drawingBufferToneMapping.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /webgl/drawingBufferToneMapping.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>WebGL drawingBufferToneMapping</title>

<link rel=help href=https://github.com/w3c-cg/ColorWeb-CG/blob/main/webgl-drawing-buffer-tone-map.md>

<script src=/resources/testharness.js></script>

<script src=/resources/testharnessreport.js></script>

<div id=log></div>

<script>

'use strict';

for (const contextType of ['webgl', 'webgl2']) {

  function createContext() {

    const canvas = document.createElement('canvas');

    return canvas.getContext(contextType);

  test(() => {

    const gl = createContext();

    assert_true(!!gl, 'Context creation should succeed');

    assert_equals(typeof gl.drawingBufferToneMapping, 'function',

        'drawingBufferToneMapping must be a function');

    assert_equals(gl.getError(), gl.NO_ERROR);

  }, `${contextType}: interface presence`);

  test(() => {

    const gl = createContext();

    const defaultToneMapping = gl.drawingBufferToneMapping();

    assert_equals(defaultToneMapping.mode, 'standard');

    assert_equals(gl.getError(), gl.NO_ERROR);

    // Verify a fresh dictionary copy is returned.

    const secondCall = gl.drawingBufferToneMapping();

    assert_not_equals(defaultToneMapping, secondCall);

    assert_equals(secondCall.mode, 'standard');

  }, `${contextType}: default value is standard`);

  test(() => {

    const gl = createContext();

    // gl.drawingBufferToneMapping(undefined) acts as getter.

    assert_equals(gl.drawingBufferToneMapping(undefined).mode, 'standard');

    // Setter with mode: 'extended'.

    assert_equals(gl.drawingBufferToneMapping({mode: 'extended'}).mode, 'extended');

    assert_equals(gl.drawingBufferToneMapping().mode, 'extended');

    assert_equals(gl.drawingBufferToneMapping(undefined).mode, 'extended');

    // Setter with mode: 'standard'.

    assert_equals(gl.drawingBufferToneMapping({mode: 'standard'}).mode, 'standard');

    assert_equals(gl.drawingBufferToneMapping().mode, 'standard');

    // Setter with empty dictionary defaults mode to 'standard'.

    gl.drawingBufferToneMapping({mode: 'extended'});

    assert_equals(gl.drawingBufferToneMapping({}).mode, 'standard');

    assert_equals(gl.drawingBufferToneMapping().mode, 'standard');

    assert_equals(gl.getError(), gl.NO_ERROR);

  }, `${contextType}: setting and getting modes`);

  test(() => {

    const gl = createContext();

    assert_throws_js(TypeError, () => {

      gl.drawingBufferToneMapping({mode: 'invalid'});

    }, 'Invalid mode string should throw TypeError');

    assert_throws_js(TypeError, () => {

      gl.drawingBufferToneMapping({mode: null});

    }, 'Null mode should throw TypeError');

    // Verify that throwing did not alter the existing tone mapping.

    assert_equals(gl.drawingBufferToneMapping().mode, 'standard');

    assert_equals(gl.getError(), gl.NO_ERROR);

  }, `${contextType}: invalid mode throws TypeError`);

</script>