使用Pycairo动态生成图像并在Django中提供服务 [英] Using Pycairo to generate images dynamically and serve in Django

问题描述

我想用Pycairo生成一个动态创建的png图像，然后用它来设置Django。我读到这个：使用Django提供动态生成的图像。

I want to generate a dynamically created png image with Pycairo and serve it usign Django. I read this: Serve a dynamically generated image with Django.

有没有办法将数据从Pycairo表面直接传输到HTTP响应中？我现在正在这样做：

Is there a way to transport data from Pycairo surface directly into HTTP response? I'm doing this for now:

data = surface.to_rgba()
im = Image.frombuffer ("RGBA", (width, height), data, "raw", "RGBA", 0,1)
response = HttpResponse(mimetype="image/png")
im.save(response, "PNG")
return response

但它实际上不起作用，因为没有一个to_rgba电话（这个电话我发现使用谷歌代码，但不起作用）。

But it actually doesn't work because there isn't a to_rgba call (this call I found using Google code but doesn't work).

编辑：to_rgba可以用正确的调用get_data（）代替，但是我仍然想知道我是否可以完全绕过PIL。

The to_rgba can be replaced by the correct call get_data(), but I still want to know if I can bypass PIL altogether.

推荐答案

def someView(request):
  surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 100, 100)
  context = cairo.Context(surface)
  # Draw something ...

  response = HttpResponse(mimetype="image/png")
  surface.write_to_png(response)
  return response

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