DrawImage

DrawImage(RasterImage, Point)

在指定位置使用其原始物理尺寸绘制指定图像。

public void DrawImage(RasterImage image, Point location)
范围类型描述
imageRasterImage要绘制的图像。
locationPoint绘制图像左上角的位置。

也可以看看

DrawImage(RasterImage, Rectangle, Rectangle, GraphicsUnit)

在指定位置以指定大小绘制指定图像的指定部分。

public void DrawImage(RasterImage image, Rectangle destRect, Rectangle srcRect, 
    GraphicsUnit srcUnit)
范围类型描述
imageRasterImage要绘制的图像。
destRectRectangle指定绘制图像的位置和大小的矩形结构。图像被缩放以适合矩形。
srcRectRectangle指定要绘制的图像对象部分的矩形结构。
srcUnitGraphicsUnitsrcRect 参数使用的度量单位。

例外

例外（健康）状况
ArgumentOutOfRangeExceptionsrcUnit;仅支持像素单位

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

DrawImage(byte[], Rectangle, GraphicsUnit)

绘制图像。

public void DrawImage(byte[] imageBytes, Rectangle destRect, GraphicsUnit srcUnit)
范围类型描述
imageBytesByte[]图像字节。
destRectRectangle最直接的。
srcUnitGraphicsUnit源单元。

也可以看看

DrawImage(Stream, Rectangle, GraphicsUnit)

绘制图像。

public void DrawImage(Stream stream, Rectangle destRect, GraphicsUnit srcUnit)
范围类型描述
streamStream流。
destRectRectangle最直接的。
srcUnitGraphicsUnit源单元。

也可以看看

DrawEllipse DrawLine