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products/Sources/formale Sprachen/C/Firefox/dom/vr/test/reftest/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 5 kB

Quelle change_size.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/dom/vr/test/reftest/change_size.html

<!DOCTYPE html>
<meta charset='UTF-8'>

<html class="reftest-wait">
<head>
  <script type='text/javascript' src='webgl-util.js'></script>
  <script type='text/javascript' src="VRSimulationDriver.js"></script>
  <script id="vs" type="x-shader/x-vertex">
    attribute vec2 aVertCoord;

    void main(void) {
      gl_Position = vec4(aVertCoord, 0.0, 1.0);
    }
  </script>
  <script id="fs" type="x-shader/x-fragment">
    precision mediump float;

    void main(void) {
      gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
    }
  </script>
  <script type='text/javascript'>
    'use strict';

    var submitResult = null;
    var vrDisplay = null;
    var webglCanvas = null;
    var gl = null;
    var prog = null;
    var img = null;
    // The resolution is 540 : 300 (the ratio of 2160 * 1200, like Vive and Oculus)
    const eyeWidth = 270;
    const eyeHeight = 300;

    function setStatus(text) {
      var elem = document.getElementById('status');
      elem.innerHTML = text;
    }

    function initVRMock() {
      VRServiceTest = navigator.requestVRServiceTest();
      if (!VRServiceTest) {
        setStatus('VRServiceTest get failed.');
        return;
      }

      VRSimulationDriver.AttachWebVRDisplay().then(() => {
        VRSimulationDriver.SetEyeResolution(eyeWidth, eyeHeight);
        VRSimulationDriver.UpdateVRDisplay();
      }).then(() => {
        // Looking for VR displays
        if (navigator.getVRDisplays) {
          submitResult = new VRSubmitFrameResult();
          navigator.getVRDisplays().then(function (displays) {
            if (displays.length > 0) {
              window.addEventListener('vrdisplaypresentchange', onVRPresentChange, false);

              vrDisplay = displays[0];
              vrDisplay.requestPresent([{ source: webglCanvas }]);
              vrDisplay.requestAnimationFrame(onAnimationFrame);
            }
          });
        }
      });
    }

    function onVRPresentChange() {
      if (vrDisplay && vrDisplay.isPresenting) {
        const leftEye = vrDisplay.getEyeParameters("left");
        const rightEye = vrDisplay.getEyeParameters("right");

        if (leftEye.renderWidth != rightEye.renderWidth ||
            leftEye.renderWidth != eyeWidth) {
          setStatus('renderWidth is not equal to eyeWidth.');
        }

        if (leftEye.renderHeight != rightEye.renderHeight ||
            leftEye.renderHeight != eyeHeight) {
          setStatus('renderHeight is not equal to eyeHeight.');
        }
        webglCanvas.width = leftEye.renderWidth * 2;
        webglCanvas.height = leftEye.renderHeight;
      }
    }

    function onAnimationFrame() {
      if (!vrDisplay.isPresenting) {
        return;
      }

      gl.clearColor(0.0, 1.0, 0.0, 1.0);
      gl.clear(gl.COLOR_BUFFER_BIT);

      // Presenting render a stereo view.
      gl.viewport(0, 0, webglCanvas.width * 0.5, webglCanvas.height);
      gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);

      gl.viewport(webglCanvas.width * 0.5, 0, webglCanvas.width * 0.5, webglCanvas.height);
      gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);

      // Indicate VRDisplay we're done rendering.
      vrDisplay.submitFrame();
      if (vrDisplay.getSubmitFrameResult(submitResult)) {
        if (!img) {
          img = document.createElement("img");
          img.onload = function(){
            // img width will not be eyeWidth * 2 (540), it would
            // be 544. It is because D3D11 CopyResource changes
            // the destination image size.
            if ((img.height == eyeHeight)) {
              webglCanvas.style.display = 'none';
              vrDisplay.exitPresent();
              setTimeout(testComplete, 0);
            }
          };
          img.src = submitResult.base64Image;
          document.body.appendChild(img);
        } else {
          img.src = submitResult.base64Image;
        }
      }
      vrDisplay.requestAnimationFrame(onAnimationFrame);
    }

    function runTest() {
      webglCanvas = document.getElementById('canvas');
      gl = webglCanvas.getContext('webgl');
      if (!gl) {
        setStatus('WebGL context creation failed.');
        return;
      }
      gl.disable(gl.DEPTH_TEST);
      prog = WebGLUtil.createProgramByIds(gl, 'vs', 'fs');
      if (!prog) {
        setStatus('Program linking failed.');
        return;
      }
      prog.aVertCoord = gl.getAttribLocation(prog, "aVertCoord");

      var vertCoordArr = new Float32Array([
        -0.5, -0.5,
        0.5, -0.5,
        -0.5, 0.5,
        0.5, 0.5,
      ]);
      var vertCoordBuff = gl.createBuffer();
      gl.bindBuffer(gl.ARRAY_BUFFER, vertCoordBuff);
      gl.bufferData(gl.ARRAY_BUFFER, vertCoordArr, gl.STATIC_DRAW);
      gl.useProgram(prog);
      gl.enableVertexAttribArray(prog.aVertCoord);
      gl.vertexAttribPointer(prog.aVertCoord, 2, gl.FLOAT, false, 0, 0);

      initVRMock();
    }

    function testComplete() {
      document.documentElement.removeAttribute("class");
    }
  </script>
</head>

<body onload='runTest();'>
  <canvas id='canvas' width='128' height='128'></canvas>
  <div id='status'></div>
</body>

</html>

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