Added image manipulation codes to Meter=BITMAP/BUTTON/HISTOGRAM and refactored them.

For BITMAP/BUTTON:
- Greyscale
- ImageTint
- ImageAlpha
- ColorMatrixN
- ImageFlip
Note: BITMAP and BUTTON are not able to support ImageRotate.

For HISTOGRAM:
- PrimaryGreyscale
- PrimaryImageTint
- PrimaryImageAlpha
- PrimaryColorMatrixN
- PrimaryImageFlip
- PrimaryImageRotate
- Secondary***
- Both***

Library/TintedImage.h

@@ -0,0 +1,85 @@
+/*
+  Copyright (C) 2010 Kimmo Pekkola, MattKing, spx
+
+  This program 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 2
+  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 program; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+#ifndef __TINTEDIMAGE_H__
+#define __TINTEDIMAGE_H__
+
+#include "Meter.h"
+#include "MeterWindow.h"
+
+class CTintedImage
+{
+public:
+	CTintedImage(bool disableTransform = false);
+	virtual ~CTintedImage();
+
+	void SetConfigAttributes(const WCHAR* name, const WCHAR* prefix);
+	void ReadConfig(CConfigParser& parser, const WCHAR* section);
+
+	bool IsLoaded() { return (m_Bitmap != NULL); }
+	bool IsTinted() { return (m_BitmapTint != NULL); }
+	bool IsConfigsChanged() { return m_NeedsTinting || m_NeedsTransform; }
+	void ClearConfigFlags() { m_NeedsTinting = m_NeedsTransform = false; }
+
+	Gdiplus::Bitmap* GetOriginalImage() { return m_Bitmap; }
+	Gdiplus::Bitmap* GetTintedImage() { return m_BitmapTint; }
+	Gdiplus::Bitmap* GetImage() { return (m_BitmapTint) ? m_BitmapTint : m_Bitmap; }
+
+	void DisposeImage();
+	void LoadImage(const std::wstring& imageName, bool bLoadAlways);
+
+protected:
+	void ApplyTint();
+	void ApplyTransform();
+
+	static Gdiplus::Bitmap* TurnGreyscale(Gdiplus::Bitmap* source);
+	static bool CompareColorMatrix(const Gdiplus::ColorMatrix& a, const Gdiplus::ColorMatrix& b);
+
+	Gdiplus::Bitmap* m_Bitmap;			// The bitmap
+	Gdiplus::Bitmap* m_BitmapTint;		// The tinted bitmap
+
+	HGLOBAL m_hBuffer;
+	FILETIME m_Modified;
+
+	std::wstring m_ConfigName;
+	std::wstring m_ConfigGreyscale;
+	std::wstring m_ConfigImageTint;
+	std::wstring m_ConfigImageAlpha;
+	std::wstring m_ConfigColorMatrix1;
+	std::wstring m_ConfigColorMatrix2;
+	std::wstring m_ConfigColorMatrix3;
+	std::wstring m_ConfigColorMatrix4;
+	std::wstring m_ConfigColorMatrix5;
+	std::wstring m_ConfigImageFlip;
+	std::wstring m_ConfigImageRotate;
+
+	const bool m_DisableTransform;
+
+	bool m_NeedsTinting;
+	bool m_NeedsTransform;
+
+	bool m_GreyScale;
+	Gdiplus::ColorMatrix m_ColorMatrix;
+	Gdiplus::RotateFlipType m_Flip;
+	Gdiplus::REAL m_Rotate;
+
+	static const Gdiplus::ColorMatrix c_GreyScaleMatrix;
+	static const Gdiplus::ColorMatrix c_IdentifyMatrix;
+};
+
+#endif