新增Sprite裁剪函数，修复了最小化窗口时cpu占用高的bug

Easy2D/Base/EApp.cpp

@@ -254,10 +254,11 @@ void e2d::EApp::_mainLoop()
 	// 判断间隔时间是否足够
 	if (nInterval >= nAnimationInterval)
 	{
+		// 记录当前时间
+		tLast = GetNow();
+
 		if (!m_bPaused)
 		{
-			// 记录当前时间
-			tLast = GetNow();
 			// 游戏控制流程
 			_onControl();
 			// 刷新游戏画面

Easy2D/Node/ENode.cpp

@@ -164,13 +164,13 @@ void e2d::ENode::_updateTransformToReal()
 {
 	// 计算锚点坐标
 	D2D1_POINT_2F anchorPos = D2D1::Point2F(
-		m_Size.width * m_fAnchorX,
+		getRealWidth() * m_fAnchorX,
-		m_Size.height * m_fAnchorY
+		getRealHeight() * m_fAnchorY
 	);
 	// 计算左上角坐标
 	D2D1_POINT_2F upperLeftCorner = D2D1::Point2F(
-		m_Pos.x - m_Size.width * m_fAnchorX,
+		m_Pos.x - getRealWidth() * m_fAnchorX,
-		m_Pos.y - m_Size.height * m_fAnchorY
+		m_Pos.y - getRealHeight() * m_fAnchorY
 	);
 	// 二维矩形变换
 	m_Matri = D2D1::Matrix3x2F::Scale(

Easy2D/Node/ESprite.cpp

@@ -28,6 +28,11 @@ static ID2D1Bitmap * GetBitmapFromResource(const e2d::EString & resourceName, co
 
 
 e2d::ESprite::ESprite()
+	: m_pBitmap(nullptr)
+	, m_fSourcePosX(0)
+	, m_fSourcePosY(0)
+	, m_fSourceWidth(0)
+	, m_fSourceHeight(0)
 {
 }
 
@@ -37,12 +42,66 @@ e2d::ESprite::ESprite(const EString & imageFileName)
 	setImage(imageFileName);
 }
 
+e2d::ESprite::ESprite(const EString & imageFileName, float x, float y, float width, float height)
+{
+	setImage(imageFileName);
+	clipImage(x, y, width, height);
+}
+
 e2d::ESprite::ESprite(const EString & resourceName, const EString & resourceType)
 	: ESprite()
 {
 	setImage(resourceName, resourceType);
 }
 
+e2d::ESprite::ESprite(const EString & resourceName, const EString & resourceType, float x, float y, float width, float height)
+{
+	setImage(resourceName, resourceType);
+	clipImage(x, y, width, height);
+}
+
+float e2d::ESprite::getWidth() const
+{
+	return m_fSourceWidth * m_fScaleX;
+}
+
+float e2d::ESprite::getHeight() const
+{
+	return m_fSourceHeight * m_fScaleY;
+}
+
+e2d::ESize e2d::ESprite::getSize() const
+{
+	return ESize(getWidth(), getHeight());
+}
+
+float e2d::ESprite::getRealWidth() const
+{
+	return m_fSourceWidth;
+}
+
+float e2d::ESprite::getRealHeight() const
+{
+	return m_fSourceHeight;
+}
+
+e2d::ESize e2d::ESprite::getRealSize() const
+{
+	return ESize(m_fSourceWidth, m_fSourceHeight);
+}
+
+void e2d::ESprite::setWidth(float)
+{
+}
+
+void e2d::ESprite::setHeight(float)
+{
+}
+
+void e2d::ESprite::setSize(float, float)
+{
+}
+
 void e2d::ESprite::setImage(const EString & fileName)
 {
 	WARN_IF(fileName.empty(), "ESprite cannot load bitmap from NULL file name.");
@@ -52,12 +111,20 @@ void e2d::ESprite::setImage(const EString & fileName)
 
 	m_sFileName = fileName;
 
-	SafeReleaseInterface(&pBitmap);
+	SafeReleaseInterface(&m_pBitmap);
-	pBitmap = GetBitmapFromFile(m_sFileName);
+	m_pBitmap = GetBitmapFromFile(m_sFileName);
 
-	ASSERT(pBitmap, "ESprite create device resources failed!");
+	ASSERT(m_pBitmap, "ESprite create device resources failed!");
 
-	this->setSize(pBitmap->GetSize().width, pBitmap->GetSize().height);
+	m_fSourcePosX = m_fSourcePosY = 0;
+	m_fSourceWidth = m_pBitmap->GetSize().width;
+	m_fSourceHeight = m_pBitmap->GetSize().height;
+}
+
+void e2d::ESprite::setImage(const EString & fileName, float x, float y, float width, float height)
+{
+	setImage(fileName);
+	clipImage(x, y, width, height);
 }
 
 void e2d::ESprite::setImage(const EString & resourceName, const EString & resourceType)
@@ -76,23 +143,41 @@ void e2d::ESprite::setImage(const EString & resourceName, const EString & resour
 	m_sResourceName = resourceName;
 	m_sResourceType = resourceType;
 
-	SafeReleaseInterface(&pBitmap);
+	SafeReleaseInterface(&m_pBitmap);
-	pBitmap = GetBitmapFromResource(resourceName, resourceType);
+	m_pBitmap = GetBitmapFromResource(resourceName, resourceType);
 
-	ASSERT(pBitmap, "ESprite create device resources failed!");
+	ASSERT(m_pBitmap, "ESprite create device resources failed!");
 
-	this->setSize(pBitmap->GetSize().width, pBitmap->GetSize().height);
+	m_fSourcePosX = m_fSourcePosY = 0;
+	m_fSourceWidth = m_pBitmap->GetSize().width;
+	m_fSourceHeight = m_pBitmap->GetSize().height;
+}
+
+void e2d::ESprite::setImage(const EString & resourceName, const EString & resourceType, float x, float y, float width, float height)
+{
+	setImage(resourceName, resourceType);
+	clipImage(x, y, width, height);
+}
+
+void e2d::ESprite::clipImage(float x, float y, float width, float height)
+{
+	m_fSourcePosX = max(x, 0);
+	m_fSourcePosY = max(y, 0);
+	m_fSourceWidth = min(max(width, 0), m_pBitmap->GetSize().width - m_fSourcePosX);
+	m_fSourceHeight = min(max(height, 0), m_pBitmap->GetSize().width - m_fSourcePosX);
 }
 
 void e2d::ESprite::_onRender()
 {
-	if (pBitmap)
+	if (m_pBitmap)
 	{
 		// Draw bitmap
 		GetRenderTarget()->DrawBitmap(
-			pBitmap,
+			m_pBitmap,
-			D2D1::RectF(0, 0, getRealWidth(), getRealHeight()),
+			D2D1::RectF(0, 0, m_fSourceWidth, m_fSourceHeight),
-			m_fDisplayOpacity
+			m_fDisplayOpacity,
+			D2D1_BITMAP_INTERPOLATION_MODE_LINEAR,
+			D2D1::RectF(m_fSourcePosX, m_fSourcePosY, m_fSourceWidth, m_fSourceHeight)
 		);
 	}
 }

Easy2D/ecommon.h

@@ -26,6 +26,16 @@ struct EPoint
 		this->y = y;
 	}
 
+	EPoint operator + (EPoint const & p)
+	{
+		return EPoint(x + p.x, y + p.y);
+	}
+
+	EPoint operator - (EPoint const & p)
+	{
+		return EPoint(x - p.x, y - p.y);
+	}
+
 	float x;
 	float y;
 };
@@ -46,6 +56,16 @@ struct ESize
 		this->height = height;
 	}
 
+	ESize operator + (ESize const & size)
+	{
+		return ESize(width + size.width, height + size.height);
+	}
+
+	ESize operator - (ESize const & size)
+	{
+		return ESize(width - size.width, height - size.height);
+	}
+
 	float width;
 	float height;
 };

Easy2D/emacros.h

@@ -52,5 +52,8 @@
 #endif
 
 
+#define DEPRECATED_ATTRIBUTE __declspec(deprecated)
+
+
 template<typename T>
 inline void SafeDelete(T** p) { if (*p) { delete *p; *p = nullptr; } }

Easy2D/enodes.h

@@ -368,23 +368,96 @@ public:
 		const EString & imageFileName
 	);
 
+	// 从文件图片创建精灵并裁剪
+	ESprite(
+		const EString & imageFileName,
+		float x,
+		float y,
+		float width,
+		float height
+	);
+
 	// 从资源图片创建精灵
 	ESprite(
 		const EString & resourceName,
 		const EString & resourceType
 	);
 
+	// 从资源图片创建精灵并裁剪
+	ESprite(
+		const EString & resourceName,
+		const EString & resourceType,
+		float x,
+		float y,
+		float width,
+		float height
+	);
+
+	// 获取精灵宽度
+	virtual float getWidth() const override;
+
+	// 获取精灵高度
+	virtual float getHeight() const override;
+
+	// 获取精灵大小
+	virtual ESize getSize() const override;
+
+	// 获取精灵宽度（不考虑缩放）
+	virtual float getRealWidth() const override;
+
+	// 获取精灵高度（不考虑缩放）
+	virtual float getRealHeight() const override;
+
+	// 获取精灵大小（不考虑缩放）
+	virtual ESize getRealSize() const override;
+
+	// 设置精灵宽度是失效的
+	virtual void setWidth(float) override;
+
+	// 设置精灵高度是失效的
+	virtual void setHeight(float) override;
+
+	// 设置精灵大小是失效的
+	virtual void setSize(float, float) override;
+	
 	// 从文件加载图片
 	void setImage(
 		const EString & fileName
 	);
 
+	// 从文件加载图片并裁剪
+	void setImage(
+		const EString & fileName,
+		float x,
+		float y,
+		float width,
+		float height
+	);
+
 	// 从资源加载图片
 	void setImage(
 		const EString & resourceName,
 		const EString & resourceType
 	);
 
+	// 从资源加载图片并裁剪
+	void setImage(
+		const EString & resourceName,
+		const EString & resourceType,
+		float x,
+		float y,
+		float width,
+		float height
+	);
+
+	// 裁剪原图片
+	void clipImage(
+		float x,
+		float y,
+		float width,
+		float height
+	);
+
 	// 预加载资源
 	static bool preloadImage(
 		const EString & fileName
@@ -404,10 +477,14 @@ protected:
 	virtual void _onRender() override;
 
 protected:
+	float	m_fSourcePosX;
+	float	m_fSourcePosY;
+	float	m_fSourceWidth;
+	float	m_fSourceHeight;
 	EString m_sFileName;
 	EString m_sResourceName;
 	EString m_sResourceType;
-	ID2D1Bitmap * pBitmap;
+	ID2D1Bitmap * m_pBitmap;
 };
 
 }