1 files changed, 96 insertions, 0 deletions
diff --git a/src/net/java/joglutils/msg/elements/GLTextureElement.java b/src/net/java/joglutils/msg/elements/GLTextureElement.java
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+++ b/src/net/java/joglutils/msg/elements/GLTextureElement.java
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+/*
+ * Copyright (c) 2007 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.
+ * 
+ */
+
+package net.java.joglutils.msg.elements;
+
+import java.nio.*;
+import javax.media.opengl.*;
+import javax.media.opengl.glu.*;
+import com.sun.opengl.util.texture.*;
+
+import net.java.joglutils.msg.misc.*;
+import net.java.joglutils.msg.nodes.*;
+
+/** Represents the current texture, which is applied to any drawn
+    geometry if texture coordinates are also supplied, and performs
+    side-effects in OpenGL. */
+
+public class GLTextureElement extends TextureElement {
+  // Boilerplate for concrete element subclasses
+  public Element newInstance() {
+    return new GLTextureElement();
+  }
+  public static GLTextureElement getInstance(State state) {
+    return (GLTextureElement) TextureElement.getInstance(state);
+  }
+  public static void enable(State defaultState) {
+    Element tmp = new GLTextureElement();
+    defaultState.setElement(tmp.getStateIndex(), tmp);
+  }
+
+  public void pop(State state, Element previousTopElement) {
+    // Put things back the way they were
+    switchTextures(((GLTextureElement) previousTopElement).texture, texture, texEnvMode);
+  }
+
+  public void setElt(Texture texture, int texEnvMode) {
+    Texture prev = this.texture;
+    super.setElt(texture, texEnvMode);
+    switchTextures(prev, texture, texEnvMode);
+  }
+
+  private void switchTextures(Texture prev, Texture texture, int texEnvMode) {
+    GL gl = GLU.getCurrentGL();
+    // FIXME: should be smarter about this; if the target is the same
+    // for the previous and current textures, just bind the new one
+    if (prev != null) {
+      prev.disable();
+    }
+    if (texture != null) {
+      texture.enable();
+      texture.bind();
+      int glEnvMode = 0;
+      switch (texEnvMode) {
+        case Texture2.MODULATE:   glEnvMode = GL.GL_MODULATE; break;
+        case Texture2.DECAL:      glEnvMode = GL.GL_DECAL;    break;
+        case Texture2.BLEND:      glEnvMode = GL.GL_BLEND;    break;
+        case Texture2.REPLACE:    glEnvMode = GL.GL_REPLACE;  break;
+      }
+      gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, glEnvMode);
+    }
+  }
+}