212 lines
		
	
	
		
			3.8 KiB
		
	
	
	
		
			C++
		
	
	
	
			
		
		
	
	
			212 lines
		
	
	
		
			3.8 KiB
		
	
	
	
		
			C++
		
	
	
	
| #include "..\easy2d.h"
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| #include "..\EasyX\easyx.h"
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| 
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| // 对 PNG 图像进行像素转换
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| static void CrossImage(CImage &img);
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| 
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| Image::Image() :
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| 	m_nAlpha(255),
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| 	m_fScaleX(1),
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| 	m_fScaleY(1)
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| {
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| }
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| 
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| Image::Image(LPCTSTR ImageFile) :
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| 	Image()
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| {
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| 	setImage(ImageFile);	// 设置图片资源
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| }
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| 
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| Image::Image(LPCTSTR ImageFile, int x, int y, int width, int height) :
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| 	Image()
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| {
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| 	setImage(ImageFile, x, y, width, height);	// 设置图片资源和裁剪大小
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| }
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| 
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| Image::~Image()
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| {
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| }
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| 
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| void Image::_onDraw()
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| {
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| 	// display 属性为 false,或未设置图片资源时,不绘制该图片
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| 	if (!m_bDisplay || m_Image.IsNull())
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| 	{
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| 		return;
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| 	}
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| 	// 绘制图片
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| 	if (m_Image.GetBPP() == 32)
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| 	{
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| 		m_Image.AlphaBlend(GetImageHDC(), m_Rect, m_SrcRect, m_nAlpha, AC_SRC_OVER);
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| 	}
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| 	else
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| 	{
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| 		m_Image.Draw(GetImageHDC(), m_Rect, m_SrcRect);
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| 	}
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| }
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| 
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| float Image::getScaleX() const
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| {
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| 	return m_fScaleX;
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| }
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| 
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| float Image::getScaleY() const
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| {
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| 	return m_fScaleY;
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| }
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| 
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| float Image::getOpacity() const
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| {
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| 	return m_nAlpha / 255.0f;
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| }
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| 
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| bool Image::setImage(LPCTSTR ImageFile)
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| {
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| 	//判断图片路径是否存在
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| 	if (!PathFileExists(ImageFile))
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| 	{
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| 		return false;
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| 	}
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| 	// 清空原资源
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| 	if (!m_Image.IsNull())
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| 	{
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| 		m_Image.Destroy();
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| 	}
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| 	// 加载图片
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| 	m_Image.Load(ImageFile);
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| 	// 加载失败
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| 	if (m_Image.IsNull())
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| 	{
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| 		return false;
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| 	}
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| 	// 确认该图像包含 Alpha 通道
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| 	if (m_Image.GetBPP() == 32)
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| 	{
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| 		// 透明图片处理
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| 		CrossImage(m_Image);
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| 	}
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| 	reset();
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| 
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| 	return true;
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| }
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| 
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| bool Image::setImage(LPCTSTR ImageFile, int x, int y, int width, int height)
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| {
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| 	if (!setImage(ImageFile))
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| 	{
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| 		return false;
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| 	}
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| 	// 裁剪图片大小
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| 	crop(x, y, width, height);
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| 
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| 	return true;
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| }
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| 
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| bool Image::setImageFromRes(LPCTSTR pResName)
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| {
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| 	// 从资源加载图片(不支持 PNG)
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| 	m_Image.LoadFromResource(GetModuleHandle(NULL), pResName);
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| 	// 加载失败
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| 	if (m_Image.IsNull())
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| 	{
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| 		return false;
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| 	}
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| 	reset();
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| 
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| 	return true;
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| }
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| 
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| bool Image::setImageFromRes(LPCTSTR pResName, int x, int y, int width, int height)
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| {
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| 	if (!setImageFromRes(pResName))
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| 	{
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| 		return false;
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| 	}
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| 	// 裁剪图片大小
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| 	crop(x, y, width, height);
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| 
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| 	return true;
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| }
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| 
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| void Image::crop(int x, int y, int width, int height)
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| {
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| 	width = min(max(width, 0), m_Image.GetWidth());
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| 	height = min(max(height, 0), m_Image.GetHeight());
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| 	// 设置源矩形的位置和大小(用于裁剪)
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| 	m_SrcRect.SetRect(x, y, x + width, y + height);
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| 	// 设置目标矩形(即绘制到窗口的位置和大小)
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| 	setSize(int(width * m_fScaleX), int(height * m_fScaleY));
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| }
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| 
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| void Image::stretch(int width, int height)
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| {
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| 	// 设置目标矩形的位置和大小(即绘制到窗口的位置和大小,用于拉伸图片)
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| 	setSize(max(width, 0), max(height, 0));
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| 	// 重置比例缩放属性
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| 	m_fScaleX = 1;
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| 	m_fScaleY = 1;
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| }
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| 
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| void Image::setScale(float scaleX, float scaleY)
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| {
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| 	m_fScaleX = max(scaleX, 0);
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| 	m_fScaleY = max(scaleY, 0);
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| 	setSize(int(m_SrcRect.Width() * scaleX), int(m_SrcRect.Height() * scaleY));
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| }
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| 
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| void Image::setOpacity(float value)
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| {
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| 	if (m_Image.GetBPP() == 32)
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| 	{
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| 		m_nAlpha = BYTE(min(max(value, 0), 1) * 255);
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| 	}
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| }
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| 
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| void Image::setTransparentColor(COLORREF value)
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| {
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| 	// 设置透明色
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| 	m_Image.SetTransparentColor(value);
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| }
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| 
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| void Image::reset()
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| {
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| 	// 设置目标矩形(即绘制到窗口的位置和大小)
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| 	setSize(m_Image.GetWidth(), m_Image.GetHeight());
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| 	// 设置源矩形(即截取图片的大小)
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| 	m_SrcRect.SetRect(0, 0, m_Image.GetWidth(), m_Image.GetHeight());
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| 	// 重置缩放属性
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| 	m_fScaleX = 1;
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| 	m_fScaleY = 1;
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| 	// 重置透明度
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| 	m_nAlpha = 255;
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| }
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| 
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| void Image::saveScreenshot()
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| {
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| 	tstring savePath;
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| 	// 获取保存位置
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| 	if (FileUtils::getSaveFilePath(savePath, _T("截图保存到"), _T("jpg")))
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| 	{
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| 		// 保存窗口截图
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| 		IMAGE image;
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| 		getimage(&image, 0, 0, App::get()->getWidth(), App::get()->getHeight());
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| 		saveimage(savePath.c_str(), &image);
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| 	}
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| }
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| 
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| 
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| // 对 PNG 图像进行像素转换
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| void CrossImage(CImage &img)
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| {
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| 	// 进行像素转换
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| 	for (int i = 0; i < img.GetWidth(); i++)
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| 	{
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| 		for (int j = 0; j < img.GetHeight(); j++)
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| 		{
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| 			UCHAR *cr = (UCHAR*)img.GetPixelAddress(i, j);
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| 			cr[0] = cr[0] * cr[3] / 255;
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| 			cr[1] = cr[1] * cr[3] / 255;
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| 			cr[2] = cr[2] * cr[3] / 255;
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| 		}
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| 	}
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| } |