1 files changed, 176 insertions, 0 deletions
diff --git a/src/demos/readbuffer/ReadBuffer2Screen.java b/src/demos/readbuffer/ReadBuffer2Screen.java
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+++ b/src/demos/readbuffer/ReadBuffer2Screen.java
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+/*
+ * Copyright (c) 2008 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.
+ * 
+ */
+
+package demos.readbuffer;
+
+import java.nio.*;
+import javax.media.opengl.*;
+import javax.media.opengl.fixedfunc.*;
+
+import com.sun.opengl.util.*;
+import com.sun.opengl.util.glsl.fixedfunc.*;
+
+import javax.media.opengl.fixedfunc.GLPointerFunc;
+import com.sun.opengl.util.texture.Texture;
+import com.sun.opengl.util.texture.TextureData;
+import com.sun.opengl.util.texture.TextureCoords;
+import com.sun.opengl.util.GLArrayDataServer;
+import com.sun.opengl.util.BufferUtil;
+
+public class ReadBuffer2Screen extends ReadBufferBase {
+    PMVMatrix pmvMatrix;
+    GLArrayDataServer readTextureVertices = null;
+    GLArrayDataServer readTextureCoords = null;
+
+    public ReadBuffer2Screen (GLDrawable externalRead) {
+        super(externalRead);
+    }
+
+    public void init(GLAutoDrawable drawable) {
+        super.init(drawable);
+
+        GL gl = drawable.getGL();
+
+        pmvMatrix = new PMVMatrix();
+
+        float f_edge = 1f;
+        if(null==readTextureVertices) {
+            readTextureVertices = GLArrayDataServer.createFixed(gl, GLPointerFunc.GL_VERTEX_ARRAY, "mgl_Vertex", 
+                                                                2, GL.GL_FLOAT, true, 4, GL.GL_STATIC_DRAW);
+            {
+                FloatBuffer vb = (FloatBuffer)readTextureVertices.getBuffer();
+                vb.put(-f_edge); vb.put(-f_edge);
+                vb.put( f_edge); vb.put(-f_edge);
+                vb.put(-f_edge); vb.put( f_edge);
+                vb.put( f_edge); vb.put( f_edge);
+            }
+            readTextureVertices.seal(gl, true);
+        }
+
+        // Clear background to gray
+        gl.glClearColor(0.5f, 0.5f, 0.5f, 0.4f);
+    }
+
+    public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
+        super.reshape(drawable, x, y, width, height);
+
+        GL gl = drawable.getGL();
+
+        gl.glViewport(0, 0, width, height);
+
+        if(gl instanceof GLLightingFunc) {
+            ((GLLightingFunc)gl).glShadeModel(GLLightingFunc.GL_SMOOTH);
+        }
+
+        GLMatrixFunc glM;
+        if(gl instanceof GLMatrixFunc) {
+            glM = (GLMatrixFunc)gl;
+        } else {
+            throw new GLException("ES2 currently unhandled .. ");
+        }
+
+        // Identity ..
+        pmvMatrix.glMatrixMode(pmvMatrix.GL_MODELVIEW);
+        pmvMatrix.glLoadIdentity();
+        pmvMatrix.glTranslatef(0, 0, -2.5f);
+        if(null!=glM) {
+            glM.glMatrixMode(pmvMatrix.GL_MODELVIEW);
+            glM.glLoadMatrixf(pmvMatrix.glGetMvMatrixf());
+        }
+
+        // Set location in front of camera
+        pmvMatrix.glMatrixMode(pmvMatrix.GL_PROJECTION);
+        pmvMatrix.glLoadIdentity();
+        pmvMatrix.gluPerspective(45.0f, (float)width / (float)height, 1.0f, 100.0f);
+        if(null!=glM) {
+            glM.glMatrixMode(pmvMatrix.GL_PROJECTION);
+            glM.glLoadMatrixf(pmvMatrix.glGetPMatrixf());
+        }
+    }
+
+    public void dispose(GLAutoDrawable drawable) {
+        super.dispose(drawable);
+    }
+
+    void renderOffscreenTexture(GL gl) {
+      if(!readBufferUtil.isValid()) return;
+
+      updateTextureCoords(gl, false);
+
+      // Now draw one quad with the texture
+      readBufferUtil.getTexture().enable();
+      readBufferUtil.getTexture().bind();
+      if(gl.isGL2ES1()) {
+          // gl.getGL2ES1().glTexEnvi(GL2ES1.GL_TEXTURE_ENV, GL2ES1.GL_TEXTURE_ENV_MODE, GL2ES1.GL_REPLACE);
+          gl.getGL2ES1().glTexEnvi(GL2ES1.GL_TEXTURE_ENV, GL2ES1.GL_TEXTURE_ENV_MODE, GL2ES1.GL_MODULATE);
+      }
+
+      readTextureVertices.enableBuffer(gl, true);
+      if(null!=readTextureCoords) {
+          readTextureCoords.enableBuffer(gl, true);
+      }
+      gl.glDrawArrays(GL.GL_TRIANGLE_STRIP, 0, readTextureVertices.getElementNumber());
+
+      readBufferUtil.getTexture().disable();
+    }
+
+    void updateTextureCoords(GL gl, boolean force) {
+        if(force || null==readTextureCoords) {
+            readTextureCoords = GLArrayDataServer.createFixed(gl, GLPointerFunc.GL_TEXTURE_COORD_ARRAY, "mgl_MultiTexCoord0", 
+                                                              2, GL.GL_FLOAT, true, 4, GL.GL_STATIC_DRAW);
+            {
+                TextureCoords coords = readBufferUtil.getTexture().getImageTexCoords();
+                FloatBuffer cb = (FloatBuffer)readTextureCoords.getBuffer();
+                cb.put(coords.left());  cb.put(coords.bottom());
+                cb.put(coords.right()); cb.put(coords.bottom());
+                cb.put(coords.left());  cb.put(coords.top());
+                cb.put(coords.right()); cb.put(coords.top());
+            }
+            readTextureCoords.seal(gl, true);
+        }
+    }
+
+    public void display(GLAutoDrawable drawable) {
+        super.display(drawable);
+
+        GL gl = drawable.getGL();
+
+        gl.glClear(gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT);
+        if(gl instanceof GLLightingFunc) {
+            ((GLLightingFunc)gl).glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
+        }
+
+        renderOffscreenTexture(gl);
+    }
+}
+