Bugzilla – Attachment 362 Details for
Bug 605
Use of accumulation buffer flips image
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Test code
test_vertical_flip.txt (text/plain), 4.22 KB, created by
Karel Knoest
on 2012-07-11 12:47:27 CEST
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Description:
Test code
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Creator:
Karel Knoest
Created:
2012-07-11 12:47:27 CEST
Size:
4.22 KB
patch
obsolete
>/** > * Copyright 2011 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: > * > * 1. Redistributions of source code must retain the above copyright notice, this list of > * conditions and the following disclaimer. > * > * 2. Redistributions 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. > * > * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED > * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND > * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR > * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR > * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR > * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON > * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING > * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF > * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. > * > * The views and conclusions contained in the software and documentation are those of the > * authors and should not be interpreted as representing official policies, either expressed > * or implied, of JogAmp Community. > */ > >import java.awt.image.BufferedImage; > >import javax.media.opengl.GL2; >import javax.media.opengl.GLAutoDrawable; >import javax.media.opengl.GLCapabilities; >import javax.media.opengl.GLDrawableFactory; >import javax.media.opengl.GLEventListener; >import javax.media.opengl.GLException; >import javax.media.opengl.GLPbuffer; >import javax.media.opengl.GLProfile; > >import com.jogamp.opengl.util.awt.Screenshot; > > >public class FlippedImageTest implements GLEventListener { > > GLPbuffer glPBuffer = null; > > public FlippedImageTest() { > > GLProfile glp = GLProfile.get(GLProfile.GL2); > GLCapabilities caps = new GLCapabilities(glp); > GLDrawableFactory glFactory = GLDrawableFactory.getFactory(glp); > caps.setAccumRedBits(16); > caps.setAccumGreenBits(16); > caps.setAccumBlueBits(16); > caps.setStencilBits(8); > caps.setDoubleBuffered(true); > caps.setHardwareAccelerated(true); > > try { > glPBuffer = glFactory.createGLPbuffer(null, caps, null, 4, 4, null); > } catch (GLException exc) { > } > > > glPBuffer.addGLEventListener(this); > } > > > /** > * @param args > */ > public static void main(String[] args) { > FlippedImageTest demo = new FlippedImageTest(); > > demo.glPBuffer.display(); > demo.glPBuffer.createContext(null).makeCurrent(); > BufferedImage image = Screenshot.readToBufferedImage(4, 4); > > int above = image.getRGB(0, 0); > int below = image.getRGB(0, 3); > > if (above == 0xff00ff00 && below == 0xffff0000) { > System.out.println("image right side up"); > } else if (above == 0xffff0000 && below == 0xff00ff00) { > System.out.println("image is flipped"); > } else { > System.out.println("error in test"); > } > > } > > public void display(GLAutoDrawable drawable) { > GL2 gl = drawable.getGL().getGL2(); > gl.glMatrixMode(GL2.GL_PROJECTION); > gl.glLoadIdentity(); > gl.glMatrixMode(GL2.GL_MODELVIEW); > gl.glLoadIdentity(); > > // red below > gl.glColor3f(1, 0, 0); > gl.glRectf(-1, -1, 1, 0); > > // green above > gl.glColor3f(0, 1, 0); > gl.glRectf(-1, 0, 1, 1); > gl.glFinish(); > > gl.glAccum(GL2.GL_ACCUM, 1.0f); > gl.glAccum(GL2.GL_RETURN, 1.0f); > > gl.glEnd(); > gl.glFlush(); > } > > public void init(GLAutoDrawable drawable) { > } > > public void reshape(GLAutoDrawable glDrawable, int x, int y, int w, int h) { > } > > public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) { > } > > public void dispose(GLAutoDrawable drawable) { > } > >}
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