在Windows中它是非常快的，因为Windows允许创建一个本地分配图像可以从Windows接收的绘制画布。
In Windows it is very fast because Windows allows creating a locally allocated image which can receive drawings from a Windows Canvas.
现在我们有了一张画布，让我们绘制一些标记来显示沿着标尺的不同点。
Now that we have a canvas, let's draw marks to show the various points along the ruler.
只要一支手写笔，或者一只鼠标，用户就可以在画布上绘制图片，且这并不需要程序员来跟踪或处理任何事件。
Using a stylus, or alternately a mouse, users can draw on the canvas without the developer needing to directly deal with tracking events.
在这个示例中，您已经看到了许多最重要的、也是最常使用的画布api，但还有其他几个API(比如用于绘制曲线)。
You have seen many of the most important and most commonly used canvas APIs in this example, but there are several other APIs (such as for drawing curves).
现在在水彩图层之上再新建一个图层，然后从下至上从黑色到透明做线性递减绘制，这样基本上整个画布到底部就褪化为黑色了。
Now in a new layer above the watercolor layer, and drawing straight up, make a Linear Gradient going from black to transparency so that afterwards your canvas basically fades to black down the bottom.
这种新标记是一个画布，可以在其上绘制直线和矩形、放置图片、进行旋转等。
This new tag is a graphics canvas on which you can draw lines and rectangles, place images, perform rotations, and more.
不管那个艺术家是谁，X光检查显示该画是水平绘制的，而毕加索则将画布旋转了90度并完成了《演员》这幅作品。
Whoever the artist was, the X-rays showed that the landscape was painted horizontally, and that Picasso rotated the canvas for the vertical composition of "the Actor."
有时，我需要在一张图像或一块空白画布上绘制几根线条和一些文本。
Sometimes I need to draw a few lines or some text on an image or a blank canvas.
绘制出你的图标环绕在画布中心，使环绕相当大。
Draw out your icon surround in the center of the canvas, make the surround fairly big.
自定义背景-选择下方的画布上绘制一个平面，条纹或方格背景(甚至是自定义图像)。
Custom Backgrounds - Pick a flat, striped or checkered background (or even a custom image) to be drawn beneath the canvas.
我画4层叠矩形，绕一个点在画布上，然后再次绘制相同的形状，但堆叠的矩形没有保持完全一致。
I am drawing 4 stacked rectangles, rotating the canvas about a point and then drawing that same shape again but the stacked rectangles aren't remaining completely aligned.
将指定物件的表示值绘制到指定的画布上。
Paints a representation of the value of the specified object to the specified canvas.
将指定物件的表示值绘制到指定的画布上。
Paints a representation of the value of the specified object to the specified canvas.
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