dom/webgpu/mochitest/test_buffer_mapping_overlapping_views.html

   1 <!doctype html>
   2 <html>
   3   <head>
   4     <meta charset="utf-8" />
   5     <script src="/tests/SimpleTest/SimpleTest.js"></script>
   6     <link rel="stylesheet" href="/tests/SimpleTest/test.css" />
   7   </head>
   8   <body>
   9     <script>
  10       ok(
  11         SpecialPowers.getBoolPref("dom.webgpu.enabled"),
  12         "Pref should be enabled."
  13       );
  14
  15       async function testBody() {
  16         const adapter = await navigator.gpu.requestAdapter();
  17         const device = await adapter.requestDevice();
  18
  19         let buffer = device.createBuffer({
  20           size: 48,
  21           usage: GPUBufferUsage.MAP_READ,
  22           mappedAtCreation: true,
  23         });
  24         let view1 = buffer.getMappedRange(16, 24);
  25
  26         function bad_overlap(start, size, complaint) {
  27           SimpleTest.doesThrow(() => {
  28             buffer.getMappedRange(start, size);
  29           }, complaint);
  30         }
  31
  32         bad_overlap(8, 16, "overlap start of prior");
  33         bad_overlap(32, 16, "overlap end of prior");
  34         bad_overlap(8, 40, "enclose prior");
  35         bad_overlap(24, 8, "enclosed by prior");
  36
  37         // Not really an overlap, but this checks for a mistake in
  38         // an early revision of the patch that introduces this test.
  39         SimpleTest.doesThrow(() => {
  40           buffer.getMappedRange(64, 8);
  41         }, "offset beyond mapped range");
  42
  43         // should be fine
  44         ok(
  45           typeof buffer.getMappedRange(0, 16) == "object",
  46           "no overlap before"
  47         );
  48         ok(typeof buffer.getMappedRange(40, 8) == "object", "no overlap after");
  49       }
  50
  51       SimpleTest.waitForExplicitFinish();
  52       testBody()
  53         .catch(e => ok(false, "Unhandled exception " + e))
  54         .finally(() => SimpleTest.finish());
  55     </script>
  56   </body>
  57 </html>