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An multi-platform library for OpenGL, OpenGL ES and Vulkan development on the desktop. It provides a simple API for creating windows, contexts and surfaces, receiving input and events.

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/*
 * Copyright LWJGL. All rights reserved.
 * License terms: https://www.lwjgl.org/license
 * MACHINE GENERATED FILE, DO NOT EDIT
 */
package org.lwjgl.glfw;

import org.lwjgl.system.*;
import org.lwjgl.system.libffi.*;

import static org.lwjgl.system.APIUtil.*;
import static org.lwjgl.system.MemoryUtil.*;
import static org.lwjgl.system.libffi.LibFFI.*;

/**
 * Instances of this interface may be passed to the {@link GLFW#glfwSetScrollCallback SetScrollCallback} method.
 * 
 * Type
 * 
 * 
 * void (*{@link #invoke}) (
 *     GLFWwindow *window,
 *     double xoffset,
 *     double yoffset
 * )
 *
 * @since version 3.0
 */
@FunctionalInterface
@NativeType("GLFWscrollfun")
public interface GLFWScrollCallbackI extends CallbackI {

    FFICIF CIF = apiCreateCIF(
        FFI_DEFAULT_ABI,
        ffi_type_void,
        ffi_type_pointer, ffi_type_double, ffi_type_double
    );

    @Override
    default FFICIF getCallInterface() { return CIF; }

    @Override
    default void callback(long ret, long args) {
        invoke(
            memGetAddress(memGetAddress(args)),
            memGetDouble(memGetAddress(args + POINTER_SIZE)),
            memGetDouble(memGetAddress(args + 2 * POINTER_SIZE))
        );
    }

    /**
     * Will be called when a scrolling device is used, such as a mouse wheel or scrolling area of a touchpad.
     *
     * @param window  the window that received the event
     * @param xoffset the scroll offset along the x-axis
     * @param yoffset the scroll offset along the y-axis
     */
    void invoke(@NativeType("GLFWwindow *") long window, double xoffset, double yoffset);

}