Mercurial > sdl-ios-xcode
annotate src/SDL_assert_c.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> |
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date | Wed, 19 Jan 2011 23:56:16 -0800 |
parents | 791b3256fb22 |
children | b530ef003506 |
rev | line source |
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4472
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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1 /* |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
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2 SDL - Simple DirectMedia Layer |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
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3 Copyright (C) 1997-2010 Sam Lantinga |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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4 |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
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5 This library is free software; you can redistribute it and/or |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
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6 modify it under the terms of the GNU Lesser General Public |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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7 License as published by the Free Software Foundation; either |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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8 version 2.1 of the License, or (at your option) any later version. |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
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9 |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
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10 This library is distributed in the hope that it will be useful, |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
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13 Lesser General Public License for more details. |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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14 |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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15 You should have received a copy of the GNU Lesser General Public |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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16 License along with this library; if not, write to the Free Software |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
791b3256fb22
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Sam Lantinga <slouken@libsdl.org>
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18 |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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19 Sam Lantinga |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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20 slouken@libsdl.org |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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21 */ |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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22 |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
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23 extern int SDL_AssertionsInit(void); |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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24 extern void SDL_AssertionsQuit(void); |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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25 |
791b3256fb22
Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents:
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26 /* vi: set ts=4 sw=4 expandtab: */ |