Java Win32GraphicsEnvironment.isDWMCompositionEnabled方法代码示例

import sun.awt.Win32GraphicsEnvironment; //导入方法依赖的package包/类
@Override
public boolean isAccelCapable() {
    // REMIND: Temp workaround for issues with using HW acceleration
    // in the browser on Vista when DWM is enabled
    // Note: isDWMCompositionEnabled is only relevant on Vista, returns
    // false on other systems.
    return !Win32GraphicsEnvironment.isDWMCompositionEnabled();
}
 

import sun.awt.Win32GraphicsEnvironment; //导入方法依赖的package包/类
/**
 * There are two reasons why we don't use buffer per window when
 * Vista's DWM (aka Aero) is enabled:
 * - since with DWM all windows are already double-buffered, the application
 *   doesn't get expose events so we don't get to use our true back-buffer,
 *   wasting memory and performance (this is valid for both d3d and gdi
 *   pipelines)
 * - in some cases with buffer per window enabled it is possible for the
 *   paint manager to redirect rendering to the screen for some operations
 *   (like copyArea), and since bpw uses its own BufferStrategy the
 *   d3d onscreen rendering support is disabled and rendering goes through
 *   GDI. This doesn't work well with Vista's DWM since one
 *   can not perform GDI and D3D operations on the same surface
 *   (see 6630702 for more info)
 *
 * Note: even though DWM composition state can change during the lifetime
 * of the application it is a rare event, and it is more often that it
 * is temporarily disabled (because of some app) than it is getting
 * permanently enabled so we can live with this approach without the
 * complexity of dwm state listeners and such. This can be revisited if
 * proved otherwise.
 */
@Override
public boolean useBufferPerWindow() {
    return !Win32GraphicsEnvironment.isDWMCompositionEnabled();
}