emscripten-core/emscripten

Behavioral difference in glUniform functions

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#16,367 opened on Feb 23, 2022

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GLdocsgood first bughelp wanted

Description

Version of emscripten/emsdk: 2.0.32

glUniform functions in OpenGL ES take a regular GLuint. A literal value can be passed. Emscripten will pass undefined if glGetUniformLocation was not used. Emscripten's behavior is not wrong IMO, but it would be good to mention this somewhere as a behavioral difference.

Contributor guide

Tech stack
cppwasm
Domain
documentation
Issue type
documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Emscripten basicsOpenGL ES
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
85
Research direction
Look into the Emscripten documentation for OpenGL ES support, likely in the 'opengl' section. Identify where glUniform functions are documented and add a note about passing undefined when glGetUniformLocation is not used. Confirm the expected behavior with maintainers if needed.