| /* |
| * Copyright 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef SF_RENDER_ENGINE_MESH_H |
| #define SF_RENDER_ENGINE_MESH_H |
| |
| #include <vector> |
| |
| #include <stdint.h> |
| |
| namespace android { |
| namespace renderengine { |
| |
| class Mesh { |
| public: |
| class Builder; |
| |
| enum Primitive { |
| TRIANGLES = 0x0004, // GL_TRIANGLES |
| TRIANGLE_STRIP = 0x0005, // GL_TRIANGLE_STRIP |
| TRIANGLE_FAN = 0x0006 // GL_TRIANGLE_FAN |
| }; |
| |
| ~Mesh() = default; |
| |
| /* |
| * VertexArray handles the stride automatically. |
| */ |
| template <typename TYPE> |
| class VertexArray { |
| friend class Mesh; |
| float* mData; |
| size_t mStride; |
| size_t mOffset = 0; |
| VertexArray(float* data, size_t stride) : mData(data), mStride(stride) {} |
| |
| public: |
| // Returns a vertex array at an offset so its easier to append attributes from |
| // multiple sources. |
| VertexArray(VertexArray<TYPE>& other, size_t offset) |
| : mData(other.mData), mStride(other.mStride), mOffset(offset) {} |
| |
| TYPE& operator[](size_t index) { |
| return *reinterpret_cast<TYPE*>(&mData[(index + mOffset) * mStride]); |
| } |
| TYPE const& operator[](size_t index) const { |
| return *reinterpret_cast<TYPE const*>(&mData[(index + mOffset) * mStride]); |
| } |
| }; |
| |
| template <typename TYPE> |
| VertexArray<TYPE> getPositionArray() { |
| return VertexArray<TYPE>(getPositions(), mStride); |
| } |
| |
| template <typename TYPE> |
| VertexArray<TYPE> getTexCoordArray() { |
| return VertexArray<TYPE>(getTexCoords(), mStride); |
| } |
| |
| template <typename TYPE> |
| VertexArray<TYPE> getCropCoordArray() { |
| return VertexArray<TYPE>(getCropCoords(), mStride); |
| } |
| |
| template <typename TYPE> |
| VertexArray<TYPE> getShadowColorArray() { |
| return VertexArray<TYPE>(getShadowColor(), mStride); |
| } |
| |
| template <typename TYPE> |
| VertexArray<TYPE> getShadowParamsArray() { |
| return VertexArray<TYPE>(getShadowParams(), mStride); |
| } |
| |
| uint16_t* getIndicesArray() { return getIndices(); } |
| |
| Primitive getPrimitive() const; |
| |
| // returns a pointer to the vertices positions |
| float const* getPositions() const; |
| |
| // returns a pointer to the vertices texture coordinates |
| float const* getTexCoords() const; |
| |
| // returns a pointer to the vertices crop coordinates |
| float const* getCropCoords() const; |
| |
| // returns a pointer to colors |
| float const* getShadowColor() const; |
| |
| // returns a pointer to the shadow params |
| float const* getShadowParams() const; |
| |
| // returns a pointer to indices |
| uint16_t const* getIndices() const; |
| |
| // number of vertices in this mesh |
| size_t getVertexCount() const; |
| |
| // dimension of vertices |
| size_t getVertexSize() const; |
| |
| // dimension of texture coordinates |
| size_t getTexCoordsSize() const; |
| |
| size_t getShadowParamsSize() const; |
| |
| size_t getShadowColorSize() const; |
| |
| size_t getIndexCount() const; |
| |
| // return stride in bytes |
| size_t getByteStride() const; |
| |
| // return stride in floats |
| size_t getStride() const; |
| |
| private: |
| Mesh(Primitive primitive, size_t vertexCount, size_t vertexSize, size_t texCoordSize, |
| size_t cropCoordsSize, size_t shadowColorSize, size_t shadowParamsSize, size_t indexCount); |
| Mesh(const Mesh&); |
| Mesh& operator=(const Mesh&); |
| Mesh const& operator=(const Mesh&) const; |
| |
| float* getPositions(); |
| float* getTexCoords(); |
| float* getCropCoords(); |
| float* getShadowColor(); |
| float* getShadowParams(); |
| uint16_t* getIndices(); |
| |
| std::vector<float> mVertices; |
| size_t mVertexCount; |
| size_t mVertexSize; |
| size_t mTexCoordsSize; |
| size_t mCropCoordsSize; |
| size_t mShadowColorSize; |
| size_t mShadowParamsSize; |
| size_t mStride; |
| Primitive mPrimitive; |
| std::vector<uint16_t> mIndices; |
| size_t mIndexCount; |
| }; |
| |
| class Mesh::Builder { |
| public: |
| Builder& setPrimitive(Primitive primitive) { |
| mPrimitive = primitive; |
| return *this; |
| }; |
| Builder& setVertices(size_t vertexCount, size_t vertexSize) { |
| mVertexCount = vertexCount; |
| mVertexSize = vertexSize; |
| return *this; |
| }; |
| Builder& setTexCoords(size_t texCoordsSize) { |
| mTexCoordsSize = texCoordsSize; |
| return *this; |
| }; |
| Builder& setCropCoords(size_t cropCoordsSize) { |
| mCropCoordsSize = cropCoordsSize; |
| return *this; |
| }; |
| Builder& setShadowAttrs() { |
| mShadowParamsSize = 3; |
| mShadowColorSize = 4; |
| return *this; |
| }; |
| Builder& setIndices(size_t indexCount) { |
| mIndexCount = indexCount; |
| return *this; |
| }; |
| Mesh build() const { |
| return Mesh{mPrimitive, mVertexCount, mVertexSize, mTexCoordsSize, |
| mCropCoordsSize, mShadowColorSize, mShadowParamsSize, mIndexCount}; |
| } |
| |
| private: |
| size_t mVertexCount = 0; |
| size_t mVertexSize = 0; |
| size_t mTexCoordsSize = 0; |
| size_t mCropCoordsSize = 0; |
| size_t mShadowColorSize = 0; |
| size_t mShadowParamsSize = 0; |
| size_t mIndexCount = 0; |
| Primitive mPrimitive; |
| }; |
| |
| } // namespace renderengine |
| } // namespace android |
| #endif /* SF_RENDER_ENGINE_MESH_H */ |