1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 // IndexDataManager.h: Defines the IndexDataManager, a class that 16 // runs the Buffer translation process for index buffers. 17 18 #ifndef LIBGLESV2_INDEXDATAMANAGER_H_ 19 #define LIBGLESV2_INDEXDATAMANAGER_H_ 20 21 #include "Context.h" 22 23 #include <GLES2/gl2.h> 24 25 namespace es2 26 { 27 28 struct TranslatedIndexData 29 { 30 TranslatedIndexData(unsigned int primitiveCount) : primitiveCount(primitiveCount) {} 31 32 unsigned int minIndex; 33 unsigned int maxIndex; 34 unsigned int indexOffset; 35 unsigned int primitiveCount; 36 37 sw::Resource *indexBuffer; 38 }; 39 40 class StreamingIndexBuffer 41 { 42 public: 43 StreamingIndexBuffer(size_t initialSize); 44 virtual ~StreamingIndexBuffer(); 45 46 void *map(size_t requiredSpace, size_t *offset); 47 void unmap(); 48 void reserveSpace(size_t requiredSpace, GLenum type); 49 50 sw::Resource *getResource() const; 51 52 private: 53 sw::Resource *mIndexBuffer; 54 size_t mBufferSize; 55 size_t mWritePosition; 56 }; 57 58 class IndexDataManager 59 { 60 public: 61 IndexDataManager(); 62 virtual ~IndexDataManager(); 63 64 GLenum prepareIndexData(GLenum mode, GLenum type, GLuint start, GLuint end, GLsizei count, Buffer *arrayElementBuffer, const void *indices, TranslatedIndexData *translated, bool primitiveRestart); 65 66 static std::size_t typeSize(GLenum type); 67 68 private: 69 StreamingIndexBuffer *mStreamingBuffer; 70 }; 71 72 } 73 74 #endif // LIBGLESV2_INDEXDATAMANAGER_H_ 75
