419 lines
12 KiB
C
419 lines
12 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "version/gdkversionmacros.h"
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#include "gdkresources.h"
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#include "gdkconstructorprivate.h"
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#include "gdkdebugprivate.h"
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#include "gdkdisplayprivate.h"
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#include "gdkglcontextprivate.h"
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#include <glib/gi18n-lib.h>
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#include "gdkprivate.h"
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#include <glib/gprintf.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <fribidi.h>
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/**
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* GDK_WINDOWING_X11:
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*
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* The `GDK_WINDOWING_X11` macro is defined if the X11 backend
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* is supported.
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*
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* Use this macro to guard code that is specific to the X11 backend.
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*/
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/**
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* GDK_WINDOWING_WIN32:
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*
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* The `GDK_WINDOWING_WIN32` macro is defined if the Win32 backend
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* is supported.
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*
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* Use this macro to guard code that is specific to the Win32 backend.
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*/
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/**
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* GDK_WINDOWING_MACOS:
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*
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* The `GDK_WINDOWING_MACOS` macro is defined if the MacOS backend
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* is supported.
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*
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* Use this macro to guard code that is specific to the MacOS backend.
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*/
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/**
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* GDK_WINDOWING_WAYLAND:
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*
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* The `GDK_WINDOWING_WAYLAND` macro is defined if the Wayland backend
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* is supported.
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*
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* Use this macro to guard code that is specific to the Wayland backend.
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*/
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/**
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* GDK_DISABLE_DEPRECATION_WARNINGS:
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*
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* A macro that should be defined before including the gdk.h header.
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*
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* If it is defined, no compiler warnings will be produced for uses
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* of deprecated GDK APIs.
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*/
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typedef struct _GdkThreadsDispatch GdkThreadsDispatch;
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struct _GdkThreadsDispatch
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{
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GSourceFunc func;
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gpointer data;
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GDestroyNotify destroy;
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};
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/* Private variable declarations
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*/
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static int gdk_initialized = 0; /* 1 if the library is initialized,
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* 0 otherwise.
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*/
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static const GdkDebugKey gdk_debug_keys[] = {
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{ "misc", GDK_DEBUG_MISC, "Miscellaneous information" },
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{ "events", GDK_DEBUG_EVENTS, "Information about events" },
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{ "dnd", GDK_DEBUG_DND, "Information about Drag-and-Drop" },
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{ "input", GDK_DEBUG_INPUT, "Information about input (Windows)" },
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{ "eventloop", GDK_DEBUG_EVENTLOOP, "Information about event loop operation (Quartz)" },
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{ "frames", GDK_DEBUG_FRAMES, "Information about the frame clock" },
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{ "settings", GDK_DEBUG_SETTINGS, "Information about xsettings" },
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{ "opengl", GDK_DEBUG_OPENGL, "Information about OpenGL" },
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{ "vulkan", GDK_DEBUG_VULKAN, "Information about Vulkan" },
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{ "selection", GDK_DEBUG_SELECTION, "Information about selections" },
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{ "clipboard", GDK_DEBUG_CLIPBOARD, "Information about clipboards" },
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{ "dmabuf", GDK_DEBUG_DMABUF, "Information about dmabuf buffers" },
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{ "offload", GDK_DEBUG_OFFLOAD, "Information about subsurfaces and graphics offload" },
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{ "portals", GDK_DEBUG_PORTALS, "Force use of portals" },
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{ "no-portals", GDK_DEBUG_NO_PORTALS, "Disable use of portals" },
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{ "gl-disable", GDK_DEBUG_GL_DISABLE, "Disable OpenGL support" },
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{ "gl-fractional", GDK_DEBUG_GL_FRACTIONAL, "Enable fractional scaling for OpenGL (experimental)" },
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{ "gl-debug", GDK_DEBUG_GL_DEBUG, "Insert debugging information in OpenGL" },
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{ "gl-disable-gl", GDK_DEBUG_GL_DISABLE_GL, "Only allow OpenGL GLES API" },
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{ "gl-disable-gles", GDK_DEBUG_GL_DISABLE_GLES, "Don't allow OpenGL GLES API" },
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{ "gl-prefer-gl", GDK_DEBUG_GL_PREFER_GL, "Prefer GL over GLES API" },
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{ "gl-egl", GDK_DEBUG_GL_EGL, "Use EGL on X11 or Windows" },
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{ "gl-glx", GDK_DEBUG_GL_GLX, "Use GLX on X11" },
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{ "gl-wgl", GDK_DEBUG_GL_WGL, "Use WGL on Windows" },
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{ "vulkan-disable", GDK_DEBUG_VULKAN_DISABLE, "Disable Vulkan support" },
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{ "vulkan-validate", GDK_DEBUG_VULKAN_VALIDATE, "Load the Vulkan validation layer" },
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{ "default-settings",GDK_DEBUG_DEFAULT_SETTINGS, "Force default values for xsettings" },
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{ "high-depth", GDK_DEBUG_HIGH_DEPTH, "Use high bit depth rendering if possible" },
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{ "no-vsync", GDK_DEBUG_NO_VSYNC, "Repaint instantly (uses 100% CPU with animations)" },
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{ "dmabuf-disable", GDK_DEBUG_DMABUF_DISABLE, "Disable dmabuf support" },
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};
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#ifdef G_HAS_CONSTRUCTORS
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#ifdef G_DEFINE_CONSTRUCTOR_NEEDS_PRAGMA
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#pragma G_DEFINE_CONSTRUCTOR_PRAGMA_ARGS(stash_desktop_startup_notification_id)
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#endif
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G_DEFINE_CONSTRUCTOR(stash_desktop_startup_notification_id)
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#endif
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static char *startup_notification_id = NULL;
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static void
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stash_desktop_startup_notification_id (void)
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{
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const char *desktop_startup_id;
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desktop_startup_id = g_getenv ("DESKTOP_STARTUP_ID");
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if (desktop_startup_id && *desktop_startup_id != '\0')
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{
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if (!g_utf8_validate (desktop_startup_id, -1, NULL))
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g_warning ("DESKTOP_STARTUP_ID contains invalid UTF-8");
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else
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startup_notification_id = g_strdup (desktop_startup_id);
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}
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/* Clear the environment variable so it won't be inherited by
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* child processes and confuse things.
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*/
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g_unsetenv ("DESKTOP_STARTUP_ID");
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}
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static gpointer
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register_resources (gpointer dummy G_GNUC_UNUSED)
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{
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_gdk_register_resource ();
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return NULL;
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}
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static void
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gdk_ensure_resources (void)
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{
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static GOnce register_resources_once = G_ONCE_INIT;
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g_once (®ister_resources_once, register_resources, NULL);
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}
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guint
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gdk_parse_debug_var (const char *variable,
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const GdkDebugKey *keys,
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guint nkeys)
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{
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guint i;
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guint result = 0;
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const char *string;
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const char *p;
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const char *q;
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gboolean invert;
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gboolean help;
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string = g_getenv (variable);
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if (string == NULL)
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return 0;
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p = string;
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invert = FALSE;
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help = FALSE;
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while (*p)
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{
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q = strpbrk (p, ":;, \t");
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if (!q)
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q = p + strlen (p);
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if (3 == q - p && g_ascii_strncasecmp ("all", p, q - p) == 0)
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{
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invert = TRUE;
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}
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else if (4 == q - p && g_ascii_strncasecmp ("help", p, q - p) == 0)
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{
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help = TRUE;
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}
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else
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{
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char *val = g_strndup (p, q - p);
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for (i = 0; i < nkeys; i++)
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{
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if (strlen (keys[i].key) == q - p &&
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g_ascii_strncasecmp (keys[i].key, p, q - p) == 0)
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{
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result |= keys[i].value;
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break;
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}
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}
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if (i == nkeys)
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fprintf (stderr, "Unrecognized value \"%s\". Try %s=help\n", val, variable);
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g_free (val);
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}
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p = q;
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if (*p)
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p++;
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}
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if (help)
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{
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int max_width = 4;
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for (i = 0; i < nkeys; i++)
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max_width = MAX (max_width, strlen (keys[i].key));
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max_width += 4;
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fprintf (stderr, "Supported %s values:\n", variable);
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for (i = 0; i < nkeys; i++) {
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fprintf (stderr, " %s%*s%s\n", keys[i].key, (int)(max_width - strlen (keys[i].key)), " ", keys[i].help);
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}
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fprintf (stderr, " %s%*s%s\n", "all", max_width - 3, " ", "Enable all values. Other given values are subtracted");
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fprintf (stderr, " %s%*s%s\n", "help", max_width - 4, " ", "Print this help");
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fprintf (stderr, "\nMultiple values can be given, separated by : or space.\n");
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}
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if (invert)
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{
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guint all_flags = 0;
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for (i = 0; i < nkeys; i++)
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{
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all_flags |= keys[i].value;
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}
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result = all_flags & (~result);
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}
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return result;
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}
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void
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gdk_pre_parse (void)
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{
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gdk_initialized = TRUE;
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gdk_ensure_resources ();
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_gdk_debug_flags = gdk_parse_debug_var ("GDK_DEBUG",
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gdk_debug_keys,
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G_N_ELEMENTS (gdk_debug_keys));
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/* These are global */
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if (_gdk_debug_flags & GDK_DEBUG_GL_EGL)
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gdk_gl_backend_use (GDK_GL_EGL);
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else if (_gdk_debug_flags & GDK_DEBUG_GL_GLX)
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gdk_gl_backend_use (GDK_GL_GLX);
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else if (_gdk_debug_flags & GDK_DEBUG_GL_WGL)
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gdk_gl_backend_use (GDK_GL_WGL);
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#ifndef G_HAS_CONSTRUCTORS
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stash_desktop_startup_notification_id ();
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#endif
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}
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/*< private >
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* gdk_display_open_default:
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*
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* Opens the default display specified by command line arguments or
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* environment variables, sets it as the default display, and returns
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* it. If the default display has previously been set, simply returns
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* that. An internal function that should not be used by applications.
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*
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* Returns: (nullable) (transfer none): the default display, if it
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* could be opened, otherwise %NULL.
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*/
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GdkDisplay *
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gdk_display_open_default (void)
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{
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GdkDisplay *display;
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g_return_val_if_fail (gdk_initialized, NULL);
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display = gdk_display_get_default ();
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if (display)
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return display;
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display = gdk_display_open (NULL);
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return display;
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}
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/*< private >
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* gdk_get_startup_notification_id:
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*
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* Returns the original value of the DESKTOP_STARTUP_ID environment
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* variable if it was defined and valid, or %NULL otherwise.
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*
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* Returns: (nullable) (transfer none): the original value of the
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* DESKTOP_STARTUP_ID environment variable
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*/
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const char *
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gdk_get_startup_notification_id (void)
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{
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return startup_notification_id;
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}
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gboolean
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gdk_running_in_sandbox (void)
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{
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return g_file_test ("/.flatpak-info", G_FILE_TEST_EXISTS);
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}
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gboolean
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gdk_should_use_portal (void)
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{
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if (gdk_display_get_debug_flags (NULL) & GDK_DEBUG_PORTALS)
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return TRUE;
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if (gdk_display_get_debug_flags (NULL) & GDK_DEBUG_NO_PORTALS)
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return FALSE;
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if (gdk_running_in_sandbox ())
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return TRUE;
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return FALSE;
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}
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PangoDirection
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gdk_unichar_direction (gunichar ch)
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{
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FriBidiCharType fribidi_ch_type;
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G_STATIC_ASSERT (sizeof (FriBidiChar) == sizeof (gunichar));
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fribidi_ch_type = fribidi_get_bidi_type (ch);
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if (!FRIBIDI_IS_STRONG (fribidi_ch_type))
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return PANGO_DIRECTION_NEUTRAL;
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else if (FRIBIDI_IS_RTL (fribidi_ch_type))
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return PANGO_DIRECTION_RTL;
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else
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return PANGO_DIRECTION_LTR;
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}
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PangoDirection
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gdk_find_base_dir (const char *text,
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int length)
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{
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PangoDirection dir = PANGO_DIRECTION_NEUTRAL;
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const char *p;
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g_return_val_if_fail (text != NULL || length == 0, PANGO_DIRECTION_NEUTRAL);
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p = text;
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while ((length < 0 || p < text + length) && *p)
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{
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gunichar wc = g_utf8_get_char (p);
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dir = gdk_unichar_direction (wc);
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if (dir != PANGO_DIRECTION_NEUTRAL)
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break;
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p = g_utf8_next_char (p);
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}
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return dir;
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}
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void
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gdk_source_set_static_name_by_id (guint tag,
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const char *name)
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{
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GSource *source;
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g_return_if_fail (tag > 0);
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source = g_main_context_find_source_by_id (NULL, tag);
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if (source == NULL)
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return;
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g_source_set_static_name (source, name);
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}
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