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/*******************************************************************************
* Copyright (c) 2000, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.opengl;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.internal.carbon.*;
import org.eclipse.swt.internal.opengl.carbon.*;
public class GLCanvas extends Canvas {
int glContext;
static final int MAX_ATTRIBUTES = 32;
public GLCanvas (Composite parent, int style, GLFormatData data) {
super (parent, style);
if (data == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
int aglAttrib [] = new int [MAX_ATTRIBUTES];
int pos = 0;
aglAttrib [pos++] = AGL.AGL_RGBA;
if (data.doubleBuffer) aglAttrib [pos++] = AGL.AGL_DOUBLEBUFFER;
if (data.stereo) aglAttrib [pos++] = AGL.AGL_STEREO;
if (data.redSize > 0) {
aglAttrib [pos++] = AGL.AGL_RED_SIZE;
aglAttrib [pos++] = data.redSize;
}
if (data.greenSize > 0) {
aglAttrib [pos++] = AGL.AGL_GREEN_SIZE;
aglAttrib [pos++] = data.greenSize;
}
if (data.blueSize > 0) {
aglAttrib [pos++] = AGL.AGL_BLUE_SIZE;
aglAttrib [pos++] = data.blueSize;
}
if (data.depthSize > 0) {
aglAttrib [pos++] = AGL.AGL_DEPTH_SIZE;
aglAttrib [pos++] = data.depthSize;
}
if (data.stencilSize > 0) {
aglAttrib [pos++] = AGL.AGL_STENCIL_SIZE;
aglAttrib [pos++] = data.stencilSize;
}
if (data.accumRedSize > 0) {
aglAttrib [pos++] = AGL.AGL_ACCUM_RED_SIZE;
aglAttrib [pos++] = data.accumRedSize;
}
if (data.accumGreenSize > 0) {
aglAttrib [pos++] = AGL.AGL_ACCUM_GREEN_SIZE;
aglAttrib [pos++] = data.accumGreenSize;
}
if (data.accumBlueSize > 0) {
aglAttrib [pos++] = AGL.AGL_ACCUM_BLUE_SIZE;
aglAttrib [pos++] = data.accumBlueSize;
}
if (data.accumAlphaSize > 0) {
aglAttrib [pos++] = AGL.AGL_ACCUM_ALPHA_SIZE;
aglAttrib [pos++] = data.accumAlphaSize;
}
if (data.sampleBuffers > 0) {
aglAttrib [pos++] = AGL.AGL_SAMPLE_BUFFERS_ARB;
aglAttrib [pos++] = data.sampleBuffers;
}
if (data.samples > 0) {
aglAttrib [pos++] = AGL.AGL_SAMPLES_ARB;
aglAttrib [pos++] = data.samples;
}
aglAttrib [pos++] = AGL.AGL_NONE;
int pixelFormat = AGL.aglChoosePixelFormat (0, 0, aglAttrib);
glContext = AGL.aglCreateContext (pixelFormat, 0);
int window = OS.GetControlOwner (handle);
int port = OS.GetWindowPort (window);
AGL.aglSetDrawable (glContext, port);
Listener listener = new Listener () {
public void handleEvent (Event event) {
switch (event.type) {
case SWT.Resize: handleResize (event); break;
}
}
};
addListener (SWT.Resize, listener);
}
void handleResize (Event event) {
Rectangle bounds = getBounds ();
AGL.aglUpdateContext (glContext);
int[] glbounds = new int[4];
glbounds[0] = bounds.x;
glbounds[1] = bounds.y;
glbounds[2] = bounds.width;
glbounds[3] = bounds.height;
AGL.aglSetInteger (glContext, AGL.AGL_BUFFER_RECT, glbounds);
AGL.aglEnable (glContext, AGL.AGL_BUFFER_RECT);
}
public boolean isCurrent () {
return AGL.aglGetCurrentContext () == glContext;
}
public void setCurrent () {
if (AGL.aglGetCurrentContext () == glContext) return;
AGL.aglSetCurrentContext (glContext);
}
public void swapBuffers () {
AGL.aglSwapBuffers (glContext);
}
}
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