/** * jlibgamma — Display server abstraction layer for gamma ramp and Java * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) * * This library is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this library. If not, see . */ package libgamma; /** * Class of adjustment methods. */ public enum AdjustmentMethod { /** * The identifier for the dummy adjustment method. * This method can be configured and is useful for * testing your program's ability to handle errors. */ DUMMY(0), /** * The identifier for the adjustment method with * uses the RandR protocol under the X display server. */ X_RANDR(1), /** * The identifier for the adjustment method with * uses the VidMode protocol under the X display server. * This is an older alternative to RandR that can * work on some drivers that are not supported by RandR, * however it can only control the primary CRTC per * screen (partition). */ X_VIDMODE(2), /** * The identifier for the Direct Rendering Manager * adjustment method that is available in Linux * (built in to the Linux kernel with a userland * library for access) and is a part of the * Direct Rendering Infrastructure. This adjustment * method all work when you are in non-graphical * mode; however a display server cannnot be * started while this is running, but it can be * started while a display server is running. */ LINUX_DRM(3), /** * The identifier for the Graphics Device Interface * adjustment method that is available in Windows. * This method is not well tested; it can be compiled * to be available under X.org using a translation layer. */ W32_GDI(4), /** * The identifier for the CoreGraphics adjustment * method that is available in Mac OS X that can * adjust gamma ramps under the Quartz display server. * This method is not well tested; it can be compiled * to be available under X.org using a translation layer. */ QUARTZ_CORE_GRAPHICS(5) ; /** * The index of the last gamma method, neither it * nor any index before it may actually be supported * as it could have been disabled at compile-time */ public static final int MAX = 5; /** * The number adjustment methods provided by this library. * Note however that this includes adjstment methods that * have been removed at compile-time. */ public static final int COUNT = MAX + 1; /** * Adjustment methods by their numerical values. */ public static AdjustmentMethod[] VALUES = { DUMMY, X_RANDR, X_VIDMODE, LINUX_DRM, W32_GDI, QUARTZ_CORE_GRAPHICS }; /** * Constructor. * * @param value The numerical value of the adjustment method. */ private AdjustmentMethod(int value) { this.value = value; } /** * The numerical value of the adjustment method. */ public final int value; /** * Check whether the adjustment method is available. * * @return Whether the adjustment method is available. */ public boolean is_available() { return libgamma_is_method_available(this.value) != 0; } /** * Get the default site for the adjustment method. * * @return The default site for the adjustment method. */ public String default_site() { return libgamma_method_default_site(this.value); } /** * Get the default variable that determines the default * site for the adjustment method. * * @return default variable that determines the default * site for the adjustment method. */ public String default_site_variable() { return libgamma_method_default_site_variable(this.value); } /** * List available adjustment methods by their order of preference based on the environment. * * @param operation Allowed values: * 0: Methods that the environment suggests will work, excluding fake. * 1: Methods that the environment suggests will work, including fake. * 2: All real non-fake methods. * 3: All real methods. * 4: All methods. * Other values invoke undefined behaviour. * @return List available adjustment methods by their order of preference. */ public static AdjustmentMethod[] list_methods(int operation) { int[] methods = libgamma_list_methods(operation); AdjustmentMethod[] rc = new AdjustmentMethod[methods.length]; for (int i = 0; i < methods.length; i++) rc[i] = VALUES[methods[i]]; return rc; } /** * List available adjustment methods by their order of preference based on the environment. * * @param operation Allowed values: * 0: Methods that the environment suggests will work, excluding fake. * 1: Methods that the environment suggests will work, including fake. * 2: All real non-fake methods. * 3: All real methods. * 4: All methods. * Other values invoke undefined behaviour. * @return List available adjustment methods by their order of preference. */ private static native int[] libgamma_list_methods(int operation); /** * Check whether an adjustment method is available, non-existing (invalid) methods will be * identified as not available under the rationale that the library may be out of date. * * @param method The adjustment method. * @return Whether the adjustment method is available. */ private static native int libgamma_is_method_available(int method); /** * Return the default site for an adjustment method. * * @param method The adjustment method (display server and protocol.) * @return The default site, {@code null} if it cannot be determined or * if multiple sites are not supported by the adjustment method. */ private static native String libgamma_method_default_site(int method); /** * Return the default variable that determines * the default site for an adjustment method. * * @param method The adjustment method (display server and protocol.) * @return The environ variables that is used to determine the * default site. {@code null} if there is none, that is, * if the method does not support multiple sites. */ private static native String libgamma_method_default_site_variable(int method); }