SpriteShader.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 SPRITESHADER_H
#define SPRITESHADER_H

#include "RendererCommon.h"
#include "SingletonInstancedShaderBase.h"

class SpriteShader : public SingletonInstancedShaderBase<SpriteShader> {
public:
    void setGlobalProjectionTransform(const Matrix4& matrix);
    void setTransform(const Matrix4& matrix);
    void setTexCoordScale(const Vector2& value);
    void setTexCoordOffset(const Vector2& value);
    void setOpacity(float value);
    void setTexture(const TexturePtr& texture);

protected:
    virtual void updateState() override;

private:
    friend class InstancedShaderBase<SpriteShader>;
    static std::string getVertexShaderCode();
    static std::string getFragmentShaderCode();
    static AttributeSetPtr getAttributeSet();
    static std::vector<std::string> getUniformNames();

    Matrix4 mTransform;
    Vector2 mTexCoordScale = Vector2(1.0f, 1.0f);
    Vector2 mTexCoordOffset = Vector2(0.0f, 0.0f);
    float mOpacity = 1.0f;
    TexturePtr mTexture;

    static const char* VERTEX_SHADER;
    static const char* FRAGMENT_SHADER;
};

#endif // SPRITESHADER_H