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/* Copyright (C) 2007-2008 The Android Open Source Project
**
** This software is licensed under the terms of the GNU General Public
** License version 2, as published by the Free Software Foundation, and
** may be copied, distributed, and modified under those terms.
**
** This program 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.
*/
#include "android/utils/display.h"
#include "android/utils/debug.h"
#define D(...) VERBOSE_PRINT(init,__VA_ARGS__)
/** HOST RESOLUTION SETTINGS
**
** return the main monitor's DPI resolution according to the host device
** beware: this is not always reliable or even obtainable.
**
** returns 0 on success, or -1 in case of error (e.g. the system returns funky values)
**/
/** NOTE: the following code assumes that we exclusively use X11 on Linux, and Quartz on OS X
**/
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <SDL_syswm.h>
int
get_monitor_resolution( int *px_dpi, int *py_dpi )
{
HDC displayDC = CreateDC( "DISPLAY", NULL, NULL, NULL );
int xdpi, ydpi;
if (displayDC == NULL) {
D( "%s: could not get display DC\n", __FUNCTION__ );
return -1;
}
xdpi = GetDeviceCaps( displayDC, LOGPIXELSX );
ydpi = GetDeviceCaps( displayDC, LOGPIXELSY );
/* sanity checks */
if (xdpi < 20 || xdpi > 400 || ydpi < 20 || ydpi > 400) {
D( "%s: bad resolution: xpi=%d ydpi=%d", __FUNCTION__,
xdpi, ydpi );
return -1;
}
*px_dpi = xdpi;
*py_dpi = ydpi;
return 0;
}
int
get_nearest_monitor_rect( int *x, int *y, int *width, int *height )
{
SDL_SysWMinfo info;
HMONITOR monitor;
MONITORINFO monitorInfo;
SDL_VERSION(&info.version);
if ( !SDL_GetWMInfo(&info) ) {
D( "%s: SDL_GetWMInfo() failed: %s", __FUNCTION__, SDL_GetError());
return -1;
}
monitor = MonitorFromWindow( info.window, MONITOR_DEFAULTTONEAREST );
monitorInfo.cbSize = sizeof(monitorInfo);
GetMonitorInfo( monitor, &monitorInfo );
*x = monitorInfo.rcMonitor.left;
*y = monitorInfo.rcMonitor.top;
*width = monitorInfo.rcMonitor.right - *x;
*height = monitorInfo.rcMonitor.bottom - *y;
D("%s: found (x,y,w,h)=(%d,%d,%d,%d)", __FUNCTION__,
*x, *y, *width, *height);
return 0;
}
#elif defined __APPLE__
/* the real implementation is in display-quartz.m, but
* unfortunately, the Android build system doesn't know
* how to build Objective-C sources, so provide stubs
* here instead.
*
* CONFIG_NO_COCOA is set by Makefile.android
*/
#ifdef CONFIG_NO_COCOA
int
get_monitor_resolution( int *px_dpi, int *py_dpi )
{
return -1;
}
int
get_nearest_monitor_rect( int *x, int *y, int *width, int *height )
{
return -1;
}
#endif /* CONFIG_NO_COCOA */
#else /* Linux and others */
#include <SDL.h>
#include <SDL_syswm.h>
#include <dlfcn.h>
#include <X11/Xlib.h>
#define MM_PER_INCH 25.4
#define DYNLINK_FUNCTIONS \
DYNLINK_FUNC(int,XDefaultScreen,(Display*)) \
DYNLINK_FUNC(int,XDisplayWidth,(Display*,int)) \
DYNLINK_FUNC(int,XDisplayWidthMM,(Display*,int)) \
DYNLINK_FUNC(int,XDisplayHeight,(Display*,int)) \
DYNLINK_FUNC(int,XDisplayHeightMM,(Display*,int)) \
#define DYNLINK_FUNCTIONS_INIT \
x11_dynlink_init
#include "dynlink.h"
static int x11_lib_inited;
static void* x11_lib;
int
x11_lib_init( void )
{
if (!x11_lib_inited) {
x11_lib_inited = 1;
x11_lib = dlopen( "libX11.so", RTLD_NOW );
if (x11_lib == NULL) {
x11_lib = dlopen( "libX11.so.6", RTLD_NOW );
}
if (x11_lib == NULL) {
D("%s: Could not find libX11.so on this machine",
__FUNCTION__);
return -1;
}
if (x11_dynlink_init(x11_lib) < 0) {
D("%s: didn't find necessary symbols in libX11.so",
__FUNCTION__);
dlclose(x11_lib);
x11_lib = NULL;
}
}
return x11_lib ? 0 : -1;
}
int
get_monitor_resolution( int *px_dpi, int *py_dpi )
{
SDL_SysWMinfo info;
Display* display;
int screen;
int width, width_mm, height, height_mm, xdpi, ydpi;
SDL_VERSION(&info.version);
if ( !SDL_GetWMInfo(&info) ) {
D( "%s: SDL_GetWMInfo() failed: %s", __FUNCTION__, SDL_GetError());
return -1;
}
if (x11_lib_init() < 0)
return -1;
display = info.info.x11.display;
screen = FF(XDefaultScreen)(display);
width = FF(XDisplayWidth)(display, screen);
width_mm = FF(XDisplayWidthMM)(display, screen);
height = FF(XDisplayHeight)(display, screen);
height_mm = FF(XDisplayHeightMM)(display, screen);
if (width_mm <= 0 || height_mm <= 0) {
D( "%s: bad screen dimensions: width_mm = %d, height_mm = %d",
__FUNCTION__, width_mm, height_mm);
return -1;
}
D( "%s: found screen width=%d height=%d width_mm=%d height_mm=%d",
__FUNCTION__, width, height, width_mm, height_mm );
xdpi = width * MM_PER_INCH / width_mm;
ydpi = height * MM_PER_INCH / height_mm;
if (xdpi < 20 || xdpi > 400 || ydpi < 20 || ydpi > 400) {
D( "%s: bad resolution: xpi=%d ydpi=%d", __FUNCTION__,
xdpi, ydpi );
return -1;
}
*px_dpi = xdpi;
*py_dpi = ydpi;
return 0;
}
int
get_nearest_monitor_rect( int *x, int *y, int *width, int *height )
{
SDL_SysWMinfo info;
Display* display;
int screen;
SDL_VERSION(&info.version);
if ( !SDL_GetWMInfo(&info) ) {
D( "%s: SDL_GetWMInfo() failed: %s", __FUNCTION__, SDL_GetError());
return -1;
}
if (x11_lib_init() < 0)
return -1;
display = info.info.x11.display;
screen = FF(XDefaultScreen)(display);
*x = 0;
*y = 0;
*width = FF(XDisplayWidth)(display, screen);
*height = FF(XDisplayHeight)(display, screen);
D("%s: found (x,y,w,h)=(%d,%d,%d,%d)", __FUNCTION__,
*x, *y, *width, *height);
return 0;
}
#endif
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