rainmeter-studio/Library/MeterImage.h

/*
  Copyright (C) 2002 Kimmo Pekkola

  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 __METERIMAGE_H__
#define __METERIMAGE_H__

#include "Meter.h"
#include "MeterWindow.h"

namespace Gdiplus 
{
	class Bitmap;
};

class CMeterImage : public CMeter
{
public:
	CMeterImage(CMeterWindow* meterWindow, WCHAR* wName = L"W", WCHAR* hName = L"H");
	virtual ~CMeterImage();

	virtual void ReadConfig(const WCHAR* section);
	virtual void Initialize();
	virtual bool Update();
	virtual bool Draw(Gdiplus::Graphics& graphics);
	virtual void BindMeasure(std::list<CMeasure*>& measures);

protected:
	void LoadImage(bool bLoadAlways);
	bool CompareColorMatrix(const Gdiplus::ColorMatrix& a, const Gdiplus::ColorMatrix& b);
	void ApplyTint();
	Gdiplus::Bitmap* TurnGreyscale();
	void ApplyTransform();
	
	const std::wstring m_ImageWidthString;
	const std::wstring m_ImageHeightString;

	Gdiplus::Bitmap* m_Bitmap;			// The bitmap
	Gdiplus::Bitmap* m_BitmapTint;		// The bitmap
	std::wstring m_ImageName;			// Name of the image
	std::wstring m_Path;
	bool m_NeedsReload;
	bool m_NeedsTinting;
	bool m_NeedsTransform;
	bool m_WidthDefined;
	bool m_HeightDefined;
	bool m_PreserveAspectRatio;			// If true, aspect ratio of the image is preserved when the image is scaled
	HGLOBAL m_hBuffer;
	FILETIME m_Modified;

	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