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CGLLayer.java
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CGLLayer.java
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/*
* Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.java2d.opengl;
import java.awt.GraphicsConfiguration;
import java.awt.Rectangle;
import java.awt.Transparency;
import sun.awt.CGraphicsConfig;
import sun.java2d.NullSurfaceData;
import sun.java2d.SurfaceData;
import sun.lwawt.LWWindowPeer;
import sun.lwawt.macosx.CFRetainedResource;
public class CGLLayer extends CFRetainedResource {
private native long nativeCreateLayer();
private static native void nativeSetScale(long layerPtr, double scale);
private static native void validate(long layerPtr, CGLSurfaceData cglsd);
private static native void blitTexture(long layerPtr);
private LWWindowPeer peer;
private int scale = 1;
private SurfaceData surfaceData; // represents intermediate buffer (texture)
public CGLLayer(LWWindowPeer peer) {
super(0, true);
setPtr(nativeCreateLayer());
this.peer = peer;
}
public long getPointer() {
return ptr;
}
public Rectangle getBounds() {
return peer.getBounds();
}
public GraphicsConfiguration getGraphicsConfiguration() {
return peer.getGraphicsConfiguration();
}
public boolean isOpaque() {
return !peer.isTranslucent();
}
public int getTransparency() {
return isOpaque() ? Transparency.OPAQUE : Transparency.TRANSLUCENT;
}
public Object getDestination() {
return peer.getTarget();
}
public SurfaceData replaceSurfaceData() {
if (getBounds().isEmpty()) {
surfaceData = NullSurfaceData.theInstance;
return surfaceData;
}
// the layer redirects all painting to the buffer's graphics
// and blits the buffer to the layer surface (in drawInCGLContext callback)
CGraphicsConfig gc = (CGraphicsConfig)getGraphicsConfiguration();
surfaceData = gc.createSurfaceData(this);
setScale(gc.getDevice().getScaleFactor());
// the layer holds a reference to the buffer, which in
// turn has a reference back to this layer
if (surfaceData instanceof CGLSurfaceData) {
validate((CGLSurfaceData)surfaceData);
}
return surfaceData;
}
public SurfaceData getSurfaceData() {
return surfaceData;
}
public void validate(final CGLSurfaceData cglsd) {
OGLRenderQueue rq = OGLRenderQueue.getInstance();
rq.lock();
try {
execute(ptr -> validate(ptr, cglsd));
} finally {
rq.unlock();
}
}
@Override
public void dispose() {
// break the connection between the layer and the buffer
validate(null);
SurfaceData oldData = surfaceData;
surfaceData = NullSurfaceData.theInstance;;
if (oldData != null) {
oldData.flush();
}
super.dispose();
}
private void setScale(final int _scale) {
if (scale != _scale) {
scale = _scale;
execute(ptr -> nativeSetScale(ptr, scale));
}
}
// ----------------------------------------------------------------------
// NATIVE CALLBACKS
// ----------------------------------------------------------------------
private void drawInCGLContext() {
// tell the flusher thread not to update the intermediate buffer
// until we are done blitting from it
OGLRenderQueue rq = OGLRenderQueue.getInstance();
rq.lock();
try {
execute(ptr -> blitTexture(ptr));
} finally {
rq.unlock();
}
}
}