MeshInstance.h

/*
 * Copyright (C) 2014 Google Inc.
 *
 * 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 MESHINSTANCE_H
#define MESHINSTANCE_H

#include "Mesh.h"
#include "RendererCommon.h"
#include "Shader.h"
#include <vector>

class MeshInstance {
public:
    MeshInstance();
    MeshInstance(GLenum mode, const MeshPtr& mesh, const ShaderPtr& shader);
    ~MeshInstance();

    GLenum getMode() const { return mMode; }
    void setMode(GLenum value);
    const MeshPtr& getMesh() const { return mMesh; }
    void setMesh(const MeshPtr& mesh);
    const ShaderPtr& getShader() const { return mShader; }
    void setShader(const ShaderPtr& shader);

    void bind();
    void unbind();

    static MeshInstancePtr createCompatibleMesh(int vertexCount, GLenum mode,
            const ShaderPtr& shader);
private:
    void invalidateAttributes();
    bool checkAttributes();
    bool areAttributesReady() const;

    MeshPtr mMesh;
    ShaderPtr mShader;
    GLenum mMode = GL_TRIANGLES;
    bool mAttributesInvalid = true;
    std::vector<int> mAttributeIndexes;
};

#endif // MESHINSTANCE_H