Mercurial > sdl-ios-xcode
view src/video/photon/SDL_ph_video.h @ 968:4675910b0b7b
Date: Mon, 11 Oct 2004 15:17:27 +0300 (EEST)
From: Hannu Savolainen
Subject: Re: SDL uses obsolete OSS features
I did some work on getting OSS to work better with SDL. There have been
some problems with select which should be fixed now.
I'm having some problems in understanding what is the purpose of the
DSP_WaitAudio() routine. I added a return to the very beginning of this
routine and commendted out the define for USE_BLOCKING_WRITES. At least
lbreakout2 seems to work as well as earlier. The latencies are the same.
An ordinary blocking write does exactly the same thing than DSP_WaitAudio
does. So I would recommend using the USE_BLOCKING_WRITES approach and
removing everything from the DSP_WaitAudio routine. Also enabling
USE_BLOCKING_WRITES makes it possible to simplify DSP_PlayAudio() because
you don't need to handle the partial writes (the do-while loop).
Attached is a patch against SDL-1.2.7. After these changes SDL will use
OSS as it's designed to be used (make it as simple as possible). This code
should work with all OSS implementations because it uses only the very
fundamental features that have been there since the jurassic times.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Fri, 12 Nov 2004 21:39:04 +0000 |
parents | 4ab6d1fd028f |
children | 19418e4422cb |
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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 */ #ifndef __SDL_PH_VIDEO_H__ #define __SDL_PH_VIDEO_H__ #include "SDL_mouse.h" #include "SDL_sysvideo.h" #include <sys/neutrino.h> #include <Ph.h> #include <Pt.h> #include <photon/Pg.h> #include <photon/PdDirect.h> #ifdef HAVE_OPENGL #if (_NTO_VERSION < 630) #include <photon/PdGL.h> #else #include <GL/qnxgl.h> #include <GL/GLPh.h> #endif /* 6.3.0 */ #endif /* HAVE_OPENGL */ /* Hidden "this" pointer for the video functions */ #define _THIS SDL_VideoDevice* this #define PH_OGL_MAX_ATTRIBS 32 #define SDLPH_PAL_NONE 0x00000000L #define SDLPH_PAL_EMULATE 0x00000001L #define SDLPH_PAL_SYSTEM 0x00000002L typedef struct { unsigned char* Y; unsigned char* V; unsigned char* U; } FRAMEDATA; /* Mask values for SDL_ReallocFormat() */ struct ColourMasks { Uint32 red; Uint32 green; Uint32 blue; Uint32 alpha; Uint32 bpp; }; /* Private display data */ struct SDL_PrivateVideoData { PgDisplaySettings_t mode_settings; PtWidget_t *Window; /* used to handle input events */ PhImage_t *image; /* used to display image */ #ifdef HAVE_OPENGL #if (_NTO_VERSION < 630) PdOpenGLContext_t* OGLContext; /* OpenGL context */ void* OGLBuffers; /* OpenGL buffers (unused) */ #else qnxglc_t* OGLContext; /* OpenGL context for the 6.3 */ qnxgl_bufs_t* OGLBuffers; /* OpenGL buffers for the 6.3 */ #endif /* 630 */ Uint32 OGLFlags; /* OpenGL flags */ Uint32 OGLBPP; /* OpenGL bpp */ #endif /* HAVE_OPENGL */ PgColor_t savedpal[_Pg_MAX_PALETTE]; PgColor_t syspalph[_Pg_MAX_PALETTE]; struct { PdDirectContext_t* direct_context; PdOffscreenContext_t* offscreen_context; PdOffscreenContext_t* offscreen_backcontext; PhDrawContext_t* oldDC; uint8_t* dc_ptr; unsigned char* CurrentFrameData; unsigned char* FrameData0; unsigned char* FrameData1; Uint32 current; Uint32 flags; } ocimage; PgHWCaps_t graphics_card_caps; /* Graphics card caps at the moment of start */ PgVideoModeInfo_t desktop_mode; /* Current desktop video mode information */ int old_video_mode; /* Stored mode before fullscreen switch */ int old_refresh_rate; /* Stored refresh rate befor fullscreen switch */ int mouse_relative; WMcursor* BlankCursor; uint32_t videomode_emulatemode; Uint32 visualbpp; /* current visual bpp */ Uint32 desktopbpp; /* bpp of desktop at the moment of start */ Uint32 desktoppal; /* palette mode emulation or system */ int currently_fullscreen; int currently_hided; /* 1 - window hided (minimazed), 0 - normal */ int currently_maximized; /* 1 - window hided (minimazed), 0 - normal */ PhEvent_t* event; SDL_Overlay* overlay; }; #define mode_settings (this->hidden->mode_settings) #define window (this->hidden->Window) #define SDL_Image (this->hidden->image) #define OCImage (this->hidden->ocimage) #define old_video_mode (this->hidden->old_video_mode) #define old_refresh_rate (this->hidden->old_refresh_rate) #define graphics_card_caps (this->hidden->graphics_card_caps) #define desktopbpp (this->hidden->desktopbpp) #define visualbpp (this->hidden->visualbpp) #define desktoppal (this->hidden->desktoppal) #define savedpal (this->hidden->savedpal) #define syspalph (this->hidden->syspalph) #define currently_fullscreen (this->hidden->currently_fullscreen) #define currently_hided (this->hidden->currently_hided) #define currently_maximized (this->hidden->currently_maximized) #define event (this->hidden->event) #define current_overlay (this->hidden->overlay) #define desktop_mode (this->hidden->desktop_mode) #define mouse_relative (this->hidden->mouse_relative) #define SDL_BlankCursor (this->hidden->BlankCursor) #define videomode_emulatemode (this->hidden->videomode_emulatemode) #ifdef HAVE_OPENGL #define oglctx (this->hidden->OGLContext) #define oglbuffers (this->hidden->OGLBuffers) #define oglflags (this->hidden->OGLFlags) #define oglbpp (this->hidden->OGLBPP) #endif /* HAVE_OPENGL */ #endif /* __SDL_PH_VIDEO_H__ */