1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.scenegraph;
18
19import java.lang.Math;
20import java.util.ArrayList;
21import java.util.HashMap;
22
23import com.android.scenegraph.SceneManager;
24import com.android.scenegraph.Transform;
25
26import android.renderscript.Element;
27import android.renderscript.Matrix4f;
28import android.renderscript.ProgramFragment;
29import android.renderscript.ProgramStore;
30import android.renderscript.ProgramVertex;
31import android.renderscript.RenderScriptGL;
32import android.util.Log;
33
34/**
35 * @hide
36 */
37public abstract class ShaderParam extends SceneGraphBase {
38
39    static final String cameraPos        = "cameraPos";
40    static final String cameraDir        = "cameraDir";
41
42    static final String lightColor       = "lightColor";
43    static final String lightPos         = "lightPos";
44    static final String lightDir         = "lightDir";
45
46    static final String view             = "view";
47    static final String proj             = "proj";
48    static final String viewProj         = "viewProj";
49    static final String model            = "model";
50    static final String modelView        = "modelView";
51    static final String modelViewProj    = "modelViewProj";
52
53    static final long sMaxTimeStamp = 0xffffffffL;
54
55    ScriptField_ShaderParamData_s.Item mData;
56    ScriptField_ShaderParamData_s mField;
57
58    String mParamName;
59    Camera mCamera;
60
61    static ScriptField_ShaderParam_s fillInParams(Element constantElem,
62                                                  HashMap<String, ShaderParam> sourceParams,
63                                                  Transform transform) {
64        RenderScriptGL rs = SceneManager.getRS();
65        ArrayList<ScriptField_ShaderParam_s.Item> paramList;
66        paramList = new ArrayList<ScriptField_ShaderParam_s.Item>();
67
68        int subElemCount = constantElem.getSubElementCount();
69        for (int i = 0; i < subElemCount; i ++) {
70            String inputName = constantElem.getSubElementName(i);
71            int offset = constantElem.getSubElementOffsetBytes(i);
72
73            ShaderParam matchingParam = sourceParams.get(inputName);
74            Element subElem = constantElem.getSubElement(i);
75            // Make one if it's not there
76            if (matchingParam == null) {
77                if (subElem.getDataType() == Element.DataType.FLOAT_32) {
78                    matchingParam = new Float4Param(inputName, 0.5f, 0.5f, 0.5f, 0.5f);
79                } else if (subElem.getDataType() == Element.DataType.MATRIX_4X4) {
80                    TransformParam trParam = new TransformParam(inputName);
81                    trParam.setTransform(transform);
82                    matchingParam = trParam;
83                }
84            }
85            ScriptField_ShaderParam_s.Item paramRS = new ScriptField_ShaderParam_s.Item();
86            paramRS.bufferOffset = offset;
87            paramRS.transformTimestamp = 0;
88            paramRS.dataTimestamp = 0;
89            paramRS.data = matchingParam.getRSData().getAllocation();
90            if (subElem.getDataType() == Element.DataType.FLOAT_32) {
91                paramRS.float_vecSize = subElem.getVectorSize();
92            }
93
94            paramList.add(paramRS);
95        }
96
97        ScriptField_ShaderParam_s rsParams = null;
98        int paramCount = paramList.size();
99        if (paramCount != 0) {
100            rsParams = new ScriptField_ShaderParam_s(rs, paramCount);
101            for (int i = 0; i < paramCount; i++) {
102                rsParams.set(paramList.get(i), i, false);
103            }
104            rsParams.copyAll();
105        }
106        return rsParams;
107    }
108
109    public ShaderParam(String name) {
110        mParamName = name;
111        mData = new ScriptField_ShaderParamData_s.Item();
112    }
113
114    public String getParamName() {
115        return mParamName;
116    }
117
118    public void setCamera(Camera c) {
119        mCamera = c;
120        if (mField != null) {
121            mData.camera = mCamera.getRSData().getAllocation();
122            mField.set_camera(0, mData.camera, true);
123        }
124    }
125
126    protected void incTimestamp() {
127        if (mField != null) {
128            mData.timestamp ++;
129            mData.timestamp %= sMaxTimeStamp;
130            mField.set_timestamp(0, mData.timestamp, true);
131        }
132    }
133
134    abstract void initLocalData();
135
136    public ScriptField_ShaderParamData_s getRSData() {
137        if (mField != null) {
138            return mField;
139        }
140
141        RenderScriptGL rs = SceneManager.getRS();
142        mField = new ScriptField_ShaderParamData_s(rs, 1);
143
144        if (mParamName != null) {
145            mData.paramName = SceneManager.getCachedAlloc(mParamName);
146            if (mData.paramName == null) {
147                mData.paramName = SceneManager.getStringAsAllocation(rs, mParamName);
148                SceneManager.cacheAlloc(mParamName, mData.paramName);
149            }
150        }
151        initLocalData();
152        mData.timestamp = 1;
153
154        mField.set(mData, 0, true);
155        return mField;
156    }
157}
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