| /******************************************************************************* |
| * Copyright (c) 2000, 2003 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.opengl.internal.win32.*; |
| import org.eclipse.swt.internal.win32.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class GLCanvas extends Canvas { |
| int glHandle; |
| |
| public GLCanvas (Composite parent, int style, GLFormatData data) { |
| super (parent, style); |
| if (data == null) SWT.error (SWT.ERROR_NULL_ARGUMENT); |
| |
| PIXELFORMATDESCRIPTOR pfd = new PIXELFORMATDESCRIPTOR (); |
| pfd.nSize = (short) PIXELFORMATDESCRIPTOR.sizeof; |
| pfd.nVersion = 1; |
| pfd.dwFlags = WGL.PFD_DRAW_TO_WINDOW | WGL.PFD_SUPPORT_OPENGL; |
| pfd.dwLayerMask = WGL.PFD_MAIN_PLANE; |
| pfd.iPixelType = (byte) WGL.PFD_TYPE_RGBA; |
| pfd.cColorBits = (byte) data.bufferSize; |
| if (data.doubleBuffer) pfd.dwFlags |= WGL.PFD_DOUBLEBUFFER; |
| if (data.stereo) pfd.dwFlags |= WGL.PFD_STEREO; |
| pfd.cRedBits = (byte) data.redSize; |
| pfd.cGreenBits = (byte) data.greenSize; |
| pfd.cBlueBits = (byte) data.blueSize; |
| pfd.cAlphaBits = (byte) data.depthSize; |
| pfd.cStencilBits = (byte) data.stencilSize; |
| pfd.cAccumRedBits = (byte) data.accumRedSize; |
| pfd.cAccumGreenBits = (byte) data.accumGreenSize; |
| pfd.cAccumBlueBits = (byte) data.accumBlueSize; |
| pfd.cAccumAlphaBits = (byte) data.accumAlphaSize; |
| pfd.cAccumBits = (byte) (pfd.cAccumRedBits + pfd.cAccumGreenBits + pfd.cAccumBlueBits + pfd.cAccumAlphaBits); |
| //FIXME - use wglChoosePixelFormatARB |
| // if (data.sampleBuffers > 0) { |
| // wglAttrib [pos++] = WGL.WGL_SAMPLE_BUFFERS_ARB; |
| // wglAttrib [pos++] = data.sampleBuffers; |
| // } |
| // if (data.samples > 0) { |
| // wglAttrib [pos++] = WGL.WGL_SAMPLES_ARB; |
| // wglAttrib [pos++] = data.samples; |
| // } |
| |
| int hDC = OS.GetDC (handle); |
| int pixelFormat = WGL.ChoosePixelFormat (hDC, pfd); |
| if (pixelFormat == 0) { |
| OS.ReleaseDC (handle, hDC); |
| SWT.error (SWT.ERROR_UNSUPPORTED_DEPTH); |
| } |
| if (!WGL.SetPixelFormat (hDC, pixelFormat, pfd)) { |
| OS.ReleaseDC (handle, hDC); |
| SWT.error (SWT.ERROR_UNSUPPORTED_DEPTH); |
| } |
| glHandle = WGL.wglCreateContext (hDC); |
| if (glHandle == 0) { |
| OS.ReleaseDC (handle, hDC); |
| SWT.error (SWT.ERROR_NO_HANDLES); |
| } |
| OS.ReleaseDC (handle, hDC); |
| } |
| |
| public boolean isCurrent () { |
| checkWidget (); |
| return WGL.wglGetCurrentContext () == handle; |
| } |
| |
| public void setCurrent () { |
| checkWidget (); |
| if (WGL.wglGetCurrentContext () == handle) return; |
| int hDC = OS.GetDC (handle); |
| WGL.wglMakeCurrent (hDC, glHandle); |
| OS.ReleaseDC (handle, hDC); |
| } |
| |
| public void swapBuffers () { |
| checkWidget (); |
| int hDC = OS.GetDC(handle); |
| WGL.SwapBuffers (hDC); |
| OS.ReleaseDC (handle, hDC); |
| } |
| } |