Mercurial > octave
view libinterp/corefcn/cdisplay.c @ 30564:796f54d4ddbf stable
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2021.
In all .txi and .texi files except gpl.txi and gpl.texi in the
doc/liboctave and doc/interpreter directories, change the copyright
to "Octave Project Developers", the same as used for other source
files. Update copyright notices for 2022 (not done since 2019). For
gpl.txi and gpl.texi, change the copyright notice to be "Free Software
Foundation, Inc." and leave the date at 2007 only because this file
only contains the text of the GPL, not anything created by the Octave
Project Developers.
Add Paul Thomas to contributors.in.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 28 Dec 2021 18:22:40 -0500 |
parents | 0a5b15007766 |
children | 597f3ee61a48 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 2009-2022 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // This file is part of Octave. // // Octave 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. // // Octave 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 Octave; see the file COPYING. If not, see // <https://www.gnu.org/licenses/>. // //////////////////////////////////////////////////////////////////////// #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <stdlib.h> #if defined (OCTAVE_USE_WINDOWS_API) #include <windows.h> #elif defined (HAVE_FRAMEWORK_CARBON) #include <Carbon/Carbon.h> #elif defined (HAVE_X_WINDOWS) #include <X11/Xlib.h> #endif #include "cdisplay.h" // Programming Note: This file exists so that we can hide system // header files that make heavy use of macros and C-style casts in a C // language file and avoid warnings about using old-style casts in C++. // Additionally, on OS X systems, including the Carbon.h header file // results in the declaration of a "panic" function that conflicts with // Octave's global panic function, so Carbon.h can't be included in any // file that also includes Octave's error.h header file. // Please do NOT eliminate this file and move code from here to // display.cc. const char * octave_get_display_info (const char *dpy_name, int *ht, int *wd, int *dp, double *rx, double *ry, int *dpy_avail) { const char *msg = NULL; *dpy_avail = 0; double ht_mm = 0.0; double wd_mm = 0.0; #if defined (OCTAVE_USE_WINDOWS_API) octave_unused_parameter (dpy_name); HDC hdc = GetDC (0); if (hdc) { *dp = GetDeviceCaps (hdc, BITSPIXEL); *ht = GetDeviceCaps (hdc, VERTRES); *wd = GetDeviceCaps (hdc, HORZRES); ht_mm = GetDeviceCaps (hdc, VERTSIZE); wd_mm = GetDeviceCaps (hdc, HORZSIZE); *dpy_avail = 1; } else msg = "no graphical display found"; #elif defined (HAVE_FRAMEWORK_CARBON) octave_unused_parameter (dpy_name); CGDirectDisplayID display = CGMainDisplayID (); if (display) { #if defined (HAVE_CARBON_CGDISPLAYBITSPERPIXEL) *dp = CGDisplayBitsPerPixel (display); #else /* FIXME: This will only work for MacOS > 10.5. For earlier versions this code is not needed (use CGDisplayBitsPerPixel instead). */ CGDisplayModeRef mode = CGDisplayCopyDisplayMode (display); CFStringRef pixelEncoding = CGDisplayModeCopyPixelEncoding (mode); if (CFStringCompare (pixelEncoding, CFSTR (IO32BitDirectPixels), 0) == 0) *dp = 32; else if (CFStringCompare (pixelEncoding, CFSTR (IO16BitDirectPixels), 0) == 0) *dp = 16; else *dp = 8; #endif *ht = CGDisplayPixelsHigh (display); *wd = CGDisplayPixelsWide (display); CGSize sz_mm = CGDisplayScreenSize (display); /* For MacOS >= 10.6, CGSize is a struct keeping 2 CGFloat values, but the CGFloat typedef is not present on older systems, so use double instead. */ ht_mm = sz_mm.height; wd_mm = sz_mm.width; *dpy_avail = 1; } else msg = "no graphical display found"; #elif defined (HAVE_X_WINDOWS) /* If dpy_name is NULL, XopenDisplay will look for DISPLAY in the environment. */ Display *display = XOpenDisplay (dpy_name); if (display) { Screen *screen = DefaultScreenOfDisplay (display); if (screen) { *dp = DefaultDepthOfScreen (screen); *ht = HeightOfScreen (screen); *wd = WidthOfScreen (screen); int screen_number = XScreenNumberOfScreen (screen); ht_mm = DisplayHeightMM (display, screen_number); wd_mm = DisplayWidthMM (display, screen_number); *dpy_avail = 1; } else msg = "X11 display has no default screen"; XCloseDisplay (display); } else msg = "unable to open X11 DISPLAY"; #else octave_unused_parameter (dpy_name); octave_unused_parameter (ht); octave_unused_parameter (wd); octave_unused_parameter (dp); octave_unused_parameter (rx); octave_unused_parameter (ry); msg = "no graphical display found"; #endif if (*dpy_avail) { if (wd_mm == 0 || ht_mm == 0) { msg = "screen width or height reported to be zero"; // Sizes reported as zero have been found on some systems. // For example, X/Wayland running inside virtualbox. // Guess a DPI. *rx = 96.0; *ry = 96.0; } else { *rx = *wd * 25.4 / wd_mm; *ry = *ht * 25.4 / ht_mm; } } return msg; }