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 
17 #ifndef ANDROID_RS_PROGRAM_H
18 #define ANDROID_RS_PROGRAM_H
19 
20 #include "rsProgramBase.h"
21 #include "rsElement.h"
22 
23 // ---------------------------------------------------------------------------
24 namespace android {
25 namespace renderscript {
26 
27 #define RS_SHADER_INTERNAL "//rs_shader_internal\n"
28 #define RS_SHADER_ATTR "ATTRIB_"
29 #define RS_SHADER_UNI "UNI_"
30 
31 class Program : public ProgramBase {
32 public:
33     struct Hal {
34         mutable void *drv;
35 
36         struct State {
37             // The difference between Textures and Constants is how they are accessed
38             // Texture lookups go though a sampler which in effect converts normalized
39             // coordinates into type specific.  Multiple samples may also be taken
40             // and filtered.
41             //
42             // Constants are strictly accessed by the shader code
43             Allocation **textures;
44             RsTextureTarget *textureTargets;
45             uint32_t texturesCount;
46 
47             Sampler **samplers;
48             uint32_t samplersCount;
49 
50             Allocation **constants;
51             Type **constantTypes;
52             uint32_t constantsCount;
53 
54             Element **inputElements;
55             uint32_t inputElementsCount;
56         };
57         State state;
58     };
59     Hal mHal;
60 
61     Program(Context *, const char * shaderText, size_t shaderLength,
62             const uintptr_t * params, size_t paramLength);
63     virtual ~Program();
64     virtual bool freeChildren();
65 
66     void bindAllocation(Context *, Allocation *, uint32_t slot);
67 
isUserProgram()68     bool isUserProgram() const {return !mIsInternal;}
69 
70     void bindTexture(Context *, uint32_t slot, Allocation *);
71     void bindSampler(Context *, uint32_t slot, Sampler *);
72 
73 protected:
74     ObjectBaseRef<Allocation> *mTextures;
75     ObjectBaseRef<Sampler> *mSamplers;
76     ObjectBaseRef<Allocation> *mConstants;
77     ObjectBaseRef<Type> *mConstantTypes;
78     ObjectBaseRef<Element> *mInputElements;
79 
80     bool mIsInternal;
81     const char *mUserShader;
82     size_t mUserShaderLen;
83     void initMemberVars();
84 };
85 
86 } // namespace renderscript
87 } // namespace android
88 #endif // ANDROID_RS_PROGRAM_H
89 
90 
91 
92