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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_STRUCTURED_ELEMENT_H
     18 #define ANDROID_STRUCTURED_ELEMENT_H
     19 
     20 #include "rsComponent.h"
     21 #include "rsUtils.h"
     22 #include "rsObjectBase.h"
     23 
     24 // ---------------------------------------------------------------------------
     25 namespace android {
     26 namespace renderscript {
     27 
     28 
     29 // An element is a group of Components that occupies one cell in a structure.
     30 class Element : public ObjectBase
     31 {
     32 public:
     33     ~Element();
     34 
     35     uint32_t getGLType() const;
     36     uint32_t getGLFormat() const;
     37 
     38     size_t getSizeBits() const;
     39     size_t getSizeBytes() const {
     40         return (getSizeBits() + 7) >> 3;
     41     }
     42 
     43     size_t getFieldOffsetBits(uint32_t componentNumber) const;
     44     size_t getFieldOffsetBytes(uint32_t componentNumber) const {
     45         return (getFieldOffsetBits(componentNumber) + 7) >> 3;
     46     }
     47 
     48     uint32_t getFieldCount() const {return mFieldCount;}
     49     const Element * getField(uint32_t idx) const {return mFields[idx].e.get();}
     50     const char * getFieldName(uint32_t idx) const {return mFields[idx].name.string();}
     51 
     52     const Component & getComponent() const {return mComponent;}
     53     RsDataType getType() const {return mComponent.getType();}
     54     RsDataKind getKind() const {return mComponent.getKind();}
     55     uint32_t getBits() const {return mBits;}
     56 
     57     String8 getCType(uint32_t indent=0) const;
     58     String8 getCStructBody(uint32_t indent=0) const;
     59     String8 getGLSLType(uint32_t indent=0) const;
     60 
     61     void dumpLOGV(const char *prefix) const;
     62 
     63     static const Element * create(Context *rsc, RsDataType dt, RsDataKind dk,
     64                             bool isNorm, uint32_t vecSize);
     65     static const Element * create(Context *rsc, size_t count, const Element **,
     66                             const char **, const size_t * lengths);
     67 
     68 protected:
     69     // deallocate any components that are part of this element.
     70     void clear();
     71 
     72     typedef struct {
     73         String8 name;
     74         ObjectBaseRef<const Element> e;
     75     } ElementField_t;
     76     ElementField_t *mFields;
     77     size_t mFieldCount;
     78 
     79 
     80     Element(Context *);
     81 
     82     Component mComponent;
     83     uint32_t mBits;
     84 };
     85 
     86 
     87 class ElementState {
     88 public:
     89     ElementState();
     90     ~ElementState();
     91 
     92     // Cache of all existing elements.
     93     Vector<const Element *> mElements;
     94 };
     95 
     96 
     97 }
     98 }
     99 #endif //ANDROID_STRUCTURED_ELEMENT_H
    100