1 /* 2 * Copyright 2013 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 SF_RENDER_ENGINE_MESH_H 18 #define SF_RENDER_ENGINE_MESH_H 19 20 #include <stdint.h> 21 22 namespace android { 23 24 class Mesh { 25 public: 26 enum Primitive { 27 TRIANGLES = 0x0004, // GL_TRIANGLES 28 TRIANGLE_STRIP = 0x0005, // GL_TRIANGLE_STRIP 29 TRIANGLE_FAN = 0x0006 // GL_TRIANGLE_FAN 30 }; 31 32 Mesh(Primitive primitive, size_t vertexCount, size_t vertexSize, size_t texCoordsSize = 0); 33 ~Mesh(); 34 35 /* 36 * VertexArray handles the stride automatically. 37 */ 38 template <typename TYPE> 39 class VertexArray { 40 friend class Mesh; 41 float* mData; 42 size_t mStride; VertexArray(float * data,size_t stride)43 VertexArray(float* data, size_t stride) : mData(data), mStride(stride) { } 44 public: 45 TYPE& operator[](size_t index) { 46 return *reinterpret_cast<TYPE*>(&mData[index*mStride]); 47 } 48 TYPE const& operator[](size_t index) const { 49 return *reinterpret_cast<TYPE const*>(&mData[index*mStride]); 50 } 51 }; 52 53 template <typename TYPE> getPositionArray()54 VertexArray<TYPE> getPositionArray() { return VertexArray<TYPE>(getPositions(), mStride); } 55 56 template <typename TYPE> getTexCoordArray()57 VertexArray<TYPE> getTexCoordArray() { return VertexArray<TYPE>(getTexCoords(), mStride); } 58 59 Primitive getPrimitive() const; 60 61 // returns a pointer to the vertices positions 62 float const* getPositions() const; 63 64 // returns a pointer to the vertices texture coordinates 65 float const* getTexCoords() const; 66 67 // number of vertices in this mesh 68 size_t getVertexCount() const; 69 70 // dimension of vertices 71 size_t getVertexSize() const; 72 73 // dimension of texture coordinates 74 size_t getTexCoordsSize() const; 75 76 // return stride in bytes 77 size_t getByteStride() const; 78 79 // return stride in floats 80 size_t getStride() const; 81 82 private: 83 Mesh(const Mesh&); 84 Mesh& operator = (const Mesh&); 85 Mesh const& operator = (const Mesh&) const; 86 87 float* getPositions(); 88 float* getTexCoords(); 89 float* mVertices; 90 size_t mVertexCount; 91 size_t mVertexSize; 92 size_t mTexCoordsSize; 93 size_t mStride; 94 Primitive mPrimitive; 95 }; 96 97 98 } /* namespace android */ 99 #endif /* SF_RENDER_ENGINE_MESH_H */ 100