### Method

# Gsk GLShader compile

deprecated: 4.16

#### Declaration [src]

    gboolean
    gsk_gl_shader_compile (
      GskGLShader* shader,
      GskRenderer* renderer,
      GError** error
    )

#### Description [src]

Tries to compile the `shader` for the given `renderer`.

If there is a problem, this function returns `FALSE` and reports an error. You should use this function before relying on the shader for rendering and use a fallback with a simpler shader or without shaders if it fails.

Note that this will modify the rendering state (for example change the current GL context) and requires the renderer to be set up. This means that the widget has to be realized. Commonly you want to call this from the realize signal of a widget, or during widget snapshot.

Deprecated since: 4.16

GTK’s new Vulkan-focused rendering does not support this feature. Use GtkGLArea for OpenGL rendering.

#### Parameters

`renderer`

  Type: `GskRenderer`

  A `GskRenderer`.

  The data is owned by the caller of the method.

`error`

  Type: `GError **`

  The return location for a recoverable error.

  The argument can be `NULL`.
  If the return location is not `NULL`, then you must initialize it to a `NULL` `GError*`.
  The argument will be left initialized to `NULL` by the method if there are no errors.
  In case of error, the argument will be set to a newly allocated `GError`; the caller will take ownership of the data, and be responsible for freeing it.

#### Return value

Type: `gboolean`

`TRUE` on success, `FALSE` if an error occurred.