是否可以将Gadfly图直接渲染到画布？我想用gtk开发一个Julia GUI，它渲染了Gadfly图。
我希望有类似的内容：
some_plot = plot(x=[1,2,3],y=[4,5,6])
draw(ctx::CairoContext, some_plot)
或
draw(c::GtkCanvas, some_plot)
我当前的方法是保存png，然后加载图像。显然不是最优的：
ctx = getgc(canvas)
canvas_w = width(canvas)
canvas_h = height(canvas)
save(ctx)
set_source_rgb(ctx,1,1,1)
rectangle(ctx,0,0,canvas_w,canvas_h)
fill(ctx)
restore(ctx)
some_plot = plot(x=[1,2,3],y=[4,5,6])
draw(PNG("myplot.png", 8inch, 4inch), some_plot)
save(ctx)
image = read_from_png("myplot.png")
w = image.width
h = image.height
translate(ctx, canvas_w/2, canvas_h/2)
scale(ctx, canvas_w/w, canvas_h/h)
translate(ctx, -0.5*w, -0.5*h)
set_source_surface(ctx, image, 0, 0)
paint(ctx)
restore(ctx)
谢谢