1/*
2 * Copyright (C) 2008 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 android.renderscript;
18
19
20import android.util.Log;
21
22
23/**
24 * @hide
25 * @deprecated in API 16
26 * <p>The RenderScript fragment program, also known as fragment shader is responsible
27 * for manipulating pixel data in a user defined way. It's constructed from a GLSL
28 * shader string containing the program body, textures inputs, and a Type object
29 * that describes the constants used by the program. Similar to the vertex programs,
30 * when an allocation with constant input values is bound to the shader, its values
31 * are sent to the graphics program automatically.</p>
32 * <p> The values inside the allocation are not explicitly tracked. If they change between two draw
33 * calls using the same program object, the runtime needs to be notified of that
34 * change by calling rsgAllocationSyncAll so it could send the new values to hardware.
35 * Communication between the vertex and fragment programs is handled internally in the
36 * GLSL code. For example, if the fragment program is expecting a varying input called
37 * varTex0, the GLSL code inside the program vertex must provide it.
38 * </p>
39 *
40 **/
41public class ProgramFragment extends Program {
42    ProgramFragment(int id, RenderScript rs) {
43        super(id, rs);
44    }
45
46    /**
47     * @deprecated in API 16
48     */
49    public static class Builder extends BaseProgramBuilder {
50        /**
51         * @deprecated in API 16
52         * Create a builder object.
53         *
54         * @param rs Context to which the program will belong.
55         */
56        public Builder(RenderScript rs) {
57            super(rs);
58        }
59
60        /**
61         * @deprecated in API 16
62         * Creates ProgramFragment from the current state of the builder
63         *
64         * @return  ProgramFragment
65         */
66        public ProgramFragment create() {
67            mRS.validate();
68            int[] tmp = new int[(mInputCount + mOutputCount + mConstantCount + mTextureCount) * 2];
69            String[] texNames = new String[mTextureCount];
70            int idx = 0;
71
72            for (int i=0; i < mInputCount; i++) {
73                tmp[idx++] = ProgramParam.INPUT.mID;
74                tmp[idx++] = mInputs[i].getID(mRS);
75            }
76            for (int i=0; i < mOutputCount; i++) {
77                tmp[idx++] = ProgramParam.OUTPUT.mID;
78                tmp[idx++] = mOutputs[i].getID(mRS);
79            }
80            for (int i=0; i < mConstantCount; i++) {
81                tmp[idx++] = ProgramParam.CONSTANT.mID;
82                tmp[idx++] = mConstants[i].getID(mRS);
83            }
84            for (int i=0; i < mTextureCount; i++) {
85                tmp[idx++] = ProgramParam.TEXTURE_TYPE.mID;
86                tmp[idx++] = mTextureTypes[i].mID;
87                texNames[i] = mTextureNames[i];
88            }
89
90            int id = mRS.nProgramFragmentCreate(mShader, texNames, tmp);
91            ProgramFragment pf = new ProgramFragment(id, mRS);
92            initProgram(pf);
93            return pf;
94        }
95    }
96}
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