From 0af526b49afab7eae057421c57d7b68deab96d07 Mon Sep 17 00:00:00 2001
From: "remy.bouquet@gmail.com"
 <remy.bouquet@gmail.com@75d07b2b-3a1a-0410-a2c5-0572b91ccdca>
Date: Tue, 14 Jun 2011 17:10:21 +0000
Subject: [PATCH] WateFilter depth write fix (yeah 'fix' Kirill). Issue was
 glClear(GL_DEPTH_BUFFER_BIT) seems to not work when glDepthMask is false see
 http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=257223
 Also there might be the same issue when copying frame buffers

git-svn-id: http://jmonkeyengine.googlecode.com/svn/trunk@7628 75d07b2b-3a1a-0410-a2c5-0572b91ccdca
---
 engine/src/core/com/jme3/post/FilterPostProcessor.java      |  9 +++------
 .../lwjgl-ogl/com/jme3/renderer/lwjgl/LwjglRenderer.java    | 13 +++++++++++--
 2 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/engine/src/core/com/jme3/post/FilterPostProcessor.java b/engine/src/core/com/jme3/post/FilterPostProcessor.java
index b35c00a6f..62841cb42 100644
--- a/engine/src/core/com/jme3/post/FilterPostProcessor.java
+++ b/engine/src/core/com/jme3/post/FilterPostProcessor.java
@@ -185,12 +185,12 @@ public class FilterPostProcessor implements SceneProcessor, Savable {
             filterCam.resize(buff.getWidth(), buff.getHeight(), true);
             fsQuad.setPosition(0, 0);
         }
-        
+
         if (mat.getAdditionalRenderState().isDepthWrite()) {
             mat.getAdditionalRenderState().setDepthTest(false);
             mat.getAdditionalRenderState().setDepthWrite(false);
         }
-            
+
         fsQuad.setMaterial(mat);
         fsQuad.updateGeometricState();
 
@@ -198,10 +198,7 @@ public class FilterPostProcessor implements SceneProcessor, Savable {
         r.setFrameBuffer(buff);
         r.clearBuffers(false, true, true);
         renderManager.renderGeometry(fsQuad);
-        
-        //re applying default render state at the end of the render 
-        // to avoid depth write issues, MUST BE A BETTER WAY
-        r.applyRenderState(RenderState.DEFAULT);
+
     }
 
     public boolean isInitialized() {
diff --git a/engine/src/lwjgl-ogl/com/jme3/renderer/lwjgl/LwjglRenderer.java b/engine/src/lwjgl-ogl/com/jme3/renderer/lwjgl/LwjglRenderer.java
index 55deba25e..aa4ab978a 100644
--- a/engine/src/lwjgl-ogl/com/jme3/renderer/lwjgl/LwjglRenderer.java
+++ b/engine/src/lwjgl-ogl/com/jme3/renderer/lwjgl/LwjglRenderer.java
@@ -456,6 +456,15 @@ public class LwjglRenderer implements Renderer {
             bits = GL_COLOR_BUFFER_BIT;
         }
         if (depth) {
+            
+            //glClear(GL_DEPTH_BUFFER_BIT) seems to not work when glDepthMask is false
+            //here s some link on openl board
+            //http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=257223
+            //if depth clear is requested, we enable the depthMask            
+            if (context.depthWriteEnabled == false) {
+                glDepthMask(true);
+                context.depthWriteEnabled = true;
+            }
             bits |= GL_DEPTH_BUFFER_BIT;
         }
         if (stencil) {
@@ -548,7 +557,7 @@ public class LwjglRenderer implements Renderer {
                 context.polyOffsetUnits = 0;
             }
         }
-        
+
         if (state.getFaceCullMode() != context.cullMode) {
             if (state.getFaceCullMode() == RenderState.FaceCullMode.Off) {
                 glDisable(GL_CULL_FACE);
@@ -700,7 +709,7 @@ public class LwjglRenderer implements Renderer {
                 throw new UnsupportedOperationException("Unrecognized test function: " + testFunc);
         }
     }
-    
+
     /*********************************************************************\
     |* Camera and World transforms                                       *|
     \*********************************************************************/
-- 
2.11.0