Initial source commit

Initial source commit

Source/Fractorium/GLWidget.h

@@ -0,0 +1,76 @@
+#pragma once
+
+#include "FractoriumEmberController.h"
+
+/// <summary>
+/// GLWidget class.
+/// </summary>
+
+class Fractorium;//Forward declaration since Fractorium uses this widget.
+
+static const float GridStep = 1.0f / 8.0f;
+
+/// <summary>
+/// The main drawing area.
+/// This uses the Qt wrapper around OpenGL to draw the output of the render to a texture whose
+/// size matches the size of the window.
+/// On top of that, the circles that represent the pre and post affine transforms for each xform are drawn.
+/// Based on values specified on the GUI, it will either draw the presently selected xform, or all of them.
+/// It can show/hide pre/post affine as well.
+/// The currently selected xform is drawn with a circle around it, with all others only showing their axes.
+/// The current xform is set by either clicking on it, or by changing the index of the xforms combo box on the main window.
+/// A problem here is that all drawing is done using the legacy OpenGL fixed function pipeline which is deprecated
+/// and even completely disabled on Mac OS. This will need to be replaced with shader programs for every draw operation.
+/// Since this window has to know about various states of the renderer and the main window, it retains pointers to 
+/// the main window and several of its members.
+/// This class uses a controller-based design similar to the main window.
+/// </summary>
+class GLWidget : public QGLWidget, protected QOpenGLFunctions_2_0//QOpenGLFunctions_3_2_Compatibility//QOpenGLFunctions_3_2_Core//, protected QOpenGLFunctions
+{
+	Q_OBJECT
+
+	friend Fractorium;
+	friend FractoriumEmberController<float>;
+	friend FractoriumEmberController<double>;
+	friend GLEmberControllerBase;
+	friend GLEmberController<float>;
+	friend GLEmberController<double>;
+
+public:
+	GLWidget(QWidget* parent);
+	~GLWidget();
+	void DrawQuad();
+	void SetMainWindow(Fractorium* f);
+	bool Init();
+	bool Drawing();
+	GLuint OutputTexID();
+
+protected:
+	virtual void initializeGL();
+	virtual void paintGL();
+	virtual void keyPressEvent(QKeyEvent* e);
+	virtual void keyReleaseEvent(QKeyEvent* e);
+	virtual void mousePressEvent(QMouseEvent* e);
+	virtual void mouseReleaseEvent(QMouseEvent* e);
+	virtual void mouseMoveEvent(QMouseEvent* e);
+	virtual void wheelEvent(QWheelEvent* e);
+	virtual void resizeEvent(QResizeEvent* e);
+
+private:
+	bool Allocate(bool force = false);
+	bool Deallocate();
+	void SetViewport();
+	void DrawGrid();
+	void DrawUnitSquare();
+	void DrawAffineHelper(bool selected, bool pre, bool final, bool background);
+	GLEmberControllerBase* GLController();
+
+	bool m_Init;
+	bool m_Drawing;
+	GLint m_TexWidth;
+	GLint m_TexHeight;
+	GLint m_ViewWidth;
+	GLint m_ViewHeight;
+	GLuint m_OutputTexID;
+	Fractorium* m_Fractorium;
+};