package com.sun.opengl.impl.macosx;
import java.security.*;
import java.util.*;
import javax.media.opengl.*;
import com.sun.opengl.impl.*;
public class MacOSXPbufferGLContext extends MacOSXGLContext {
protected MacOSXPbufferGLDrawable drawable;
// State for render-to-texture and render-to-texture-rectangle support
private int textureTarget; // e.g. GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_NV
private int texture; // actual texture object
private static boolean isTigerOrLater;
static {
String osVersion =
(String) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
return System.getProperty("os.version");
}
});
StringTokenizer tok = new StringTokenizer(osVersion, ". ");
int major = Integer.parseInt(tok.nextToken());
int minor = Integer.parseInt(tok.nextToken());
isTigerOrLater = ((major > 10) || (minor > 3));
}
public MacOSXPbufferGLContext(MacOSXPbufferGLDrawable drawable,
GLContext shareWith) {
super(drawable, shareWith);
this.drawable = drawable;
initOpenGLImpl();
}
public void bindPbufferToTexture() {
GL gl = getGL();
gl.glBindTexture(textureTarget, texture);
// FIXME: not clear whether this is really necessary, but since
// the API docs seem to imply it is and since it doesn't seem to
// impact performance, leaving it in
CGL.setContextTextureImageToPBuffer(nsContext, drawable.getPbuffer(), GL.GL_FRONT);
}
public void releasePbufferFromTexture() {
}
protected int makeCurrentImpl() throws GLException {
if (drawable.getPbuffer() == 0) {
if (DEBUG) {
System.err.println("Pbuffer not instantiated yet for " + this);
}
// pbuffer not instantiated yet
return CONTEXT_NOT_CURRENT;
}
if (getOpenGLMode() != drawable.getOpenGLMode()) {
setOpenGLMode(drawable.getOpenGLMode());
}
boolean created = false;
if (nsContext == 0) {
if (!create()) {
return CONTEXT_NOT_CURRENT;
}
if (DEBUG) {
System.err.println("!!! Created OpenGL context " + toHexString(nsContext) + " for " + getClass().getName());
}
created = true;
}
if (!impl.makeCurrent(nsContext)) {
throw new GLException("Error making nsContext current");
}
if (created) {
resetGLFunctionAvailability();
// Initialize render-to-texture support if requested
boolean rect = drawable.getCapabilities().getPbufferRenderToTextureRectangle();
GL gl = getGL();
if (rect) {
if (!gl.isExtensionAvailable("GL_EXT_texture_rectangle")) {
System.err.println("MacOSXPbufferGLContext: WARNING: GL_EXT_texture_rectangle extension not " +
"supported; skipping requested render_to_texture_rectangle support for pbuffer");
rect = false;
}
}
textureTarget = (rect ? GL.GL_TEXTURE_RECTANGLE_EXT : GL.GL_TEXTURE_2D);
int[] tmp = new int[1];
gl.glGenTextures(1, tmp, 0);
texture = tmp[0];
gl.glBindTexture(textureTarget, texture);
gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MIN_FILTER, GL.GL_NEAREST);
gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MAG_FILTER, GL.GL_NEAREST);
gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE);
gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE);
gl.glCopyTexImage2D(textureTarget, 0, GL.GL_RGB, 0, 0, drawable.getWidth(), drawable.getHeight(), 0);
return CONTEXT_CURRENT_NEW;
}
return CONTEXT_CURRENT;
}
protected void releaseImpl() throws GLException {
if (!impl.release(nsContext)) {
throw new GLException("Error releasing OpenGL nsContext");
}
}
protected void destroyImpl() throws GLException {
if (nsContext != 0) {
if (!impl.destroy(nsContext)) {
throw new GLException("Unable to delete OpenGL context");
}
if (DEBUG) {
System.err.println("!!! Destroyed OpenGL context " + nsContext);
}
nsContext = 0;
GLContextShareSet.contextDestroyed(this);
}
}
public void setSwapInterval(int interval) {
if (nsContext == 0) {
throw new GLException("OpenGL context not current");
}
impl.setSwapInterval(nsContext, interval);
}
public int getFloatingPointMode() {
return GLPbuffer.APPLE_FLOAT;
}
protected boolean create() {
GLCapabilities capabilities = drawable.getCapabilities();
if (capabilities.getPbufferFloatingPointBuffers() &&
!isTigerOrLater) {
throw new GLException("Floating-point pbuffers supported only on OS X 10.4 or later");
}
// Change our OpenGL mode to match that of any share context before we create ourselves
MacOSXGLContext other = (MacOSXGLContext) GLContextShareSet.getShareContext(this);
if (other != null) {
setOpenGLMode(other.getOpenGLMode());
}
// Will throw exception upon error
nsContext = impl.create();
return true;
}
//---------------------------------------------------------------------------
// OpenGL "mode switching" functionality
//
private boolean haveSetOpenGLMode = false;
// FIXME: should consider switching the default mode based on
// whether the Java2D/JOGL bridge is active -- need to ask ourselves
// whether it's more likely that we will share with a GLCanvas or a
// GLJPanel when the bridge is turned on
private int openGLMode = MacOSXGLDrawable.NSOPENGL_MODE;
// Implementation object (either NSOpenGL-based or CGL-based)
protected Impl impl;
public void setOpenGLMode(int mode) {
if (mode == openGLMode) {
return;
}
if (haveSetOpenGLMode) {
throw new GLException("Can't switch between using NSOpenGLPixelBuffer and CGLPBufferObj more than once");
}
destroyImpl();
drawable.setOpenGLMode(mode);
openGLMode = mode;
haveSetOpenGLMode = true;
if (DEBUG) {
System.err.println("Switching PBuffer context mode to " +
((mode == MacOSXGLDrawable.NSOPENGL_MODE) ? "NSOPENGL_MODE" : "CGL_MODE"));
}
initOpenGLImpl();
}
public int getOpenGLMode() {
return openGLMode;
}
private void initOpenGLImpl() {
switch (openGLMode) {
case MacOSXGLDrawable.NSOPENGL_MODE:
impl = new NSOpenGLImpl();
break;
case MacOSXGLDrawable.CGL_MODE:
impl = new CGLImpl();
break;
default:
throw new InternalError("Illegal implementation mode " + openGLMode);
}
}
// Abstract interface for implementation of this context (either
// NSOpenGL-based or CGL-based)
interface Impl {
public long create();
public boolean destroy(long ctx);
public boolean makeCurrent(long ctx);
public boolean release(long ctx);
public void setSwapInterval(long ctx, int interval);
}
// NSOpenGLContext-based implementation
class NSOpenGLImpl implements Impl {
public long create() {
GLCapabilities capabilities = drawable.getCapabilities();
if (capabilities.getPbufferFloatingPointBuffers() &&
!isTigerOrLater) {
throw new GLException("Floating-point pbuffers supported only on OS X 10.4 or later");
}
if (!MacOSXPbufferGLContext.this.create(true, capabilities.getPbufferFloatingPointBuffers())) {
throw new GLException("Error creating context for pbuffer");
}
// Must now associate the pbuffer with our newly-created context
CGL.setContextPBuffer(nsContext, drawable.getPbuffer());
return nsContext;
}
public boolean destroy(long ctx) {
return CGL.deleteContext(ctx);
}
public boolean makeCurrent(long ctx) {
return CGL.makeCurrentContext(ctx);
}
public boolean release(long ctx) {
return CGL.clearCurrentContext(ctx);
}
public void setSwapInterval(long ctx, int interval) {
CGL.setSwapInterval(ctx, interval);
}
}
class CGLImpl implements Impl {
public long create() {
// Find and configure share context
MacOSXGLContext other = (MacOSXGLContext) GLContextShareSet.getShareContext(MacOSXPbufferGLContext.this);
long share = 0;
if (other != null) {
// Reconfigure pbuffer-based GLContexts
if (other instanceof MacOSXPbufferGLContext) {
MacOSXPbufferGLContext ctx = (MacOSXPbufferGLContext) other;
ctx.setOpenGLMode(MacOSXGLDrawable.CGL_MODE);
} else {
if (other.getOpenGLMode() != MacOSXGLDrawable.CGL_MODE) {
throw new GLException("Can't share between NSOpenGLContexts and CGLContextObjs");
}
}
share = other.getNSContext();
// Note we don't check for a 0 return value, since switching
// the context's mode causes it to be destroyed and not
// re-initialized until the next makeCurrent
}
// Set up pixel format attributes
int[] attrs = new int[256];
int i = 0;
attrs[i++] = CGL.kCGLPFAPBuffer;
GLCapabilities capabilities = drawable.getCapabilities();
if (capabilities.getPbufferFloatingPointBuffers())
attrs[i++] = CGL.kCGLPFAColorFloat;
if (capabilities.getDoubleBuffered())
attrs[i++] = CGL.kCGLPFADoubleBuffer;
if (capabilities.getStereo())
attrs[i++] = CGL.kCGLPFAStereo;
attrs[i++] = CGL.kCGLPFAColorSize;
attrs[i++] = (capabilities.getRedBits() +
capabilities.getGreenBits() +
capabilities.getBlueBits());
attrs[i++] = CGL.kCGLPFAAlphaSize;
attrs[i++] = capabilities.getAlphaBits();
attrs[i++] = CGL.kCGLPFADepthSize;
attrs[i++] = capabilities.getDepthBits();
// FIXME: should validate stencil size as is done in MacOSXWindowSystemInterface.m
attrs[i++] = CGL.kCGLPFAStencilSize;
attrs[i++] = capabilities.getStencilBits();
attrs[i++] = CGL.kCGLPFAAccumSize;
attrs[i++] = (capabilities.getAccumRedBits() +
capabilities.getAccumGreenBits() +
capabilities.getAccumBlueBits() +
capabilities.getAccumAlphaBits());
if (capabilities.getSampleBuffers()) {
attrs[i++] = CGL.kCGLPFASampleBuffers;
attrs[i++] = 1;
attrs[i++] = CGL.kCGLPFASamples;
attrs[i++] = capabilities.getNumSamples();
}
// Use attribute array to select pixel format
long[] fmt = new long[1];
long[] numScreens = new long[1];
int res = CGL.CGLChoosePixelFormat(attrs, 0, fmt, 0, numScreens, 0);
if (res != CGL.kCGLNoError) {
throw new GLException("Error code " + res + " while choosing pixel format");
}
// Create new context
long[] ctx = new long[1];
if (DEBUG) {
System.err.println("Share context for CGL-based pbuffer context is " + toHexString(share));
}
res = CGL.CGLCreateContext(fmt[0], share, ctx, 0);
CGL.CGLDestroyPixelFormat(fmt[0]);
if (res != CGL.kCGLNoError) {
throw new GLException("Error code " + res + " while creating context");
}
// Attach newly-created context to the pbuffer
res = CGL.CGLSetPBuffer(ctx[0], drawable.getPbuffer(), 0, 0, 0);
if (res != CGL.kCGLNoError) {
throw new GLException("Error code " + res + " while attaching context to pbuffer");
}
return ctx[0];
}
public boolean destroy(long ctx) {
return (CGL.CGLDestroyContext(ctx) == CGL.kCGLNoError);
}
public boolean makeCurrent(long ctx) {
return CGL.CGLSetCurrentContext(ctx) == CGL.kCGLNoError;
}
public boolean release(long ctx) {
return (CGL.CGLSetCurrentContext(0) == CGL.kCGLNoError);
}
public void setSwapInterval(long ctx, int interval) {
// For now not supported (not really relevant for off-screen contexts anyway)
}
}
}