diff options
Diffstat (limited to 'src/jogl/classes/com/jogamp/opengl')
| -rw-r--r-- | src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java b/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java index a2978d6d5..c19bb12e9 100644 --- a/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java +++ b/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java @@ -149,6 +149,37 @@ public class GLDrawableUtil { } /** + * Return a heuristic value whether switching the {@link GLContext} is safe between {@lin GLAutoDrawable}s, + * i.e. via {@link #swapGLContext(GLAutoDrawable, GLAutoDrawable)} or {@link #swapGLContextAndAllGLEventListener(GLAutoDrawable, GLAutoDrawable)}. + * <p> + * Method currently returns <code>false</code> if: + * <ul> + * <li>Switching between on- and offscreen and one of the following is <code>true</code>: + * <ul> + * <li>{@link GLCapabilitiesImmutable#getSampleBuffers() MSAA is used}[1], or + * <li>{@link GLCapabilitiesImmutable#getStereo() Stereo is used} + * </ul></li> + * </ul> + * Otherwise method returns <code>true</code> + * </p> + * <p> + * [1] See Bug 830: swapGLContextAndAllGLEventListener and onscreen MSAA w/ NV/GLX + * </p> + */ + public static boolean isSwapGLContextSafe(final GLCapabilitiesImmutable a, final GLCapabilitiesImmutable b) { + if( ( a.isOnscreen() && !b.isOnscreen() || !a.isOnscreen() && b.isOnscreen() ) && // switching between on- and offscreen + ( + ( a.getSampleBuffers() || b.getSampleBuffers() ) || // MSAA involved + ( a.getStereo() || b.getStereo() ) // Stereo involved + ) + ) + { + return false; + } else { + return true; + } + } + /** * Swaps the {@link GLContext} and all {@link GLEventListener} between {@link GLAutoDrawable} <code>a</code> and <code>b</code>, * while preserving it's initialized state, resets the GL-Viewport and issuing {@link GLEventListener#reshape(GLAutoDrawable, int, int, int, int) reshape(..)}. * <p> |