--User changes

-Add a palette editor.
 -Add support for reading .ugr/.gradient/.gradients palette files.
 -Allow toggling on spinners whose minimum value is not zero.
 -Allow toggling display of image, affines and grid.
 -Add new variations: cylinder2, circlesplit, tile_log, truchet_fill, waves2_radial.

--Bug fixes
 -cpow2 was wrong.
 -Palettes with rapid changes in color would produce slightly different outputs from Apo/Chaotica. This was due to a long standing bug from flam3.
 -Use exec() on Apple and show() on all other OSes for dialog boxes.
 -Trying to render a sequence with no frames would crash.
 -Selecting multiple xforms and rotating them would produce the wrong rotation.
 -Better handling when parsing flames using different encoding, such as unicode and UTF-8.
 -Switching between SP/DP didn't reselect the selected flame in the Library tab.

--Code changes
 -Make all types concerning palettes be floats, including PaletteTableWidgetItem.
 -PaletteTableWidgetItem is no longer templated because all palettes are float.
 -Include the source colors for user created gradients.
 -Change parallel_for() calls to work with very old versions of TBB which are lingering on some systems.
 -Split conditional out of accumulation loop on the CPU for better performance.
 -Vectorize summing when doing density filter for better performance.
 -Make all usage of palettes be of type float, double is pointless.
 -Allow palettes to reside in multiple folders, while ensuring only one of each name is added.
 -Refactor some palette path searching code.
 -Make ReadFile() throw and catch an exception if the file operation fails.
 -A little extra safety in foci and foci3D with a call to Zeps().
 -Cast to (real_t) in the OpenCL string for the w variation, which was having trouble compiling on Mac.
 -Fixing missing comma between paths in InitPaletteList().
 -Move Xml and PaletteList classes into cpp to shorten build times when working on them.
 -Remove default param values for IterOpenCLKernelCreator<T>::SharedDataIndexDefines in cpp file.
 -Change more NULL to nullptr.

Source/Fractorium/PaletteEditor/GradientArrow.h

@@ -0,0 +1,78 @@
+/****************************************************************************/
+// This file is part of the gradLib library originally made by Stian Broen
+//
+// For more free libraries, please visit <http://broentech.no>
+//
+// gradLib is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this library.  If not, see <http://www.gnu.org/licenses/>
+/****************************************************************************/
+
+#pragma once
+
+#include "FractoriumPch.h"
+
+/// <summary>
+/// Class for drawing the small arrows below the gradient in the palette editor.
+/// The drawing is accomplished via a QPolygon object.
+/// </summary>
+class GradientArrow
+{
+public:
+	/// <summary>
+	/// Default constructor which sets up the size of the arrow.
+	/// </summary>
+	explicit GradientArrow()
+	{
+		QPolygon area;
+		area << QPoint(5, 5) << QPoint(10, 0) << QPoint(15, 5) << QPoint(15, 15) << QPoint(5, 15) << QPoint(5, 5);
+		Area(area);
+	}
+
+	/// <summary>
+	/// Constructor which takes the color and focus state of the arrow.
+	/// </summary>
+	/// <param name="col">The color of the arrow</param>
+	/// <param name="focus">Whether the arrow is focused</param>
+	explicit GradientArrow(QColor col, bool focus)
+		: GradientArrow()
+	{
+		m_Color = col;
+		m_Focus = focus;
+	}
+
+	/// <summary>
+	/// Copy constructor to copy another GradientArrow.
+	/// </summary>
+	/// <param name="other">The GradientArrow object to copy</param>
+	GradientArrow(const GradientArrow& other)
+		: m_Focus(other.Focus()),
+		  m_Area(other.Area()),
+		  m_Color(other.Color())
+	{
+	}
+
+	/// <summary>
+	/// Getters and setters.
+	/// </summary>
+	inline bool Focus() const { return m_Focus; }
+	inline void Focus(bool val) { m_Focus = val; }
+	inline const QPolygon Area() const { return m_Area; }
+	inline void Area(const QPolygon& val) {m_Area = val; }
+	inline const QColor Color() const { return m_Color; }
+	inline void Color(const QColor& val) { m_Color = val; }
+
+private:
+	bool m_Focus;
+	QPolygon m_Area;
+	QColor m_Color;
+};