Further context-related changes for the JSR-231 API. The GLContext

implementations on all platforms have been split into orthogonal
GLDrawable and GLContext concepts. It is now possible to create more
than one GLContet per GLDrawable (though this has not been tested
yet). GLCanvas has been reimplemented in terms of
GLDrawableFactory.getGLDrawable(). More functionality has been moved
from GLDrawable to GLAutoDrawable. Reimplemented lazy sending of
reshape GLEventListener events in GLCanvas and GLJPanel and deleted
notion of deferred reshapes from GLDrawableHelper and elsewhere.
Sharing of textures and display lists is now expressed in terms of
GLContexts instead of GLDrawables. Still need to move pbuffer creation
into GLDrawableFactory from the onscreen GLContext implementations.
Added option to gleem ExaminerViewer to disable automatic redraws upon
mouse events and respecified more of gleem to work on GLAutoDrawables
rather than GLDrawables. Updated all JOGL demos to work with new APIs
and slightly different initialization sequences (in particular, for
pbuffers -- this will change with the addition of
GLDrawableFactory.createGLPbuffer()).


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JSR-231@324 232f8b59-042b-4e1e-8c03-345bb8c30851

1 files changed, 133 insertions, 0 deletions

diff --git a/src/net/java/games/jogl/impl/windows/WindowsOffscreenGLDrawable.java b/src/net/java/games/jogl/impl/windows/WindowsOffscreenGLDrawable.java
new file mode 100644
index 000000000..03d76574a
--- /dev/null
+++ b/src/net/java/games/jogl/impl/windows/WindowsOffscreenGLDrawable.java
@@ -0,0 +1,133 @@
+/*
+ * 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 net.java.games.jogl.impl.windows;
+
+import net.java.games.jogl.*;
+import net.java.games.jogl.impl.*;
+
+public class WindowsOffscreenGLDrawable extends WindowsGLDrawable {
+  private long origbitmap;
+  private long hbitmap;
+  // Width and height of the underlying bitmap
+  private int  width;
+  private int  height;
+
+  public WindowsOffscreenGLDrawable(GLCapabilities capabilities,
+                                    GLCapabilitiesChooser chooser) {
+    super(null, capabilities, chooser);
+  }
+
+  public GLContext createContext(GLContext shareWith) {
+    return new WindowsOffscreenGLContext(this, shareWith);
+  }
+
+  public void setSize(int newWidth, int newHeight) {
+    width = newWidth;
+    height = newHeight;
+    if (hdc != 0) {
+      destroy();
+    }
+    create();
+  }
+
+  public int getWidth() {
+    return width;
+  }
+
+  public int getHeight() {
+    return height;
+  }
+  
+  private void create() {
+    BITMAPINFO info = new BITMAPINFO();
+    BITMAPINFOHEADER header = info.bmiHeader();
+    int bitsPerPixel = (capabilities.getRedBits() +
+                        capabilities.getGreenBits() +
+                        capabilities.getBlueBits());
+    header.biSize(header.size());
+    header.biWidth(width);
+    // NOTE: negating the height causes the DIB to be in top-down row
+    // order rather than bottom-up; ends up being correct during pixel
+    // readback
+    header.biHeight(-1 * height);
+    header.biPlanes((short) 1);
+    header.biBitCount((short) bitsPerPixel);
+    header.biXPelsPerMeter(0);
+    header.biYPelsPerMeter(0);
+    header.biClrUsed(0);
+    header.biClrImportant(0);
+    header.biCompression(WGL.BI_RGB);
+    header.biSizeImage(width * height * bitsPerPixel / 8);
+
+    hdc = WGL.CreateCompatibleDC(0);
+    if (hdc == 0) {
+      System.out.println("LastError: " + WGL.GetLastError());
+      throw new GLException("Error creating device context for offscreen OpenGL context");
+    }
+    hbitmap = WGL.CreateDIBSection(hdc, info, WGL.DIB_RGB_COLORS, 0, 0, 0);
+    if (hbitmap == 0) {
+      WGL.DeleteDC(hdc);
+      hdc = 0;
+      throw new GLException("Error creating offscreen bitmap of width " + width +
+                            ", height " + height);
+    }
+    if ((origbitmap = WGL.SelectObject(hdc, hbitmap)) == 0) {
+      WGL.DeleteObject(hbitmap);
+      hbitmap = 0;
+      WGL.DeleteDC(hdc);
+      hdc = 0;
+      throw new GLException("Error selecting bitmap into new device context");
+    }
+    
+    choosePixelFormat(false);
+  }
+  
+  public void destroy() {
+    if (hdc != 0) {
+      // Must destroy bitmap and device context
+      WGL.SelectObject(hdc, origbitmap);
+      WGL.DeleteObject(hbitmap);
+      WGL.DeleteDC(hdc);
+      origbitmap = 0;
+      hbitmap = 0;
+      hdc = 0;
+    }
+  }
+}