libgdx/libgdx · error · GdxRuntimeException

not implemented

Error message

not implemented

What it means

Error "not implemented" thrown in libgdx/libgdx.

Source

Thrown at backends/gdx-backend-lwjgl3/src/com/badlogic/gdx/backends/lwjgl3/Lwjgl3GL20.java:184

		GL11.glColorMask(red, green, blue, alpha);
	}

	public void glCompileShader (int shader) {
		GL20.glCompileShader(shader);
	}

	public void glCompressedTexImage2D (int target, int level, int internalformat, int width, int height, int border,
		int imageSize, Buffer data) {
		if (data instanceof ByteBuffer) {
			GL13.glCompressedTexImage2D(target, level, internalformat, width, height, border, (ByteBuffer)data);
		} else {
			throw new GdxRuntimeException("Can't use " + data.getClass().getName() + " with this method. Use ByteBuffer instead.");
		}
	}

	public void glCompressedTexSubImage2D (int target, int level, int xoffset, int yoffset, int width, int height, int format,
		int imageSize, Buffer data) {
		throw new GdxRuntimeException("not implemented");
	}

	public void glCopyTexImage2D (int target, int level, int internalformat, int x, int y, int width, int height, int border) {
		GL11.glCopyTexImage2D(target, level, internalformat, x, y, width, height, border);
	}

	public void glCopyTexSubImage2D (int target, int level, int xoffset, int yoffset, int x, int y, int width, int height) {
		GL11.glCopyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);
	}

	public int glCreateProgram () {
		return GL20.glCreateProgram();
	}

	public int glCreateShader (int type) {
		return GL20.glCreateShader(type);
	}

View on GitHub (pinned to 97f4086187)

Solutions

1. This GL entry point is not implemented in the lwjgl3 GL20 wrapper; use an alternative GL call that is implemented, or call the LWJGL GL11/GL20 function directly.

When it happens

Trigger: Thrown at backends/gdx-backend-lwjgl3/src/com/badlogic/gdx/backends/lwjgl3/Lwjgl3GL20.java:184 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of libgdx/libgdx@97f4086187 (2026-08-14). Data as JSON: /api/errors/2a387e7de5b3753d. Report an issue: GitHub.