Moved glBlendEquationSeparate from GL2 interface to GL interface. Added an example of the feature. Minors issues.

jme3-android/src/main/java/com/jme3/renderer/android/AndroidGL.java

@@ -523,4 +523,9 @@ public class AndroidGL implements GL, GLExt, GLFbo {
     public Object glFenceSync(int condition, int flags) {
         throw new UnsupportedOperationException("OpenGL ES 2 does not support sync fences");
     }
+
+    @Override
+    public void glBlendEquationSeparate(int colorMode, int alphaMode) {
+        GLES20.glBlendEquationSeparate(colorMode, alphaMode);
+    }
 }

jme3-core/src/main/java/com/jme3/material/RenderState.java

@@ -1501,7 +1501,7 @@ public class RenderState implements Cloneable, Savable {
         if (additionalState.applyBlendEquationAlpha) {
             state.blendEquationAlpha = additionalState.blendEquationAlpha;
         } else {
-            state.blendEquation = blendEquation;
+            state.blendEquationAlpha = blendEquationAlpha;
         }        
         if (additionalState.applyBlendMode) {
             state.blendMode = additionalState.blendMode;

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

@@ -69,6 +69,9 @@ public interface GL {
 	public static final int GL_EXTENSIONS = 0x1F03;
 	public static final int GL_FALSE = 0x0;
 	public static final int GL_FLOAT = 0x1406;
+    public static final int GL_FUNC_ADD = 0x8006;
+    public static final int GL_FUNC_SUBTRACT = 0x800A;
+    public static final int GL_FUNC_REVERSE_SUBTRACT = 0x800B;
 	public static final int GL_FRAGMENT_SHADER = 0x8B30;
 	public static final int GL_FRONT = 0x404;
 	public static final int GL_FRONT_AND_BACK = 0x408;
@@ -95,6 +98,7 @@ public interface GL {
 	public static final int GL_LINK_STATUS = 0x8B82;
 	public static final int GL_LUMINANCE = 0x1909;
 	public static final int GL_LUMINANCE_ALPHA = 0x190A;
+    public static final int GL_MAX = 0x8008;
 	public static final int GL_MAX_CUBE_MAP_TEXTURE_SIZE = 0x851C;
 	public static final int GL_MAX_TEXTURE_IMAGE_UNITS = 0x8872;
 	public static final int GL_MAX_TEXTURE_SIZE = 0xD33;
@@ -103,6 +107,7 @@ public interface GL {
 	public static final int GL_MAX_VERTEX_UNIFORM_COMPONENTS  = 0x8B4A;
 	public static final int GL_MAX_VERTEX_UNIFORM_VECTORS = 0x8DFB;
 	public static final int GL_MIRRORED_REPEAT = 0x8370;
+    public static final int GL_MIN = 0x8007;
 	public static final int GL_NEAREST = 0x2600;
 	public static final int GL_NEAREST_MIPMAP_LINEAR = 0x2702;
 	public static final int GL_NEAREST_MIPMAP_NEAREST = 0x2700;
@@ -188,6 +193,7 @@ public interface GL {
 	public void glAttachShader(int program, int shader);
 	public void glBindBuffer(int target, int buffer);
 	public void glBindTexture(int target, int texture);
+    public void glBlendEquationSeparate(int colorMode, int alphaMode);
 	public void glBlendFunc(int sfactor, int dfactor);
         public void glBufferData(int target, long data_size, int usage);
 	public void glBufferData(int target, FloatBuffer data, int usage);

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

@@ -71,14 +71,8 @@ public interface GL2 extends GL {
     public static final int GL_TEXTURE_WRAP_R = 0x8072;
     public static final int GL_VERTEX_PROGRAM_POINT_SIZE = 0x8642;
     public static final int GL_UNSIGNED_INT_8_8_8_8 = 0x8035;
-    public static final int GL_FUNC_ADD = 0x8006;
-    public static final int GL_FUNC_SUBTRACT = 0x800A;
-    public static final int GL_FUNC_REVERSE_SUBTRACT = 0x800B;
-    public static final int GL_MIN = 0x8007;
-    public static final int GL_MAX = 0x8008;
     
     public void glAlphaFunc(int func, float ref);
-    public void glBlendEquationSeparate(int colorMode, int alphaMode);
     public void glPointSize(float size);
     public void glPolygonMode(int face, int mode);
     public void glDrawBuffer(int mode);

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

@@ -102,7 +102,7 @@ public class GLDebugDesktop extends GLDebugES implements GL2, GL3, GL4 {
     }
 
     public void glBlendEquationSeparate(int colorMode, int alphaMode) {
-        gl2.glBlendEquationSeparate(colorMode, alphaMode);
+        gl.glBlendEquationSeparate(colorMode, alphaMode);
         checkError();
     }
 }

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

@@ -560,4 +560,9 @@ public class GLDebugES extends GLDebug implements GL, GLFbo, GLExt {
         checkError();
         return sync;
     }
+
+    public void glBlendEquationSeparate(int colorMode, int alphaMode) {
+        gl.glBlendEquationSeparate(colorMode, alphaMode);
+        checkError();
+    }
 }

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

@@ -747,7 +747,7 @@ public final class GLRenderer implements Renderer {
                                 + state.getBlendMode());
                 }
                 
-                if (gl2 != null && (state.getBlendEquation() != context.blendEquation || state.getBlendEquationAlpha() != context.blendEquationAlpha)) {
+                if (state.getBlendEquation() != context.blendEquation || state.getBlendEquationAlpha() != context.blendEquationAlpha) {
                     int colorMode = convertBlendEquation(state.getBlendEquation());
                     int alphaMode;
                     if (state.getBlendEquationAlpha() == RenderState.BlendEquationAlpha.InheritColor) {
@@ -755,8 +755,9 @@ public final class GLRenderer implements Renderer {
                     } else {
                         alphaMode = convertBlendEquationAlpha(state.getBlendEquationAlpha());
                     }
-                    gl2.glBlendEquationSeparate(colorMode, alphaMode);
+                    gl.glBlendEquationSeparate(colorMode, alphaMode);
                     context.blendEquation = state.getBlendEquation();
+                    context.blendEquationAlpha = state.getBlendEquationAlpha();
                 }
             }
 

jme3-examples/src/main/java/jme3test/renderer/TestBlendEquations.java

@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2009-2016 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions 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 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package jme3test.renderer;
+
+import com.jme3.app.SimpleApplication;
+import com.jme3.light.DirectionalLight;
+import com.jme3.material.Material;
+import com.jme3.material.RenderState;
+import com.jme3.math.ColorRGBA;
+import com.jme3.math.Vector3f;
+import com.jme3.renderer.queue.RenderQueue;
+import com.jme3.scene.Geometry;
+import com.jme3.scene.shape.Quad;
+
+public class TestBlendEquations extends SimpleApplication {
+
+    public static void main(String[] args) {
+        TestBlendEquations app = new TestBlendEquations();
+        app.start();
+    }
+
+    public void simpleInitApp() {
+        Geometry teaGeom = (Geometry) assetManager.loadModel("Models/Teapot/Teapot.obj");
+        teaGeom.scale(6);
+        teaGeom.getMaterial().getAdditionalRenderState().setBlendEquation(RenderState.BlendEquation.Add);
+        teaGeom.move(0, -2f, 0);
+
+        DirectionalLight dl = new DirectionalLight();
+        dl.setColor(ColorRGBA.Red);
+        dl.setDirection(Vector3f.UNIT_XYZ.negate());
+
+        rootNode.addLight(dl);
+        rootNode.attachChild(teaGeom);
+
+        Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
+        mat.setColor("Color", new ColorRGBA(0.5f, 0f, 1f, 0.3f));
+        mat.getAdditionalRenderState().setBlendMode(RenderState.BlendMode.Color);
+        mat.getAdditionalRenderState().setBlendEquation(RenderState.BlendEquation.Subtract);
+
+        Geometry geo = new Geometry("BottomLeft", new Quad(guiViewPort.getCamera().getWidth() / 2, guiViewPort.getCamera().getHeight() / 2));
+        geo.setMaterial(mat);
+        geo.setQueueBucket(RenderQueue.Bucket.Gui);
+        geo.setLocalTranslation(0, 0, 1);
+
+        guiNode.attachChild(geo);
+
+        Material m = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
+        m.getAdditionalRenderState().setBlendEquation(RenderState.BlendEquation.ReverseSubtract);
+        m.setColor("Color", new ColorRGBA(0.0f, 1f, 1.f, 1f));
+        m.getAdditionalRenderState().setBlendMode(RenderState.BlendMode.AlphaAdditive);
+
+        geo = new Geometry("BottomRight", new Quad(guiViewPort.getCamera().getWidth() / 2, guiViewPort.getCamera().getHeight() / 2));
+        geo.setMaterial(m);
+        geo.setQueueBucket(RenderQueue.Bucket.Gui);
+        geo.setLocalTranslation(guiViewPort.getCamera().getWidth() / 2, 0, 1);
+        
+        guiNode.attachChild(geo);
+        
+        m = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
+        m.getAdditionalRenderState().setBlendEquation(RenderState.BlendEquation.Min);
+        m.setColor("Color", new ColorRGBA(0.3f, 0f, 0.1f, 0.3f));
+        m.getAdditionalRenderState().setBlendMode(RenderState.BlendMode.Additive);
+
+        geo = new Geometry("TopRight", new Quad(guiViewPort.getCamera().getWidth() / 2, guiViewPort.getCamera().getHeight() / 2));
+        geo.setMaterial(m);
+        geo.setQueueBucket(RenderQueue.Bucket.Gui);
+        geo.setLocalTranslation(guiViewPort.getCamera().getWidth() / 2, guiViewPort.getCamera().getHeight() / 2, 1);
+
+        guiNode.attachChild(geo);
+
+        geo = new Geometry("OverTeaPot", new Quad(guiViewPort.getCamera().getWidth() / 2, guiViewPort.getCamera().getHeight() / 2));
+        geo.setMaterial(mat);
+        geo.setQueueBucket(RenderQueue.Bucket.Transparent);
+        geo.setLocalTranslation(0, -100, 5);
+
+        rootNode.attachChild(geo);
+
+    }
+
+
+}

jme3-ios/src/main/java/com/jme3/renderer/ios/IosGL.java

@@ -78,6 +78,11 @@ public class IosGL implements GL, GLExt, GLFbo {
         checkLimit(buffer);
         return buffer.limit() / elementSize;
     }
+
+    @Override
+    public void glBlendEquationSeparate(int colorMode, int alphaMode) {
+        JmeIosGLES.glBlendEquationSeparate(colorMode, alphaMode);
+    }
     
     private int toArray(IntBuffer buffer) {
         int remain = buffer.remaining();

jme3-ios/src/main/java/com/jme3/renderer/ios/JmeIosGLES.java

@@ -142,6 +142,7 @@ public class JmeIosGLES {
 	public static native void glBindRenderbuffer(int target, int renderbuffer);
 	public static native void glBindTexture(int target, int texture);
 //	public static native void glBindVertexArray // TODO: Investigate this 
+    public static native void glBlendEquationSeparate(int colorMode, int alphaMode);
 	public static native void glBlendFunc(int sfactor, int dfactor);
 	public static native void glBufferData(int target, int size, Buffer data, int usage);
 	public static native void glBufferData2(int target, int size, byte[] data, int offset, int usage);