demotool/texture.hh

#pragma once
#ifndef REAL_BUILD
# include "externals.hh"
#endif


enum class E_TexType {
	RGBA8 ,
	RGBA16F ,
	RGB8 ,
	RGB16F ,
	R8 ,
	R16F ,
};

enum class E_TexSampling {
	NEAREST ,
	LINEAR ,
};

enum class E_TexWrap {
	REPEAT ,
	CLAMP_EDGE ,
	CLAMP_BORDER
};

struct T_Texture
{
	T_Texture( ) = delete;
	T_Texture( T_Texture const& ) = delete;
	T_Texture( T_Texture&& ) = delete;

	T_Texture(
			__rd__ const uint32_t width ,
			__rd__ const uint32_t height ,
			__rd__ const E_TexType type ,
			__rd__ const uint32_t levels = 1 );
	~T_Texture( );

	T_Texture& samplingMode(
			__rd__ const E_TexSampling mode );
	T_Texture& wrap(
			__rd__ const E_TexWrap mode );

	GLuint id( ) const noexcept { return id_; }
	uint32_t levels( ) const noexcept { return levels_; }
	uint32_t width( ) const noexcept { return width_; }
	uint32_t height( ) const noexcept { return height_; }

    private:
	GLuint id_;
	uint32_t levels_ , width_ , height_;
};

struct T_TextureBinding
{
	T_TextureBinding( ) = delete;
	T_TextureBinding( T_TextureBinding const& ) = delete;
	T_TextureBinding( T_TextureBinding&& ) = delete;

	explicit T_TextureBinding(
			__rd__ const uint32_t binding );

	void clear( );
	void set( __rd__ const uint32_t uniform ,
			__rd__ T_Texture const& texture );

	void bind( ) const;

    private:
	const uint32_t binding_;
	uint32_t uniform_;
	T_Texture const* texture_;
};