Java 类sun.java2d.pipe.hw.ExtendedBufferCapabilities 实例源码

项目：OpenJSharp 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：jdk8u-jdk 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：openjdk-jdk10 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：openjdk9 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：jdk8u_jdk 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：lookaside_java-1.8.0-openjdk 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：infobip-open-jdk-8 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：jdk8u-dev-jdk 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：jdk7-jdk 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：openjdk-source-code-learn 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：OLD-OpenJDK8 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：openjdk-jdk7u-jdk 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：openjdk-icedtea7 文件：D3DSurfaceData.java

/**
 * Creates a SurfaceData object representing the back buffer of a
 * double-buffered on-screen Window.
 */
public static D3DSurfaceData createData(WComponentPeer peer, Image image) {
    D3DGraphicsConfig gc = getGC(peer);
    if (gc == null || !peer.isAccelCapable()) {
        return null;
    }
    BufferCapabilities caps = peer.getBackBufferCaps();
    VSyncType vSyncType = VSYNC_DEFAULT;
    if (caps instanceof ExtendedBufferCapabilities) {
        vSyncType = ((ExtendedBufferCapabilities)caps).getVSync();
    }
    Rectangle r = peer.getBounds();
    BufferCapabilities.FlipContents flip = caps.getFlipContents();
    int swapEffect;
    if (flip == FlipContents.COPIED) {
        swapEffect = SWAP_COPY;
    } else if (flip == FlipContents.PRIOR) {
        swapEffect = SWAP_FLIP;
    } else { // flip == FlipContents.UNDEFINED || .BACKGROUND
        swapEffect = SWAP_DISCARD;
    }
    return new D3DSurfaceData(peer, gc, r.width, r.height,
                              image, peer.getColorModel(),
                              peer.getBackBuffersNum(),
                              swapEffect, vSyncType, FLIP_BACKBUFFER);
}

项目：OpenJSharp 文件：Component.java

/**
 * 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();
}

项目：OpenJSharp 文件：CGLVolatileSurfaceManager.java

/**
     * Create a pbuffer-based SurfaceData object (or init the backbuffer
     * of an existing window if this is a double buffered GraphicsConfig)
     */
    protected SurfaceData initAcceleratedSurface() {
        SurfaceData sData = null;
        Component comp = vImg.getComponent();
        final ComponentPeer peer = (comp != null) ? comp.getPeer() : null;

        try {
            boolean createVSynced = false;
            boolean forceback = false;
            if (context instanceof Boolean) {
                forceback = ((Boolean)context).booleanValue();
                if (forceback && peer instanceof BackBufferCapsProvider) {
                    BackBufferCapsProvider provider =
                        (BackBufferCapsProvider)peer;
                    BufferCapabilities caps = provider.getBackBufferCaps();
                    if (caps instanceof ExtendedBufferCapabilities) {
                        ExtendedBufferCapabilities ebc =
                            (ExtendedBufferCapabilities)caps;
                        if (ebc.getVSync() == VSYNC_ON &&
                            ebc.getFlipContents() == COPIED)
                        {
                            createVSynced = true;
                            forceback = false;
                        }
                    }
                }
            }

            if (forceback) {
                // peer must be non-null in this case
                // TODO: modify parameter to delegate
                //                sData = CGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
            } else {
                CGLGraphicsConfig gc =
                    (CGLGraphicsConfig)vImg.getGraphicsConfig();
                ColorModel cm = gc.getColorModel(vImg.getTransparency());
                int type = vImg.getForcedAccelSurfaceType();
                // if acceleration type is forced (type != UNDEFINED) then
                // use the forced type, otherwise choose one based on caps
                if (type == OGLSurfaceData.UNDEFINED) {
                    type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                        OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
                }
                if (createVSynced) {
                    // TODO: modify parameter to delegate
//                  sData = CGLSurfaceData.createData(peer, vImg, type);
                } else {
                    sData = CGLSurfaceData.createData(gc,
                                                      vImg.getWidth(),
                                                      vImg.getHeight(),
                                                      cm, vImg, type);
                }
            }
        } catch (NullPointerException ex) {
            sData = null;
        } catch (OutOfMemoryError er) {
            sData = null;
        }

        return sData;
    }

项目：OpenJSharp 文件：WGLVolatileSurfaceManager.java

/**
 * Create a pbuffer-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig).
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    WComponentPeer peer =
        (comp != null) ? (WComponentPeer)comp.getPeer() : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback) {
                BufferCapabilities caps = peer.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = WGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            WGLGraphicsConfig gc =
                (WGLGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose one based on caps
            if (type == OGLSurfaceData.UNDEFINED) {
                type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                    OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
            }
            if (createVSynced) {
                sData = WGLSurfaceData.createData(peer, vImg, type);
            } else {
                sData = WGLSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：OpenJSharp 文件：GLXVolatileSurfaceManager.java

/**
 * Create a pbuffer-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig)
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    X11ComponentPeer peer =
        (comp != null) ? (X11ComponentPeer)comp.getPeer() : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback && peer instanceof BackBufferCapsProvider) {
                BackBufferCapsProvider provider =
                    (BackBufferCapsProvider)peer;
                BufferCapabilities caps = provider.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = GLXSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            GLXGraphicsConfig gc =
                (GLXGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose one based on caps
            if (type == OGLSurfaceData.UNDEFINED) {
                type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                    OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
            }
            if (createVSynced) {
                sData = GLXSurfaceData.createData(peer, vImg, type);
            } else {
                sData = GLXSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：jdk8u-jdk 文件：Component.java

/**
 * 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();
}

项目：jdk8u-jdk 文件：CGLVolatileSurfaceManager.java

/**
     * Create a pbuffer-based SurfaceData object (or init the backbuffer
     * of an existing window if this is a double buffered GraphicsConfig)
     */
    protected SurfaceData initAcceleratedSurface() {
        SurfaceData sData = null;
        Component comp = vImg.getComponent();
        final ComponentPeer peer = (comp != null) ? comp.getPeer() : null;

        try {
            boolean createVSynced = false;
            boolean forceback = false;
            if (context instanceof Boolean) {
                forceback = ((Boolean)context).booleanValue();
                if (forceback && peer instanceof BackBufferCapsProvider) {
                    BackBufferCapsProvider provider =
                        (BackBufferCapsProvider)peer;
                    BufferCapabilities caps = provider.getBackBufferCaps();
                    if (caps instanceof ExtendedBufferCapabilities) {
                        ExtendedBufferCapabilities ebc =
                            (ExtendedBufferCapabilities)caps;
                        if (ebc.getVSync() == VSYNC_ON &&
                            ebc.getFlipContents() == COPIED)
                        {
                            createVSynced = true;
                            forceback = false;
                        }
                    }
                }
            }

            if (forceback) {
                // peer must be non-null in this case
                // TODO: modify parameter to delegate
                //                sData = CGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
            } else {
                CGLGraphicsConfig gc =
                    (CGLGraphicsConfig)vImg.getGraphicsConfig();
                ColorModel cm = gc.getColorModel(vImg.getTransparency());
                int type = vImg.getForcedAccelSurfaceType();
                // if acceleration type is forced (type != UNDEFINED) then
                // use the forced type, otherwise choose one based on caps
                if (type == OGLSurfaceData.UNDEFINED) {
                    type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                        OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
                }
                if (createVSynced) {
                    // TODO: modify parameter to delegate
//                  sData = CGLSurfaceData.createData(peer, vImg, type);
                } else {
                    sData = CGLSurfaceData.createData(gc,
                                                      vImg.getWidth(),
                                                      vImg.getHeight(),
                                                      cm, vImg, type);
                }
            }
        } catch (NullPointerException ex) {
            sData = null;
        } catch (OutOfMemoryError er) {
            sData = null;
        }

        return sData;
    }

项目：jdk8u-jdk 文件：WGLVolatileSurfaceManager.java

/**
 * Create a pbuffer-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig).
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    WComponentPeer peer =
        (comp != null) ? (WComponentPeer)comp.getPeer() : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback) {
                BufferCapabilities caps = peer.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = WGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            WGLGraphicsConfig gc =
                (WGLGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose one based on caps
            if (type == OGLSurfaceData.UNDEFINED) {
                type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                    OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
            }
            if (createVSynced) {
                sData = WGLSurfaceData.createData(peer, vImg, type);
            } else {
                sData = WGLSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：jdk8u-jdk 文件：GLXVolatileSurfaceManager.java

/**
 * Create a pbuffer-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig)
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    X11ComponentPeer peer =
        (comp != null) ? (X11ComponentPeer)comp.getPeer() : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback && peer instanceof BackBufferCapsProvider) {
                BackBufferCapsProvider provider =
                    (BackBufferCapsProvider)peer;
                BufferCapabilities caps = provider.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = GLXSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            GLXGraphicsConfig gc =
                (GLXGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose one based on caps
            if (type == OGLSurfaceData.UNDEFINED) {
                type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                    OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
            }
            if (createVSynced) {
                sData = GLXSurfaceData.createData(peer, vImg, type);
            } else {
                sData = GLXSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：openjdk-jdk10 文件：Component.java

/**
 * 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();
}

项目：openjdk-jdk10 文件：GLXVolatileSurfaceManager.java

/**
 * Create a FBO-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig)
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
    X11ComponentPeer peer = (comp != null) ? acc.getPeer(comp) : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback && peer instanceof BackBufferCapsProvider) {
                BackBufferCapsProvider provider =
                    (BackBufferCapsProvider)peer;
                BufferCapabilities caps = provider.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = GLXSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            GLXGraphicsConfig gc =
                (GLXGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose FBOBJECT
            if (type == OGLSurfaceData.UNDEFINED) {
                type = OGLSurfaceData.FBOBJECT;
            }
            if (createVSynced) {
                sData = GLXSurfaceData.createData(peer, vImg, type);
            } else {
                sData = GLXSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：openjdk-jdk10 文件：CGLVolatileSurfaceManager.java

/**
     * Create a FBO-based SurfaceData object (or init the backbuffer
     * of an existing window if this is a double buffered GraphicsConfig)
     */
    protected SurfaceData initAcceleratedSurface() {
        SurfaceData sData = null;
        Component comp = vImg.getComponent();
        final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
        final ComponentPeer peer = (comp != null) ? acc.getPeer(comp) : null;

        try {
            boolean createVSynced = false;
            boolean forceback = false;
            if (context instanceof Boolean) {
                forceback = ((Boolean)context).booleanValue();
                if (forceback && peer instanceof BackBufferCapsProvider) {
                    BackBufferCapsProvider provider =
                        (BackBufferCapsProvider)peer;
                    BufferCapabilities caps = provider.getBackBufferCaps();
                    if (caps instanceof ExtendedBufferCapabilities) {
                        ExtendedBufferCapabilities ebc =
                            (ExtendedBufferCapabilities)caps;
                        if (ebc.getVSync() == VSYNC_ON &&
                            ebc.getFlipContents() == COPIED)
                        {
                            createVSynced = true;
                            forceback = false;
                        }
                    }
                }
            }

            if (forceback) {
                // peer must be non-null in this case
                // TODO: modify parameter to delegate
                //                sData = CGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
            } else {
                CGLGraphicsConfig gc =
                    (CGLGraphicsConfig)vImg.getGraphicsConfig();
                ColorModel cm = gc.getColorModel(vImg.getTransparency());
                int type = vImg.getForcedAccelSurfaceType();
                // if acceleration type is forced (type != UNDEFINED) then
                // use the forced type, otherwise choose FBOBJECT
                if (type == OGLSurfaceData.UNDEFINED) {
                    type = OGLSurfaceData.FBOBJECT;
                }
                if (createVSynced) {
                    // TODO: modify parameter to delegate
//                  sData = CGLSurfaceData.createData(peer, vImg, type);
                } else {
                    sData = CGLSurfaceData.createData(gc,
                                                      vImg.getWidth(),
                                                      vImg.getHeight(),
                                                      cm, vImg, type);
                }
            }
        } catch (NullPointerException ex) {
            sData = null;
        } catch (OutOfMemoryError er) {
            sData = null;
        }

        return sData;
    }

项目：openjdk-jdk10 文件：WGLVolatileSurfaceManager.java

/**
 * Create a FBO-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig).
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
    WComponentPeer peer = (comp != null) ? acc.getPeer(comp) : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback) {
                BufferCapabilities caps = peer.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = WGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            WGLGraphicsConfig gc =
                (WGLGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose FBOBJECT
            if (type == OGLSurfaceData.UNDEFINED) {
                type = OGLSurfaceData.FBOBJECT;
            }
            if (createVSynced) {
                sData = WGLSurfaceData.createData(peer, vImg, type);
            } else {
                sData = WGLSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：openjdk9 文件：Component.java

/**
 * 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();
}

项目：openjdk9 文件：GLXVolatileSurfaceManager.java

/**
 * Create a FBO-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig)
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
    X11ComponentPeer peer = (comp != null) ? acc.getPeer(comp) : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback && peer instanceof BackBufferCapsProvider) {
                BackBufferCapsProvider provider =
                    (BackBufferCapsProvider)peer;
                BufferCapabilities caps = provider.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = GLXSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            GLXGraphicsConfig gc =
                (GLXGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose FBOBJECT
            if (type == OGLSurfaceData.UNDEFINED) {
                type = OGLSurfaceData.FBOBJECT;
            }
            if (createVSynced) {
                sData = GLXSurfaceData.createData(peer, vImg, type);
            } else {
                sData = GLXSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：openjdk9 文件：CGLVolatileSurfaceManager.java

/**
     * Create a FBO-based SurfaceData object (or init the backbuffer
     * of an existing window if this is a double buffered GraphicsConfig)
     */
    protected SurfaceData initAcceleratedSurface() {
        SurfaceData sData = null;
        Component comp = vImg.getComponent();
        final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
        final ComponentPeer peer = (comp != null) ? acc.getPeer(comp) : null;

        try {
            boolean createVSynced = false;
            boolean forceback = false;
            if (context instanceof Boolean) {
                forceback = ((Boolean)context).booleanValue();
                if (forceback && peer instanceof BackBufferCapsProvider) {
                    BackBufferCapsProvider provider =
                        (BackBufferCapsProvider)peer;
                    BufferCapabilities caps = provider.getBackBufferCaps();
                    if (caps instanceof ExtendedBufferCapabilities) {
                        ExtendedBufferCapabilities ebc =
                            (ExtendedBufferCapabilities)caps;
                        if (ebc.getVSync() == VSYNC_ON &&
                            ebc.getFlipContents() == COPIED)
                        {
                            createVSynced = true;
                            forceback = false;
                        }
                    }
                }
            }

            if (forceback) {
                // peer must be non-null in this case
                // TODO: modify parameter to delegate
                //                sData = CGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
            } else {
                CGLGraphicsConfig gc =
                    (CGLGraphicsConfig)vImg.getGraphicsConfig();
                ColorModel cm = gc.getColorModel(vImg.getTransparency());
                int type = vImg.getForcedAccelSurfaceType();
                // if acceleration type is forced (type != UNDEFINED) then
                // use the forced type, otherwise choose FBOBJECT
                if (type == OGLSurfaceData.UNDEFINED) {
                    type = OGLSurfaceData.FBOBJECT;
                }
                if (createVSynced) {
                    // TODO: modify parameter to delegate
//                  sData = CGLSurfaceData.createData(peer, vImg, type);
                } else {
                    sData = CGLSurfaceData.createData(gc,
                                                      vImg.getWidth(),
                                                      vImg.getHeight(),
                                                      cm, vImg, type);
                }
            }
        } catch (NullPointerException ex) {
            sData = null;
        } catch (OutOfMemoryError er) {
            sData = null;
        }

        return sData;
    }

项目：openjdk9 文件：WGLVolatileSurfaceManager.java

/**
 * Create a FBO-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig).
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    final ComponentAccessor acc = AWTAccessor.getComponentAccessor();
    WComponentPeer peer = (comp != null) ? acc.getPeer(comp) : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback) {
                BufferCapabilities caps = peer.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = WGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            WGLGraphicsConfig gc =
                (WGLGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose FBOBJECT
            if (type == OGLSurfaceData.UNDEFINED) {
                type = OGLSurfaceData.FBOBJECT;
            }
            if (createVSynced) {
                sData = WGLSurfaceData.createData(peer, vImg, type);
            } else {
                sData = WGLSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：Java8CN 文件：Component.java

/**
 * 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();
}

项目：jdk8u_jdk 文件：Component.java

/**
 * 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();
}

项目：jdk8u_jdk 文件：CGLVolatileSurfaceManager.java

/**
     * Create a pbuffer-based SurfaceData object (or init the backbuffer
     * of an existing window if this is a double buffered GraphicsConfig)
     */
    protected SurfaceData initAcceleratedSurface() {
        SurfaceData sData = null;
        Component comp = vImg.getComponent();
        final ComponentPeer peer = (comp != null) ? comp.getPeer() : null;

        try {
            boolean createVSynced = false;
            boolean forceback = false;
            if (context instanceof Boolean) {
                forceback = ((Boolean)context).booleanValue();
                if (forceback && peer instanceof BackBufferCapsProvider) {
                    BackBufferCapsProvider provider =
                        (BackBufferCapsProvider)peer;
                    BufferCapabilities caps = provider.getBackBufferCaps();
                    if (caps instanceof ExtendedBufferCapabilities) {
                        ExtendedBufferCapabilities ebc =
                            (ExtendedBufferCapabilities)caps;
                        if (ebc.getVSync() == VSYNC_ON &&
                            ebc.getFlipContents() == COPIED)
                        {
                            createVSynced = true;
                            forceback = false;
                        }
                    }
                }
            }

            if (forceback) {
                // peer must be non-null in this case
                // TODO: modify parameter to delegate
                //                sData = CGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
            } else {
                CGLGraphicsConfig gc =
                    (CGLGraphicsConfig)vImg.getGraphicsConfig();
                ColorModel cm = gc.getColorModel(vImg.getTransparency());
                int type = vImg.getForcedAccelSurfaceType();
                // if acceleration type is forced (type != UNDEFINED) then
                // use the forced type, otherwise choose one based on caps
                if (type == OGLSurfaceData.UNDEFINED) {
                    type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                        OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
                }
                if (createVSynced) {
                    // TODO: modify parameter to delegate
//                  sData = CGLSurfaceData.createData(peer, vImg, type);
                } else {
                    sData = CGLSurfaceData.createData(gc,
                                                      vImg.getWidth(),
                                                      vImg.getHeight(),
                                                      cm, vImg, type);
                }
            }
        } catch (NullPointerException ex) {
            sData = null;
        } catch (OutOfMemoryError er) {
            sData = null;
        }

        return sData;
    }

项目：jdk8u_jdk 文件：WGLVolatileSurfaceManager.java

/**
 * Create a pbuffer-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig).
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    WComponentPeer peer =
        (comp != null) ? (WComponentPeer)comp.getPeer() : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback) {
                BufferCapabilities caps = peer.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = WGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            WGLGraphicsConfig gc =
                (WGLGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose one based on caps
            if (type == OGLSurfaceData.UNDEFINED) {
                type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                    OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
            }
            if (createVSynced) {
                sData = WGLSurfaceData.createData(peer, vImg, type);
            } else {
                sData = WGLSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：jdk8u_jdk 文件：GLXVolatileSurfaceManager.java

/**
 * Create a pbuffer-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig)
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    X11ComponentPeer peer =
        (comp != null) ? (X11ComponentPeer)comp.getPeer() : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback && peer instanceof BackBufferCapsProvider) {
                BackBufferCapsProvider provider =
                    (BackBufferCapsProvider)peer;
                BufferCapabilities caps = provider.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = GLXSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            GLXGraphicsConfig gc =
                (GLXGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose one based on caps
            if (type == OGLSurfaceData.UNDEFINED) {
                type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                    OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
            }
            if (createVSynced) {
                sData = GLXSurfaceData.createData(peer, vImg, type);
            } else {
                sData = GLXSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：lookaside_java-1.8.0-openjdk 文件：Component.java

/**
 * 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();
}

项目：lookaside_java-1.8.0-openjdk 文件：CGLVolatileSurfaceManager.java

/**
     * Create a pbuffer-based SurfaceData object (or init the backbuffer
     * of an existing window if this is a double buffered GraphicsConfig)
     */
    protected SurfaceData initAcceleratedSurface() {
        SurfaceData sData = null;
        Component comp = vImg.getComponent();
        final ComponentPeer peer = (comp != null) ? comp.getPeer() : null;

        try {
            boolean createVSynced = false;
            boolean forceback = false;
            if (context instanceof Boolean) {
                forceback = ((Boolean)context).booleanValue();
                if (forceback && peer instanceof BackBufferCapsProvider) {
                    BackBufferCapsProvider provider =
                        (BackBufferCapsProvider)peer;
                    BufferCapabilities caps = provider.getBackBufferCaps();
                    if (caps instanceof ExtendedBufferCapabilities) {
                        ExtendedBufferCapabilities ebc =
                            (ExtendedBufferCapabilities)caps;
                        if (ebc.getVSync() == VSYNC_ON &&
                            ebc.getFlipContents() == COPIED)
                        {
                            createVSynced = true;
                            forceback = false;
                        }
                    }
                }
            }

            if (forceback) {
                // peer must be non-null in this case
                // TODO: modify parameter to delegate
                //                sData = CGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
            } else {
                CGLGraphicsConfig gc =
                    (CGLGraphicsConfig)vImg.getGraphicsConfig();
                ColorModel cm = gc.getColorModel(vImg.getTransparency());
                int type = vImg.getForcedAccelSurfaceType();
                // if acceleration type is forced (type != UNDEFINED) then
                // use the forced type, otherwise choose one based on caps
                if (type == OGLSurfaceData.UNDEFINED) {
                    type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                        OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
                }
                if (createVSynced) {
                    // TODO: modify parameter to delegate
//                  sData = CGLSurfaceData.createData(peer, vImg, type);
                } else {
                    sData = CGLSurfaceData.createData(gc,
                                                      vImg.getWidth(),
                                                      vImg.getHeight(),
                                                      cm, vImg, type);
                }
            }
        } catch (NullPointerException ex) {
            sData = null;
        } catch (OutOfMemoryError er) {
            sData = null;
        }

        return sData;
    }

项目：lookaside_java-1.8.0-openjdk 文件：WGLVolatileSurfaceManager.java

/**
 * Create a pbuffer-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig).
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    WComponentPeer peer =
        (comp != null) ? (WComponentPeer)comp.getPeer() : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback) {
                BufferCapabilities caps = peer.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = WGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            WGLGraphicsConfig gc =
                (WGLGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose one based on caps
            if (type == OGLSurfaceData.UNDEFINED) {
                type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                    OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
            }
            if (createVSynced) {
                sData = WGLSurfaceData.createData(peer, vImg, type);
            } else {
                sData = WGLSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：lookaside_java-1.8.0-openjdk 文件：GLXVolatileSurfaceManager.java

/**
 * Create a pbuffer-based SurfaceData object (or init the backbuffer
 * of an existing window if this is a double buffered GraphicsConfig)
 */
protected SurfaceData initAcceleratedSurface() {
    SurfaceData sData;
    Component comp = vImg.getComponent();
    X11ComponentPeer peer =
        (comp != null) ? (X11ComponentPeer)comp.getPeer() : null;

    try {
        boolean createVSynced = false;
        boolean forceback = false;
        if (context instanceof Boolean) {
            forceback = ((Boolean)context).booleanValue();
            if (forceback && peer instanceof BackBufferCapsProvider) {
                BackBufferCapsProvider provider =
                    (BackBufferCapsProvider)peer;
                BufferCapabilities caps = provider.getBackBufferCaps();
                if (caps instanceof ExtendedBufferCapabilities) {
                    ExtendedBufferCapabilities ebc =
                        (ExtendedBufferCapabilities)caps;
                    if (ebc.getVSync() == VSYNC_ON &&
                        ebc.getFlipContents() == COPIED)
                    {
                        createVSynced = true;
                        forceback = false;
                    }
                }
            }
        }

        if (forceback) {
            // peer must be non-null in this case
            sData = GLXSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
        } else {
            GLXGraphicsConfig gc =
                (GLXGraphicsConfig)vImg.getGraphicsConfig();
            ColorModel cm = gc.getColorModel(vImg.getTransparency());
            int type = vImg.getForcedAccelSurfaceType();
            // if acceleration type is forced (type != UNDEFINED) then
            // use the forced type, otherwise choose one based on caps
            if (type == OGLSurfaceData.UNDEFINED) {
                type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
                    OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
            }
            if (createVSynced) {
                sData = GLXSurfaceData.createData(peer, vImg, type);
            } else {
                sData = GLXSurfaceData.createData(gc,
                                                  vImg.getWidth(),
                                                  vImg.getHeight(),
                                                  cm, vImg, type);
            }
        }
    } catch (NullPointerException ex) {
        sData = null;
    } catch (OutOfMemoryError er) {
        sData = null;
    }

    return sData;
}

项目：jdk-1.7-annotated 文件：Component.java

/**
 * 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();
}

项目：infobip-open-jdk-8 文件：Component.java

/**
 * 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();
}