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