1430 2023-03-09 16:27:07 +0100 Background erase not disabled with AWT GLCanvas and NewtCanvasAWT 2023-09-29 03:23:10 +0200 1 1 3 JogAmp Jogl awt 2.6.0 All all RESOLVED FIXED P4 normal --- 1 crougier sgothel DEFECT 2e46eb1bf06ef07801062122716aa99a6c871646 TRUE oldest_to_newest 6769 0 856 crougier 2023-03-09 16:27:07 +0100 Created attachment 856 JOGLQuad example As mentioned in the javadoc of com.jogamp.opengl.awt.GLCanvas class, GLCanvas tries to disable background erase for the AWT Canvas. This works well : - on Windows with Java 11 and JOGL 2.3.2 but it does not work : - on Windows with Java 11 and JOGL 2.4.0 (regression) - on Ubuntu with Java 11 and JOGL 2.3.2 or 2.4.0 - on Windows and Ubuntu with Java 17 and JOGL 2.3.2 or 2.4.0 Tested on Windows 10 and Ubuntu 20.04 with OpenJDK 11.0.12+7 and OpenJDK 17.0.6+10. It can be reproduced with the attached JOGLQuad example, the background flickers when canvas is resized. Workaround: setting the "sun.awt.noerasebackground" property to true solves this issue in all cases. 6770 1 crougier 2023-03-09 16:34:53 +0100 Originally discussed here: https://forum.jogamp.org/Resize-flickering-with-AWT-GLCanvas-and-JOGL-2-4-0-td4042181.html 6771 2 sgothel 2023-03-09 17:31:32 +0100 Celine posted in https://forum.jogamp.org/Resize-flickering-with-AWT-GLCanvas-and-JOGL-2-4-0-tp4042181p4042192.html Not really... With JOGL 2.3.2, the sun.awt.windows.WToolkit.disableBackgroundErase(Canvas) is called : @Override public void disableBackgroundErase(Canvas canvas) { WCanvasPeer peer = AWTAccessor.getComponentAccessor().getPeer(canvas); if (peer == null) { throw new IllegalStateException("Canvas must have a valid peer"); } peer.disableBackgroundErase(); } With JOGL 2.4.0, the sun.awt.SunToolkit.disableBackgroundErase(Component component) is called : public void disableBackgroundErase(Component component) { disableBackgroundEraseImpl(component); } private void disableBackgroundEraseImpl(Component component) { AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true); } The regression on Windows platforms may be due to this change. 6896 3 sgothel 2023-09-29 03:23:10 +0200 Commit 2e46eb1bf06ef07801062122716aa99a6c871646: Commit c5431f46b7bf64f109315ec78461859dd88f202a reduced the disableBackgroundErase(..) to SunToolkit's variation which doesn't work on Windows as it does not act upon the java.awt.Canvas peer post addNotify(). This re-introduces the java.awt.Canvas method via class JAWTUtil.BackgroundEraseControl and its called only after addNotify() on Windows and ASAP for everyone else. Method also calles the SunTookit variation just to be sure. 856 2023-03-09 16:27:07 +0100 2023-03-09 16:27:07 +0100 JOGLQuad example JOGLQuad.java text/plain 3239 crougier cGFja2FnZSBqb2dsLnRlc3Q7DQoNCmltcG9ydCBqYXZhLmF3dC5GcmFtZTsNCmltcG9ydCBqYXZh LmF3dC5ldmVudC5XaW5kb3dBZGFwdGVyOw0KaW1wb3J0IGphdmEuYXd0LmV2ZW50LldpbmRvd0V2 ZW50Ow0KDQppbXBvcnQgY29tLmpvZ2FtcC5vcGVuZ2wuR0w7DQppbXBvcnQgY29tLmpvZ2FtcC5v cGVuZ2wuR0wyOw0KaW1wb3J0IGNvbS5qb2dhbXAub3BlbmdsLkdMMkVTMTsNCmltcG9ydCBjb20u am9nYW1wLm9wZW5nbC5HTEF1dG9EcmF3YWJsZTsNCmltcG9ydCBjb20uam9nYW1wLm9wZW5nbC5H TEV2ZW50TGlzdGVuZXI7DQppbXBvcnQgY29tLmpvZ2FtcC5vcGVuZ2wuYXd0LkdMQ2FudmFzOw0K aW1wb3J0IGNvbS5qb2dhbXAub3BlbmdsLmZpeGVkZnVuYy5HTExpZ2h0aW5nRnVuYzsNCmltcG9y dCBjb20uam9nYW1wLm9wZW5nbC5maXhlZGZ1bmMuR0xNYXRyaXhGdW5jOw0KaW1wb3J0IGNvbS5q b2dhbXAub3BlbmdsLnV0aWwuQW5pbWF0b3I7DQoNCi8qKg0KICogU2VsZi1jb250YWluZWQgZXhh bXBsZSAod2l0aGluIGEgc2luZ2xlIGNsYXNzIG9ubHkgdG8ga2VlcCBpdCBzaW1wbGUpDQogKiBk aXNwbGF5aW5nIGEgcm90YXRpbmcgcXVhZA0KICovDQpwdWJsaWMgY2xhc3MgSk9HTFF1YWQgaW1w bGVtZW50cyBHTEV2ZW50TGlzdGVuZXINCnsNCg0KICBwcml2YXRlIGZsb2F0IHJvdGF0ZVQgPSAw LjBmOw0KDQogIEBPdmVycmlkZQ0KICBwdWJsaWMgdm9pZCBkaXNwbGF5KEdMQXV0b0RyYXdhYmxl IGdMRHJhd2FibGUpDQogIHsNCiAgICBmaW5hbCBHTDIgZ2wgPSBnTERyYXdhYmxlLmdldEdMKCku Z2V0R0wyKCk7DQogICAgZ2wuZ2xDbGVhcihHTC5HTF9DT0xPUl9CVUZGRVJfQklUKTsNCiAgICBn bC5nbENsZWFyKEdMLkdMX0RFUFRIX0JVRkZFUl9CSVQpOw0KICAgIGdsLmdsTG9hZElkZW50aXR5 KCk7DQogICAgZ2wuZ2xUcmFuc2xhdGVmKDAuMGYsIDAuMGYsIC01LjBmKTsNCg0KICAgIC8vIHJv dGF0ZSBhYm91dCB0aGUgdGhyZWUgYXhlcw0KICAgIGdsLmdsUm90YXRlZihyb3RhdGVULCAxLjBm LCAwLjBmLCAwLjBmKTsNCiAgICBnbC5nbFJvdGF0ZWYocm90YXRlVCwgMC4wZiwgMS4wZiwgMC4w Zik7DQogICAgZ2wuZ2xSb3RhdGVmKHJvdGF0ZVQsIDAuMGYsIDAuMGYsIDEuMGYpOw0KDQogICAg Ly8gRHJhdyBBIFF1YWQNCiAgICBnbC5nbEJlZ2luKEdMMi5HTF9RVUFEUyk7DQogICAgZ2wuZ2xD b2xvcjNmKDAuMGYsIDEuMGYsIDEuMGYpOyAvLyBzZXQgdGhlIGNvbG9yIG9mIHRoZSBxdWFkDQog ICAgZ2wuZ2xWZXJ0ZXgzZigtMS4wZiwgMS4wZiwgMC4wZik7IC8vIFRvcCBMZWZ0DQogICAgZ2wu Z2xWZXJ0ZXgzZigxLjBmLCAxLjBmLCAwLjBmKTsgLy8gVG9wIFJpZ2h0DQogICAgZ2wuZ2xWZXJ0 ZXgzZigxLjBmLCAtMS4wZiwgMC4wZik7IC8vIEJvdHRvbSBSaWdodA0KICAgIGdsLmdsVmVydGV4 M2YoLTEuMGYsIC0xLjBmLCAwLjBmKTsgLy8gQm90dG9tIExlZnQNCiAgICAvLyBEb25lIERyYXdp bmcgVGhlIFF1YWQNCiAgICBnbC5nbEVuZCgpOw0KDQogICAgLy8gaW5jcmVhc2luZyByb3RhdGlv biBmb3IgdGhlIG5leHQgaXRlcmF0aW9uDQogICAgcm90YXRlVCArPSAwLjJmOw0KICB9DQoNCiAg QE92ZXJyaWRlDQogIHB1YmxpYyB2b2lkIGluaXQoR0xBdXRvRHJhd2FibGUgZ2xEcmF3YWJsZSkN CiAgew0KICAgIEdMMiBnbCA9IGdsRHJhd2FibGUuZ2V0R0woKS5nZXRHTDIoKTsNCiAgICBnbC5n bFNoYWRlTW9kZWwoR0xMaWdodGluZ0Z1bmMuR0xfU01PT1RIKTsNCiAgICBnbC5nbENsZWFyQ29s b3IoMC4wZiwgMC4wZiwgMC4wZiwgMC4wZik7DQogICAgZ2wuZ2xDbGVhckRlcHRoKDEuMGYpOw0K ICAgIGdsLmdsRW5hYmxlKEdMLkdMX0RFUFRIX1RFU1QpOw0KICAgIGdsLmdsRGVwdGhGdW5jKEdM LkdMX0xFUVVBTCk7DQogICAgZ2wuZ2xIaW50KEdMMkVTMS5HTF9QRVJTUEVDVElWRV9DT1JSRUNU SU9OX0hJTlQsIEdMLkdMX05JQ0VTVCk7DQogIH0NCg0KICBAT3ZlcnJpZGUNCiAgcHVibGljIHZv aWQgcmVzaGFwZShHTEF1dG9EcmF3YWJsZSBnTERyYXdhYmxlLCBpbnQgeCwgaW50IHksIGludCB3 aWR0aCwgaW50IGhlaWdodCkNCiAgew0KICAgIEdMMiBnbCA9IGdMRHJhd2FibGUuZ2V0R0woKS5n ZXRHTDIoKTsNCiAgICBmaW5hbCBmbG9hdCBhc3BlY3QgPSAoZmxvYXQpIHdpZHRoIC8gKGZsb2F0 KSBoZWlnaHQ7DQogICAgZ2wuZ2xNYXRyaXhNb2RlKEdMTWF0cml4RnVuYy5HTF9QUk9KRUNUSU9O KTsNCiAgICBnbC5nbExvYWRJZGVudGl0eSgpOw0KICAgIGZpbmFsIGZsb2F0IGZoID0gMC41ZjsN CiAgICBmaW5hbCBmbG9hdCBmdyA9IGZoICogYXNwZWN0Ow0KICAgIGdsLmdsRnJ1c3R1bWYoLWZ3 LCBmdywgLWZoLCBmaCwgMS4wZiwgMTAwMC4wZik7DQogICAgZ2wuZ2xNYXRyaXhNb2RlKEdMTWF0 cml4RnVuYy5HTF9NT0RFTFZJRVcpOw0KICAgIGdsLmdsTG9hZElkZW50aXR5KCk7DQogIH0NCg0K ICBAT3ZlcnJpZGUNCiAgcHVibGljIHZvaWQgZGlzcG9zZShHTEF1dG9EcmF3YWJsZSBnTERyYXdh YmxlKQ0KICB7fQ0KDQogIHB1YmxpYyBzdGF0aWMgdm9pZCBtYWluKFN0cmluZ1tdIGFyZ3MpDQog IHsNCiAgICAvLyBTeXN0ZW0uc2V0UHJvcGVydHkoInN1bi5hd3Qubm9lcmFzZWJhY2tncm91bmQi LCAidHJ1ZSIpOw0KICAgIGZpbmFsIEdMQ2FudmFzIGNhbnZhcyA9IG5ldyBHTENhbnZhcygpOw0K ICAgIGZpbmFsIEZyYW1lIGZyYW1lID0gbmV3IEZyYW1lKCJKb2dsIFF1YWQgZHJhd2luZyIpOw0K ICAgIGZpbmFsIEFuaW1hdG9yIGFuaW1hdG9yID0gbmV3IEFuaW1hdG9yKGNhbnZhcyk7DQogICAg Y2FudmFzLmFkZEdMRXZlbnRMaXN0ZW5lcihuZXcgSk9HTFF1YWQoKSk7DQogICAgZnJhbWUuYWRk KGNhbnZhcyk7DQogICAgZnJhbWUuc2V0U2l6ZSg2NDAsIDQ4MCk7DQogICAgLy8gZnJhbWUuc2V0 UmVzaXphYmxlKGZhbHNlKTsNCiAgICBmcmFtZS5hZGRXaW5kb3dMaXN0ZW5lcihuZXcgV2luZG93 QWRhcHRlcigpDQogICAgew0KICAgICAgQE92ZXJyaWRlDQogICAgICBwdWJsaWMgdm9pZCB3aW5k b3dDbG9zaW5nKFdpbmRvd0V2ZW50IGUpDQogICAgICB7DQogICAgICAgIGFuaW1hdG9yLnN0b3Ao KTsNCiAgICAgICAgZnJhbWUuZGlzcG9zZSgpOw0KICAgICAgICBTeXN0ZW0uZXhpdCgwKTsNCiAg ICAgIH0NCiAgICB9KTsNCiAgICBmcmFtZS5zZXRWaXNpYmxlKHRydWUpOw0KICAgIGFuaW1hdG9y LnN0YXJ0KCk7DQogICAgY2FudmFzLnJlcXVlc3RGb2N1cygpOw0KICB9DQp9DQo=