Mercurial > sdl-ios-xcode
view src/video/qtopia/SDL_QWin.h @ 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 | 969fbd4dcd4e |
children | b8d311d90021 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001 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 #ifndef _SDL_QWin_h #define _SDL_QWin_h #include <stdio.h> #include <qimage.h> #include <qpixmap.h> #include <qwidget.h> #include <qpainter.h> #include <qdirectpainter_qws.h> #include "SDL_events.h" extern "C" { #include "SDL_events_c.h" }; typedef enum { SDL_QT_NO_ROTATION = 0, SDL_QT_ROTATION_90, SDL_QT_ROTATION_270 } screenRotationT; extern screenRotationT screenRotation; class SDL_QWin : public QWidget { void QueueKey(QKeyEvent *e, int pressed); public: SDL_QWin(const QSize& size); virtual ~SDL_QWin(); virtual bool shown(void) { return isVisible(); } /* If called, the next resize event will not be forwarded to SDL. */ virtual void inhibitResize(void) { my_inhibit_resize = true; } void setImage(QImage *image); void setOffset(int x, int y) { my_offset = QPoint(x, y); } void GetXYOffset(int &x, int &y) { x = my_offset.x(); y = my_offset.y(); } QImage *image(void) { return my_image; } void setWFlags(WFlags flags) { QWidget::setWFlags(flags); my_flags = flags; } const QPoint& mousePos() const { return my_mouse_pos; } void setMousePos(const QPoint& newpos); void setFullscreen(bool); bool lockScreen(bool force=false); void unlockScreen(); void repaintRect(const QRect& rect); protected: /* Handle resizing of the window */ virtual void resizeEvent(QResizeEvent *e); void focusInEvent(QFocusEvent *); void focusOutEvent(QFocusEvent *); void closeEvent(QCloseEvent *e); void mouseMoveEvent(QMouseEvent *e); void mousePressEvent(QMouseEvent *e); void mouseReleaseEvent(QMouseEvent *e); void paintEvent(QPaintEvent *ev); void keyPressEvent(QKeyEvent *e) { QueueKey(e, 1); } void keyReleaseEvent(QKeyEvent *e) { QueueKey(e, 0); } private: bool repaintRotation0(const QRect& rect); bool repaintRotation1(const QRect& rect); bool repaintRotation3(const QRect& rect); void enableFullscreen(); QDirectPainter *my_painter; QImage *my_image; bool my_inhibit_resize; QPoint my_offset; QPoint my_mouse_pos; WFlags my_flags; WFlags my_has_fullscreen; unsigned int my_locked; }; #endif /* _SDL_QWin_h */