cloudcompare/libs/qCC_glWindow/include/ccGLUtils.h

#pragma once
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//#                              CLOUDCOMPARE                              #
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//#  This program is free software; you can redistribute it and/or modify  #
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#include "qCC_glWindow.h"

//qCC_db
#include <ccIncludeGL.h> //Always first!

//Qt
#include <QImage>

//! View orientation
enum CC_VIEW_ORIENTATION {	CC_TOP_VIEW,	/**< Top view (eye: +Z) **/
							CC_BOTTOM_VIEW,	/**< Bottom view **/
							CC_FRONT_VIEW,	/**< Front view **/
							CC_BACK_VIEW,	/**< Back view **/
							CC_LEFT_VIEW,	/**< Left view **/
							CC_RIGHT_VIEW,	/**< Right view **/
							CC_ISO_VIEW_1,	/**< Isometric view 1: front, right and top **/
							CC_ISO_VIEW_2,	/**< Isometric view 2: back, left and top **/
};

class CCGLWINDOW_LIB_API ccGLUtils
{
public:

	/***************************************************
					OpenGL Textures
	***************************************************/

	static void DisplayTexture2DPosition(QImage image, int x, int y, int w, int h, unsigned char alpha = 255);
	inline static void DisplayTexture2D(QImage image, int w, int h, unsigned char alpha = 255) { DisplayTexture2DPosition(image, -w / 2, -h / 2, w, h, alpha); }

	static void DisplayTexture2DPosition(GLuint texID, int x, int y, int w, int h, unsigned char alpha = 255);
	inline static void DisplayTexture2D(GLuint texID, int w, int h, unsigned char alpha = 255) { DisplayTexture2DPosition(texID, -w / 2, -h / 2, w, h, alpha); }

	/***************************************************
					OpenGL Matrices
	***************************************************/

	//! Returns a 4x4 'OpenGL' matrix corresponding to a default 'view' orientation
	/** \param orientation view orientation
		\return corresponding GL matrix
	**/
	static ccGLMatrixd GenerateViewMat(CC_VIEW_ORIENTATION orientation);

};