2 files changed, 57 insertions, 17 deletions

diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLPixelBuffer.java b/src/jogl/classes/com/jogamp/opengl/util/GLPixelBuffer.java
index b2e0af2b5..6b9d3bf2c 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/GLPixelBuffer.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/GLPixelBuffer.java
@@ -74,6 +74,18 @@ public class GLPixelBuffer {
          */
         GLPixelBuffer allocate(GL gl, GLPixelAttributes pixelAttributes, int width, int height, int depth, boolean pack, int minByteSize);
     }
+
+    /** Single {@link GLPixelBuffer} provider. */ 
+    public static interface SingletonGLPixelBufferProvider extends GLPixelBufferProvider {
+        /** Return the last {@link #allocate(GL, GLPixelAttributes, int, int, int, boolean, int) allocated} {@link GLPixelBuffer} w/ {@link GLPixelAttributes#componentCount}. */ 
+        GLPixelBuffer getSingleBuffer(GLPixelAttributes pixelAttributes);
+        /** 
+         * Initializes the single {@link GLPixelBuffer} w/ a given size, if not yet {@link #allocate(GL, GLPixelAttributes, int, int, int, boolean, int) allocated}.
+         * @return the newly initialized single {@link GLPixelBuffer}, or null if already allocated.
+         */
+        GLPixelBuffer initSingleton(int componentCount, int width, int height, int depth, boolean pack);        
+    }
+
     /** 
      * Default {@link GLPixelBufferProvider} utilizing best match for {@link GLPixelAttributes}
      * and {@link GLPixelBufferProvider#allocate(GL, GLPixelAttributes, int, int, int, boolean, int) allocating} a {@link ByteBuffer}.
@@ -118,7 +130,7 @@ public class GLPixelBuffer {
         /** Undefined instance of {@link GLPixelAttributes}, having componentCount:=0, format:=0 and type:= 0. */ 
         public static final GLPixelAttributes UNDEF = new GLPixelAttributes(0, 0, 0);
         
-        /** Pixel component count */
+        /** Pixel <i>source</i> component count, i.e. number of meaningful components. */
         public final int componentCount;
         /** The OpenGL pixel data format */
         public final int format;
@@ -175,12 +187,14 @@ public class GLPixelBuffer {
     /** Buffer element size in bytes. */
     public final int bufferElemSize;
     
+    private boolean disposed = false;
+    
     public StringBuffer toString(StringBuffer sb) {
         if(null == sb) {
             sb = new StringBuffer();
         }
         sb.append(pixelAttributes).append(", dim ").append(width).append("x").append(height).append("x").append(depth).append(", pack ").append(pack)
-        .append(", buffer[sz [bytes ").append(byteSize).append(", elemSize ").append(bufferElemSize).append(", ").append(buffer).append("]");
+        .append(", disposed ").append(disposed).append(", valid ").append(isValid()).append(", buffer[sz [bytes ").append(byteSize).append(", elemSize ").append(bufferElemSize).append(", ").append(buffer).append("]");
         return sb;
     }
     public String toString() {
@@ -198,8 +212,9 @@ public class GLPixelBuffer {
         this.bufferElemSize = Buffers.sizeOfBufferElem(buffer);
     }
     
+    /** Is not {@link #dispose()} and has {@link #byteSize} &gt; 0. */
     public boolean isValid() {
-        return 0 < byteSize;
+        return !disposed && 0 < byteSize;
     }
     
     public Buffer rewind() {
@@ -226,7 +241,7 @@ public class GLPixelBuffer {
     
     /** 
      * Returns true, if implementation requires a new buffer based on the new size
-     * due to pixel alignment or byte size, otherwise false.
+     * due to pixel alignment or byte size or if {@link #isValid() invalid}, otherwise false.
      * <p>
      * It is assumed that <code>pixelAttributes</code>, <code>depth</code> and <code>pack</code> stays the same!
      * </p>
@@ -242,7 +257,7 @@ public class GLPixelBuffer {
      * @see GLPixelBufferProvider#allocate(GL, GLPixelAttributes, int, int, int, boolean, int)
      */
     public boolean requiresNewBuffer(GL gl, int newWidth, int newHeight, int minByteSize) {
-        return this.byteSize < minByteSize;
+        return !isValid() || this.byteSize < minByteSize;
     }
     
     /** Dispose resources. */
diff --git a/src/jogl/classes/com/jogamp/opengl/util/awt/AWTGLPixelBuffer.java b/src/jogl/classes/com/jogamp/opengl/util/awt/AWTGLPixelBuffer.java
index 2af48cefd..aceb609a1 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/awt/AWTGLPixelBuffer.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/awt/AWTGLPixelBuffer.java
@@ -54,7 +54,8 @@ import com.jogamp.opengl.util.GLPixelBuffer.GLPixelAttributes;
  * </p>
  */
 public class AWTGLPixelBuffer extends GLPixelBuffer {
-    public static final GLPixelAttributes awtPixelAttributesIntRGB = new GLPixelAttributes(GL.GL_BGRA, GL.GL_UNSIGNED_BYTE);
+    public static final GLPixelAttributes awtPixelAttributesIntRGBA4 = new GLPixelAttributes(4, GL.GL_BGRA, GL.GL_UNSIGNED_BYTE);
+    public static final GLPixelAttributes awtPixelAttributesIntRGB3 = new GLPixelAttributes(3, GL.GL_BGRA, GL.GL_UNSIGNED_BYTE);
 
     /** Allow {@link GL2GL3#GL_PACK_ROW_LENGTH}, or {@link GL2GL3#GL_UNPACK_ROW_LENGTH}. See {@link #requiresNewBuffer(GL, int, int, int)}. */
     public final boolean allowRowStride;
@@ -92,6 +93,9 @@ public class AWTGLPixelBuffer extends GLPixelBuffer {
      */
     @Override
     public boolean requiresNewBuffer(GL gl, int newWidth, int newHeight, int minByteSize) {
+        if( !isValid() ) {
+            return true;
+        }
         if( allowRowStride && gl.isGL2GL3() ) {
             return width < newWidth || height < newHeight;
         } else {
@@ -129,7 +133,7 @@ public class AWTGLPixelBuffer extends GLPixelBuffer {
         }
         @Override
         public GLPixelAttributes getAttributes(GL gl, int componentCount) {
-            return awtPixelAttributesIntRGB;
+            return 4 == componentCount ? awtPixelAttributesIntRGBA4 : awtPixelAttributesIntRGB3;
         }
             
         /**
@@ -157,8 +161,9 @@ public class AWTGLPixelBuffer extends GLPixelBuffer {
      * The latter is true if size are compatible, hence <code>allowRowStride</code> should be enabled, if possible. 
      * </p>
      */    
-    public static class SingleAWTGLPixelBufferProvider extends AWTGLPixelBufferProvider {
-        private AWTGLPixelBuffer single = null;
+    public static class SingleAWTGLPixelBufferProvider extends AWTGLPixelBufferProvider implements SingletonGLPixelBufferProvider {
+        private AWTGLPixelBuffer singleRGBA4 = null;
+        private AWTGLPixelBuffer singleRGB3 = null;
         
         /**
          * @param allowRowStride If <code>true</code>, allow row-stride, otherwise not. See {@link AWTGLPixelBuffer#requiresNewBuffer(GL, int, int, int)}.
@@ -175,10 +180,17 @@ public class AWTGLPixelBuffer extends GLPixelBuffer {
          */
         @Override
         public AWTGLPixelBuffer allocate(GL gl, GLPixelAttributes pixelAttributes, int width, int height, int depth, boolean pack, int minByteSize) {
-            if( null == single || single.requiresNewBuffer(gl, width, height, minByteSize) ) {
-                single = allocateImpl(pixelAttributes, width, height, depth, pack, minByteSize); 
+            if( 4 == pixelAttributes.componentCount ) {
+                if( null == singleRGBA4 || singleRGBA4.requiresNewBuffer(gl, width, height, minByteSize) ) {
+                    singleRGBA4 = allocateImpl(pixelAttributes, width, height, depth, pack, minByteSize); 
+                }
+                return singleRGBA4;
+            } else {
+                if( null == singleRGB3 || singleRGB3.requiresNewBuffer(gl, width, height, minByteSize) ) {
+                    singleRGB3 = allocateImpl(pixelAttributes, width, height, depth, pack, minByteSize);
+                }
+                return singleRGB3;
             }
-            return single;
         }
         
         private AWTGLPixelBuffer allocateImpl(GLPixelAttributes pixelAttributes, int width, int height, int depth, boolean pack, int minByteSize) {
@@ -188,16 +200,29 @@ public class AWTGLPixelBuffer extends GLPixelBuffer {
             return new AWTGLPixelBuffer(pixelAttributes, width, height, depth, pack, image, ibuffer, allowRowStride);
         }
         
+        /** Return the last {@link #allocate(GL, GLPixelAttributes, int, int, int, boolean, int) allocated} {@link AWTGLPixelBuffer} w/ {@link GLPixelAttributes#componentCount}. */ 
+        public AWTGLPixelBuffer getSingleBuffer(GLPixelAttributes pixelAttributes) {
+            return 4 == pixelAttributes.componentCount ? singleRGBA4 : singleRGB3;
+        }
+        
         /** 
          * Initializes the single {@link AWTGLPixelBuffer} w/ a given size, if not yet {@link #allocate(GL, GLPixelAttributes, int, int, int, boolean, int) allocated}.
          * @return the newly initialized single {@link AWTGLPixelBuffer}, or null if already allocated.
          */
-        public AWTGLPixelBuffer initSingleton(int width, int height, int depth, boolean pack) {
-            if( null != single ) {
-                return null; 
+        public AWTGLPixelBuffer initSingleton(int componentCount, int width, int height, int depth, boolean pack) {
+            if( 4 == componentCount ) {
+                if( null != singleRGBA4 ) {
+                    return null; 
+                }
+                singleRGBA4 = allocateImpl(AWTGLPixelBuffer.awtPixelAttributesIntRGBA4, width, height, depth, pack, 0);
+                return singleRGBA4;
+            } else {
+                if( null != singleRGB3 ) {
+                    return null; 
+                }
+                singleRGB3 = allocateImpl(AWTGLPixelBuffer.awtPixelAttributesIntRGB3, width, height, depth, pack, 0);
+                return singleRGB3;
             }
-            single = allocateImpl(AWTGLPixelBuffer.awtPixelAttributesIntRGB, width, height, depth, pack, 0);
-            return single;
         }
     }
 }
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