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throw error if MAX_TEXTURE_IMAGE_UNITS is a bad value

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Tom 2024-01-19 13:19:43 -05:00
parent f6c35b44ed
commit 3cdd5fd711
1 changed files with 7 additions and 1 deletions
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8
src/webgldrawer.js
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@ -276,9 +276,15 @@
let maxTextures = this._gl.getParameter(this._gl.MAX_TEXTURE_IMAGE_UNITS); let maxTextures = this._gl.getParameter(this._gl.MAX_TEXTURE_IMAGE_UNITS);
if(maxTextures <= 0){ if(maxTextures <= 0){
// This can apparently happen on some systems if too many WebGL contexts have been created // This can apparently happen on some systems if too many WebGL contexts have been created
// in which case maxTextures can be null, leading to out of bounds errors with the array // in which case maxTextures can be null, leading to out of bounds errors with the array.
// For example, when viewers were created and not destroyed in the test suite, this error
// occured in the TravisCI tests, though it did not happen when testing locally either in
// a browser or on the command line via grunt test.
// use plain console.error instead of $.console.error in order to have the message show up in the test log. // use plain console.error instead of $.console.error in order to have the message show up in the test log.
console.error(`There was a WebGL problem: bad value for MAX_TEXTURE_IMAGE_UNITS (${maxTextures})`); console.error(`There was a WebGL problem: bad value for MAX_TEXTURE_IMAGE_UNITS (${maxTextures})`);
throw(new Error(`WegGL error: bad value for gl parameter MAX_TEXTURE_IMAGE_UNITS (${maxTextures}). This could happen
if too many contexts have been created and not released, or there is another problem with the graphics card.`));
return; return;
} }