DrawArc
MetafileRecorderGraphics2D.DrawArc method
绘制表示由 Rectangle 结构指定的椭圆的一部分的圆弧。
public void DrawArc(Pen pen, Rectangle rect, float startAngle, float arcAngle)
范围 | 类型 | 描述 |
---|---|---|
pen | Pen | 确定图形颜色、宽度和样式的钢笔。 |
rect | Rectangle | 椭圆的边界。 |
startAngle | Single | 从 x 轴到圆弧起点顺时针测量的角度(以度为单位)。 |
arcAngle | Single | 从 startAngle 参数到圆弧终点顺时针测量的角度(以度为单位)。 |
例子
此示例说明如何使用 WmfRecorderGraphics2D 创建 WMF 图像并绘制一些几何形状。
[C#]
string dir = "c:\\temp\\";
int imageWidth = 600;
int imageHeight = 400;
// 这是默认的屏幕分辨率。
int dpi = 96;
Aspose.Imaging.Rectangle frame = new Aspose.Imaging.Rectangle(0, 0, imageWidth, imageHeight);
// 创建一个 WMF 图像。
Aspose.Imaging.FileFormats.Wmf.Graphics.WmfRecorderGraphics2D graphics =
new Aspose.Imaging.FileFormats.Wmf.Graphics.WmfRecorderGraphics2D(frame, dpi);
// 使用 1 像素宽的黑色笔沿图像边框绘制一个黑色矩形。
graphics.DrawRectangle(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Black, 1), 0, 0, imageWidth, imageHeight);
// 用白色烟雾填充一个矩形。
graphics.FillRectangle(new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.WhiteSmoke), new Aspose.Imaging.Rectangle(10, 10, 580, 380));
// 使用 1 像素宽的深绿色笔绘制两条对角线。
graphics.DrawLine(new Aspose.Imaging.Pen(Aspose.Imaging.Color.DarkGreen, 1), 0, 0, imageWidth, imageHeight);
graphics.DrawLine(new Aspose.Imaging.Pen(Aspose.Imaging.Color.DarkGreen, 1), 0, imageHeight, imageWidth, 0);
// 使用 2 像素宽的蓝色笔在矩形 {0, 0, 200, 200} 内绘制弧线。
graphics.DrawArc(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Blue, 2), new Aspose.Imaging.Rectangle(0, 0, 200, 200), 90, 270);
// 填充圆弧
graphics.FillPie(new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.LightSkyBlue), new Aspose.Imaging.Rectangle(0, 0, 150, 150), 90, 270);
// 使用 2 像素宽的红笔绘制三次贝塞尔曲线。
graphics.DrawCubicBezier(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Red, 2),
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(200, 133),
new Aspose.Imaging.Point(400, 166),
new Aspose.Imaging.Point(600, 400));
// 在指定位置绘制指定大小的光栅图像。
// 图像被缩放以适合所需的矩形。
using (Aspose.Imaging.RasterImage imageToDraw = (Aspose.Imaging.RasterImage)Aspose.Imaging.Image.Load(dir + "sample.bmp"))
{
graphics.DrawImage(imageToDraw,
new Aspose.Imaging.Rectangle(400, 200, 100, 50),
new Aspose.Imaging.Rectangle(0, 0, imageWidth, imageHeight),
Aspose.Imaging.GraphicsUnit.Pixel);
}
// 绘制一个文本字符串
graphics.DrawString("Hello World!", new Aspose.Imaging.Font("Arial", 48, Aspose.Imaging.FontStyle.Regular), Aspose.Imaging.Color.DarkRed, 200, 300);
// 创建要填充的路径
Aspose.Imaging.Figure figureToFill = new Aspose.Imaging.Figure();
figureToFill.IsClosed = true;
Aspose.Imaging.GraphicsPath pathToFill = new Aspose.Imaging.GraphicsPath();
pathToFill.AddFigure(figureToFill);
figureToFill.AddShapes(new Shape[]
{
new Aspose.Imaging.Shapes.ArcShape(new Aspose.Imaging.Rectangle(400, 0, 200, 100), 45, 300),
new Aspose.Imaging.Shapes.BezierShape(
new Aspose.Imaging.PointF[]
{
new Aspose.Imaging.PointF(300, 200),
new Aspose.Imaging.PointF(400, 200),
new Aspose.Imaging.PointF(500, 100),
new Aspose.Imaging.PointF(600, 200),
}),
new Aspose.Imaging.Shapes.PolygonShape(
new Aspose.Imaging.PointF[]
{
new Aspose.Imaging.PointF(300, 100),
}),
new Aspose.Imaging.Shapes.RectangleShape(new Aspose.Imaging.RectangleF(0, 100, 200, 200)),
});
// 使用黄色画笔和绿色笔填充路径以绘制轮廓
graphics.FillPath(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Green, 2), new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.Yellow), pathToFill);
// 创建绘制路径
Aspose.Imaging.GraphicsPath pathToDraw = new Aspose.Imaging.GraphicsPath();
Aspose.Imaging.Figure figureToDraw = new Aspose.Imaging.Figure();
pathToDraw.AddFigure(figureToDraw);
figureToDraw.AddShapes(new Aspose.Imaging.Shape[]
{
new Aspose.Imaging.Shapes.ArcShape(new Aspose.Imaging.RectangleF(200, 200, 200, 200), 0, 360),
});
// 使用 5 像素宽的橙色笔绘制路径。
graphics.DrawPath(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Orange, 5), pathToDraw);
// 为了光栅化 SVG,我们需要指定光栅化选项。
Aspose.Imaging.ImageOptions.SvgRasterizationOptions rasterizationOptions = new Aspose.Imaging.ImageOptions.SvgRasterizationOptions();
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
saveOptions.VectorRasterizationOptions = rasterizationOptions;
// 获取包含所有绘图命令的最终 WMF 图像
using (Aspose.Imaging.FileFormats.Wmf.WmfImage wmfImage = graphics.EndRecording())
{
wmfImage.Save(dir + "test.output.wmf");
}
此示例说明如何使用 EmfRecorderGraphics2D 创建 EMF 图像并在其上绘制一些几何形状。
[C#]
string dir = "c:\\temp\\";
// 图像大小(以像素为单位)
int deviceWidth = 600;
int deviceHeight = 400;
// 以毫米为单位的图像大小
int deviceWidthMm = (int)(deviceWidth / 100f);
int deviceHeightMm = (int)(deviceHeight / 100f);
Aspose.Imaging.Rectangle frame = new Aspose.Imaging.Rectangle(0, 0, deviceWidth, deviceHeight);
// 创建一个 EMF 图像。
Aspose.Imaging.FileFormats.Emf.Graphics.EmfRecorderGraphics2D graphics =
new Aspose.Imaging.FileFormats.Emf.Graphics.EmfRecorderGraphics2D(
frame,
new Aspose.Imaging.Size(deviceWidth, deviceHeight),
new Aspose.Imaging.Size(deviceWidthMm, deviceHeightMm));
// 使用 1 像素宽的黑色笔沿图像边框绘制一个黑色矩形。
graphics.DrawRectangle(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Black, 1), 0, 0, deviceWidth, deviceHeight);
// 用白色烟雾填充一个矩形。
graphics.FillRectangle(new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.WhiteSmoke), new Aspose.Imaging.Rectangle(10, 10, 580, 380));
// 使用 1 像素宽的深绿色笔绘制两条对角线。
graphics.DrawLine(new Aspose.Imaging.Pen(Aspose.Imaging.Color.DarkGreen, 1), 0, 0, deviceWidth, deviceHeight);
graphics.DrawLine(new Aspose.Imaging.Pen(Aspose.Imaging.Color.DarkGreen, 1), 0, deviceHeight, deviceWidth, 0);
// 使用 2 像素宽的蓝色笔在矩形 {0, 0, 200, 200} 内绘制弧线。
graphics.DrawArc(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Blue, 2), new Aspose.Imaging.Rectangle(0, 0, 200, 200), 90, 270);
// 填充圆弧
graphics.FillPie(new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.LightSkyBlue), new Aspose.Imaging.Rectangle(0, 0, 150, 150), 90, 270);
// 使用 2 像素宽的红笔绘制三次贝塞尔曲线。
graphics.DrawCubicBezier(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Red, 2),
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(200, 133),
new Aspose.Imaging.Point(400, 166),
new Aspose.Imaging.Point(600, 400));
// 在指定位置绘制指定大小的光栅图像。
// 图像被缩放以适合所需的矩形。
using (Aspose.Imaging.RasterImage imageToDraw = (Aspose.Imaging.RasterImage)Aspose.Imaging.Image.Load(dir + "sample.bmp"))
{
graphics.DrawImage(imageToDraw,
new Aspose.Imaging.Rectangle(400, 200, 100, 50),
new Aspose.Imaging.Rectangle(0, 0, deviceWidth, deviceHeight),
Aspose.Imaging.GraphicsUnit.Pixel);
}
// 绘制一个文本字符串
graphics.DrawString("Hello World!", new Aspose.Imaging.Font("Arial", 48, Aspose.Imaging.FontStyle.Regular), Aspose.Imaging.Color.DarkRed, 200, 300);
// 创建要填充的路径
Aspose.Imaging.Figure figureToFill = new Aspose.Imaging.Figure();
figureToFill.IsClosed = true;
Aspose.Imaging.GraphicsPath pathToFill = new Aspose.Imaging.GraphicsPath();
pathToFill.AddFigure(figureToFill);
figureToFill.AddShapes(new Shape[]
{
new Aspose.Imaging.Shapes.ArcShape(new Aspose.Imaging.Rectangle(400, 0, 200, 100), 45, 300),
new Aspose.Imaging.Shapes.BezierShape(
new Aspose.Imaging.PointF[]
{
new Aspose.Imaging.PointF(300, 200),
new Aspose.Imaging.PointF(400, 200),
new Aspose.Imaging.PointF(500, 100),
new Aspose.Imaging.PointF(600, 200),
}),
new Aspose.Imaging.Shapes.PolygonShape(
new Aspose.Imaging.PointF[]
{
new Aspose.Imaging.PointF(300, 100),
}),
new Aspose.Imaging.Shapes.RectangleShape(new Aspose.Imaging.RectangleF(0, 100, 200, 200)),
});
// 使用黄色画笔和绿色笔填充路径以绘制轮廓
graphics.FillPath(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Green, 2), new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.Yellow), pathToFill);
// 创建绘制路径
Aspose.Imaging.GraphicsPath pathToDraw = new Aspose.Imaging.GraphicsPath();
Aspose.Imaging.Figure figureToDraw = new Aspose.Imaging.Figure();
pathToDraw.AddFigure(figureToDraw);
figureToDraw.AddShapes(new Aspose.Imaging.Shape[]
{
new Aspose.Imaging.Shapes.ArcShape(new Aspose.Imaging.RectangleF(200, 200, 200, 200), 0, 360),
});
// 使用 5 像素宽的橙色笔绘制路径。
graphics.DrawPath(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Orange, 5), pathToDraw);
// 为了光栅化 SVG,我们需要指定光栅化选项。
Aspose.Imaging.ImageOptions.SvgRasterizationOptions rasterizationOptions = new Aspose.Imaging.ImageOptions.SvgRasterizationOptions();
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
saveOptions.VectorRasterizationOptions = rasterizationOptions;
// 获取包含所有绘图命令的最终 WMF 图像
using (Aspose.Imaging.FileFormats.Emf.EmfImage emfImage = graphics.EndRecording())
{
emfImage.Save(dir + "test.output.emf");
}
也可以看看
- class Pen
- struct Rectangle
- class MetafileRecorderGraphics2D
- 命名空间 Aspose.Imaging.FileFormats.Emf.Graphics
- 部件 Aspose.Imaging