open_gl_background.h

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#pragma once
 
#include "JuceHeader.h"
#include "open_gl_component.h"
 
#include <mutex>
 
class OpenGlBackground {
public:
    OpenGlBackground();
 
    virtual ~OpenGlBackground();
 
    void updateBackgroundImage(Image background);
 
    virtual void init(OpenGlWrapper& open_gl);
 
    virtual void render(OpenGlWrapper& open_gl);
 
    virtual void destroy(OpenGlWrapper& open_gl);
 
    void lock() { mutex_.lock(); }
 
    void unlock() { mutex_.unlock(); }
 
    OpenGLShaderProgram* shader() { return image_shader_; }
 
    OpenGLShaderProgram::Uniform* texture_uniform() { return texture_uniform_.get(); }
 
    void bind(OpenGLContext& open_gl_context);
 
    void enableAttributes(OpenGLContext& open_gl_context);
 
    void disableAttributes(OpenGLContext& open_gl_context);
 
private:
    OpenGLShaderProgram* image_shader_;   
    std::unique_ptr<OpenGLShaderProgram::Uniform> texture_uniform_;  
    std::unique_ptr<OpenGLShaderProgram::Attribute> position_;       
    std::unique_ptr<OpenGLShaderProgram::Attribute> texture_coordinates_; 
 
    float vertices_[16];  
 
    std::mutex mutex_;    
    OpenGLTexture background_;  
    bool new_background_;  
    Image background_image_; 
 
    GLuint vertex_buffer_;   
    GLuint triangle_buffer_; 
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(OpenGlBackground)
};