是否可以在 Python Wand（绘图标题）中使用多种字体？

Question

我在 Wand 中使用以下内容

 with Image(width=width, height=height) as canvas:
        left, top, width, height = 53, 247, 918, 78
        with Drawing() as context:
            context.fill_color = 'transparent'
            context.rectangle(left=left, top=top, width=width, height=height)
            font = Font('Montserrat-Regular.ttf', 0, "white")
            context(canvas)
            canvas.caption(row['DetailText'],
                           left=left, top=top, width=width, height=height, font=font, gravity='center')
        canvas.save(filename='result.png')

效果很好。我想在 row['DetailText'] 中的文本前面加上“NOTES”一词，并以粗体显示。有没有办法做到这一点？

Answer 1

是的，您可以在 Wand 的绘图上下文中定义多种字体。需要进行一些规划，因为您必须将每个文本的样式彼此隔离。使用Drawing.get_font_metrics()方法记录将要渲染的文本的尺寸，并对剩余的文本进行偏移。

with Image(width=300, height=100, pseudo='plasma:') as img:
    with Drawing() as ctx:
        # Global property shared between two styles.
        ctx.font_size = 25
        # Isolate single style.
        ctx.push()
        ctx.font = 'STIX-Bold-Italic'
        ctx.fill_color = 'orange'
        # Grab metrics about the rendered text.
        font_metrics = ctx.get_font_metrics(img, 'Hello ')
        # Draw first "bold" part.
        ctx.text(50, 75, 'Hello')
        ctx.pop()
        # Create another isolated style context.
        ctx.push()
        ctx.font = 'UMTypewriter'
        ctx.fill_color = 'red'
        ctx.text(50 + int(font_metrics.text_width), 75, 'world')
        ctx.pop()
        # Render context.
        ctx(img)
    img.save(filename='output.png')