Python实现在PDF中绘制线条、矩形和自定义图形

pip install Spire.PDF

from spire.pdf.common import *
from spire.pdf import *

# 创建 PDF 文档
doc = PdfDocument()
page = doc.Pages.Add()

# 保存画布状态
state = page.Canvas.Save()

# 创建画笔（黑色，线宽 1 点）
pen = PdfPen(PdfRGBColor(Color.get_Black()), 1.0)

# 绘制一条从 (50, 100) 到 (400, 100) 的水平线
page.Canvas.DrawLine(pen, 50.0, 100.0, 400.0, 100.0)

# 绘制一条从 (50, 100) 到 (225, 300) 的斜线
pen2 = PdfPen(PdfRGBColor(Color.get_Red()), 1.0)
page.Canvas.DrawLine(pen2, 50.0, 100.0, 225.0, 300.0)

# 恢复画布状态
page.Canvas.Restore(state)

# 保存文档
doc.SaveToFile("DrawLines.pdf")
doc.Close()

# 创建红色画笔，线宽 3 点
pen = PdfPen(PdfRGBColor(Color.get_Red()), 3.0)

# 设置虚线样式
pen.DashStyle = PdfDashStyle.Dash
pen.DashPattern = [1, 4, 1]  # 虚线模式：1点实线、4点空白、1点实线

# 绘制虚线
page.Canvas.DrawLine(pen, 50.0, 200.0, 400.0, 200.0)

# 绘制矩形边框
pen = PdfPen(PdfRGBColor(Color.get_Black()), 0.5)
# 参数：画笔、x、y、宽度、高度
page.Canvas.DrawRectangle(pen, 100.0, 150.0, 200.0, 120.0)

# 绘制带填充色的矩形
pen2 = PdfPen(PdfRGBColor(Color.get_Black()), 1.0)
brush = PdfSolidBrush(PdfRGBColor(Color.get_OrangeRed()))
rect = RectangleF(PointF(100.0, 300.0), SizeF(200.0, 120.0))
page.Canvas.DrawRectangle(pen2, brush, rect)

# 绘制椭圆边框（以矩形边界定义椭圆范围）
pen = PdfPen(PdfRGBColor(Color.get_CadetBlue()), 1.0)
# 参数定义外接矩形的范围，椭圆会被绘制在该矩形内部
page.Canvas.DrawEllipse(pen, 220.0, 320.0, 100.0, 90.0)

# 绘制填充椭圆
brush = PdfSolidBrush(PdfRGBColor(Color.get_CadetBlue()))
page.Canvas.DrawEllipse(brush, 380.0, 325.0, 80.0, 80.0)

# 第三个和第四个参数分别控制水平半径和垂直半径
# 当两者相等时即为正圆
page.Canvas.DrawEllipse(brush, 100.0, 450.0, 50.0, 50.0)  # 这行会绘制一个正圆

import math

# 计算五边形的五个顶点
points = [None] * 5
for i in range(5):
    x = float(math.cos(i * 2 * math.pi / 5))
    y = float(math.sin(i * 2 * math.pi / 5))
    points[i] = PointF(x, y)

# 创建路径并添加线段
path = PdfPath()
path.AddLine(points[2], points[0])
path.AddLine(points[0], points[3])
path.AddLine(points[3], points[1])
path.AddLine(points[1], points[4])
path.AddLine(points[4], points[2])

# 绘制路径轮廓
pen = PdfPen(PdfRGBColor(Color.get_DeepSkyBlue()), 0.02)
page.Canvas.ScaleTransform(50.0, 50.0)
page.Canvas.TranslateTransform(5.0, 5.0)
page.Canvas.DrawPath(pen, path)

# 绘制填充路径
brush = PdfSolidBrush(PdfRGBColor(Color.get_DeepSkyBlue()))
page.Canvas.DrawPath(pen, brush, path)

# 设置透明度（参数范围 0.0~1.0，0.0 完全透明，1.0 不透明）
page.Canvas.SetTransparency(0.5, 0.5)

# 在此之后绘制的图形将以 50% 透明度显示
pen = PdfPen(PdfRGBColor(Color.get_Black()), 1.0)
brush = PdfSolidBrush(PdfRGBColor(Color.get_Red()))
page.Canvas.DrawRectangle(pen, brush, RectangleF(PointF(200.0, 300.0), SizeF(200.0, 100.0)))

# 设置不同的透明度
page.Canvas.SetTransparency(0.2, 0.2)
page.Canvas.DrawRectangle(pen, brush, RectangleF(PointF(300.0, 250.0), SizeF(200.0, 100.0)))

from spire.pdf.common import *
from spire.pdf import *
import math

# 创建文档
doc = PdfDocument()
page = doc.Pages.Add()

# 保存画布状态
state = page.Canvas.Save()

# 1. 绘制直线
pen = PdfPen(PdfRGBColor(Color.get_Black()), 1.0)
page.Canvas.DrawLine(pen, 50.0, 50.0, 200.0, 50.0)

# 2. 绘制虚线
pen_dash = PdfPen(PdfRGBColor(Color.get_Red()), 2.0)
pen_dash.DashStyle = PdfDashStyle.Dash
page.Canvas.DrawLine(pen_dash, 50.0, 80.0, 200.0, 80.0)

# 3. 绘制矩形边框
pen_rect = PdfPen(PdfRGBColor(Color.get_Blue()), 1.0)
page.Canvas.DrawRectangle(pen_rect, 50.0, 120.0, 150.0, 100.0)

# 4. 绘制填充矩形
pen_fill = PdfPen(PdfRGBColor(Color.get_Black()), 0.5)
brush_fill = PdfSolidBrush(PdfRGBColor(Color.get_OrangeRed()))
page.Canvas.DrawRectangle(pen_fill, brush_fill, 
    RectangleF(PointF(50.0, 250.0), SizeF(150.0, 100.0)))

# 5. 绘制椭圆
brush_ellipse = PdfSolidBrush(PdfRGBColor(Color.get_CadetBlue()))
page.Canvas.DrawEllipse(brush_ellipse, 300.0, 120.0, 100.0, 80.0)

# 6. 绘制正圆
page.Canvas.DrawEllipse(brush_ellipse, 300.0, 250.0, 60.0, 60.0)

# 恢复画布状态
page.Canvas.Restore(state)

# 保存
doc.SaveToFile("ShapesDemo.pdf")
doc.Close()