gtk/gdk/win32/gdkscreen-win32.c
Руслан Ижбулатов a235dd6a6c GDK W32: add environment variable to override system font scaling
Support environment variable GDK_WIN32_FONT_RESOLUTION that can be set to
a desired dpi (72, 96, 130, etc) to override system settings. Useful for
debugging, since changing system font scaling requires the user to log off
and log on again.

https://bugzilla.gnome.org/show_bug.cgi?id=734038
2014-07-31 14:27:14 +00:00

253 lines
7.2 KiB
C

/* GDK - The GIMP Drawing Kit
* Copyright (C) 2002 Hans Breuer
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gdk.h"
#include "gdkprivate-win32.h"
#include "gdkscreenprivate.h"
#include "gdkwin32screen.h"
struct _GdkWin32Screen
{
GdkScreen parent_instance;
};
struct _GdkWin32ScreenClass
{
GdkScreenClass parent_class;
};
G_DEFINE_TYPE (GdkWin32Screen, gdk_win32_screen, GDK_TYPE_SCREEN)
static void
gdk_win32_screen_init (GdkWin32Screen *display)
{
GdkScreen *screen = GDK_SCREEN (display);
HDC screen_dc;
int logpixelsx = -1;
const gchar *font_resolution;
screen_dc = GetDC (NULL);
if (screen_dc)
{
logpixelsx = GetDeviceCaps(screen_dc, LOGPIXELSX);
ReleaseDC (NULL, screen_dc);
}
font_resolution = g_getenv ("GDK_WIN32_FONT_RESOLUTION");
if (font_resolution)
{
int env_logpixelsx = atol (font_resolution);
if (env_logpixelsx > 0)
logpixelsx = env_logpixelsx;
}
if (logpixelsx > 0)
_gdk_screen_set_resolution (screen, logpixelsx);
}
static GdkDisplay *
gdk_win32_screen_get_display (GdkScreen *screen)
{
return _gdk_display;
}
static gint
gdk_win32_screen_get_width (GdkScreen *screen)
{
return GDK_WINDOW (_gdk_root)->width;
}
static gint
gdk_win32_screen_get_height (GdkScreen *screen)
{
return GDK_WINDOW (_gdk_root)->height;
}
static gint
gdk_win32_screen_get_width_mm (GdkScreen *screen)
{
return (double) gdk_screen_get_width (screen) / GetDeviceCaps (_gdk_display_hdc, LOGPIXELSX) * 25.4;
}
static gint
gdk_win32_screen_get_height_mm (GdkScreen *screen)
{
return (double) gdk_screen_get_height (screen) / GetDeviceCaps (_gdk_display_hdc, LOGPIXELSY) * 25.4;
}
static GdkWindow *
gdk_win32_screen_get_root_window (GdkScreen *screen)
{
return _gdk_root;
}
static gint
gdk_win32_screen_get_n_monitors (GdkScreen *screen)
{
g_return_val_if_fail (screen == _gdk_screen, 0);
return _gdk_num_monitors;
}
static gint
gdk_win32_screen_get_primary_monitor (GdkScreen *screen)
{
g_return_val_if_fail (screen == _gdk_screen, 0);
return 0;
}
static gint
gdk_win32_screen_get_monitor_width_mm (GdkScreen *screen,
gint num_monitor)
{
g_return_val_if_fail (screen == _gdk_screen, 0);
g_return_val_if_fail (num_monitor < _gdk_num_monitors, 0);
return _gdk_monitors[num_monitor].width_mm;
}
static gint
gdk_win32_screen_get_monitor_height_mm (GdkScreen *screen,
gint num_monitor)
{
g_return_val_if_fail (screen == _gdk_screen, 0);
g_return_val_if_fail (num_monitor < _gdk_num_monitors, 0);
return _gdk_monitors[num_monitor].height_mm;
}
static gchar *
gdk_win32_screen_get_monitor_plug_name (GdkScreen *screen,
gint num_monitor)
{
g_return_val_if_fail (screen == _gdk_screen, 0);
g_return_val_if_fail (num_monitor < _gdk_num_monitors, 0);
return g_strdup (_gdk_monitors[num_monitor].name);
}
static void
gdk_win32_screen_get_monitor_geometry (GdkScreen *screen,
gint num_monitor,
GdkRectangle *dest)
{
g_return_if_fail (screen == _gdk_screen);
g_return_if_fail (num_monitor < _gdk_num_monitors);
*dest = _gdk_monitors[num_monitor].rect;
}
static GdkVisual *
gdk_win32_screen_get_rgba_visual (GdkScreen *screen)
{
g_return_val_if_fail (screen == _gdk_screen, NULL);
return NULL;
}
static gint
gdk_win32_screen_get_number (GdkScreen *screen)
{
g_return_val_if_fail (screen == _gdk_screen, 0);
return 0;
}
static gchar *
gdk_win32_screen_make_display_name (GdkScreen *screen)
{
return g_strdup (gdk_display_get_name (_gdk_display));
}
static GdkWindow *
gdk_win32_screen_get_active_window (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return NULL;
}
static GList *
gdk_win32_screen_get_window_stack (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
return NULL;
}
static gboolean
gdk_win32_screen_is_composited (GdkScreen *screen)
{
g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
return FALSE;
}
static void
gdk_win32_screen_finalize (GObject *object)
{
}
static void
gdk_win32_screen_dispose (GObject *object)
{
}
static void
gdk_win32_screen_class_init (GdkWin32ScreenClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkScreenClass *screen_class = GDK_SCREEN_CLASS (klass);
object_class->dispose = gdk_win32_screen_dispose;
object_class->finalize = gdk_win32_screen_finalize;
screen_class->get_display = gdk_win32_screen_get_display;
screen_class->get_width = gdk_win32_screen_get_width;
screen_class->get_height = gdk_win32_screen_get_height;
screen_class->get_width_mm = gdk_win32_screen_get_width_mm;
screen_class->get_height_mm = gdk_win32_screen_get_height_mm;
screen_class->get_number = gdk_win32_screen_get_number;
screen_class->get_root_window = gdk_win32_screen_get_root_window;
screen_class->get_n_monitors = gdk_win32_screen_get_n_monitors;
screen_class->get_primary_monitor = gdk_win32_screen_get_primary_monitor;
screen_class->get_monitor_width_mm = gdk_win32_screen_get_monitor_width_mm;
screen_class->get_monitor_height_mm = gdk_win32_screen_get_monitor_height_mm;
screen_class->get_monitor_plug_name = gdk_win32_screen_get_monitor_plug_name;
screen_class->get_monitor_geometry = gdk_win32_screen_get_monitor_geometry;
screen_class->get_monitor_workarea = gdk_win32_screen_get_monitor_geometry;
screen_class->get_system_visual = _gdk_win32_screen_get_system_visual;
screen_class->get_rgba_visual = gdk_win32_screen_get_rgba_visual;
screen_class->is_composited = gdk_win32_screen_is_composited;
screen_class->make_display_name = gdk_win32_screen_make_display_name;
screen_class->get_active_window = gdk_win32_screen_get_active_window;
screen_class->get_window_stack = gdk_win32_screen_get_window_stack;
screen_class->get_setting = _gdk_win32_screen_get_setting;
screen_class->visual_get_best_depth = _gdk_win32_screen_visual_get_best_depth;
screen_class->visual_get_best_type = _gdk_win32_screen_visual_get_best_type;
screen_class->visual_get_best = _gdk_win32_screen_visual_get_best;
screen_class->visual_get_best_with_depth = _gdk_win32_screen_visual_get_best_with_depth;
screen_class->visual_get_best_with_type = _gdk_win32_screen_visual_get_best_with_type;
screen_class->visual_get_best_with_both = _gdk_win32_screen_visual_get_best_with_both;
screen_class->query_depths = _gdk_win32_screen_query_depths;
screen_class->query_visual_types = _gdk_win32_screen_query_visual_types;
screen_class->list_visuals = _gdk_win32_screen_list_visuals;
}