Android example source code file (Type.java)

This example Android source code file (Type.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

baseobj, builder, class, dimensions, element, entry, field, illegalargumentexception, invalid, reflection, renderscript, string, type, unkown, values

The Type.java Android example source code

/*
 * Copyright (C) 2008 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.reflect.Field;

/**
 * @hide
 *
 **/
public class Type extends BaseObj {
    int mDimX;
    int mDimY;
    int mDimZ;
    boolean mDimLOD;
    boolean mDimFaces;
    int mElementCount;
    Element mElement;

    private int mNativeCache;
    Class mJavaClass;

    public Element getElement() {
        return mElement;
    }

    public int getX() {
        return mDimX;
    }
    public int getY() {
        return mDimY;
    }
    public int getZ() {
        return mDimZ;
    }
    public boolean getLOD() {
        return mDimLOD;
    }
    public boolean getFaces() {
        return mDimFaces;
    }
    public int getElementCount() {
        return mElementCount;
    }

    void calcElementCount() {
        boolean hasLod = getLOD();
        int x = getX();
        int y = getY();
        int z = getZ();
        int faces = 1;
        if(getFaces()) {
            faces = 6;
        }
        if(x == 0) {
            x = 1;
        }
        if(y == 0) {
            y = 1;
        }
        if(z == 0) {
            z = 1;
        }

        int count = x * y * z * faces;
        if(hasLod && (x > 1) && (y > 1) && (z > 1)) {
            if(x > 1) {
                x >>= 1;
            }
            if(y > 1) {
                y >>= 1;
            }
            if(z > 1) {
                z >>= 1;
            }

            count += x * y * z * faces;
        }
        mElementCount = count;
    }


    Type(int id, RenderScript rs) {
        super(rs);
        mID = id;
        mNativeCache = 0;
    }

    protected void finalize() throws Throwable {
        if(mNativeCache != 0) {
            mRS.nTypeFinalDestroy(this);
            mNativeCache = 0;
        }
        super.finalize();
    }

    public static Type createFromClass(RenderScript rs, Class c, int size) {
        Element e = Element.createFromClass(rs, c);
        Builder b = new Builder(rs, e);
        b.add(Dimension.X, size);
        Type t = b.create();
        e.destroy();

        // native fields
        {
            Field[] fields = c.getFields();
            int[] arTypes = new int[fields.length];
            int[] arBits = new int[fields.length];

            for(int ct=0; ct < fields.length; ct++) {
                Field f = fields[ct];
                Class fc = f.getType();
                if(fc == int.class) {
                    arTypes[ct] = Element.DataType.SIGNED_32.mID;
                    arBits[ct] = 32;
                } else if(fc == short.class) {
                    arTypes[ct] = Element.DataType.SIGNED_16.mID;
                    arBits[ct] = 16;
                } else if(fc == byte.class) {
                    arTypes[ct] = Element.DataType.SIGNED_8.mID;
                    arBits[ct] = 8;
                } else if(fc == float.class) {
                    arTypes[ct] = Element.DataType.FLOAT_32.mID;
                    arBits[ct] = 32;
                } else {
                    throw new IllegalArgumentException("Unkown field type");
                }
            }
            rs.nTypeSetupFields(t, arTypes, arBits, fields);
        }
        t.mJavaClass = c;
        return t;
    }

    public static Type createFromClass(RenderScript rs, Class c, int size, String scriptName) {
        Type t = createFromClass(rs, c, size);
        t.setName(scriptName);
        return t;
    }


    public static class Builder {
        RenderScript mRS;
        Entry[] mEntries;
        int mEntryCount;
        Element mElement;

        class Entry {
            Dimension mDim;
            int mValue;
        }

        public Builder(RenderScript rs, Element e) {
            if(e.mID == 0) {
                throw new IllegalArgumentException("Invalid element.");
            }

            mRS = rs;
            mEntries = new Entry[4];
            mElement = e;
        }

        public void add(Dimension d, int value) {
            if(value < 1) {
                throw new IllegalArgumentException("Values of less than 1 for Dimensions are not valid.");
            }
            if(mEntries.length >= mEntryCount) {
                Entry[] en = new Entry[mEntryCount + 8];
                System.arraycopy(mEntries, 0, en, 0, mEntries.length);
                mEntries = en;
            }
            mEntries[mEntryCount] = new Entry();
            mEntries[mEntryCount].mDim = d;
            mEntries[mEntryCount].mValue = value;
            mEntryCount++;
        }

        static synchronized Type internalCreate(RenderScript rs, Builder b) {
            rs.nTypeBegin(b.mElement.mID);
            for (int ct=0; ct < b.mEntryCount; ct++) {
                Entry en = b.mEntries[ct];
                rs.nTypeAdd(en.mDim.mID, en.mValue);
            }
            int id = rs.nTypeCreate();
            return new Type(id, rs);
        }

        public Type create() {
            Type t = internalCreate(mRS, this);
            t.mElement = mElement;

            for(int ct=0; ct < mEntryCount; ct++) {
                if(mEntries[ct].mDim == Dimension.X) {
                    t.mDimX = mEntries[ct].mValue;
                }
                if(mEntries[ct].mDim == Dimension.Y) {
                    t.mDimY = mEntries[ct].mValue;
                }
                if(mEntries[ct].mDim == Dimension.Z) {
                    t.mDimZ = mEntries[ct].mValue;
                }
                if(mEntries[ct].mDim == Dimension.LOD) {
                    t.mDimLOD = mEntries[ct].mValue != 0;
                }
                if(mEntries[ct].mDim == Dimension.FACE) {
                    t.mDimFaces = mEntries[ct].mValue != 0;
                }
            }
            t.calcElementCount();
            return t;
        }
    }

}