1,1 in the narrow axis at z = 0.
+        Matrix4f m1 = new Matrix4f();
+        Matrix4f m2 = new Matrix4f();
+
+        if(w > h) {
+            float aspect = ((float)w) / h;
+            m1.loadFrustum(-aspect,aspect,  -1,1,  1,100);
+        } else {
+            float aspect = ((float)h) / w;
+            m1.loadFrustum(-1,1, -aspect,aspect, 1,100);
+        }
+
+        m2.loadRotate(180, 0, 1, 0);
+        m1.loadMultiply(m1, m2);
+
+        m2.loadScale(-2, 2, 1);
+        m1.loadMultiply(m1, m2);
+
+        m2.loadTranslate(0, 0, 2);
+        m1.loadMultiply(m1, m2);
+
+        load(m1);
+    }
+
+    /**
+    * Post-multiplies the current matrix by a given parameter
+    *
+    * @param rhs right hand side to multiply by
+    */
+    public void multiply(Matrix4f rhs) {
+        Matrix4f tmp = new Matrix4f();
+        tmp.loadMultiply(this, rhs);
+        load(tmp);
+    }
+    /**
+    * Modifies the current matrix by post-multiplying it with a
+    * rotation matrix of certain angle about a given axis
+    *
+    * @param rot angle of rotation
+    * @param x rotation axis x
+    * @param y rotation axis y
+    * @param z rotation axis z
+    */
+    public void rotate(float rot, float x, float y, float z) {
+        Matrix4f tmp = new Matrix4f();
+        tmp.loadRotate(rot, x, y, z);
+        multiply(tmp);
+    }
+
+    /**
+    * Modifies the current matrix by post-multiplying it with a
+    * scale matrix of given dimensions
+    *
+    * @param x scale component x
+    * @param y scale component y
+    * @param z scale component z
+    */
+    public void scale(float x, float y, float z) {
+        Matrix4f tmp = new Matrix4f();
+        tmp.loadScale(x, y, z);
+        multiply(tmp);
+    }
+
+    /**
+    * Modifies the current matrix by post-multiplying it with a
+    * translation matrix of given dimensions
+    *
+    * @param x translation component x
+    * @param y translation component y
+    * @param z translation component z
+    */
+    public void translate(float x, float y, float z) {
+        Matrix4f tmp = new Matrix4f();
+        tmp.loadTranslate(x, y, z);
+        multiply(tmp);
+    }
+    private float computeCofactor(int i, int j) {
+        int c0 = (i+1) % 4;
+        int c1 = (i+2) % 4;
+        int c2 = (i+3) % 4;
+        int r0 = (j+1) % 4;
+        int r1 = (j+2) % 4;
+        int r2 = (j+3) % 4;
+
+        float minor = (mMat[c0 + 4*r0] * (mMat[c1 + 4*r1] * mMat[c2 + 4*r2] -
+                                            mMat[c1 + 4*r2] * mMat[c2 + 4*r1]))
+                     - (mMat[c0 + 4*r1] * (mMat[c1 + 4*r0] * mMat[c2 + 4*r2] -
+                                            mMat[c1 + 4*r2] * mMat[c2 + 4*r0]))
+                     + (mMat[c0 + 4*r2] * (mMat[c1 + 4*r0] * mMat[c2 + 4*r1] -
+                                            mMat[c1 + 4*r1] * mMat[c2 + 4*r0]));
+
+        float cofactor = ((i+j) & 1) != 0 ? -minor : minor;
+        return cofactor;
+    }
+
+    /**
+    * Sets the current matrix to its inverse
+    */
+    public boolean inverse() {
+
+        Matrix4f result = new Matrix4f();
+
+        for (int i = 0; i < 4; ++i) {
+            for (int j = 0; j < 4; ++j) {
+                result.mMat[4*i + j] = computeCofactor(i, j);
+            }
+        }
+
+        // Dot product of 0th column of source and 0th row of result
+        float det = mMat[0]*result.mMat[0] + mMat[4]*result.mMat[1] +
+                     mMat[8]*result.mMat[2] + mMat[12]*result.mMat[3];
+
+        if (Math.abs(det) < 1e-6) {
+            return false;
+        }
+
+        det = 1.0f / det;
+        for (int i = 0; i < 16; ++i) {
+            mMat[i] = result.mMat[i] * det;
+        }
+
+        return true;
+    }
+
+    /**
+    * Sets the current matrix to its inverse transpose
+    */
+    public boolean inverseTranspose() {
+
+        Matrix4f result = new Matrix4f();
+
+        for (int i = 0; i < 4; ++i) {
+            for (int j = 0; j < 4; ++j) {
+                result.mMat[4*j + i] = computeCofactor(i, j);
+            }
+        }
+
+        float det = mMat[0]*result.mMat[0] + mMat[4]*result.mMat[4] +
+                     mMat[8]*result.mMat[8] + mMat[12]*result.mMat[12];
+
+        if (Math.abs(det) < 1e-6) {
+            return false;
+        }
+
+        det = 1.0f / det;
+        for (int i = 0; i < 16; ++i) {
+            mMat[i] = result.mMat[i] * det;
+        }
+
+        return true;
+    }
+
+    /**
+    * Sets the current matrix to its transpose
+    */
+    public void transpose() {
+        for(int i = 0; i < 3; ++i) {
+            for(int j = i + 1; j < 4; ++j) {
+                float temp = mMat[i*4 + j];
+                mMat[i*4 + j] = mMat[j*4 + i];
+                mMat[j*4 + i] = temp;
+            }
+        }
+    }
+
+    final float[] mMat;
+}