Add TextureSequence.isTextureAvailable(), allowing triggering action only when source becomes ready

3 files changed, 14 insertions, 0 deletions

diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/TextureSequence.java b/src/jogl/classes/com/jogamp/opengl/util/texture/TextureSequence.java
index ab9d1f8f0..88f40e927 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/texture/TextureSequence.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/texture/TextureSequence.java
@@ -174,6 +174,12 @@ public interface TextureSequence {
     public int[] getTextureWrapST();
 
     /**
+     * Returns true if texture source is ready <i>and</i> a texture is available
+     * via {@link #getNextTexture(GL)} and {@link #getLastTexture()}.
+     */
+    public boolean isTextureAvailable();
+
+    /**
      * Returns the last updated texture.
      * <p>
      * In case the instance is just initialized, it shall return a <code>TextureFrame</code>
diff --git a/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java b/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
index 6a0e0061f..63bb22d80 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
@@ -737,6 +737,11 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
     }
 
     @Override
+    public final boolean isTextureAvailable() {
+        return State.Paused == state || State.Playing == state;
+    }
+
+    @Override
     public final TextureFrame getLastTexture() throws IllegalStateException {
         if( State.Paused != state && State.Playing != state ) {
             throw new IllegalStateException("Instance not paused or playing: "+this);
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/demos/TextureSequenceDemo01.java b/src/test/com/jogamp/opengl/test/junit/jogl/demos/TextureSequenceDemo01.java
index b015aebba..7034f2c67 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/demos/TextureSequenceDemo01.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/demos/TextureSequenceDemo01.java
@@ -77,6 +77,9 @@ public class TextureSequenceDemo01 implements TextureSequence {
     }
 
     @Override
+    public boolean isTextureAvailable() { return true; }
+
+    @Override
     public TextureSequence.TextureFrame getLastTexture() throws IllegalStateException {
         return frame; // may return null
     }