Mercurial > sdl-ios-xcode
view src/video/x11/SDL_x11image.c @ 934:af585d6efec8
Date: Thu, 17 Jun 2004 11:38:51 -0700 (PDT)
From: Eric Wing <ewing2121@yahoo.com>
Subject: New OS X patch (was Re: [SDL] Bug with inverted mouse coordinates in
I have a new patch for OS X I would like to submit.
First, it appears no further action has been taken on
my fix from Apple on the OpenGL windowed mode mouse
inversion problem. The fix would reunify the code, and
no longer require case checking for which version of
the OS you are running. This is probably a good fix
because the behavior with the old code could change
again with future versions of the OS, so those fixes
are included in this new patch.
But in addition, when I was at Apple, I asked them
about the ability to distinguish between the modifier
keys on the left and right sides of the keyboard (e.g.
Left Shift, Right Shift, Left/Right Alt, L/R Cmd, L/R
Ctrl). They told me that starting with Panther, the OS
began supporting this feature. This has always been a
source of annoyance for me when bringing a program
that comes from Windows or Linux to OS X when the
keybindings happened to need distinguishable left-side
and right-side keys. So the rest of the patch I am
submitting contains new code to support this feature
on Panther (and presumably later versions of the OS).
So after removing the OS version checks for the mouse
inversion problem, I reused the OS version checks to
activate the Left/Right detection of modifier keys. If
you are running Panther (or above), the new code will
attempt to distinguish between sides. For the older
OS's, the code path reverts to the original code.
I've tested with Panther on a G4 Cube, G5 dual
processor, and Powerbook Rev C. The Cube and G5
keyboards demonstrated the ability to distinguish
between sides. The Powerbook seems to only have
left-side keys, but the patch was still able to handle
it by producing the same results as before the patch.
I also wanted to test a non-Apple keyboard.
Unfortunately, I don't have any PC USB keyboards.
However, I was able to borrow a Sun Microsystems USB
keyboard, so I tried that out on the G5, and I got the
correct behavior for left and right sides. I'm
expecting that if it worked with a Sun keyboard, most
other keyboards should work with no problems.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Fri, 20 Aug 2004 22:35:23 +0000 |
parents | 26a0e2d69d39 |
children | 045f186426e1 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2004 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif #include <stdlib.h> #include <unistd.h> #include "SDL_error.h" #include "SDL_endian.h" #include "SDL_events_c.h" #include "SDL_x11image_c.h" #ifndef NO_SHARED_MEMORY /* Shared memory information */ extern int XShmQueryExtension(Display *dpy); /* Not in X11 headers */ /* Shared memory error handler routine */ static int shm_error; static int (*X_handler)(Display *, XErrorEvent *) = NULL; static int shm_errhandler(Display *d, XErrorEvent *e) { if ( e->error_code == BadAccess ) { shm_error = True; return(0); } else return(X_handler(d,e)); } static void try_mitshm(_THIS, SDL_Surface *screen) { if(!use_mitshm) return; shminfo.shmid = shmget(IPC_PRIVATE, screen->h*screen->pitch, IPC_CREAT | 0777); if ( shminfo.shmid >= 0 ) { shminfo.shmaddr = (char *)shmat(shminfo.shmid, 0, 0); shminfo.readOnly = False; if ( shminfo.shmaddr != (char *)-1 ) { shm_error = False; X_handler = XSetErrorHandler(shm_errhandler); XShmAttach(SDL_Display, &shminfo); XSync(SDL_Display, True); XSetErrorHandler(X_handler); if ( shm_error ) shmdt(shminfo.shmaddr); } else { shm_error = True; } shmctl(shminfo.shmid, IPC_RMID, NULL); } else { shm_error = True; } if ( shm_error ) use_mitshm = 0; if ( use_mitshm ) screen->pixels = shminfo.shmaddr; } #endif /* ! NO_SHARED_MEMORY */ /* Various screen update functions available */ static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects); static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects); int X11_SetupImage(_THIS, SDL_Surface *screen) { #ifndef NO_SHARED_MEMORY try_mitshm(this, screen); if(use_mitshm) { SDL_Ximage = XShmCreateImage(SDL_Display, SDL_Visual, this->hidden->depth, ZPixmap, shminfo.shmaddr, &shminfo, screen->w, screen->h); if(!SDL_Ximage) { XShmDetach(SDL_Display, &shminfo); XSync(SDL_Display, False); shmdt(shminfo.shmaddr); screen->pixels = NULL; goto error; } this->UpdateRects = X11_MITSHMUpdate; } if(!use_mitshm) #endif /* not NO_SHARED_MEMORY */ { int bpp; screen->pixels = malloc(screen->h*screen->pitch); if ( screen->pixels == NULL ) { SDL_OutOfMemory(); return -1; } bpp = screen->format->BytesPerPixel; SDL_Ximage = XCreateImage(SDL_Display, SDL_Visual, this->hidden->depth, ZPixmap, 0, (char *)screen->pixels, screen->w, screen->h, 32, 0); if ( SDL_Ximage == NULL ) goto error; /* XPutImage will convert byte sex automatically */ SDL_Ximage->byte_order = (SDL_BYTEORDER == SDL_BIG_ENDIAN) ? MSBFirst : LSBFirst; this->UpdateRects = X11_NormalUpdate; } screen->pitch = SDL_Ximage->bytes_per_line; return(0); error: SDL_SetError("Couldn't create XImage"); return 1; } void X11_DestroyImage(_THIS, SDL_Surface *screen) { if ( SDL_Ximage ) { XDestroyImage(SDL_Ximage); #ifndef NO_SHARED_MEMORY if ( use_mitshm ) { XShmDetach(SDL_Display, &shminfo); XSync(SDL_Display, False); shmdt(shminfo.shmaddr); } #endif /* ! NO_SHARED_MEMORY */ SDL_Ximage = NULL; } if ( screen ) { screen->pixels = NULL; } } /* Determine the number of CPUs in the system */ static int num_CPU(void) { static int num_cpus = 0; if(!num_cpus) { #if defined(__linux) char line[BUFSIZ]; FILE *pstat = fopen("/proc/stat", "r"); if ( pstat ) { while ( fgets(line, sizeof(line), pstat) ) { if (memcmp(line, "cpu", 3) == 0 && line[3] != ' ') { ++num_cpus; } } fclose(pstat); } #elif defined(__sgi) num_cpus = sysconf(_SC_NPROC_ONLN); #elif defined(_SC_NPROCESSORS_ONLN) /* number of processors online (SVR4.0MP compliant machines) */ num_cpus = sysconf(_SC_NPROCESSORS_ONLN); #elif defined(_SC_NPROCESSORS_CONF) /* number of processors configured (SVR4.0MP compliant machines) */ num_cpus = sysconf(_SC_NPROCESSORS_CONF); #endif if ( num_cpus <= 0 ) { num_cpus = 1; } } return num_cpus; } int X11_ResizeImage(_THIS, SDL_Surface *screen, Uint32 flags) { int retval; X11_DestroyImage(this, screen); if ( flags & SDL_OPENGL ) { /* No image when using GL */ retval = 0; } else { retval = X11_SetupImage(this, screen); /* We support asynchronous blitting on the display */ if ( flags & SDL_ASYNCBLIT ) { /* This is actually slower on single-CPU systems, probably because of CPU contention between the X server and the application. Note: Is this still true with XFree86 4.0? */ if ( num_CPU() > 1 ) { screen->flags |= SDL_ASYNCBLIT; } } } return(retval); } /* We don't actually allow hardware surfaces other than the main one */ int X11_AllocHWSurface(_THIS, SDL_Surface *surface) { return(-1); } void X11_FreeHWSurface(_THIS, SDL_Surface *surface) { return; } int X11_LockHWSurface(_THIS, SDL_Surface *surface) { if ( (surface == SDL_VideoSurface) && blit_queued ) { XSync(GFX_Display, False); blit_queued = 0; } return(0); } void X11_UnlockHWSurface(_THIS, SDL_Surface *surface) { return; } int X11_FlipHWSurface(_THIS, SDL_Surface *surface) { return(0); } static void X11_NormalUpdate(_THIS, int numrects, SDL_Rect *rects) { int i; for (i = 0; i < numrects; ++i) { if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ continue; } XPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, rects[i].x, rects[i].y, rects[i].x, rects[i].y, rects[i].w, rects[i].h); } if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { XFlush(GFX_Display); blit_queued = 1; } else { XSync(GFX_Display, False); } } static void X11_MITSHMUpdate(_THIS, int numrects, SDL_Rect *rects) { #ifndef NO_SHARED_MEMORY int i; for ( i=0; i<numrects; ++i ) { if ( rects[i].w == 0 || rects[i].h == 0 ) { /* Clipped? */ continue; } XShmPutImage(GFX_Display, SDL_Window, SDL_GC, SDL_Ximage, rects[i].x, rects[i].y, rects[i].x, rects[i].y, rects[i].w, rects[i].h, False); } if ( SDL_VideoSurface->flags & SDL_ASYNCBLIT ) { XFlush(GFX_Display); blit_queued = 1; } else { XSync(GFX_Display, False); } #endif /* ! NO_SHARED_MEMORY */ } /* There's a problem with the automatic refreshing of the display. Even though the XVideo code uses the GFX_Display to update the video memory, it appears that updating the window asynchronously from a different thread will cause "blackouts" of the window. This is a sort of a hacked workaround for the problem. */ static int enable_autorefresh = 1; void X11_DisableAutoRefresh(_THIS) { --enable_autorefresh; } void X11_EnableAutoRefresh(_THIS) { ++enable_autorefresh; } void X11_RefreshDisplay(_THIS) { /* Don't refresh a display that doesn't have an image (like GL) Instead, post an expose event so the application can refresh. */ if ( ! SDL_Ximage || (enable_autorefresh <= 0) ) { SDL_PrivateExpose(); return; } #ifndef NO_SHARED_MEMORY if ( this->UpdateRects == X11_MITSHMUpdate ) { XShmPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, 0, 0, 0, 0, this->screen->w, this->screen->h, False); } else #endif /* ! NO_SHARED_MEMORY */ { XPutImage(SDL_Display, SDL_Window, SDL_GC, SDL_Ximage, 0, 0, 0, 0, this->screen->w, this->screen->h); } XSync(SDL_Display, False); }