GLRenderer: cleanup to shadow compare mode

Store compare mode in LastTextureState instead of on Texture object

jme3-core/src/main/java/com/jme3/renderer/opengl/GL2.java

@@ -44,7 +44,7 @@ public interface GL2 extends GL {
     public static final int GL_ALPHA_TEST = 0xBC0;
     public static final int GL_BGR = 0x80E0;
     public static final int GL_BGRA = 0x80E1;
-    public static final int GL_COMPARE_R_TO_TEXTURE = 0x884E;
+    public static final int GL_COMPARE_REF_TO_TEXTURE = 0x884E;
     public static final int GL_DEPTH_COMPONENT24 = 0x81A6;
     public static final int GL_DEPTH_COMPONENT32 = 0x81A7;
     public static final int GL_DEPTH_TEXTURE_MODE = 0x884B;

jme3-core/src/main/java/com/jme3/renderer/opengl/GLRenderer.java

@@ -51,7 +51,9 @@ import com.jme3.texture.FrameBuffer;
 import com.jme3.texture.FrameBuffer.RenderBuffer;
 import com.jme3.texture.Image;
 import com.jme3.texture.Texture;
+import com.jme3.texture.Texture.ShadowCompareMode;
 import com.jme3.texture.Texture.WrapAxis;
+import com.jme3.texture.image.LastTextureState;
 import com.jme3.util.BufferUtils;
 import com.jme3.util.ListMap;
 import com.jme3.util.MipMapGenerator;
@@ -1842,77 +1844,71 @@ public class GLRenderer implements Renderer {
         int target = convertTextureType(tex.getType(), image != null ? image.getMultiSamples() : 1, -1);
 
         boolean haveMips = true;
-
         if (image != null) {
             haveMips = image.isGeneratedMipmapsRequired() || image.hasMipmaps();
         }
+        
+        LastTextureState curState = image.getLastTextureState();
 
-        // filter things
-        if (image.getLastTextureState().magFilter != tex.getMagFilter()) {
-            int magFilter = convertMagFilter(tex.getMagFilter());
+        if (curState.magFilter != tex.getMagFilter()) {
             bindTextureAndUnit(target, image, unit);
-            gl.glTexParameteri(target, GL.GL_TEXTURE_MAG_FILTER, magFilter);
-            image.getLastTextureState().magFilter = tex.getMagFilter();
+            gl.glTexParameteri(target, GL.GL_TEXTURE_MAG_FILTER, convertMagFilter(tex.getMagFilter()));
+            curState.magFilter = tex.getMagFilter();
         }
-        if (image.getLastTextureState().minFilter != tex.getMinFilter()) {
-            int minFilter = convertMinFilter(tex.getMinFilter(), haveMips);
+        if (curState.minFilter != tex.getMinFilter()) {
             bindTextureAndUnit(target, image, unit);
-            gl.glTexParameteri(target, GL.GL_TEXTURE_MIN_FILTER, minFilter);
-            image.getLastTextureState().minFilter = tex.getMinFilter();
+            gl.glTexParameteri(target, GL.GL_TEXTURE_MIN_FILTER, convertMinFilter(tex.getMinFilter(), haveMips));
+            curState.minFilter = tex.getMinFilter();
         }
         if (caps.contains(Caps.TextureFilterAnisotropic)
-                && image.getLastTextureState().anisoFilter != tex.getAnisotropicFilter()) {
+                && curState.anisoFilter != tex.getAnisotropicFilter()) {
             bindTextureAndUnit(target, image, unit);
             gl.glTexParameterf(target,
                     GLExt.GL_TEXTURE_MAX_ANISOTROPY_EXT,
                     tex.getAnisotropicFilter());
-            image.getLastTextureState().anisoFilter = tex.getAnisotropicFilter();
+            curState.anisoFilter = tex.getAnisotropicFilter();
         }
 
-        // repeat modes
         switch (tex.getType()) {
             case ThreeDimensional:
             case CubeMap: // cubemaps use 3D coords
-                if (gl2 != null && image.getLastTextureState().rWrap != tex.getWrap(WrapAxis.R)) {
+                if (gl2 != null && curState.rWrap != tex.getWrap(WrapAxis.R)) {
                     bindTextureAndUnit(target, image, unit);
                     gl2.glTexParameteri(target, GL2.GL_TEXTURE_WRAP_R, convertWrapMode(tex.getWrap(WrapAxis.R)));
-                    image.getLastTextureState().rWrap = tex.getWrap(WrapAxis.R);
+                    curState.rWrap = tex.getWrap(WrapAxis.R);
                 }
                 //There is no break statement on purpose here
             case TwoDimensional:
             case TwoDimensionalArray:
-                if (image.getLastTextureState().tWrap != tex.getWrap(WrapAxis.T)) {
+                if (curState.tWrap != tex.getWrap(WrapAxis.T)) {
                     bindTextureAndUnit(target, image, unit);
                     gl.glTexParameteri(target, GL.GL_TEXTURE_WRAP_T, convertWrapMode(tex.getWrap(WrapAxis.T)));
                     image.getLastTextureState().tWrap = tex.getWrap(WrapAxis.T);
                 }
-                if (image.getLastTextureState().sWrap != tex.getWrap(WrapAxis.S)) {
+                if (curState.sWrap != tex.getWrap(WrapAxis.S)) {
                     bindTextureAndUnit(target, image, unit);
                     gl.glTexParameteri(target, GL.GL_TEXTURE_WRAP_S, convertWrapMode(tex.getWrap(WrapAxis.S)));
-                    image.getLastTextureState().sWrap = tex.getWrap(WrapAxis.S);
+                    curState.sWrap = tex.getWrap(WrapAxis.S);
                 }
                 break;
             default:
                 throw new UnsupportedOperationException("Unknown texture type: " + tex.getType());
         }
 
-        if (tex.isNeedCompareModeUpdate() && gl2 != null) {
-            // R to Texture compare mode
-            if (tex.getShadowCompareMode() != Texture.ShadowCompareMode.Off) {
-                bindTextureAndUnit(target, image, unit);
-                gl2.glTexParameteri(target, GL2.GL_TEXTURE_COMPARE_MODE, GL2.GL_COMPARE_R_TO_TEXTURE);
-                gl2.glTexParameteri(target, GL2.GL_DEPTH_TEXTURE_MODE, GL2.GL_INTENSITY);
-                if (tex.getShadowCompareMode() == Texture.ShadowCompareMode.GreaterOrEqual) {
+        ShadowCompareMode texCompareMode = tex.getShadowCompareMode();
+        if (gl2 != null && curState.shadowCompareMode != texCompareMode) {
+            bindTextureAndUnit(target, image, unit);
+            if (texCompareMode != ShadowCompareMode.Off) {
+                gl2.glTexParameteri(target, GL2.GL_TEXTURE_COMPARE_MODE, GL2.GL_COMPARE_REF_TO_TEXTURE);
+                if (texCompareMode == ShadowCompareMode.GreaterOrEqual) {
                     gl2.glTexParameteri(target, GL2.GL_TEXTURE_COMPARE_FUNC, GL.GL_GEQUAL);
                 } else {
                     gl2.glTexParameteri(target, GL2.GL_TEXTURE_COMPARE_FUNC, GL.GL_LEQUAL);
                 }
             } else {
-                bindTextureAndUnit(target, image, unit);
-                //restoring default value
                 gl2.glTexParameteri(target, GL2.GL_TEXTURE_COMPARE_MODE, GL.GL_NONE);
             }
-            tex.compareModeUpdated();
+            curState.shadowCompareMode = texCompareMode;
         }
         
         // If at this point we didn't bind the texture, bind it now

jme3-core/src/main/java/com/jme3/texture/Texture.java

@@ -316,7 +316,6 @@ public abstract class Texture implements CloneableSmartAsset, Savable, Cloneable
     private MinFilter minificationFilter = MinFilter.BilinearNoMipMaps;
     private MagFilter magnificationFilter = MagFilter.Bilinear;
     private ShadowCompareMode shadowCompareMode = ShadowCompareMode.Off;
-    private boolean needCompareModeUpdate = false;
     private int anisotropicFilter;
 
     /**
@@ -404,7 +403,6 @@ public abstract class Texture implements CloneableSmartAsset, Savable, Cloneable
                     "compareMode can not be null.");
         }
         this.shadowCompareMode = compareMode;
-        needCompareModeUpdate = true;
     }
 
     /**
@@ -489,7 +487,7 @@ public abstract class Texture implements CloneableSmartAsset, Savable, Cloneable
     /**
      * @return the anisotropic filtering level for this texture. Default value
      * is 0 (use value from config), 
-     * 1 means 1x (no anisotrophy), 2 means x2, 4 is x4, etc.
+     * 1 means 1x (no anisotropy), 2 means x2, 4 is x4, etc.
      */
     public int getAnisotropicFilter() {
         return anisotropicFilter;
@@ -636,14 +634,4 @@ public abstract class Texture implements CloneableSmartAsset, Savable, Cloneable
         magnificationFilter = capsule.readEnum("magnificationFilter",
                 MagFilter.class, MagFilter.Bilinear);
     }
-
-    public boolean isNeedCompareModeUpdate() {
-        return needCompareModeUpdate;
-    }
-
-    public void compareModeUpdated() {
-        this.needCompareModeUpdate = false;
-    }
-    
-    
 }

jme3-core/src/main/java/com/jme3/texture/image/LastTextureState.java

@@ -45,10 +45,11 @@ public final class LastTextureState {
     public Texture.WrapMode sWrap, tWrap, rWrap;
     public Texture.MagFilter magFilter;
     public Texture.MinFilter minFilter;
-    public int anisoFilter = 0;
+    public int anisoFilter;
+    public Texture.ShadowCompareMode shadowCompareMode;
     
     public LastTextureState() {
-        // All parameters initialized to null (meaning unset).
+        reset();
     }
     
     public void reset() {
@@ -58,5 +59,9 @@ public final class LastTextureState {
         magFilter = null;
         minFilter = null;
         anisoFilter = 0;
+        
+        // The default in OpenGL is OFF, so we avoid setting this per texture
+        // if its not used.
+        shadowCompareMode = Texture.ShadowCompareMode.Off;
     }
 }