1 /*
2  * Copyright (C) 2009 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_SAMPLER_H
18 #define ANDROID_RS_SAMPLER_H
19 
20 #include "rsAllocation.h"
21 
22 #include <vector>
23 
24 // ---------------------------------------------------------------------------
25 namespace android {
26 namespace renderscript {
27 
28 const static uint32_t RS_MAX_SAMPLER_SLOT = 16;
29 
30 class SamplerState;
31 /*****************************************************************************
32  * CAUTION
33  *
34  * Any layout changes for this class may require a corresponding change to be
35  * made to frameworks/compile/libbcc/lib/ScriptCRT/rs_core.c, which contains
36  * a partial copy of the information below.
37  *
38  *****************************************************************************/
39 class Sampler : public ObjectBase {
40 public:
41     struct Hal {
42         mutable void *drv;
43 
44         struct State {
45             RsSamplerValue magFilter;
46             RsSamplerValue minFilter;
47             RsSamplerValue wrapS;
48             RsSamplerValue wrapT;
49             RsSamplerValue wrapR;
50             float aniso;
51         };
52         State state;
53     };
54     Hal mHal;
55 
56     void operator delete(void* ptr);
57 
58     static ObjectBaseRef<Sampler> getSampler(Context *,
59                                              RsSamplerValue magFilter,
60                                              RsSamplerValue minFilter,
61                                              RsSamplerValue wrapS,
62                                              RsSamplerValue wrapT,
63                                              RsSamplerValue wrapR,
64                                              float aniso = 1.0f);
65     void bindToContext(SamplerState *, uint32_t slot);
66     void unbindFromContext(SamplerState *);
67 
68     virtual void serialize(Context *rsc, OStream *stream) const;
getClassId()69     virtual RsA3DClassID getClassId() const { return RS_A3D_CLASS_ID_SAMPLER; }
70     static Sampler *createFromStream(Context *rsc, IStream *stream);
71 
72 protected:
73     int32_t mBoundSlot;
74 
75     virtual void preDestroy() const;
76     virtual ~Sampler();
77 
78 private:
79     explicit Sampler(Context *);
80     Sampler(Context *,
81             RsSamplerValue magFilter,
82             RsSamplerValue minFilter,
83             RsSamplerValue wrapS,
84             RsSamplerValue wrapT,
85             RsSamplerValue wrapR,
86             float aniso = 1.0f);
87 };
88 
89 
90 class SamplerState {
91 public:
92     ObjectBaseRef<Sampler> mSamplers[RS_MAX_SAMPLER_SLOT];
init(Context * rsc)93     void init(Context *rsc) {
94     }
deinit(Context * rsc)95     void deinit(Context *rsc) {
96         for (uint32_t i = 0; i < RS_MAX_SAMPLER_SLOT; i ++) {
97             mSamplers[i].clear();
98         }
99     }
100     // Cache of all existing raster programs.
101     std::vector<Sampler *> mAllSamplers;
102 };
103 
104 } // namespace renderscript
105 } // namespace android
106 #endif //ANDROID_RS_SAMPLER_H
107 
108 
109 
110