Java VSyncedBSManager类代码示例

import sun.awt.image.VSyncedBSManager; //导入依赖的package包/类
/**
 * Destroys the buffers created through this object
 */
protected void destroyBuffers() {
    VSyncedBSManager.releaseVsync(this);
    if (peer != null) {
        peer.destroyBuffers();
    } else {
        throw new IllegalStateException(
            "Component must have a valid peer");
    }
}
 

import sun.awt.image.VSyncedBSManager; //导入依赖的package包/类
/**
 * Creates one or more complex, flipping buffers with the given
 * capabilities.
 * @param numBuffers number of buffers to create; must be greater than
 * one
 * @param caps the capabilities of the buffers.
 * <code>BufferCapabilities.isPageFlipping</code> must be
 * <code>true</code>.
 * @exception AWTException if the capabilities supplied could not be
 * supported or met
 * @exception IllegalStateException if the component has no peer
 * @exception IllegalArgumentException if numBuffers is less than two,
 * or if <code>BufferCapabilities.isPageFlipping</code> is not
 * <code>true</code>.
 * @see java.awt.BufferCapabilities#isPageFlipping()
 */
protected void createBuffers(int numBuffers, BufferCapabilities caps)
    throws AWTException
{
    if (numBuffers < 2) {
        throw new IllegalArgumentException(
            "Number of buffers cannot be less than two");
    } else if (peer == null) {
        throw new IllegalStateException(
            "Component must have a valid peer");
    } else if (caps == null || !caps.isPageFlipping()) {
        throw new IllegalArgumentException(
            "Page flipping capabilities must be specified");
    }

    // save the current bounds
    width = getWidth();
    height = getHeight();

    if (drawBuffer != null) {
        // dispose the existing backbuffers
        drawBuffer = null;
        drawVBuffer = null;
        destroyBuffers();
        // ... then recreate the backbuffers
    }

    if (caps instanceof ExtendedBufferCapabilities) {
        ExtendedBufferCapabilities ebc =
            (ExtendedBufferCapabilities)caps;
        if (ebc.getVSync() == VSYNC_ON) {
            // if this buffer strategy is not allowed to be v-synced,
            // change the caps that we pass to the peer but keep on
            // trying to create v-synced buffers;
            // do not throw IAE here in case it is disallowed, see
            // ExtendedBufferCapabilities for more info
            if (!VSyncedBSManager.vsyncAllowed(this)) {
                caps = ebc.derive(VSYNC_DEFAULT);
            }
        }
    }

    peer.createBuffers(numBuffers, caps);
    updateInternalBuffers();
}
 

import sun.awt.image.VSyncedBSManager; //导入依赖的package包/类
/**
 * Creates one or more complex, flipping buffers with the given
 * capabilities.
 * @param numBuffers number of buffers to create; must be greater than
 * one
 * @param caps the capabilities of the buffers.
 * {@code BufferCapabilities.isPageFlipping} must be
 * {@code true}.
 * @exception AWTException if the capabilities supplied could not be
 * supported or met
 * @exception IllegalStateException if the component has no peer
 * @exception IllegalArgumentException if numBuffers is less than two,
 * or if {@code BufferCapabilities.isPageFlipping} is not
 * {@code true}.
 * @see java.awt.BufferCapabilities#isPageFlipping()
 */
protected void createBuffers(int numBuffers, BufferCapabilities caps)
    throws AWTException
{
    if (numBuffers < 2) {
        throw new IllegalArgumentException(
            "Number of buffers cannot be less than two");
    } else if (peer == null) {
        throw new IllegalStateException(
            "Component must have a valid peer");
    } else if (caps == null || !caps.isPageFlipping()) {
        throw new IllegalArgumentException(
            "Page flipping capabilities must be specified");
    }

    // save the current bounds
    width = getWidth();
    height = getHeight();

    if (drawBuffer != null) {
        // dispose the existing backbuffers
        drawBuffer = null;
        drawVBuffer = null;
        destroyBuffers();
        // ... then recreate the backbuffers
    }

    if (caps instanceof ExtendedBufferCapabilities) {
        ExtendedBufferCapabilities ebc =
            (ExtendedBufferCapabilities)caps;
        if (ebc.getVSync() == VSYNC_ON) {
            // if this buffer strategy is not allowed to be v-synced,
            // change the caps that we pass to the peer but keep on
            // trying to create v-synced buffers;
            // do not throw IAE here in case it is disallowed, see
            // ExtendedBufferCapabilities for more info
            if (!VSyncedBSManager.vsyncAllowed(this)) {
                caps = ebc.derive(VSYNC_DEFAULT);
            }
        }
    }

    peer.createBuffers(numBuffers, caps);
    updateInternalBuffers();
}