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Diffstat (limited to 'services/surfaceflinger/RenderEngine/Mesh.h')
-rw-r--r-- | services/surfaceflinger/RenderEngine/Mesh.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/services/surfaceflinger/RenderEngine/Mesh.h b/services/surfaceflinger/RenderEngine/Mesh.h new file mode 100644 index 0000000..b6d42b0 --- /dev/null +++ b/services/surfaceflinger/RenderEngine/Mesh.h @@ -0,0 +1,99 @@ +/* + * 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 <stdint.h> + +namespace android { + +class Mesh { +public: + enum Primitive { + TRIANGLES = 0x0004, // GL_TRIANGLES + TRIANGLE_STRIP = 0x0005, // GL_TRIANGLE_STRIP + TRIANGLE_FAN = 0x0006 // GL_TRIANGLE_FAN + }; + + Mesh(Primitive primitive, size_t vertexCount, size_t vertexSize, size_t texCoordsSize = 0); + ~Mesh(); + + /* + * VertexArray handles the stride automatically. + */ + template <typename TYPE> + class VertexArray { + friend class Mesh; + float* mData; + size_t mStride; + VertexArray(float* data, size_t stride) : mData(data), mStride(stride) { } + public: + TYPE& operator[](size_t index) { + return *reinterpret_cast<TYPE*>(&mData[index*mStride]); + } + TYPE const& operator[](size_t index) const { + return *reinterpret_cast<TYPE const*>(&mData[index*mStride]); + } + }; + + template <typename TYPE> + VertexArray<TYPE> getPositionArray() { return VertexArray<TYPE>(getPositions(), mStride); } + + template <typename TYPE> + VertexArray<TYPE> getTexCoordArray() { return VertexArray<TYPE>(getTexCoords(), mStride); } + + 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; + + // 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; + + // return stride in bytes + size_t getByteStride() const; + + // return stride in floats + size_t getStride() const; + +private: + Mesh(const Mesh&); + Mesh& operator = (const Mesh&); + Mesh const& operator = (const Mesh&) const; + + float* getPositions(); + float* getTexCoords(); + float* mVertices; + size_t mVertexCount; + size_t mVertexSize; + size_t mTexCoordsSize; + size_t mStride; + Primitive mPrimitive; +}; + + +} /* namespace android */ +#endif /* SF_RENDER_ENGINE_MESH_H */ |