Mercurial > octave
view libinterp/corefcn/cdisplay.c @ 21691:263d18409fdf
Eliminate unused variable warnings for conditionally compiled code.
We had more or less decided not to bother trying to eliminate all
these warnings for cases in which external dependencies are missing.
But then we get people trying to fix these in various ways, so we
might as well do it for all cases and use a consistent method.
* oct-conf-post.in.h (octave_unused_parameter): New function for C++
code and new macro for C code.
* mk-octave-config-h.sh: Emit octave_unused_parameter function and
macro for octave-config.h.
* CSparse.cc, __delaunayn__.cc, __eigs__.cc, __fltk_uigetfile__.cc,
__glpk__.cc, __magick_read__.cc, __osmesa_print__.cc, __voronoi__.cc,
amd.cc, audiodevinfo.cc, audioread.cc, ccolamd.cc, cdisplay.c,
colamd.cc, convhulln.cc, dSparse.cc, dmperm.cc, fftw.cc, gl-render.cc,
lo-error.c, load-save.cc, ls-hdf5.cc, ls-mat5.cc, oct-hdf5-types.cc,
ov-base-int.cc, ov-bool-mat.cc, ov-bool-sparse.cc, ov-bool.cc,
ov-cell.cc, ov-class.cc, ov-complex.cc, ov-cx-mat.cc, ov-cx-sparse.cc,
ov-fcn-handle.cc, ov-fcn-inline.cc, ov-float.cc, ov-flt-complex.cc,
ov-flt-cx-mat.cc, ov-flt-re-mat.cc, ov-java.cc, ov-range.cc,
ov-re-mat.cc, ov-re-sparse.cc, ov-scalar.cc, ov-str-mat.cc,
ov-struct.cc, sparse-chol.cc, sparse-dmsolve.cc, sparse-lu.cc,
sparse-qr.cc, sparse-util.cc, symbfact.cc: Use octave_unused_parameter
to eliminate warnings for conditionally compiled code.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Fri, 13 May 2016 09:36:14 -0400 |
parents | 40de9f8f23a6 |
children | aba2e6293dd8 |
line wrap: on
line source
/* Copyright (C) 2009-2014 John W. Eaton 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 <http://www.gnu.org/licenses/>. */ #ifdef 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 (int *ht, int *wd, int *dp, double *rx, double *ry, int *dpy_avail) { const char *msg = 0; *dpy_avail = 0; #if defined (OCTAVE_USE_WINDOWS_API) HDC hdc = GetDC (0); if (hdc) { *dp = GetDeviceCaps (hdc, BITSPIXEL); *ht = GetDeviceCaps (hdc, VERTRES); *wd = GetDeviceCaps (hdc, HORZRES); double ht_mm = GetDeviceCaps (hdc, VERTSIZE); double wd_mm = GetDeviceCaps (hdc, HORZSIZE); *rx = *wd * 25.4 / wd_mm; *ry = *ht * 25.4 / ht_mm; *dpy_avail = 1; } else msg = "no graphical display found"; #elif defined (HAVE_FRAMEWORK_CARBON) 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. */ double ht_mm = sz_mm.height; double wd_mm = sz_mm.width; *rx = *wd * 25.4 / wd_mm; *ry = *ht * 25.4 / ht_mm; *dpy_avail = 1; } else msg = "no graphical display found"; #elif defined (HAVE_X_WINDOWS) const char *display_name = getenv ("DISPLAY"); if (display_name && *display_name) { Display *display = XOpenDisplay (display_name); if (display) { Screen *screen = DefaultScreenOfDisplay (display); if (screen) { *dp = DefaultDepthOfScreen (screen); *ht = HeightOfScreen (screen); *wd = WidthOfScreen (screen); int screen_number = XScreenNumberOfScreen (screen); double ht_mm = DisplayHeightMM (display, screen_number); double wd_mm = DisplayWidthMM (display, screen_number); *rx = *wd * 25.4 / wd_mm; *ry = *ht * 25.4 / ht_mm; } else msg = "X11 display has no default screen"; XCloseDisplay (display); *dpy_avail = 1; } else msg = "unable to open X11 DISPLAY"; } else msg = "X11 DISPLAY environment variable not set"; #else 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 return msg; }