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35 lines
1006 B
Markdown
35 lines
1006 B
Markdown
# Agg缓冲区
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使用后端AGG以RGB字符串的形式访问地物画布，然后将其转换为数组并将其传递给Pillow进行渲染。
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```python
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import numpy as np
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from matplotlib.backends.backend_agg import FigureCanvasAgg
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import matplotlib.pyplot as plt
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plt.plot([1, 2, 3])
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canvas = plt.get_current_fig_manager().canvas
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agg = canvas.switch_backends(FigureCanvasAgg)
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agg.draw()
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s, (width, height) = agg.print_to_buffer()
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# Convert to a NumPy array.
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X = np.fromstring(s, np.uint8).reshape((height, width, 4))
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# Pass off to PIL.
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from PIL import Image
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im = Image.frombytes("RGBA", (width, height), s)
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# Uncomment this line to display the image using ImageMagick's `display` tool.
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# im.show()
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```
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## 下载这个示例
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- [下载python源码: agg_buffer.py](https://matplotlib.org/_downloads/agg_buffer.py)
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- [下载Jupyter notebook: agg_buffer.ipynb](https://matplotlib.org/_downloads/agg_buffer.ipynb) |