Mercurial > sdl-ios-xcode
view include/SDL_config_nintendods.h @ 5053:b5b42be9333c
Fixed bug #1026
Vittorio Giovara 2010-07-16 19:09:28 PDT
i was reading SDL_renderer_gles and i noticed that every time we there
is some gl call the gl state is modified with a couple of
glEnableClientState()/glDisableClientState.
While this is completely fine for desktops systems, this is a major
performace kill on mobile devices, right where opengles is
implemented.
Normal practice in this case is to update the glstate once, keep it
always the same and disable/enable other states only in very special
occasions.
On the web there's plenty of documentation (on the top of my head
http://developer.apple.com/iphone/library/documentation/3DDrawing/Conceptual/OpenGLES_ProgrammingGuide/Performance/Performance.html#//apple_ref/doc/uid/TP40008793-CH105-SW5
) and i personally tried this.
I modified my code and got a 10 fps boost, then modified SDL_render_gles and
shifted from 40 fps to 50 fps alone -- considering that i started from ~30fps i
got an 80% performance increase with this technique.
I have attached a dif of my changes, hope that it will be included in
mainstream.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 19 Jan 2011 23:56:16 -0800 |
| parents | f7b03b6838cb |
| children | b530ef003506 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2010 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #ifndef _SDL_config_nintendods_h #define _SDL_config_nintendods_h #include "SDL_platform.h" /* This is a set of defines to configure the SDL features */ #if !defined(_STDINT_H_) && (!defined(HAVE_STDINT_H) || !_HAVE_STDINT_H) typedef signed char int8_t; typedef unsigned char uint8_t; typedef signed short int16_t; typedef unsigned short uint16_t; typedef signed int int32_t; typedef unsigned int uint32_t; typedef signed long long int64_t; typedef unsigned long long uint64_t; /* LiF: __PTRDIFF_TYPE__ was causing errors of conflicting typedefs with the <stdint.h> shipping with devkitARM. copied a similar ifdef from it. */ #ifndef __PTRDIFF_TYPE__ typedef unsigned long uintptr_t; #else typedef unsigned __PTRDIFF_TYPE__ uintptr_t; #endif #endif /* !_STDINT_H_ && !HAVE_STDINT_H */ #define SDL_HAS_64BIT_TYPE 1 /* Useful headers */ #define HAVE_SYS_TYPES_H 1 #define HAVE_STDIO_H 1 #define STDC_HEADERS 1 #define HAVE_STRING_H 1 #define HAVE_CTYPE_H 1 /* C library functions */ #define HAVE_MALLOC 1 #define HAVE_CALLOC 1 #define HAVE_REALLOC 1 #define HAVE_FREE 1 #define HAVE_ALLOCA 1 #define HAVE_GETENV 1 #define HAVE_SETENV 1 #define HAVE_PUTENV 1 #define HAVE_QSORT 1 #define HAVE_ABS 1 #define HAVE_BCOPY 1 #define HAVE_MEMSET 1 #define HAVE_MEMCPY 1 #define HAVE_MEMMOVE 1 #define HAVE_MEMCMP 1 #define HAVE_STRLEN 1 #define HAVE_STRDUP 1 #define HAVE_INDEX 1 #define HAVE_RINDEX 1 #define HAVE_STRCHR 1 #define HAVE_STRRCHR 1 #define HAVE_STRSTR 1 #define HAVE_STRTOL 1 #define HAVE_STRTOD 1 #define HAVE_ATOI 1 #define HAVE_ATOF 1 #define HAVE_STRCMP 1 #define HAVE_STRNCMP 1 #define HAVE_STRICMP 1 #define HAVE_STRCASECMP 1 #define HAVE_SSCANF 1 #define HAVE_SNPRINTF 1 #define HAVE_VSNPRINTF 1 /* DS isn't that sophisticated */ #define LACKS_SYS_MMAN_H 1 /* Enable various audio drivers */ #define SDL_AUDIO_DRIVER_NDS 1 /*#define SDL_AUDIO_DRIVER_DUMMY 1 TODO: uncomment this later*/ /* Enable various input drivers */ #define SDL_JOYSTICK_NDS 1 /*#define SDL_JOYSTICK_DUMMY 1 TODO: uncomment this later*/ /* DS has no dynamic linking afaik */ #define SDL_LOADSO_DISABLED 1 /* Enable various threading systems */ /*#define SDL_THREAD_NDS 1*/ #define SDL_THREADS_DISABLED 1 /* Enable various timer systems */ #define SDL_TIMER_NDS 1 /* Enable various video drivers */ #define SDL_VIDEO_DRIVER_NDS 1 /*#define SDL_VIDEO_DRIVER_DUMMY 1 TODO: uncomment this later*/ /* Enable system power support */ #define SDL_POWER_NINTENDODS 1 #endif /* _SDL_config_nintendods_h */