FragmentShader.java revision 4bda82de0bca754f3ce387e9968170c5122241a9 
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;
21
22import android.content.res.Resources;
23import android.renderscript.*;
24import android.renderscript.ProgramFragment.Builder;
25import android.util.Log;
26
27/**
28 * @hide
29 */
30public class FragmentShader extends Shader {
31    ProgramFragment mProgram;
32    ScriptField_FragmentShader_s mField;
33
34    public static class Builder {
35
36        FragmentShader mShader;
37        ProgramFragment.Builder mBuilder;
38
39        public Builder(RenderScriptGL rs) {
40            mShader = new FragmentShader();
41            mBuilder = new ProgramFragment.Builder(rs);
42        }
43
44        public Builder setShader(Resources resources, int resourceID) {
45            mBuilder.setShader(resources, resourceID);
46            return this;
47        }
48
49        public Builder setObjectConst(Type type) {
50            mShader.mPerObjConstants = type;
51            return this;
52        }
53
54        public Builder setShaderConst(Type type) {
55            mShader.mPerShaderConstants = type;
56            return this;
57        }
58
59        public Builder addShaderTexture(Program.TextureType texType, String name) {
60            mShader.mShaderTextureNames.add(name);
61            mShader.mShaderTextureTypes.add(texType);
62            return this;
63        }
64
65        public Builder addTexture(Program.TextureType texType, String name) {
66            mShader.mTextureNames.add(name);
67            mShader.mTextureTypes.add(texType);
68            return this;
69        }
70
71        public FragmentShader create() {
72            if (mShader.mPerShaderConstants != null) {
73                mBuilder.addConstant(mShader.mPerShaderConstants);
74            }
75            if (mShader.mPerObjConstants != null) {
76                mBuilder.addConstant(mShader.mPerObjConstants);
77            }
78            for (int i = 0; i < mShader.mTextureTypes.size(); i ++) {
79                mBuilder.addTexture(mShader.mTextureTypes.get(i));
80            }
81            for (int i = 0; i < mShader.mShaderTextureTypes.size(); i ++) {
82                mBuilder.addTexture(mShader.mShaderTextureTypes.get(i));
83            }
84
85            mShader.mProgram = mBuilder.create();
86            return mShader;
87        }
88    }
89
90    public ProgramFragment getProgram() {
91        return mProgram;
92    }
93
94    public void updateTextures(RenderScriptGL rs, Resources res) {
95        int shaderTextureStart = mTextureTypes.size();
96        for (int i = 0; i < mShaderTextureNames.size(); i ++) {
97            ShaderParam sp = mSourceParams.get(mShaderTextureNames.get(i));
98            if (sp != null && sp instanceof TextureParam) {
99                TextureParam p = (TextureParam)sp;
100                mProgram.bindTexture(p.getTexture().getRsData(rs, res), shaderTextureStart + i);
101            }
102        }
103    }
104
105    public ScriptField_FragmentShader_s getRSData(RenderScriptGL rs, Resources res) {
106        if (mField != null) {
107            return mField;
108        }
109
110        ScriptField_FragmentShader_s.Item item = new ScriptField_FragmentShader_s.Item();
111        item.program = mProgram;
112
113        linkConstants(rs, res);
114        if (mPerShaderConstants != null) {
115            item.shaderConst = mConstantBuffer;
116            item.shaderConstParams = mConstantBufferParams;
117            mProgram.bindConstants(item.shaderConst, 0);
118        }
119
120        item.objectConstIndex = -1;
121        if (mPerObjConstants != null) {
122            item.objectConstIndex = mPerShaderConstants != null ? 1 : 0;
123        }
124
125        mField = new ScriptField_FragmentShader_s(rs, 1);
126        mField.set(item, 0, true);
127        return mField;
128    }
129}
130