Magic_Game/Easy2D/Object/Image.cpp

#include "..\easy2d.h"
#include "..\EasyX\easyx.h"
#include <map>
using namespace std;

// ͼƬ<CDBC><C6AC><EFBFBD><EFBFBD>
static map<tstring, CImage*> s_mCImages;
// <20><>ͼƬ<CDBC><C6AC><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>ȡͼƬ
static CImage* GetCImage(tstring name, bool fromRes = false);
// <20><> PNG ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>
static void CrossImage(CImage &img);


Image::Image() :
	m_pCImage(nullptr),
	m_nAlpha(255),
	m_fScaleX(1),
	m_fScaleY(1)
{
}

Image::Image(LPCTSTR ImageFile) :
	Image()
{
	setImage(ImageFile);	// <20><><EFBFBD><EFBFBD>ͼƬ<CDBC><C6AC>Դ
}

Image::Image(LPCTSTR ImageFile, int x, int y, int width, int height) :
	Image()
{
	setImage(ImageFile, x, y, width, height);	// <20><><EFBFBD><EFBFBD>ͼƬ<CDBC><C6AC>Դ<EFBFBD>Ͳü<CDB2><C3BC><EFBFBD>С
}

Image::~Image()
{
}

void Image::_onDraw()
{
	// display <20><><EFBFBD><EFBFBD>Ϊ false<73><65><EFBFBD><EFBFBD>δ<EFBFBD><CEB4><EFBFBD><EFBFBD>ͼƬ<CDBC><C6AC>Դʱ<D4B4><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƹ<EFBFBD>ͼƬ
	if (!m_bDisplay || !m_pCImage)
	{
		return;
	}
	// <20><><EFBFBD><EFBFBD>ͼƬ
	if (m_pCImage->GetBPP() == 32)
	{
		m_pCImage->AlphaBlend(GetImageHDC(), m_Rect, m_SrcRect, m_nAlpha, AC_SRC_OVER);
	}
	else
	{
		m_pCImage->Draw(GetImageHDC(), m_Rect, m_SrcRect);
	}
}

float Image::getScaleX() const
{
	return m_fScaleX;
}

float Image::getScaleY() const
{
	return m_fScaleY;
}

float Image::getOpacity() const
{
	return m_nAlpha / 255.0f;
}

bool Image::setImage(LPCTSTR ImageFile)
{
	m_pCImage = GetCImage(ImageFile);
	if (m_pCImage)
	{
		reset();
		return true;
	}
	return false;
}

bool Image::setImage(LPCTSTR ImageFile, int x, int y, int width, int height)
{
	if (!setImage(ImageFile))
	{
		return false;
	}
	// <20>ü<EFBFBD>ͼƬ<CDBC><C6AC>С
	crop(x, y, width, height);

	return true;
}

bool Image::setImageFromRes(LPCTSTR pResName)
{
	m_pCImage = GetCImage(pResName, true);
	if (m_pCImage)
	{
		reset();
		return true;
	}
	return false;
}

bool Image::setImageFromRes(LPCTSTR pResName, int x, int y, int width, int height)
{
	if (!setImageFromRes(pResName))
	{
		return false;
	}
	// <20>ü<EFBFBD>ͼƬ<CDBC><C6AC>С
	crop(x, y, width, height);

	return true;
}

void Image::crop(int x, int y, int width, int height)
{
	width = min(max(width, 0), m_pCImage->GetWidth());
	height = min(max(height, 0), m_pCImage->GetHeight());
	// <20><><EFBFBD><EFBFBD>Դ<EFBFBD><D4B4><EFBFBD>ε<EFBFBD>λ<EFBFBD>úʹ<C3BA>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD>ڲü<DAB2><C3BC><EFBFBD>
	m_SrcRect.SetRect(x, y, x + width, y + height);
	// <20><><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD><EFBFBD>Σ<EFBFBD><CEA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD>ڵ<EFBFBD>λ<EFBFBD>úʹ<C3BA>С<EFBFBD><D0A1>
	setSize(int(width * m_fScaleX), int(height * m_fScaleY));
}

void Image::stretch(int width, int height)
{
	// <20><><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD><EFBFBD>ε<EFBFBD>λ<EFBFBD>úʹ<C3BA>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD>ڵ<EFBFBD>λ<EFBFBD>úʹ<C3BA>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͼƬ<CDBC><C6AC>
	setSize(max(width, 0), max(height, 0));
	// <20><><EFBFBD>ñ<EFBFBD><C3B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	m_fScaleX = 1;
	m_fScaleY = 1;
}

void Image::setScale(float scaleX, float scaleY)
{
	m_fScaleX = max(scaleX, 0);
	m_fScaleY = max(scaleY, 0);
	setSize(int(m_SrcRect.Width() * scaleX), int(m_SrcRect.Height() * scaleY));
}

void Image::setOpacity(float value)
{
	if (m_pCImage->GetBPP() == 32)
	{
		m_nAlpha = BYTE(min(max(value, 0), 1) * 255);
	}
}

void Image::setTransparentColor(COLORREF value)
{
	// <20><><EFBFBD><EFBFBD>͸<EFBFBD><CDB8>ɫ
	m_pCImage->SetTransparentColor(value);
}

void Image::reset()
{
	// <20><><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD><EFBFBD>Σ<EFBFBD><CEA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD>ڵ<EFBFBD>λ<EFBFBD>úʹ<C3BA>С<EFBFBD><D0A1>
	setSize(m_pCImage->GetWidth(), m_pCImage->GetHeight());
	// <20><><EFBFBD><EFBFBD>Դ<EFBFBD><D4B4><EFBFBD>Σ<EFBFBD><CEA3><EFBFBD><EFBFBD><EFBFBD>ȡͼƬ<CDBC>Ĵ<EFBFBD>С<EFBFBD><D0A1>
	m_SrcRect.SetRect(0, 0, m_pCImage->GetWidth(), m_pCImage->GetHeight());
	// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	m_fScaleX = 1;
	m_fScaleY = 1;
	// <20><><EFBFBD><EFBFBD>͸<EFBFBD><CDB8><EFBFBD><EFBFBD>
	m_nAlpha = 255;
}

void Image::saveScreenshot()
{
	tstring savePath;
	// <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
	if (FileUtils::getSaveFilePath(savePath, _T("<EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD><EFBFBD>浽"), _T("jpg")))
	{
		// <20><><EFBFBD>洰<EFBFBD>ڽ<EFBFBD>ͼ
		IMAGE image;
		getimage(&image, 0, 0, App::get()->getWidth(), App::get()->getHeight());
		saveimage(savePath.c_str(), &image);
	}
}


// <20><> PNG ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>
void CrossImage(CImage &img)
{
	// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>
	for (int i = 0; i < img.GetWidth(); i++)
	{
		for (int j = 0; j < img.GetHeight(); j++)
		{
			UCHAR *cr = (UCHAR*)img.GetPixelAddress(i, j);
			cr[0] = cr[0] * cr[3] / 255;
			cr[1] = cr[1] * cr[3] / 255;
			cr[2] = cr[2] * cr[3] / 255;
		}
	}
}

CImage* GetCImage(tstring name, bool fromRes)
{
	if (s_mCImages.find(name) == s_mCImages.end())
	{
		CImage* cImage = nullptr;
		// <20><><EFBFBD><EFBFBD>ͼƬ
		if (fromRes)
		{
			cImage = new CImage();
			// <20><><EFBFBD><EFBFBD>Դ<EFBFBD><D4B4><EFBFBD><EFBFBD>ͼƬ<CDBC><C6AC><EFBFBD><EFBFBD>֧<EFBFBD><D6A7> PNG<4E><47>
			cImage->LoadFromResource(GetModuleHandle(NULL), name.c_str());
		}
		else
		{
			//<2F>ж<EFBFBD>ͼƬ·<C6AC><C2B7><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD><EFBFBD>
			if (!PathFileExists(name.c_str()))
			{
				return nullptr;
			}
			cImage = new CImage();
			cImage->Load(name.c_str());
		}
		// <20><><EFBFBD><EFBFBD>ʧ<EFBFBD><CAA7>
		if (!cImage || cImage->IsNull())
		{
			return nullptr;
		}
		// ȷ<>ϸ<EFBFBD>ͼ<EFBFBD><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Alpha ͨ<><CDA8>
		if (cImage->GetBPP() == 32)
		{
			// ͸<><CDB8>ͼƬ<CDBC><C6AC><EFBFBD><EFBFBD>
			CrossImage(*cImage);
		}
		s_mCImages.insert(map<tstring, CImage*>::value_type(name, cImage));
	}
	return s_mCImages.at(name);
}