InstancedShader.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 INSTANCEDSHADER_H
#define INSTANCEDSHADER_H

#include "RendererCommon.h"
#include "Shader.h"
#include "Texture.h"

class InstancedShader : public Shader {
public:
    explicit InstancedShader(const ShaderPtr& sharedShader);
    virtual ~InstancedShader();

    const ShaderPtr& getSharedShader() const { return mSharedShader; }

    virtual bool isCurrent() const override;
    virtual bool isValid() const override;
    virtual bool isCompiled() const override;
    virtual GLuint getProgramId() const override;

    virtual void begin() override;
    virtual void end() override;
    virtual void compile() override;
    virtual std::string getErrorLog() const override;

    virtual int getAttributeLocation(int index) const override;
    virtual int getUniformLocation(int index) const override;

    void setIndexedTexture(int index, int stage, const TexturePtr& value, TexturePtr* stateValue);

protected:
    virtual void updateState();

private:
    ShaderPtr mSharedShader;
    bool mCurrentShader = false;
};

#endif // INSTANCEDSHADER_H