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-rwxr-xr-xsrc/jogl/classes/com/sun/opengl/impl/GLStateTracker.java211
1 files changed, 211 insertions, 0 deletions
diff --git a/src/jogl/classes/com/sun/opengl/impl/GLStateTracker.java b/src/jogl/classes/com/sun/opengl/impl/GLStateTracker.java
new file mode 100755
index 000000000..997951faf
--- /dev/null
+++ b/src/jogl/classes/com/sun/opengl/impl/GLStateTracker.java
@@ -0,0 +1,211 @@
+/*
+ * Copyright (c) 2006 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 com.sun.opengl.impl;
+
+import java.util.*;
+import javax.media.opengl.*;
+
+/**
+ * Tracks as closely as possible OpenGL states.
+ * GLStateTracker objects are allocated on a per-OpenGL-context basis.
+ * <p>
+ * Currently supported states: PixelStorei
+ */
+
+public class GLStateTracker {
+ private static final boolean DEBUG = Debug.debug("GLStateTracker");
+
+ private static final Integer GL_PACK_ALIGNMENT = new Integer(GL.GL_PACK_ALIGNMENT);
+ private static final Integer GL_PACK_ROW_LENGTH = new Integer(GL2.GL_PACK_ROW_LENGTH);
+ private static final Integer GL_PACK_SKIP_ROWS = new Integer(GL2.GL_PACK_SKIP_ROWS);
+ private static final Integer GL_PACK_SKIP_PIXELS = new Integer(GL2.GL_PACK_SKIP_PIXELS);
+ private static final Integer GL_PACK_IMAGE_HEIGHT = new Integer(GL2.GL_PACK_IMAGE_HEIGHT);
+ private static final Integer GL_PACK_SKIP_IMAGES = new Integer(GL2.GL_PACK_SKIP_IMAGES);
+
+ private static final Integer GL_UNPACK_ALIGNMENT = new Integer(GL.GL_UNPACK_ALIGNMENT);
+ private static final Integer GL_UNPACK_ROW_LENGTH = new Integer(GL2.GL_UNPACK_ROW_LENGTH);
+ private static final Integer GL_UNPACK_SKIP_ROWS = new Integer(GL2.GL_UNPACK_SKIP_ROWS);
+ private static final Integer GL_UNPACK_SKIP_PIXELS = new Integer(GL2.GL_UNPACK_SKIP_PIXELS);
+ private static final Integer GL_UNPACK_IMAGE_HEIGHT = new Integer(GL2.GL_UNPACK_IMAGE_HEIGHT);
+ private static final Integer GL_UNPACK_SKIP_IMAGES = new Integer(GL2.GL_UNPACK_SKIP_IMAGES);
+
+ private static final Integer zero = new Integer(0);
+
+ private boolean enabled = true;
+
+ private Map/*<Integer,Integer>*/ pixelStateMap = new HashMap/*<Integer,Integer>*/();
+
+ static class SavedState {
+ SavedState() {
+ this.pixelStateMap = null;
+ }
+ void putPixelStateMap(Map pixelStateMap) {
+ this.pixelStateMap = new HashMap();
+ this.pixelStateMap.putAll(pixelStateMap);
+ }
+ Map getPixelStateMap() { return pixelStateMap; }
+
+ private Map pixelStateMap;
+ // private Map otherStateMap;
+ }
+ private List/*<SavedState>*/ stack = new ArrayList();
+
+ public GLStateTracker() {
+ resetStates();
+ }
+
+ public void resetStates() {
+ pixelStateMap.clear();
+
+ pixelStateMap.put(GL_PACK_ALIGNMENT, new Integer(4));
+ pixelStateMap.put(GL_PACK_ROW_LENGTH, zero);
+ pixelStateMap.put(GL_PACK_SKIP_ROWS, zero);
+ pixelStateMap.put(GL_PACK_SKIP_PIXELS, zero);
+ pixelStateMap.put(GL_PACK_IMAGE_HEIGHT, zero);
+ pixelStateMap.put(GL_PACK_SKIP_IMAGES, zero);
+
+ pixelStateMap.put(GL_UNPACK_ALIGNMENT, new Integer(4));
+ pixelStateMap.put(GL_UNPACK_ROW_LENGTH, zero);
+ pixelStateMap.put(GL_UNPACK_SKIP_ROWS, zero);
+ pixelStateMap.put(GL_UNPACK_SKIP_PIXELS, zero);
+ pixelStateMap.put(GL_UNPACK_IMAGE_HEIGHT, zero);
+ pixelStateMap.put(GL_UNPACK_SKIP_IMAGES, zero);
+ }
+
+ public void clearStates() {
+ pixelStateMap.clear();
+ }
+
+ public void setEnabled(boolean on) {
+ enabled = on;
+ }
+
+ public boolean isEnabled() {
+ return enabled;
+ }
+
+ public boolean getInt(int pname, int[] params, int params_offset) {
+ if(enabled) {
+ Integer key = boxKey(pname);
+ if(null!=key) {
+ params[params_offset] = ((Integer) pixelStateMap.get(key)).intValue();
+ return true;
+ }
+ }
+ return false;
+ }
+
+ public boolean getInt(int pname, java.nio.IntBuffer params, int dummy) {
+ if(enabled) {
+ Integer key = boxKey(pname);
+ if(null!=key) {
+ params.put(params.position(), ((Integer) pixelStateMap.get(key)).intValue());
+ return true;
+ }
+ }
+ return false;
+ }
+
+ public void setInt(int pname, int param) {
+ if(enabled) {
+ Integer key = boxKey(pname);
+ if(null!=key) {
+ pixelStateMap.put(key, boxInt(param));
+ }
+ }
+ }
+
+ public void pushAttrib(int flags) {
+ if(enabled) {
+ SavedState state = new SavedState();
+ if( 0 != (flags&GL_CLIENT_PIXEL_STORE_BIT) ) {
+ state.putPixelStateMap(pixelStateMap);
+ }
+ stack.add(0, state);
+ }
+ }
+
+ public void popAttrib() {
+ if(enabled) {
+ if(stack.size()==0) {
+ throw new GLException("stack contains no elements");
+ }
+ SavedState state = (SavedState) stack.remove(0);
+ if(null==state) {
+ throw new GLException("null stack element (remaining stack size "+stack.size()+")");
+ }
+
+ clearStates();
+
+ if ( null != state.getPixelStateMap() ) {
+ pixelStateMap.putAll(state.getPixelStateMap());
+ }
+ }
+ }
+
+ private static Integer boxKey(int key) {
+ switch (key) {
+ case 0: return zero;
+ case GL.GL_PACK_ALIGNMENT: return GL_PACK_ALIGNMENT;
+ case GL2.GL_PACK_ROW_LENGTH: return GL_PACK_ROW_LENGTH;
+ case GL2.GL_PACK_SKIP_ROWS: return GL_PACK_SKIP_ROWS;
+ case GL2.GL_PACK_SKIP_PIXELS: return GL_PACK_SKIP_PIXELS;
+ case GL2.GL_PACK_IMAGE_HEIGHT: return GL_PACK_IMAGE_HEIGHT;
+ case GL2.GL_PACK_SKIP_IMAGES: return GL_PACK_SKIP_IMAGES;
+
+ case GL.GL_UNPACK_ALIGNMENT: return GL_UNPACK_ALIGNMENT;
+ case GL2.GL_UNPACK_ROW_LENGTH: return GL_UNPACK_ROW_LENGTH;
+ case GL2.GL_UNPACK_SKIP_ROWS: return GL_UNPACK_SKIP_ROWS;
+ case GL2.GL_UNPACK_SKIP_PIXELS: return GL_UNPACK_SKIP_PIXELS;
+ case GL2.GL_UNPACK_IMAGE_HEIGHT: return GL_UNPACK_IMAGE_HEIGHT;
+ case GL2.GL_UNPACK_SKIP_IMAGES: return GL_UNPACK_SKIP_IMAGES;
+
+ default: return null;
+ }
+ }
+
+ private static Integer boxInt(int value) {
+ switch (value) {
+ case 0: return zero;
+
+ default: return new Integer(value);
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 10:45:41 +0000