xrWebGLLayer_framebuffer_scale.https.html (2297B)
1 <!DOCTYPE html> 2 <script src="/resources/testharness.js"></script> 3 <script src="/resources/testharnessreport.js"></script> 4 <script src="resources/webxr_util.js"></script> 5 <script src="resources/webxr_test_constants.js"></script> 6 7 <script> 8 9 let testName = "Ensure framebuffer scaling works as expected."; 10 11 let fakeDeviceInitParams = TRACKED_IMMERSIVE_DEVICE; 12 13 let testFunction = 14 (session, fakeDeviceController, t, sessionObjects) => new Promise((resolve, reject) => { 15 let gl = sessionObjects.gl; 16 let webglLayer = sessionObjects.glLayer; 17 let defaultFramebufferWidth = webglLayer.framebufferWidth; 18 let defaultFramebufferHeight = webglLayer.framebufferHeight; 19 let nativeScale = XRWebGLLayer.getNativeFramebufferScaleFactor(session); 20 21 t.step(() => { 22 // Ensure the framebuffer default sizes and native scale are all non-zero. 23 assert_greater_than(defaultFramebufferWidth, 0); 24 assert_greater_than(defaultFramebufferHeight, 0); 25 assert_greater_than(nativeScale, 0); 26 27 // The native scale should be the inverse for the default framebuffer scale. 28 assert_approx_equals(nativeScale, 1/fakeDeviceController.defaultFramebufferScale_, FLOAT_EPSILON); 29 }); 30 31 webglLayer = new XRWebGLLayer(session, gl, { framebufferScaleFactor: nativeScale }); 32 t.step(() => { 33 // Ensure that requesting a native scale framebuffer gives the expected result. 34 assert_approx_equals(webglLayer.framebufferWidth, defaultFramebufferWidth*nativeScale, 2); 35 assert_approx_equals(webglLayer.framebufferHeight, defaultFramebufferHeight*nativeScale, 2); 36 }); 37 38 webglLayer = new XRWebGLLayer(session, gl, { framebufferScaleFactor: 0 }); 39 t.step(() => { 40 // Ensure that the framebuffer has a lower bounds clamp. 41 assert_greater_than(webglLayer.framebufferWidth, 0); 42 assert_greater_than(webglLayer.framebufferHeight, 0); 43 }); 44 45 webglLayer = new XRWebGLLayer(session, gl, { framebufferScaleFactor: 100 }); 46 t.step(() => { 47 // Ensure that the framebuffer has a reasonable upper bounds clamp. 48 assert_less_than(webglLayer.framebufferWidth, defaultFramebufferWidth*100); 49 assert_less_than(webglLayer.framebufferHeight, defaultFramebufferHeight*100); 50 }); 51 52 resolve(); 53 }); 54 55 xr_session_promise_test( 56 testName, testFunction, fakeDeviceInitParams, 'immersive-vr'); 57 58 </script>