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// ---------------------------------------------------------------------------
25namespace android {
26namespace renderscript {
27
28const static uint32_t RS_MAX_SAMPLER_SLOT = 16;
29
30class 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 *****************************************************************************/
39class Sampler : public ObjectBase {
40public:
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;
69    virtual RsA3DClassID getClassId() const { return RS_A3D_CLASS_ID_SAMPLER; }
70    static Sampler *createFromStream(Context *rsc, IStream *stream);
71
72protected:
73    int32_t mBoundSlot;
74
75    virtual void preDestroy() const;
76    virtual ~Sampler();
77
78private:
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
90class SamplerState {
91public:
92    ObjectBaseRef<Sampler> mSamplers[RS_MAX_SAMPLER_SLOT];
93    void init(Context *rsc) {
94    }
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