//渲染图片核心方法
private void RenderImageCore(LayoutData layout)
{
layout.DoLayout(); //执行布局
this.CurrentImagePreferredRect = layout.OutImageBounds; //保存图片区域矩形
bool needRotate = !(float.IsNaN(this.m_ImageRotateAngle) || this.m_ImageRotateAngle % 360f == 0f); //是否需要旋转
Rectangle imageBounds = needRotate ? RenderEngine.RotateRect(this.m_Graphics, this.CurrentImagePreferredRect, this.m_ImageRotateAngle, false) : this.CurrentImagePreferredRect; //新绘图区域(如果旋转则为旋转后的区域)
//开始绘制
if (this.m_State == State.Disabled && this.m_ImageGrayOnDisabled)
{
using (Image grayImg = RenderEngine.GetGrayImage(this.CurrentImage))
{
this.m_Graphics.DrawImage(grayImg, imageBounds);
}
}
else
{
this.m_Graphics.DrawImage(this.CurrentImage, imageBounds);
}
//恢复旋转
if (needRotate)
{
this.m_Graphics.ResetTransform();
}
}
//渲染文本核心方法
private void RenderTextCore(LayoutData layout)
{
layout.DoLayout(); //执行布局
this.CurrentTextPreferredRect = layout.OutTextBounds; //保存文本区域矩形
bool needRotate = !(Single.IsNaN(this.m_TextRotateAngle) || this.m_TextRotateAngle % 360f == 0f); //是否需要旋转
Rectangle textRect = needRotate ? RenderEngine.RotateRect(this.m_Graphics, this.CurrentTextPreferredRect, this.m_TextRotateAngle, false) : this.CurrentTextPreferredRect; //新绘图区域(如果旋转则为旋转后的区域)
//绘制阴影或描边
if (this.m_TextShadowShapeStyle != 0)
{
using (new SmoothingModeGraphics(this.m_Graphics, SmoothingMode.AntiAlias))
{
using (GraphicsPath textPath = new GraphicsPath())
{
//添加文本
textPath.AddString(this.m_Text, this.m_Font.FontFamily, (int)this.m_Font.Style, this.m_Graphics.DpiY * this.m_Font.SizeInPoints / 72f, textRect, layout.CurrentStringFormat);
//绘制阴影和阴影描边
if (((this.m_TextShadowShapeStyle & ShadowShapeStyle.Shadow) != 0) || ((this.m_TextShadowShapeStyle & ShadowShapeStyle.ShapeOfShadow) != 0 && this.m_TextShapeOfShadowWidth > 0f))
{
using (GraphicsPath shadowPath = textPath.Clone() as GraphicsPath)
{
using (Matrix shadowMatrix = new Matrix(1, 0, 0, 1, this.m_TextShadowMatrixOffset.X, this.m_TextShadowMatrixOffset.Y))
{
shadowPath.Transform(shadowMatrix);
}
//绘制阴影
if ((this.m_TextShadowShapeStyle & ShadowShapeStyle.Shadow) != 0)
{
using (Brush shadowBrush = new SolidBrush(this.m_TextShadowColor))
{
this.m_Graphics.FillPath(shadowBrush, shadowPath);
}
}
//阴影描边
if ((this.m_TextShadowShapeStyle & ShadowShapeStyle.ShapeOfShadow) != 0 && this.m_TextShapeOfShadowWidth > 0f)
{
using (Pen shapeOfShadowPen = new Pen(this.m_TextShapeOfShadowColor, this.m_TextShapeOfShadowWidth))
{
this.m_Graphics.DrawPath(shapeOfShadowPen, shadowPath);
}
}
}
}
//绘制文本
using (Brush textBrush = new SolidBrush(this.CurrentForeColor))
{
this.m_Graphics.FillPath(textBrush, textPath);
}
//文本描边
if ((this.m_TextShadowShapeStyle & ShadowShapeStyle.ShapeOfText) != 0 && this.m_TextShapeOfTextWidth > 0f)
{
using (Pen shapeOfTextPen = new Pen(this.m_TextShapeOfTextColor, this.m_TextShapeOfTextWidth))
{
this.m_Graphics.DrawPath(shapeOfTextPen, textPath);
}
}
}
}
}
else
{
using (new TextRenderingHintGraphics(this.m_Graphics, this.m_TextRenderingHint))
{
using (Brush textBrush = new SolidBrush(this.CurrentForeColor))
{
this.m_Graphics.DrawString(this.m_Text, this.m_Font, textBrush, textRect, layout.CurrentStringFormat);
}
}
}
//恢复旋转
if (needRotate)
{
this.m_Graphics.ResetTransform();
}
}
