/* * 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 com.sun.opengl.impl.windows.wgl; import javax.media.opengl.*; import com.sun.opengl.impl.*; public abstract class WindowsWGLDrawable extends GLDrawableImpl { protected static final boolean DEBUG = Debug.debug("WindowsWGLDrawable"); protected GLCapabilitiesChooser chooser; protected boolean pixelFormatChosen; // Workaround for problems on Intel 82855 cards private int setPixelFormatFailCount; private static final int MAX_SET_PIXEL_FORMAT_FAIL_COUNT = 5; protected static final int MAX_PFORMATS = 256; protected static final int MAX_ATTRIBS = 256; public WindowsWGLDrawable(GLDrawableFactory factory, NativeWindow comp, boolean realized, GLCapabilities capabilities, GLCapabilitiesChooser chooser) { super(factory, comp, realized); setChosenGLCapabilities(capabilities); this.chooser = chooser; } public int lockSurface() throws GLException { int ret = super.lockSurface(); if(NativeWindow.LOCK_SURFACE_NOT_READY == ret) { if (DEBUG) { System.err.println("WindowsWGLDrawable.lockSurface: surface not ready"); } return ret; } if (!pixelFormatChosen) { try { choosePixelFormat(true); setPixelFormatFailCount = 0; } catch (RuntimeException e) { if (DEBUG) { System.err.println("WindowsWGLDrawable.lockSurface: squelching exception"); e.printStackTrace(); } // Workaround for problems seen on Intel 82855 cards in particular // Make it look like the lockSurface() call didn't succeed unlockSurface(); if (e instanceof GLException) { if (++setPixelFormatFailCount == MAX_SET_PIXEL_FORMAT_FAIL_COUNT) { setPixelFormatFailCount = 0; throw e; } return NativeWindow.LOCK_SURFACE_NOT_READY; } else { // Probably a user error in the GLCapabilitiesChooser or similar. // Don't propagate non-GLExceptions out because calling code // expects to catch only that exception type throw new GLException(e); } } } return ret; } protected void choosePixelFormat(boolean onscreen) { PIXELFORMATDESCRIPTOR pfd = null; int pixelFormat = 0; GLCapabilities chosenCaps = null; GLCapabilities capabilities = getCapabilities(); long hdc = getNativeWindow().getSurfaceHandle(); if (onscreen) { if ((pixelFormat = WGL.GetPixelFormat(hdc)) != 0) { // The Java2D/OpenGL pipeline probably already set a pixel // format for this canvas. if (DEBUG) { System.err.println("NOTE: pixel format already chosen (by Java2D/OpenGL pipeline?) for window: " + WGL.GetPixelFormat(hdc)); } pfd = newPixelFormatDescriptor(); if (WGL.DescribePixelFormat(hdc, pixelFormat, pfd.size(), pfd) == 0) { // FIXME: should this just be a warning? Not really critical... throw new GLException("Unable to describe pixel format " + pixelFormat + " of window set by Java2D/OpenGL pipeline"); } setChosenGLCapabilities(pfd2GLCapabilities(pfd)); pixelFormatChosen = true; return; } GLCapabilities[] availableCaps = null; int numFormats = 0; pfd = newPixelFormatDescriptor(); // Produce a recommended pixel format selection for the GLCapabilitiesChooser. // Use wglChoosePixelFormatARB if user requested multisampling and if we have it available WindowsWGLDrawable dummyDrawable = null; GLContextImpl dummyContext = null; WGLExt dummyWGLExt = null; if (capabilities.getSampleBuffers()) { dummyDrawable = new WindowsDummyWGLDrawable(getFactory()); dummyContext = (GLContextImpl) dummyDrawable.createContext(null); if (dummyContext != null) { dummyContext.makeCurrent(); dummyWGLExt = (WGLExt) dummyContext.getPlatformGLExtensions(); } } int recommendedPixelFormat = -1; boolean haveWGLChoosePixelFormatARB = false; boolean haveWGLARBMultisample = false; boolean gotAvailableCaps = false; if (dummyWGLExt != null) { try { haveWGLChoosePixelFormatARB = dummyWGLExt.isExtensionAvailable("WGL_ARB_pixel_format"); if (haveWGLChoosePixelFormatARB) { haveWGLARBMultisample = dummyWGLExt.isExtensionAvailable("WGL_ARB_multisample"); int[] iattributes = new int [2 * MAX_ATTRIBS]; int[] iresults = new int [2 * MAX_ATTRIBS]; float[] fattributes = new float[1]; if (glCapabilities2iattributes(capabilities, iattributes, dummyWGLExt, false, null)) { int[] pformats = new int[MAX_PFORMATS]; int[] numFormatsTmp = new int[1]; if (dummyWGLExt.wglChoosePixelFormat(hdc, iattributes, 0, fattributes, 0, MAX_PFORMATS, pformats, 0, numFormatsTmp, 0)) { numFormats = numFormatsTmp[0]; if (numFormats > 0) { // Remove one-basing of pixel format (added on later) recommendedPixelFormat = pformats[0] - 1; if (DEBUG) { System.err.println(getThreadName() + ": Used wglChoosePixelFormatARB to recommend pixel format " + recommendedPixelFormat); } } } else { if (DEBUG) { System.err.println(getThreadName() + ": wglChoosePixelFormatARB failed: " + WGL.GetLastError() ); Thread.dumpStack(); } } if (DEBUG) { if (recommendedPixelFormat < 0) { System.err.print(getThreadName() + ": wglChoosePixelFormatARB didn't recommend a pixel format"); if (capabilities.getSampleBuffers()) { System.err.print(" for multisampled GLCapabilities"); } System.err.println(); } } // Produce a list of GLCapabilities to give to the // GLCapabilitiesChooser. // Use wglGetPixelFormatAttribivARB instead of // DescribePixelFormat to get higher-precision information // about the pixel format (should make the GLCapabilities // more precise as well...i.e., remove the // "HardwareAccelerated" bit, which is basically // meaningless, and put in whether it can render to a // window, to a pbuffer, or to a pixmap) int niattribs = 0; iattributes[0] = WGLExt.WGL_NUMBER_PIXEL_FORMATS; if (dummyWGLExt.wglGetPixelFormatAttribiv(hdc, 0, 0, 1, iattributes, 0, iresults, 0)) { numFormats = iresults[0]; if (DEBUG) { System.err.println("wglGetPixelFormatAttribivARB reported WGL_NUMBER_PIXEL_FORMATS = " + numFormats); } // Should we be filtering out the pixel formats which aren't // applicable, as we are doing here? // We don't have enough information in the GLCapabilities to // represent those that aren't... iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_WINDOW; iattributes[niattribs++] = WGLExt.WGL_ACCELERATION; iattributes[niattribs++] = WGLExt.WGL_SUPPORT_OPENGL; iattributes[niattribs++] = WGLExt.WGL_DEPTH_BITS; iattributes[niattribs++] = WGLExt.WGL_STENCIL_BITS; iattributes[niattribs++] = WGLExt.WGL_DOUBLE_BUFFER; iattributes[niattribs++] = WGLExt.WGL_STEREO; iattributes[niattribs++] = WGLExt.WGL_PIXEL_TYPE; iattributes[niattribs++] = WGLExt.WGL_RED_BITS; iattributes[niattribs++] = WGLExt.WGL_GREEN_BITS; iattributes[niattribs++] = WGLExt.WGL_BLUE_BITS; iattributes[niattribs++] = WGLExt.WGL_ALPHA_BITS; iattributes[niattribs++] = WGLExt.WGL_ACCUM_RED_BITS; iattributes[niattribs++] = WGLExt.WGL_ACCUM_GREEN_BITS; iattributes[niattribs++] = WGLExt.WGL_ACCUM_BLUE_BITS; iattributes[niattribs++] = WGLExt.WGL_ACCUM_ALPHA_BITS; if (haveWGLARBMultisample) { iattributes[niattribs++] = WGLExt.WGL_SAMPLE_BUFFERS; iattributes[niattribs++] = WGLExt.WGL_SAMPLES; } availableCaps = new GLCapabilities[numFormats]; for (int i = 0; i < numFormats; i++) { if (!dummyWGLExt.wglGetPixelFormatAttribiv(hdc, i+1, 0, niattribs, iattributes, 0, iresults, 0)) { throw new GLException("Error getting pixel format attributes for pixel format " + (i + 1) + " of device context"); } availableCaps[i] = iattributes2GLCapabilities(iattributes, niattribs, iresults, true); } gotAvailableCaps = true; } else { long lastErr = WGL.GetLastError(); // Intel Extreme graphics fails with a zero error code if (lastErr != 0) { throw new GLException("Unable to enumerate pixel formats of window using wglGetPixelFormatAttribivARB: error code " + WGL.GetLastError()); } } } } } finally { dummyContext.release(); dummyContext.destroy(); dummyDrawable.destroy(); } } // Fallback path for older cards, in particular Intel Extreme motherboard graphics if (!gotAvailableCaps) { if (DEBUG) { if (!capabilities.getSampleBuffers()) { System.err.println(getThreadName() + ": Using ChoosePixelFormat because multisampling not requested"); } else { System.err.println(getThreadName() + ": Using ChoosePixelFormat because no wglChoosePixelFormatARB"); } } pfd = glCapabilities2PFD(capabilities, onscreen); // Remove one-basing of pixel format (added on later) recommendedPixelFormat = WGL.ChoosePixelFormat(hdc, pfd) - 1; if (DEBUG) { System.err.println(getThreadName() + ": Recommended pixel format = " + recommendedPixelFormat); } numFormats = WGL.DescribePixelFormat(hdc, 1, 0, null); if (numFormats == 0) { throw new GLException("Unable to enumerate pixel formats of window " + toHexString(hdc) + " for GLCapabilitiesChooser"); } availableCaps = new GLCapabilities[numFormats]; for (int i = 0; i < numFormats; i++) { if (WGL.DescribePixelFormat(hdc, 1 + i, pfd.size(), pfd) == 0) { throw new GLException("Error describing pixel format " + (1 + i) + " of device context"); } availableCaps[i] = pfd2GLCapabilities(pfd); } } // NOTE: officially, should make a copy of all of these // GLCapabilities to avoid mutation by the end user during the // chooseCapabilities call, but for the time being, assume they // won't be changed // Supply information to chooser pixelFormat = chooser.chooseCapabilities(capabilities, availableCaps, recommendedPixelFormat); if ((pixelFormat < 0) || (pixelFormat >= numFormats)) { throw new GLException("Invalid result " + pixelFormat + " from GLCapabilitiesChooser (should be between 0 and " + (numFormats - 1) + ")"); } if (DEBUG) { System.err.println(getThreadName() + ": Chosen pixel format (" + pixelFormat + "):"); System.err.println(availableCaps[pixelFormat]); } chosenCaps = availableCaps[pixelFormat]; pixelFormat += 1; // one-base the index if (WGL.DescribePixelFormat(hdc, pixelFormat, pfd.size(), pfd) == 0) { throw new GLException("Error re-describing the chosen pixel format: " + WGL.GetLastError()); } } else { // For now, use ChoosePixelFormat for offscreen surfaces until // we figure out how to properly choose an offscreen- // compatible pixel format pfd = glCapabilities2PFD(capabilities, onscreen); pixelFormat = WGL.ChoosePixelFormat(hdc, pfd); } if (!WGL.SetPixelFormat(hdc, pixelFormat, pfd)) { long lastError = WGL.GetLastError(); if (DEBUG) { System.err.println(getThreadName() + ": SetPixelFormat failed: current context = " + WGL.wglGetCurrentContext() + ", current DC = " + WGL.wglGetCurrentDC()); System.err.println(getThreadName() + ": GetPixelFormat(hdc " + toHexString(hdc) + ") returns " + WGL.GetPixelFormat(hdc)); } throw new GLException("Unable to set pixel format " + pixelFormat + " for device context " + toHexString(hdc) + ": error code " + lastError); } // Reuse the previously-constructed GLCapabilities because it // turns out that using DescribePixelFormat on some pixel formats // (which, for example, support full-scene antialiasing) for some // reason return that they are not OpenGL-capable if (chosenCaps != null) { setChosenGLCapabilities(chosenCaps); } else { setChosenGLCapabilities(pfd2GLCapabilities(pfd)); } pixelFormatChosen = true; } protected static PIXELFORMATDESCRIPTOR glCapabilities2PFD(GLCapabilities caps, boolean onscreen) { int colorDepth = (caps.getRedBits() + caps.getGreenBits() + caps.getBlueBits()); if (colorDepth < 15) { throw new GLException("Bit depths < 15 (i.e., non-true-color) not supported"); } PIXELFORMATDESCRIPTOR pfd = newPixelFormatDescriptor(); int pfdFlags = (WGL.PFD_SUPPORT_OPENGL | WGL.PFD_GENERIC_ACCELERATED); if (caps.getDoubleBuffered()) { pfdFlags |= WGL.PFD_DOUBLEBUFFER; } if (onscreen) { pfdFlags |= WGL.PFD_DRAW_TO_WINDOW; } else { pfdFlags |= WGL.PFD_DRAW_TO_BITMAP; } if (caps.getStereo()) { pfdFlags |= WGL.PFD_STEREO; } pfd.dwFlags(pfdFlags); pfd.iPixelType((byte) WGL.PFD_TYPE_RGBA); pfd.cColorBits((byte) colorDepth); pfd.cRedBits ((byte) caps.getRedBits()); pfd.cGreenBits((byte) caps.getGreenBits()); pfd.cBlueBits ((byte) caps.getBlueBits()); pfd.cAlphaBits((byte) caps.getAlphaBits()); int accumDepth = (caps.getAccumRedBits() + caps.getAccumGreenBits() + caps.getAccumBlueBits()); pfd.cAccumBits ((byte) accumDepth); pfd.cAccumRedBits ((byte) caps.getAccumRedBits()); pfd.cAccumGreenBits((byte) caps.getAccumGreenBits()); pfd.cAccumBlueBits ((byte) caps.getAccumBlueBits()); pfd.cAccumAlphaBits((byte) caps.getAccumAlphaBits()); pfd.cDepthBits((byte) caps.getDepthBits()); pfd.cStencilBits((byte) caps.getStencilBits()); pfd.iLayerType((byte) WGL.PFD_MAIN_PLANE); return pfd; } protected static PIXELFORMATDESCRIPTOR newPixelFormatDescriptor() { PIXELFORMATDESCRIPTOR pfd = PIXELFORMATDESCRIPTOR.create(); pfd.nSize((short) pfd.size()); pfd.nVersion((short) 1); return pfd; } protected static GLCapabilities pfd2GLCapabilities(PIXELFORMATDESCRIPTOR pfd) { if ((pfd.dwFlags() & WGL.PFD_SUPPORT_OPENGL) == 0) { return null; } GLCapabilities res = new GLCapabilities(); res.setRedBits (pfd.cRedBits()); res.setGreenBits (pfd.cGreenBits()); res.setBlueBits (pfd.cBlueBits()); res.setAlphaBits (pfd.cAlphaBits()); res.setAccumRedBits (pfd.cAccumRedBits()); res.setAccumGreenBits(pfd.cAccumGreenBits()); res.setAccumBlueBits (pfd.cAccumBlueBits()); res.setAccumAlphaBits(pfd.cAccumAlphaBits()); res.setDepthBits (pfd.cDepthBits()); res.setStencilBits (pfd.cStencilBits()); res.setDoubleBuffered((pfd.dwFlags() & WGL.PFD_DOUBLEBUFFER) != 0); res.setStereo ((pfd.dwFlags() & WGL.PFD_STEREO) != 0); res.setHardwareAccelerated(((pfd.dwFlags() & WGL.PFD_GENERIC_FORMAT) == 0) || ((pfd.dwFlags() & WGL.PFD_GENERIC_ACCELERATED) != 0)); return res; } protected static boolean glCapabilities2iattributes(GLCapabilities capabilities, int[] iattributes, WGLExt wglExt, boolean pbuffer, int[] floatMode) throws GLException { if (!wglExt.isExtensionAvailable("WGL_ARB_pixel_format")) { return false; } int niattribs = 0; iattributes[niattribs++] = WGLExt.WGL_SUPPORT_OPENGL; iattributes[niattribs++] = GL.GL_TRUE; if (pbuffer) { iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_PBUFFER; iattributes[niattribs++] = GL.GL_TRUE; } else { iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_WINDOW; iattributes[niattribs++] = GL.GL_TRUE; } iattributes[niattribs++] = WGLExt.WGL_DOUBLE_BUFFER; if (capabilities.getDoubleBuffered()) { iattributes[niattribs++] = GL.GL_TRUE; } else { iattributes[niattribs++] = GL.GL_FALSE; } iattributes[niattribs++] = WGLExt.WGL_STEREO; if (capabilities.getStereo()) { iattributes[niattribs++] = GL.GL_TRUE; } else { iattributes[niattribs++] = GL.GL_FALSE; } iattributes[niattribs++] = WGLExt.WGL_DEPTH_BITS; iattributes[niattribs++] = capabilities.getDepthBits(); iattributes[niattribs++] = WGLExt.WGL_RED_BITS; iattributes[niattribs++] = capabilities.getRedBits(); iattributes[niattribs++] = WGLExt.WGL_GREEN_BITS; iattributes[niattribs++] = capabilities.getGreenBits(); iattributes[niattribs++] = WGLExt.WGL_BLUE_BITS; iattributes[niattribs++] = capabilities.getBlueBits(); iattributes[niattribs++] = WGLExt.WGL_ALPHA_BITS; iattributes[niattribs++] = capabilities.getAlphaBits(); iattributes[niattribs++] = WGLExt.WGL_STENCIL_BITS; iattributes[niattribs++] = capabilities.getStencilBits(); if (capabilities.getAccumRedBits() > 0 || capabilities.getAccumGreenBits() > 0 || capabilities.getAccumBlueBits() > 0 || capabilities.getAccumAlphaBits() > 0) { iattributes[niattribs++] = WGLExt.WGL_ACCUM_BITS; iattributes[niattribs++] = (capabilities.getAccumRedBits() + capabilities.getAccumGreenBits() + capabilities.getAccumBlueBits() + capabilities.getAccumAlphaBits()); iattributes[niattribs++] = WGLExt.WGL_ACCUM_RED_BITS; iattributes[niattribs++] = capabilities.getAccumRedBits(); iattributes[niattribs++] = WGLExt.WGL_ACCUM_GREEN_BITS; iattributes[niattribs++] = capabilities.getAccumGreenBits(); iattributes[niattribs++] = WGLExt.WGL_ACCUM_BLUE_BITS; iattributes[niattribs++] = capabilities.getAccumBlueBits(); iattributes[niattribs++] = WGLExt.WGL_ACCUM_ALPHA_BITS; iattributes[niattribs++] = capabilities.getAccumAlphaBits(); } if (wglExt.isExtensionAvailable("WGL_ARB_multisample")) { if (capabilities.getSampleBuffers()) { iattributes[niattribs++] = WGLExt.WGL_SAMPLE_BUFFERS; iattributes[niattribs++] = GL.GL_TRUE; iattributes[niattribs++] = WGLExt.WGL_SAMPLES; iattributes[niattribs++] = capabilities.getNumSamples(); } } boolean rtt = capabilities.getPbufferRenderToTexture(); boolean rect = capabilities.getPbufferRenderToTextureRectangle(); boolean useFloat = capabilities.getPbufferFloatingPointBuffers(); boolean ati = false; if (pbuffer) { // Check some invariants and set up some state if (rect && !rtt) { throw new GLException("Render-to-texture-rectangle requires render-to-texture to be specified"); } if (rect) { if (!wglExt.isExtensionAvailable("GL_NV_texture_rectangle")) { throw new GLException("Render-to-texture-rectangle requires GL_NV_texture_rectangle extension"); } } if (useFloat) { if (!wglExt.isExtensionAvailable("WGL_ATI_pixel_format_float") && !wglExt.isExtensionAvailable("WGL_NV_float_buffer")) { throw new GLException("Floating-point pbuffers not supported by this hardware"); } // Prefer NVidia extension over ATI if (wglExt.isExtensionAvailable("WGL_NV_float_buffer")) { ati = false; floatMode[0] = GLPbuffer.NV_FLOAT; } else { ati = true; floatMode[0] = GLPbuffer.ATI_FLOAT; } if (DEBUG) { System.err.println("Using " + (ati ? "ATI" : "NVidia") + " floating-point extension"); } } // See whether we need to change the pixel type to support ATI's // floating-point pbuffers if (useFloat && ati) { if (rtt) { throw new GLException("Render-to-floating-point-texture not supported on ATI hardware"); } else { iattributes[niattribs++] = WGLExt.WGL_PIXEL_TYPE; iattributes[niattribs++] = WGLExt.WGL_TYPE_RGBA_FLOAT; } } else { if (!rtt) { // Currently we don't support non-truecolor visuals in the // GLCapabilities, so we don't offer the option of making // color-index pbuffers. iattributes[niattribs++] = WGLExt.WGL_PIXEL_TYPE; iattributes[niattribs++] = WGLExt.WGL_TYPE_RGBA; } } if (useFloat && !ati) { iattributes[niattribs++] = WGLExt.WGL_FLOAT_COMPONENTS_NV; iattributes[niattribs++] = GL.GL_TRUE; } if (rtt) { if (useFloat) { assert(!ati); if (!rect) { throw new GLException("Render-to-floating-point-texture only supported on NVidia hardware with render-to-texture-rectangle"); } iattributes[niattribs++] = WGLExt.WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGB_NV; iattributes[niattribs++] = GL.GL_TRUE; } else { iattributes[niattribs++] = rect ? WGLExt.WGL_BIND_TO_TEXTURE_RECTANGLE_RGB_NV : WGLExt.WGL_BIND_TO_TEXTURE_RGB; iattributes[niattribs++] = GL.GL_TRUE; } } } else { iattributes[niattribs++] = WGLExt.WGL_PIXEL_TYPE; iattributes[niattribs++] = WGLExt.WGL_TYPE_RGBA; } return true; } protected static GLCapabilities iattributes2GLCapabilities(int[] iattribs, int niattribs, int[] iresults, boolean requireRenderToWindow) { GLCapabilities res = new GLCapabilities(); for (int i = 0; i < niattribs; i++) { int attr = iattribs[i]; switch (attr) { case WGLExt.WGL_DRAW_TO_WINDOW: if (requireRenderToWindow && iresults[i] != GL.GL_TRUE) return null; break; case WGLExt.WGL_DRAW_TO_PBUFFER: break; case WGLExt.WGL_ACCELERATION: res.setHardwareAccelerated(iresults[i] == WGLExt.WGL_FULL_ACCELERATION); break; case WGLExt.WGL_SUPPORT_OPENGL: if (iresults[i] != GL.GL_TRUE) return null; break; case WGLExt.WGL_DEPTH_BITS: res.setDepthBits(iresults[i]); break; case WGLExt.WGL_STENCIL_BITS: res.setStencilBits(iresults[i]); break; case WGLExt.WGL_DOUBLE_BUFFER: res.setDoubleBuffered(iresults[i] == GL.GL_TRUE); break; case WGLExt.WGL_STEREO: res.setStereo(iresults[i] == GL.GL_TRUE); break; case WGLExt.WGL_PIXEL_TYPE: // Fail softly with unknown results here if (iresults[i] == WGLExt.WGL_TYPE_RGBA|| iresults[i] == WGLExt.WGL_TYPE_RGBA_FLOAT) { res.setPbufferFloatingPointBuffers(true); } break; case WGLExt.WGL_FLOAT_COMPONENTS_NV: if (iresults[i] != 0) { res.setPbufferFloatingPointBuffers(true); } break; case WGLExt.WGL_RED_BITS: res.setRedBits(iresults[i]); break; case WGLExt.WGL_GREEN_BITS: res.setGreenBits(iresults[i]); break; case WGLExt.WGL_BLUE_BITS: res.setBlueBits(iresults[i]); break; case WGLExt.WGL_ALPHA_BITS: res.setAlphaBits(iresults[i]); break; case WGLExt.WGL_ACCUM_RED_BITS: res.setAccumRedBits(iresults[i]); break; case WGLExt.WGL_ACCUM_GREEN_BITS: res.setAccumGreenBits(iresults[i]); break; case WGLExt.WGL_ACCUM_BLUE_BITS: res.setAccumBlueBits(iresults[i]); break; case WGLExt.WGL_ACCUM_ALPHA_BITS: res.setAccumAlphaBits(iresults[i]); break; case WGLExt.WGL_SAMPLE_BUFFERS: res.setSampleBuffers(iresults[i] != 0); break; case WGLExt.WGL_SAMPLES: res.setNumSamples(iresults[i]); break; default: throw new GLException("Unknown pixel format attribute " + iattribs[i]); } } return res; } protected static String getThreadName() { return Thread.currentThread().getName(); } }