glDeleteSamplers

`glDeleteSamplers` is an OpenGL function used to delete one or more sampler objects that were previously created using `glCreateSamplers`. Sampler objects in OpenGL define how texture coordinates are interpreted when sampling textures, including parameters like filtering methods, wrapping modes, and anisotropy settings. Deleting samplers frees up associated system resources, which can be important for managing memory and preventing leaks, especially in applications with dynamic texture handling.

The function is declared in the OpenGL core profile and compatibility profile contexts, as well as in the OpenGL ES 3.0 and later specifications. It is part of the OpenGL 4.3 core specification and later versions. The function does not require any context to be current, as it operates purely on the sampler object identifiers passed to it.

The prototype for `glDeleteSamplers` in C is as follows:

```c

void glDeleteSamplers(GLsizei count, const GLuint *samplers);

```

The function takes two parameters:

- `count`: The number of sampler objects to delete, specified as a non-negative integer.

- `samplers`: A pointer to an array of `GLuint` values representing the sampler object names to be deleted. The array must contain exactly `count` elements.

If `count` is zero, the function does nothing. If any sampler object in the `samplers` array has already been deleted, it is ignored without generating an error. Attempting to delete a sampler object that does not exist (e.g., a zero or negative value) generates an `INVALID_VALUE` error. Additionally, attempting to delete a sampler object that is currently in use (e.g., bound to a shader or texture unit) may result in undefined behavior or an error, depending on the implementation.

After deletion, any references to the sampler object in shaders or other OpenGL operations become invalid, and using the deleted sampler object name will generate an `INVALID_OPERATION` error. It is the programmer's responsibility to ensure that all references to deleted samplers are removed before attempting to reuse their object names.