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Diffstat (limited to 'src/classes/javax/media/opengl/GLJPanel.java')
| -rw-r--r-- | src/classes/javax/media/opengl/GLJPanel.java | 877 |
1 files changed, 877 insertions, 0 deletions
diff --git a/src/classes/javax/media/opengl/GLJPanel.java b/src/classes/javax/media/opengl/GLJPanel.java new file mode 100644 index 000000000..3d6f4e831 --- /dev/null +++ b/src/classes/javax/media/opengl/GLJPanel.java @@ -0,0 +1,877 @@ +/* + * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * - Redistribution of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistribution in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * Neither the name of Sun Microsystems, Inc. or the names of + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * This software is provided "AS IS," without a warranty of any kind. ALL + * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, + * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A + * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN + * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR + * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR + * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR + * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR + * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE + * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, + * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF + * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. + * + * You acknowledge that this software is not designed or intended for use + * in the design, construction, operation or maintenance of any nuclear + * facility. + * + * Sun gratefully acknowledges that this software was originally authored + * and developed by Kenneth Bradley Russell and Christopher John Kline. + */ + +package javax.media.opengl; + +import java.awt.*; +import java.awt.geom.*; +import java.awt.image.*; +import javax.swing.*; +import java.nio.*; +import java.security.*; +import javax.swing.JComponent; +import javax.swing.JPanel; +import com.sun.opengl.impl.*; + +// FIXME: Subclasses need to call resetGLFunctionAvailability() on their +// context whenever the displayChanged() function is called on their +// GLEventListeners + +/** A lightweight Swing component which provides OpenGL rendering + support. Provided for compatibility with Swing user interfaces + when adding a heavyweight doesn't work either because of + Z-ordering or LayoutManager problems. This component attempts to + use hardware-accelerated rendering via pbuffers and falls back on + to software rendering if problems occur. This class can not be + instantiated directly; use {@link GLDrawableFactory} to construct + them. <P> + + Note that because this component attempts to use pbuffers for + rendering, and because pbuffers can not be resized, somewhat + surprising behavior may occur during resize operations; the {@link + GLEventListener#init} method may be called multiple times as the + pbuffer is resized to be able to cover the size of the GLJPanel. + This behavior is correct, as the textures and display lists for + the GLJPanel will have been lost during the resize operation. The + application should attempt to make its GLEventListener.init() + methods as side-effect-free as possible. <P> + + The GLJPanel can be made transparent by creating it with a + GLCapabilities object with alpha bits specified and calling {@link + #setOpaque}(false). Pixels with resulting OpenGL alpha values less + than 1.0 will be overlaid on any underlying Java2D rendering. +*/ + +public class GLJPanel extends JPanel implements GLAutoDrawable { + private static final boolean DEBUG = Debug.debug("GLJPanel"); + private static final boolean VERBOSE = Debug.verbose(); + + private GLDrawableHelper drawableHelper = new GLDrawableHelper(); + private volatile boolean isInitialized; + private volatile boolean shouldInitialize = false; + + // Data used for either pbuffers or pixmap-based offscreen surfaces + private GLCapabilities offscreenCaps; + private GLCapabilitiesChooser chooser; + private GLContext shareWith; + // This image is exactly the correct size to render into the panel + private BufferedImage offscreenImage; + // One of these is used to store the read back pixels before storing + // in the BufferedImage + private ByteBuffer readBackBytes; + private IntBuffer readBackInts; + private int readBackWidthInPixels; + private int readBackHeightInPixels; + // Width of the actual GLJPanel + private int panelWidth = 0; + private int panelHeight = 0; + private Updater updater; + private int awtFormat; + private int glFormat; + private int glType; + // Lazy reshape notification + private boolean handleReshape = false; + private boolean sendReshape = true; + + // Implementation using pbuffers + private static boolean hardwareAccelerationDisabled = + Debug.isPropertyDefined("jogl.gljpanel.nohw"); + private static boolean softwareRenderingDisabled = + Debug.isPropertyDefined("jogl.gljpanel.nosw"); + private GLPbuffer pbuffer; + private int pbufferWidth = 256; + private int pbufferHeight = 256; + + // Implementation using software rendering + private GLDrawableImpl offscreenDrawable; + private GLContextImpl offscreenContext; + + // For handling reshape events lazily + private int reshapeX; + private int reshapeY; + private int reshapeWidth; + private int reshapeHeight; + + // For saving/restoring of OpenGL state during ReadPixels + private int[] swapbytes = new int[1]; + private int[] rowlength = new int[1]; + private int[] skiprows = new int[1]; + private int[] skippixels = new int[1]; + private int[] alignment = new int[1]; + + // Implementation using Java2D OpenGL pipeline's back buffer + private static boolean swingBufferPerWindow = + Debug.isPropertyDefined("swing.bufferPerWindow") ? + Debug.getBooleanProperty("swing.bufferPerWindow") : + true; + private boolean oglPipelineEnabled = + Java2D.isOGLPipelineActive() && + !Debug.isPropertyDefined("jogl.gljpanel.noogl"); + // Opaque Object identifier representing the Java2D surface we are + // drawing to; used to determine when to destroy and recreate JOGL + // context + private Object j2dSurface; + // Graphics object being used during Java2D update action + // (absolutely essential to cache this) + private Graphics cached2DGraphics; + // No-op context representing the Java2D OpenGL context + private GLContext j2dContext; + // Context associated with no-op drawable representing the JOGL + // OpenGL context + private GLDrawable joglDrawable; + // The real OpenGL context JOGL uses to render + private GLContext joglContext; + // State captured from Java2D OpenGL context necessary in order to + // properly render into Java2D back buffer + private int[] drawBuffer = new int[1]; + private int[] readBuffer = new int[1]; + // These are always set to (0, 0) except when the Java2D / OpenGL + // pipeline is active + private int viewportX; + private int viewportY; + + /** Creates a new GLJPanel component. The passed GLCapabilities must + be non-null and specifies the OpenGL capabilities for the + component. The GLCapabilitiesChooser must be non-null and + specifies the algorithm for selecting one of the available + GLCapabilities for the component; the GLDrawableFactory uses a + DefaultGLCapabilitiesChooser if the user does not provide + one. The passed GLContext may be null and specifies an OpenGL + context with which to share textures, display lists and other + OpenGL state. */ + protected GLJPanel(GLCapabilities capabilities, GLCapabilitiesChooser chooser, GLContext shareWith) { + super(); + + // Works around problems on many vendors' cards; we don't need a + // back buffer for the offscreen surface anyway + if (capabilities != null) { + offscreenCaps = (GLCapabilities) capabilities.clone(); + } else { + offscreenCaps = new GLCapabilities(); + } + offscreenCaps.setDoubleBuffered(false); + this.chooser = ((chooser != null) ? chooser : new DefaultGLCapabilitiesChooser()); + this.shareWith = shareWith; + } + + public void display() { + if (EventQueue.isDispatchThread()) { + // Want display() to be synchronous, so call paintImmediately() + paintImmediately(0, 0, getWidth(), getHeight()); + } else { + // Multithreaded redrawing of Swing components is not allowed, + // so do everything on the event dispatch thread + try { + EventQueue.invokeAndWait(paintImmediatelyAction); + } catch (Exception e) { + throw new GLException(e); + } + } + } + + private void captureJ2DState(GL gl) { + gl.glGetIntegerv(GL.GL_DRAW_BUFFER, drawBuffer, 0); + gl.glGetIntegerv(GL.GL_READ_BUFFER, readBuffer, 0); + } + + private boolean preGL(Graphics g) { + GL gl = joglContext.getGL(); + // Set up needed state in JOGL context from Java2D context + gl.glEnable(GL.GL_SCISSOR_TEST); + Rectangle r = Java2D.getOGLScissorBox(g); + if (r == null) { + return false; + } + gl.glScissor(r.x, r.y, r.width, r.height); + Rectangle oglViewport = Java2D.getOGLViewport(g, panelWidth, panelHeight); + // If the viewport X or Y changes, in addition to the panel's + // width or height, we need to send a reshape operation to the + // client + if ((viewportX != oglViewport.x) || + (viewportY != oglViewport.y)) { + sendReshape = true; + if (DEBUG) { + System.err.println("Sending reshape because viewport changed"); + System.err.println(" viewportX (" + viewportX + ") ?= oglViewport.x (" + oglViewport.x + ")"); + System.err.println(" viewportY (" + viewportY + ") ?= oglViewport.y (" + oglViewport.y + ")"); + } + } + viewportX = oglViewport.x; + viewportY = oglViewport.y; + + gl.glDrawBuffer(drawBuffer[0]); + gl.glReadBuffer(readBuffer[0]); + return true; + } + + /** Overridden from JComponent; calls event listeners' {@link + GLEventListener#display display} methods. Should not be invoked + by applications directly. */ + public void paintComponent(final Graphics g) { + if (shouldInitialize) { + initialize(); + } + + if (!isInitialized) { + return; + } + + // NOTE: must do this when the context is not current as it may + // involve destroying the pbuffer (current context) and + // re-creating it -- tricky to do properly while the context is + // current + if (handleReshape) { + handleReshape(); + } + + updater.setGraphics(g); + + if (oglPipelineEnabled) { + Java2D.invokeWithOGLContextCurrent(g, new Runnable() { + public void run() { + // Create no-op context representing Java2D context + if (j2dContext == null) { + j2dContext = GLDrawableFactory.getFactory().createExternalGLContext(); + + // Check to see whether we can support the requested + // capabilities or need to fall back to a pbuffer + // FIXME: add more checks? + + GL gl = j2dContext.getGL(); + if ((getGLInteger(gl, GL.GL_RED_BITS) < offscreenCaps.getRedBits()) || + (getGLInteger(gl, GL.GL_GREEN_BITS) < offscreenCaps.getGreenBits()) || + (getGLInteger(gl, GL.GL_BLUE_BITS) < offscreenCaps.getBlueBits()) || + // (getGLInteger(gl, GL.GL_ALPHA_BITS) < offscreenCaps.getAlphaBits()) || + (getGLInteger(gl, GL.GL_ACCUM_RED_BITS) < offscreenCaps.getAccumRedBits()) || + (getGLInteger(gl, GL.GL_ACCUM_GREEN_BITS) < offscreenCaps.getAccumGreenBits()) || + (getGLInteger(gl, GL.GL_ACCUM_BLUE_BITS) < offscreenCaps.getAccumBlueBits()) || + (getGLInteger(gl, GL.GL_ACCUM_ALPHA_BITS) < offscreenCaps.getAccumAlphaBits()) || + // (getGLInteger(gl, GL.GL_DEPTH_BITS) < offscreenCaps.getDepthBits()) || + (getGLInteger(gl, GL.GL_STENCIL_BITS) < offscreenCaps.getStencilBits())) { + if (DEBUG) { + System.err.println("GLJPanel: Falling back to pbuffer-based support because Java2D context insufficient"); + System.err.println(" Available Required"); + System.err.println("GL_RED_BITS " + getGLInteger(gl, GL.GL_RED_BITS) + " " + offscreenCaps.getRedBits()); + System.err.println("GL_GREEN_BITS " + getGLInteger(gl, GL.GL_GREEN_BITS) + " " + offscreenCaps.getGreenBits()); + System.err.println("GL_BLUE_BITS " + getGLInteger(gl, GL.GL_BLUE_BITS) + " " + offscreenCaps.getBlueBits()); + System.err.println("GL_ALPHA_BITS " + getGLInteger(gl, GL.GL_ALPHA_BITS) + " " + offscreenCaps.getAlphaBits()); + System.err.println("GL_ACCUM_RED_BITS " + getGLInteger(gl, GL.GL_ACCUM_RED_BITS) + " " + offscreenCaps.getAccumRedBits()); + System.err.println("GL_ACCUM_GREEN_BITS " + getGLInteger(gl, GL.GL_ACCUM_GREEN_BITS) + " " + offscreenCaps.getAccumGreenBits()); + System.err.println("GL_ACCUM_BLUE_BITS " + getGLInteger(gl, GL.GL_ACCUM_BLUE_BITS) + " " + offscreenCaps.getAccumBlueBits()); + System.err.println("GL_ACCUM_ALPHA_BITS " + getGLInteger(gl, GL.GL_ACCUM_ALPHA_BITS) + " " + offscreenCaps.getAccumAlphaBits()); + System.err.println("GL_DEPTH_BITS " + getGLInteger(gl, GL.GL_DEPTH_BITS) + " " + offscreenCaps.getDepthBits()); + System.err.println("GL_STENCIL_BITS " + getGLInteger(gl, GL.GL_STENCIL_BITS) + " " + offscreenCaps.getStencilBits()); + } + isInitialized = false; + shouldInitialize = true; + oglPipelineEnabled = false; + handleReshape = true; + j2dContext.destroy(); + j2dContext = null; + return; + } + } + + j2dContext.makeCurrent(); + try { + captureJ2DState(j2dContext.getGL()); + Object curSurface = Java2D.getOGLSurfaceIdentifier(g); + if (curSurface != null) { + if (j2dSurface != curSurface) { + if (joglContext != null) { + joglContext.destroy(); + joglContext = null; + joglDrawable = null; + sendReshape = true; + if (DEBUG) { + System.err.println("Sending reshape because surface changed"); + System.err.println("New surface = " + curSurface); + } + } + j2dSurface = curSurface; + } + if (joglContext == null) { + joglDrawable = GLDrawableFactory.getFactory().createExternalGLDrawable(); + joglContext = joglDrawable.createContext(shareWith); + } + drawableHelper.invokeGL(joglDrawable, joglContext, displayAction, initAction); + } + } finally { + j2dContext.release(); + } + } + }); + } else { + if (!hardwareAccelerationDisabled) { + pbuffer.display(); + } else { + drawableHelper.invokeGL(offscreenDrawable, offscreenContext, displayAction, initAction); + } + } + } + + /** Overridden from JPanel; used to indicate that an OpenGL context + may be created for the component. */ + public void addNotify() { + super.addNotify(); + shouldInitialize = true; + if (DEBUG) { + System.err.println("GLJPanel.addNotify()"); + } + } + + /** Overridden from JPanel; used to indicate that it's no longer + safe to have an OpenGL context for the component. */ + public void removeNotify() { + if (DEBUG) { + System.err.println("GLJPanel.removeNotify()"); + } + if (oglPipelineEnabled) { + Java2D.invokeWithOGLContextCurrent(null, new Runnable() { + public void run() { + if (joglContext != null) { + joglContext.destroy(); + joglContext = null; + } + joglDrawable = null; + if (j2dContext != null) { + j2dContext.destroy(); + j2dContext = null; + } + } + }); + } else { + if (!hardwareAccelerationDisabled) { + if (pbuffer != null) { + pbuffer.destroy(); + pbuffer = null; + } + } else { + if (offscreenContext != null) { + offscreenContext.destroy(); + offscreenContext = null; + } + if (offscreenDrawable != null) { + offscreenDrawable.destroy(); + offscreenDrawable = null; + } + } + } + isInitialized = false; + super.removeNotify(); + } + + /** Overridden from Canvas; causes {@link GLEventListener#reshape + reshape} to be called on all registered {@link + GLEventListener}s. Called automatically by the AWT; should not + be invoked by applications directly. */ + public void reshape(int x, int y, int width, int height) { + super.reshape(x, y, width, height); + + reshapeX = x; + reshapeY = y; + reshapeWidth = width; + reshapeHeight = height; + handleReshape = true; + } + + public void setOpaque(boolean opaque) { + if (opaque != isOpaque()) { + if (offscreenImage != null) { + offscreenImage.flush(); + offscreenImage = null; + } + } + super.setOpaque(opaque); + } + + public void addGLEventListener(GLEventListener listener) { + drawableHelper.addGLEventListener(listener); + } + + public void removeGLEventListener(GLEventListener listener) { + drawableHelper.removeGLEventListener(listener); + } + + public GLContext createContext(GLContext shareWith) { + if (!hardwareAccelerationDisabled) { + return pbuffer.createContext(shareWith); + } else { + return offscreenDrawable.createContext(shareWith); + } + } + + public void setRealized(boolean realized) { + } + + public GLContext getContext() { + if (oglPipelineEnabled) { + return joglContext; + } else { + if (!hardwareAccelerationDisabled) { + return pbuffer.getContext(); + } else { + return offscreenContext; + } + } + } + + public GL getGL() { + GLContext context = getContext(); + return (context == null) ? null : context.getGL(); + } + + public void setGL(GL gl) { + GLContext context = getContext(); + if (context != null) { + context.setGL(gl); + } + } + + public void setAutoSwapBufferMode(boolean onOrOff) { + if (!hardwareAccelerationDisabled) { + pbuffer.setAutoSwapBufferMode(onOrOff); + } else { + drawableHelper.setAutoSwapBufferMode(onOrOff); + } + } + + public boolean getAutoSwapBufferMode() { + if (!hardwareAccelerationDisabled) { + return pbuffer.getAutoSwapBufferMode(); + } else { + return drawableHelper.getAutoSwapBufferMode(); + } + } + + public void swapBuffers() { + if (!hardwareAccelerationDisabled) { + pbuffer.swapBuffers(); + } else { + drawableHelper.invokeGL(offscreenDrawable, offscreenContext, swapBuffersAction, initAction); + } + } + + /** For a translucent GLJPanel (one for which {@link #setOpaque + setOpaque}(false) has been called), indicates whether the + application should preserve the OpenGL color buffer + (GL_COLOR_BUFFER_BIT) for correct rendering of the GLJPanel and + underlying widgets which may show through portions of the + GLJPanel with alpha values less than 1. Most Swing + implementations currently expect the GLJPanel to be completely + cleared (e.g., by <code>glClear(GL_COLOR_BUFFER_BIT | + GL_DEPTH_BUFFER_BIT)</code>), but for certain optimized Java2D + and Swing implementations which use OpenGL internally, it may be + possible to perform OpenGL rendering using the GLJPanel into the + same OpenGL drawable as the Java2D implementation. */ + public boolean shouldPreserveColorBufferIfTranslucent() { + return oglPipelineEnabled; + } + + //---------------------------------------------------------------------- + // Internals only below this point + // + + private void initialize() { + if (panelWidth == 0 || + panelHeight == 0) { + // See whether we have a non-zero size yet and can go ahead with + // initialization + if (reshapeWidth == 0 || + reshapeHeight == 0) { + return; + } + + // Pull down reshapeWidth and reshapeHeight into panelWidth and + // panelHeight eagerly in order to complete initialization, and + // force a reshape later + panelWidth = reshapeWidth; + panelHeight = reshapeHeight; + } + + if (!oglPipelineEnabled) { + // Initialize either the hardware-accelerated rendering path or + // the lightweight rendering path + if (!hardwareAccelerationDisabled) { + if (GLDrawableFactory.getFactory().canCreateGLPbuffer()) { + if (pbuffer != null) { + throw new InternalError("Creating pbuffer twice without destroying it (memory leak / correctness bug)"); + } + try { + pbuffer = GLDrawableFactory.getFactory().createGLPbuffer(offscreenCaps, + pbufferWidth, + pbufferHeight, + shareWith); + updater = new Updater(); + pbuffer.addGLEventListener(updater); + shouldInitialize = false; + isInitialized = true; + return; + } catch (GLException e) { + if (DEBUG) { + e.printStackTrace(); + System.err.println("GLJPanel: Falling back on software rendering because of problems creating pbuffer"); + } + hardwareAccelerationDisabled = true; + } + } else { + if (DEBUG) { + System.err.println("GLJPanel: Falling back on software rendering because no pbuffer support"); + } + + // If the factory reports that it can't create a pbuffer, + // don't try again the next time, and fall through to the + // software rendering path + hardwareAccelerationDisabled = true; + } + } + + if (softwareRenderingDisabled) { + throw new GLException("Fallback to software rendering disabled by user"); + } + + // Fall-through path: create an offscreen context instead + offscreenDrawable = GLDrawableFactoryImpl.getFactoryImpl().createOffscreenDrawable(offscreenCaps, chooser); + offscreenDrawable.setSize(Math.max(1, panelWidth), Math.max(1, panelHeight)); + offscreenContext = (GLContextImpl) offscreenDrawable.createContext(shareWith); + offscreenContext.setSynchronized(true); + } + updater = new Updater(); + shouldInitialize = false; + isInitialized = true; + } + + private void handleReshape() { + readBackWidthInPixels = 0; + readBackHeightInPixels = 0; + + panelWidth = reshapeWidth; + panelHeight = reshapeHeight; + + if (DEBUG) { + System.err.println("GLJPanel.handleReshape: (w,h) = (" + + panelWidth + "," + panelHeight + ")"); + } + + sendReshape = true; + + if (!oglPipelineEnabled) { + if (!hardwareAccelerationDisabled) { + // Use factor larger than 2 during shrinks for some hysteresis + float shrinkFactor = 2.5f; + if ((panelWidth > pbufferWidth ) || (panelHeight > pbufferHeight) || + (panelWidth < (pbufferWidth / shrinkFactor)) || (panelHeight < (pbufferWidth / shrinkFactor))) { + if (DEBUG) { + System.err.println("Resizing pbuffer from (" + pbufferWidth + ", " + pbufferHeight + ") " + + " to fit (" + panelWidth + ", " + panelHeight + ")"); + } + // Must destroy and recreate pbuffer to fit + if (pbuffer != null) { + pbuffer.destroy(); + } + pbuffer = null; + isInitialized = false; + pbufferWidth = getNextPowerOf2(panelWidth); + pbufferHeight = getNextPowerOf2(panelHeight); + if (DEBUG) { + System.err.println("New pbuffer size is (" + pbufferWidth + ", " + pbufferHeight + ")"); + } + initialize(); + } + + // It looks like NVidia's drivers (at least the ones on my + // notebook) are buggy and don't allow a rectangle of less than + // the pbuffer's width to be read...this doesn't really matter + // because it's the Graphics.drawImage() calls that are the + // bottleneck. Should probably make the size of the offscreen + // image be the exact size of the pbuffer to save some work on + // resize operations... + readBackWidthInPixels = pbufferWidth; + readBackHeightInPixels = panelHeight; + } else { + offscreenContext.destroy(); + offscreenDrawable.setSize(Math.max(1, panelWidth), Math.max(1, panelHeight)); + readBackWidthInPixels = Math.max(1, panelWidth); + readBackHeightInPixels = Math.max(1, panelHeight); + } + + if (offscreenImage != null) { + offscreenImage.flush(); + offscreenImage = null; + } + } + + handleReshape = false; + } + + // FIXME: it isn't clear whether this works any more given that + // we're accessing the GLDrawable inside of the GLPbuffer directly + // up in reshape() -- need to rethink and clean this up + class Updater implements GLEventListener { + private Graphics g; + + public void setGraphics(Graphics g) { + this.g = g; + } + + public void init(GLAutoDrawable drawable) { + if (oglPipelineEnabled) { + if (!preGL(g)) { + return; + } + } + drawableHelper.init(GLJPanel.this); + } + + public void display(GLAutoDrawable drawable) { + if (oglPipelineEnabled) { + if (!preGL(g)) { + return; + } + } + + if (sendReshape) { + if (DEBUG) { + System.err.println("glViewport(" + viewportX + ", " + viewportY + ", " + panelWidth + ", " + panelHeight + ")"); + } + getGL().glViewport(viewportX, viewportY, panelWidth, panelHeight); + drawableHelper.reshape(GLJPanel.this, viewportX, viewportY, panelWidth, panelHeight); + sendReshape = false; + } + + drawableHelper.display(GLJPanel.this); + + if (!oglPipelineEnabled) { + // Must now copy pixels from offscreen context into surface + if (offscreenImage == null) { + if (panelWidth > 0 && panelHeight > 0) { + // It looks like NVidia's drivers (at least the ones on my + // notebook) are buggy and don't allow a sub-rectangle to be + // read from a pbuffer...this doesn't really matter because + // it's the Graphics.drawImage() calls that are the + // bottleneck + + int awtFormat = 0; + int hwGLFormat = 0; + if (!hardwareAccelerationDisabled) { + // This seems to be a good choice on all platforms + hwGLFormat = GL.GL_UNSIGNED_INT_8_8_8_8_REV; + } + + // Should be more flexible in these BufferedImage formats; + // perhaps see what the preferred image types are on the + // given platform + if (isOpaque()) { + awtFormat = BufferedImage.TYPE_INT_RGB; + } else { + awtFormat = BufferedImage.TYPE_INT_ARGB; + } + + offscreenImage = new BufferedImage(panelWidth, + panelHeight, + awtFormat); + switch (awtFormat) { + case BufferedImage.TYPE_3BYTE_BGR: + glFormat = GL.GL_BGR; + glType = GL.GL_UNSIGNED_BYTE; + readBackBytes = ByteBuffer.allocate(readBackWidthInPixels * readBackHeightInPixels * 3); + break; + + case BufferedImage.TYPE_INT_RGB: + case BufferedImage.TYPE_INT_ARGB: + glFormat = GL.GL_BGRA; + glType = (hardwareAccelerationDisabled + ? offscreenContext.getOffscreenContextPixelDataType() + : hwGLFormat); + readBackInts = IntBuffer.allocate(readBackWidthInPixels * readBackHeightInPixels); + break; + + default: + // FIXME: Support more off-screen image types (current + // offscreen context implementations don't use others, and + // some of the OpenGL formats aren't supported in the 1.1 + // headers, which we're currently using) + throw new GLException("Unsupported offscreen image type " + awtFormat); + } + } + } + + if (offscreenImage != null) { + GL gl = getGL(); + // Save current modes + gl.glGetIntegerv(GL.GL_PACK_SWAP_BYTES, swapbytes, 0); + gl.glGetIntegerv(GL.GL_PACK_ROW_LENGTH, rowlength, 0); + gl.glGetIntegerv(GL.GL_PACK_SKIP_ROWS, skiprows, 0); + gl.glGetIntegerv(GL.GL_PACK_SKIP_PIXELS, skippixels, 0); + gl.glGetIntegerv(GL.GL_PACK_ALIGNMENT, alignment, 0); + + gl.glPixelStorei(GL.GL_PACK_SWAP_BYTES, GL.GL_FALSE); + gl.glPixelStorei(GL.GL_PACK_ROW_LENGTH, readBackWidthInPixels); + gl.glPixelStorei(GL.GL_PACK_SKIP_ROWS, 0); + gl.glPixelStorei(GL.GL_PACK_SKIP_PIXELS, 0); + gl.glPixelStorei(GL.GL_PACK_ALIGNMENT, 1); + + // Actually read the pixels. + gl.glReadBuffer(GL.GL_FRONT); + if (readBackBytes != null) { + gl.glReadPixels(0, 0, readBackWidthInPixels, readBackHeightInPixels, glFormat, glType, readBackBytes); + } else if (readBackInts != null) { + gl.glReadPixels(0, 0, readBackWidthInPixels, readBackHeightInPixels, glFormat, glType, readBackInts); + } + + // Restore saved modes. + gl.glPixelStorei(GL.GL_PACK_SWAP_BYTES, swapbytes[0]); + gl.glPixelStorei(GL.GL_PACK_ROW_LENGTH, rowlength[0]); + gl.glPixelStorei(GL.GL_PACK_SKIP_ROWS, skiprows[0]); + gl.glPixelStorei(GL.GL_PACK_SKIP_PIXELS, skippixels[0]); + gl.glPixelStorei(GL.GL_PACK_ALIGNMENT, alignment[0]); + + if (readBackBytes != null || readBackInts != null) { + // Copy temporary data into raster of BufferedImage for faster + // blitting Note that we could avoid this copy in the cases + // where !offscreenContext.offscreenImageNeedsVerticalFlip(), + // but that's the software rendering path which is very slow + // anyway + Object src = null; + Object dest = null; + int srcIncr = 0; + int destIncr = 0; + + if (readBackBytes != null) { + src = readBackBytes.array(); + dest = ((DataBufferByte) offscreenImage.getRaster().getDataBuffer()).getData(); + srcIncr = readBackWidthInPixels * 3; + destIncr = offscreenImage.getWidth() * 3; + } else { + src = readBackInts.array(); + dest = ((DataBufferInt) offscreenImage.getRaster().getDataBuffer()).getData(); + srcIncr = readBackWidthInPixels; + destIncr = offscreenImage.getWidth(); + } + + if (!hardwareAccelerationDisabled || + offscreenContext.offscreenImageNeedsVerticalFlip()) { + int srcPos = 0; + int destPos = (offscreenImage.getHeight() - 1) * destIncr; + for (; destPos >= 0; srcPos += srcIncr, destPos -= destIncr) { + System.arraycopy(src, srcPos, dest, destPos, destIncr); + } + } else { + int srcPos = 0; + int destEnd = destIncr * offscreenImage.getHeight(); + for (int destPos = 0; destPos < destEnd; srcPos += srcIncr, destPos += destIncr) { + System.arraycopy(src, srcPos, dest, destPos, destIncr); + } + } + + // Draw resulting image in one shot + g.drawImage(offscreenImage, 0, 0, offscreenImage.getWidth(), offscreenImage.getHeight(), GLJPanel.this); + } + } + } else { + // Cause OpenGL pipeline to flush its results because + // otherwise it's possible we will buffer up multiple frames' + // rendering results, resulting in apparent mouse lag + GL gl = getGL(); + gl.glFinish(); + } + } + + public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) { + // This is handled above and dispatched directly to the appropriate context + } + + public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) { + } + } + + class InitAction implements Runnable { + public void run() { + updater.init(GLJPanel.this); + } + } + private InitAction initAction = new InitAction(); + + class DisplayAction implements Runnable { + public void run() { + updater.display(GLJPanel.this); + } + } + private DisplayAction displayAction = new DisplayAction(); + + // This one is used exclusively in the non-hardware-accelerated case + class SwapBuffersAction implements Runnable { + public void run() { + offscreenDrawable.swapBuffers(); + } + } + private SwapBuffersAction swapBuffersAction = new SwapBuffersAction(); + + class PaintImmediatelyAction implements Runnable { + public void run() { + paintImmediately(0, 0, getWidth(), getHeight()); + } + } + private PaintImmediatelyAction paintImmediatelyAction = new PaintImmediatelyAction(); + + private int getNextPowerOf2(int number) { + // Workaround for problems where 0 width or height are transiently + // seen during layout + if (number == 0) { + return 2; + } + + if (((number-1) & number) == 0) { + //ex: 8 -> 0b1000; 8-1=7 -> 0b0111; 0b1000&0b0111 == 0 + return number; + } + int power = 0; + while (number > 0) { + number = number>>1; + power++; + } + return (1<<power); + } + + private int getGLInteger(GL gl, int which) { + int[] tmp = new int[1]; + gl.glGetIntegerv(which, tmp, 0); + return tmp[0]; + } +} |