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      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;
     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];
     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