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/*
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
* Copyright (c) 2010 JogAmp Community. 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 jogamp.opengl.windows.wgl;
import com.jogamp.common.nio.PointerBuffer;
import javax.media.nativewindow.NativeSurface;
import javax.media.nativewindow.SurfaceChangeable;
import javax.media.opengl.GLContext;
import javax.media.opengl.GLDrawableFactory;
import javax.media.opengl.GLException;
import jogamp.nativewindow.windows.BITMAPINFO;
import jogamp.nativewindow.windows.BITMAPINFOHEADER;
import jogamp.nativewindow.windows.GDI;
import javax.media.opengl.GLCapabilitiesImmutable;
public class WindowsBitmapWGLDrawable extends WindowsWGLDrawable {
private long origbitmap;
private long hbitmap;
protected WindowsBitmapWGLDrawable(GLDrawableFactory factory, NativeSurface target) {
super(factory, target, false);
setRealized(true);
}
protected void destroyImpl() {
setRealized(false);
}
protected void setRealizedImpl() {
if(realized) {
createBitmap();
} else {
destroyBitmap();
}
}
public GLContext createContext(GLContext shareWith) {
return new WindowsBitmapWGLContext(this, shareWith);
}
private void createBitmap() {
int werr;
NativeSurface ns = getNativeSurface();
if(DEBUG) {
System.err.println("WindowsBitmapWGLDrawable (1): "+ns);
}
WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration)ns.getGraphicsConfiguration();
GLCapabilitiesImmutable capabilities = (GLCapabilitiesImmutable)config.getRequestedCapabilities();
int width = getWidth();
int height = getHeight();
//
// 1. Create DIB Section
//
BITMAPINFO info = BITMAPINFO.create();
BITMAPINFOHEADER header = info.getBmiHeader();
int bitsPerPixel = (capabilities.getRedBits() +
capabilities.getGreenBits() +
capabilities.getBlueBits() +
capabilities.getAlphaBits());
header.setBiSize(BITMAPINFOHEADER.size());
header.setBiWidth(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.setBiHeight(-1 * height);
header.setBiPlanes((short) 1);
header.setBiBitCount((short) bitsPerPixel);
header.setBiXPelsPerMeter(0);
header.setBiYPelsPerMeter(0);
header.setBiClrUsed(0);
header.setBiClrImportant(0);
header.setBiCompression(GDI.BI_RGB);
int byteNum = width * height * ( bitsPerPixel >> 3 ) ;
header.setBiSizeImage(byteNum);
PointerBuffer pb = PointerBuffer.allocateDirect(1);
hbitmap = GDI.CreateDIBSection(0, info, GDI.DIB_RGB_COLORS, pb, 0, 0);
werr = GDI.GetLastError();
if(DEBUG) {
long p = ( pb.capacity() > 0 ) ? pb.get(0) : 0;
System.err.println("WindowsBitmapWGLDrawable: pb sz/ptr "+pb.capacity() + ", "+toHexString(p));
System.err.println("WindowsBitmapWGLDrawable: " + width+"x"+height +
", bpp " + bitsPerPixel +
", bytes " + byteNum +
", header sz " + BITMAPINFOHEADER.size() +
", DIB ptr num " + pb.capacity()+
", "+capabilities+
", werr "+werr);
}
if (hbitmap == 0) {
throw new GLException("Error creating offscreen bitmap of " + ns + ", werr " + werr);
}
//
// 2. Create memory DC (device context) , and associate it with the DIB.
//
long hdc = GDI.CreateCompatibleDC(0);
werr = GDI.GetLastError();
if (hdc == 0) {
GDI.DeleteObject(hbitmap);
hbitmap = 0;
throw new GLException("Error creating device context for offscreen OpenGL context, werr "+werr);
}
((SurfaceChangeable)ns).setSurfaceHandle(hdc);
if(DEBUG) {
System.err.println("WindowsBitmapWGLDrawable (2): "+ns);
}
if ((origbitmap = GDI.SelectObject(hdc, hbitmap)) == 0) {
GDI.DeleteObject(hbitmap);
hbitmap = 0;
GDI.DeleteDC(hdc);
hdc = 0;
throw new GLException("Error selecting bitmap into new device context");
}
config.updateGraphicsConfiguration(getFactory(), ns, null);
}
protected void destroyBitmap() {
NativeSurface ns = getNativeSurface();
if (ns.getSurfaceHandle() != 0) {
// Must destroy bitmap and device context
GDI.SelectObject(ns.getSurfaceHandle(), origbitmap);
GDI.DeleteObject(hbitmap);
GDI.DeleteDC(ns.getSurfaceHandle());
origbitmap = 0;
hbitmap = 0;
((SurfaceChangeable)ns).setSurfaceHandle(0);
}
}
}
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