Mercurial > sdl-ios-xcode
view src/video/cybergfx/SDL_cgxmodes.c @ 765:4c2ba6161939
Editors Note: The original patch was modified to use SDL_Delay() instead of
nanosleep because nanosleep may not be portable to all systems
using SDL with the ALSA backend. This may be a moot point with
the switch to blocking writes anyway...
Date: Sat, 27 Dec 2003 21:47:36 +0100
From: Michel Daenzer
To: Debian Bug Tracking System
Subject: [SDL] Bug#225252: [PATCH] ALSA fixes
Package: libsdl1.2debian-all
Version: 1.2.6-2
Severity: normal
Tags: patch
For SDL 1.2.6, the ALSA backend was changed to call snd_pcm_open() with
SND_PCM_NONBLOCK. That's a good idea per se, however, it causes high CPU
usage, interrupted sound and stuttering in some games here. Taking a nanosleep
whenever snd_pcm_writei() returns -EAGAIN fixes this, but I think it's more
efficient to use blocking mode for the actual sound playback. Feedback from the
SDL and ALSA lists appreciated.
The patch also fixes the default ALSA device to be used.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 04 Jan 2004 15:40:50 +0000 |
parents | dcb5e869f8b5 |
children | c9b51268668f |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000 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 /* Utilities for getting and setting the X display mode */ /* #include <stdlib.h> #include <string.h> */ #include "SDL_timer.h" #include "SDL_error.h" #include "SDL_events.h" #include "SDL_events_c.h" #include "SDL_cgxvideo.h" #include "SDL_cgxwm_c.h" #include "SDL_cgxmodes_c.h" #define CGX_DEBUG static void set_best_resolution(_THIS, int width, int height) { Uint32 idok; int depth=8; if(SDL_Display) depth=GetCyberMapAttr(SDL_Display->RastPort.BitMap,CYBRMATTR_DEPTH); idok=BestCModeIDTags(CYBRBIDTG_NominalWidth,width, CYBRBIDTG_NominalHeight,height, CYBRBIDTG_Depth,depth, TAG_DONE); if(idok!=INVALID_ID) { if(SDL_Display) { if(currently_fullscreen) CloseScreen(SDL_Display); else UnlockPubScreen(NULL,SDL_Display); } SDL_Display=GFX_Display=OpenScreenTags(NULL,SA_Width,width,SA_Height,height, SA_Depth,depth,SA_DisplayID,idok, SA_ShowTitle,FALSE, TAG_DONE); } } static void get_real_resolution(_THIS, int* w, int* h) { *w = /*SDL_Display->Width*/ SDL_Window->Width-SDL_Window->BorderLeft-SDL_Window->BorderRight; *h = /*SDL_Display->Height*/ SDL_Window->Height-SDL_Window->BorderBottom-SDL_Window->BorderTop; } static void move_cursor_to(_THIS, int x, int y) { /* XWarpPointer(SDL_Display, None, SDL_Root, 0, 0, 0, 0, x, y); */ /* DA FARE! */ } static void add_visual(_THIS, int depth, int class) { Uint32 tID; tID=BestCModeIDTags(CYBRBIDTG_Depth,depth, CYBRBIDTG_NominalWidth,640, CYBRBIDTG_NominalHeight,480, TAG_DONE); if(tID!=INVALID_ID) { int n = this->hidden->nvisuals; this->hidden->visuals[n].depth = depth; this->hidden->visuals[n].visual = tID; this->hidden->visuals[n].bpp = GetCyberIDAttr(CYBRIDATTR_BPPIX,tID); this->hidden->nvisuals++; } } #define TrueColor 1 #define PseudoColor 2 int CGX_GetVideoModes(_THIS) { int i; ULONG nextid; int nmodes=0; SDL_modelist=NULL; nextid=NextDisplayInfo(INVALID_ID); while(nextid!=INVALID_ID) { if(IsCyberModeID(nextid)) { DisplayInfoHandle h; if(h=FindDisplayInfo(nextid)) { struct DimensionInfo info; if(GetDisplayInfoData(h,(char *)&info,sizeof(struct DimensionInfo),DTAG_DIMS,NULL)) { int ok=0; for(i=0;i<nmodes;i++) { if( SDL_modelist[i]->w == (info.Nominal.MaxX+1) && SDL_modelist[i]->h == (info.Nominal.MaxY+1) ) ok=1; } if(!ok) { nmodes++; SDL_modelist = (SDL_Rect **)realloc(SDL_modelist,(nmodes+1)*sizeof(SDL_Rect *)); SDL_modelist[nmodes]=NULL; if ( SDL_modelist ) { SDL_modelist[nmodes-1] = (SDL_Rect *)malloc(sizeof(SDL_Rect)); if ( SDL_modelist[nmodes-1] == NULL ) break; SDL_modelist[nmodes-1]->x = 0; SDL_modelist[nmodes-1]->y = 0; SDL_modelist[nmodes-1]->w = info.Nominal.MaxX+1; SDL_modelist[nmodes-1]->h = info.Nominal.MaxY+1; } } } } } nextid=NextDisplayInfo(nextid); } this->hidden->nvisuals = 0; /* Search for the visuals in deepest-first order, so that the first will be the richest one */ add_visual(this, 32, TrueColor); add_visual(this, 24, TrueColor); add_visual(this, 16, TrueColor); add_visual(this, 15, TrueColor); add_visual(this, 8, PseudoColor); if(this->hidden->nvisuals == 0) { SDL_SetError("Found no sufficiently capable CGX visuals"); return -1; } if ( SDL_modelist == NULL ) { SDL_modelist = (SDL_Rect **)malloc((1+1)*sizeof(SDL_Rect *)); i = 0; if ( SDL_modelist ) { SDL_modelist[i] = (SDL_Rect *)malloc(sizeof(SDL_Rect)); if ( SDL_modelist[i] ) { SDL_modelist[i]->x = 0; SDL_modelist[i]->y = 0; SDL_modelist[i]->w = SDL_Display->Width; SDL_modelist[i]->h = SDL_Display->Height; ++i; } SDL_modelist[i] = NULL; } } D( if ( SDL_modelist ) { bug("CGX video mode list: (%ld)\n",nmodes); for ( i=0; SDL_modelist[i]; ++i ) { bug( "\t%ld x %ld\n", SDL_modelist[i]->w, SDL_modelist[i]->h); } } ); D( { bug("CGX visuals list: (%ld)\n",this->hidden->nvisuals); for(i=0;i<this->hidden->nvisuals;i++) bug("\t%lx - depth: %ld bpp: %ld\n",this->hidden->visuals[i].visual,this->hidden->visuals[i].depth,this->hidden->visuals[i].bpp); } ); return 0; } int CGX_SupportedVisual(_THIS, SDL_PixelFormat *format) { int i; for(i = 0; i < this->hidden->nvisuals; i++) { if(this->hidden->visuals[i].depth == format->BitsPerPixel) // Era bpp return 1; } return 0; } SDL_Rect **CGX_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) { if ( CGX_SupportedVisual(this, format) ) { if ( flags & SDL_FULLSCREEN ) { return(SDL_modelist); } else { return((SDL_Rect **)-1); } } else { return((SDL_Rect **)0); } } void CGX_FreeVideoModes(_THIS) { int i; if ( SDL_modelist ) { for ( i=0; SDL_modelist[i]; ++i ) { free(SDL_modelist[i]); } free(SDL_modelist); SDL_modelist = NULL; } } int CGX_ResizeFullScreen(_THIS) { int x, y; int real_w, real_h; if ( currently_fullscreen ) { /* Per ora non faccio nulla qui */ } return(1); } void _QueueEnterFullScreen(_THIS) { } int CGX_EnterFullScreen(_THIS) { int okay; Uint32 saved_flags; okay = 1; saved_flags = this->screen->flags; if ( ! currently_fullscreen ) { int real_w, real_h; /* Map the fullscreen window to blank the screen */ get_real_resolution(this, &real_w, &real_h); CGX_DestroyWindow(this,this->screen); set_best_resolution(this, real_w,real_h); /* Grab the mouse on the fullscreen window The event handling will know when we become active, and then enter fullscreen mode if we can't grab the mouse this time. */ #if 0 if ( (XGrabPointer(SDL_Display, FSwindow, True, 0, GrabModeAsync, GrabModeAsync, FSwindow, None, CurrentTime) != GrabSuccess) || (XGrabKeyboard(SDL_Display, WMwindow, True, GrabModeAsync, GrabModeAsync, CurrentTime) != 0) ) { XUnmapWindow(SDL_Display, FSwindow); X11_WaitUnmapped(this, FSwindow); X11_QueueEnterFullScreen(this); return(0); } #endif currently_fullscreen = 1; this->screen->flags = saved_flags; CGX_CreateWindow(this,this->screen,real_w,real_h,GetCyberMapAttr(SDL_Display->RastPort.BitMap,CYBRMATTR_DEPTH),this->screen->flags); /* Set the new resolution */ okay = CGX_ResizeFullScreen(this); if ( ! okay ) { CGX_LeaveFullScreen(this); } /* Set the colormap */ /* if ( SDL_XColorMap ) { XInstallColormap(SDL_Display, SDL_XColorMap); } */ } // CGX_GrabInputNoLock(this, this->input_grab | SDL_GRAB_FULLSCREEN); return(okay); } int CGX_LeaveFullScreen(_THIS) { if ( currently_fullscreen ) { int width,height; if ( SDL_Window ) { CloseWindow(SDL_Window); SDL_Window=NULL; } CloseScreen(SDL_Display); GFX_Display=SDL_Display=LockPubScreen(NULL); currently_fullscreen = 0; CGX_CreateWindow(this,this->screen,this->screen->w,this->screen->h,GetCyberMapAttr(SDL_Display->RastPort.BitMap,CYBRMATTR_DEPTH),this->screen->flags); CGX_ResizeImage(this,this->screen,0L); } return(0); }