DrawString

DrawString(string, Font, Color, int, int)

绘制字符串。

public void DrawString(string @string, Font font, Color color, int x, int y)

范围	类型	描述
string	String	字符串。
font	Font	定义字符串文本格式的字体。
color	Color	文字颜色。
x	Int32	绘制文本左上角的 x 坐标。
y	Int32	绘制文本左上角的 y 坐标。

例子

此示例显示如何从文件加载 EMF 图像并在其上绘制文本字符串。

[C#]

string dir = "c:\\temp\\";

using (Aspose.Imaging.FileFormats.Emf.EmfImage emfImage = (Aspose.Imaging.FileFormats.Emf.EmfImage)Aspose.Imaging.Image.Load(dir + "test.emf"))
{
    Aspose.Imaging.FileFormats.Emf.Graphics.EmfRecorderGraphics2D graphics =
        Aspose.Imaging.FileFormats.Emf.Graphics.EmfRecorderGraphics2D.FromEmfImage(emfImage);

    // 首先，获取图片大小
    int width = emfImage.Width;
    int height = emfImage.Height;

    // 其次，计算一个变换，沿着图像的主对角线放置一个文本字符串 -
    // 从左上角到右下角。
    float emFontSize = 96f;
    float d = (float)System.Math.Sqrt(width * width + height * height);
    float scaleFactor = d / (emFontSize * 5f);

    float tan = ((float)height) / width;                
    double radians = System.Math.Atan(tan);
    double degrees = (180 * radians) / System.Math.PI;

    Aspose.Imaging.Matrix transform = new Aspose.Imaging.Matrix();
    transform.Rotate((float)degrees);
    transform.Scale(scaleFactor, scaleFactor);

    // 然后，设置变换。
    graphics.SetTransform(transform);

    // 最后，沿主对角线放置一个水印（粉红色的文本字符串）。
    graphics.DrawString("WATERMARK", new Aspose.Imaging.Font("Courier New", emFontSize), Aspose.Imaging.Color.LightPink, 0, 0/*, (float)degrees*/);

    // 将带水印的图像保存到另一个 EMF 文件中。
    using (Aspose.Imaging.FileFormats.Emf.EmfImage scaledEmfImage = graphics.EndRecording())
    {
        scaledEmfImage.Save(dir + "test.scaled.emf");
    }
}

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 Font
struct Color
class MetafileRecorderGraphics2D
命名空间 Aspose.Imaging.FileFormats.Emf.Graphics
部件 Aspose.Imaging

DrawString(string, Font, Color, int, int, float)

绘制字符串。

public void DrawString(string @string, Font font, Color color, int x, int y, float angle)

范围	类型	描述
string	String	字符串。
font	Font	定义字符串文本格式的字体。
color	Color	文字颜色。
x	Int32	绘制文本左上角的 x 坐标。
y	Int32	绘制文本左上角的 y 坐标。
angle	Single	擒纵矢量与装置 x 轴之间的角度，以度为单位。擒纵矢量平行于一行文本的基线。

也可以看看

class Font
struct Color
class MetafileRecorderGraphics2D
命名空间 Aspose.Imaging.FileFormats.Emf.Graphics
部件 Aspose.Imaging

DrawRectangle ExcludeClip