画布SurfaceView - 硬件加速 [英] Canvas in SurfaceView - hardware acceleration

问题描述

我开发的ICS，并试图理解为什么一个 Canvas.isHardwareAccelerated（）时，会使用一个总是返回FALSE 画布SurfaceView里。

I'm developing on ICS and trying to understand why a Canvas.isHardwareAccelerated() will always return FALSE when using a Canvas inside a SurfaceView.

我试过一个非常简单的例子是这样的： <一href="http://android-coding.blogspot.com/2011/05/drawing-on-surfaceview.html">http://android-coding.blogspot.com/2011/05/drawing-on-surfaceview.html 或者这一个：<一href="http://jmsliu.com/199/android-canvas-example.html">http://jmsliu.com/199/android-canvas-example.html

I've tried a very basic example like this: http://android-coding.blogspot.com/2011/05/drawing-on-surfaceview.html Or this one: http://jmsliu.com/199/android-canvas-example.html

我甚至修改他们没有平局循环中的任何帆布电话 以为我也许能得到一些不支持硬件加速操作 对于某些绘图调用。 我查了下，不支持的绘图操作这个名单 developer.android.com/guide/topics/graphics/hardware-accel.html 但我没有做任何的。

I even modified them to not have any canvas calls inside the draw loop thinking that I might have got in some unsupported HW accel operations for certain drawing calls. I checked this list under "Unsupported Drawing Operations" developer.android.com/guide/topics/graphics/hardware-accel.html but I'm not doing any of that.

我现在用的是开发人员选项里面的强制GPU渲染标志 和...一起 该清单里面，还我指定minSDK / targetSDK> = 14。

I am using the Force GPU rendering flag inside the Developer Options together with inside the manifests, also I'm specifying minSDK/targetSDK >= 14.

在View.isHardwareAccelerated将返回TRUE，而 Canvas.isHardwareAccelerated将返回始终为false。

The View.isHardwareAccelerated will return TRUE, while the Canvas.isHardwareAccelerated will return always FALSE.

我见过Canvas.java具有硬codeded返回false isHardwareAccelerated（），而HardwareCanvas.java有返回true。我想对于一些原因，我没有收到汉王路，为什么？

I've seen that Canvas.java has hard-codeded return false for isHardwareAccelerated(), while HardwareCanvas.java has return true. I guess for some reasons I'm not getting the HW path, why?

能否SurfaceView内的画布进行硬件加速？

Can a Canvas inside a SurfaceView be HW accelerated?

感谢

推荐答案

按 SurfaceView.lockCanvas（）不能被硬件此刻加速。回到画布。

A Canvas returned by SurfaceView.lockCanvas() cannot be hardware accelerated at the moment.

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