Mercurial > sdl-ios-xcode
annotate src/power/SDL_power.c @ 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 | 42e1092225f9 |
children | b530ef003506 |
rev | line source |
---|---|
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
1 /* |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
2 SDL - Simple DirectMedia Layer |
3697 | 3 Copyright (C) 1997-2010 Sam Lantinga |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
4 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
5 This library is free software; you can redistribute it and/or |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
6 modify it under the terms of the GNU Lesser General Public |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
7 License as published by the Free Software Foundation; either |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
8 version 2.1 of the License, or (at your option) any later version. |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
9 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
10 This library is distributed in the hope that it will be useful, |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
13 Lesser General Public License for more details. |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
14 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
18 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
19 Sam Lantinga |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
20 slouken@libsdl.org |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
21 */ |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
22 #include "SDL_config.h" |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
23 #include "SDL_power.h" |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
24 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
25 /* |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
26 * Returns SDL_TRUE if we have a definitive answer. |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
27 * SDL_FALSE to try next implementation. |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
28 */ |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
29 typedef SDL_bool |
3186 | 30 (*SDL_GetPowerInfo_Impl) (SDL_PowerState * state, int *seconds, |
31 int *percent); | |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
32 |
3186 | 33 SDL_bool SDL_GetPowerInfo_Linux_proc_acpi(SDL_PowerState *, int *, int *); |
34 SDL_bool SDL_GetPowerInfo_Linux_proc_apm(SDL_PowerState *, int *, int *); | |
35 SDL_bool SDL_GetPowerInfo_Windows(SDL_PowerState *, int *, int *); | |
36 SDL_bool SDL_GetPowerInfo_MacOSX(SDL_PowerState *, int *, int *); | |
37 SDL_bool SDL_GetPowerInfo_BeOS(SDL_PowerState *, int *, int *); | |
38 SDL_bool SDL_GetPowerInfo_NintendoDS(SDL_PowerState *, int *, int *); | |
4444
42e1092225f9
Implemented SDL power APIs for iPhoneOS.
Ryan C. Gordon <icculus@icculus.org>
parents:
3697
diff
changeset
|
39 SDL_bool SDL_GetPowerInfo_UIKit(SDL_PowerState *, int *, int *); |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
40 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
41 #ifndef SDL_POWER_DISABLED |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
42 #ifdef SDL_POWER_HARDWIRED |
3272
e8f63b28947d
Removed outdated Dreamcast support
Sam Lantinga <slouken@libsdl.org>
parents:
3269
diff
changeset
|
43 /* This is for things that _never_ have a battery */ |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
44 static SDL_bool |
3186 | 45 SDL_GetPowerInfo_Hardwired(SDL_PowerState * state, int *seconds, int *percent) |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
46 { |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
47 *seconds = -1; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
48 *percent = -1; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
49 *state = SDL_POWERSTATE_NO_BATTERY; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
50 return SDL_TRUE; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
51 } |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
52 #endif |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
53 #endif |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
54 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
55 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
56 static SDL_GetPowerInfo_Impl implementations[] = { |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
57 #ifndef SDL_POWER_DISABLED |
3186 | 58 #ifdef SDL_POWER_LINUX /* in order of preference. More than could work. */ |
3174
c8b9c6d27476
Fixed some typos and added a couple of includes. All were need to get SDL_power to compile on Linux.
Bob Pendleton <bob@pendleton.com>
parents:
3173
diff
changeset
|
59 SDL_GetPowerInfo_Linux_proc_acpi, |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
60 SDL_GetPowerInfo_Linux_proc_apm, |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
61 #endif |
3186 | 62 #ifdef SDL_POWER_WINDOWS /* handles Win32, Win64, PocketPC. */ |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
63 SDL_GetPowerInfo_Windows, |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
64 #endif |
4444
42e1092225f9
Implemented SDL power APIs for iPhoneOS.
Ryan C. Gordon <icculus@icculus.org>
parents:
3697
diff
changeset
|
65 #ifdef SDL_POWER_UIKIT /* handles iPhone/iPad/etc */ |
42e1092225f9
Implemented SDL power APIs for iPhoneOS.
Ryan C. Gordon <icculus@icculus.org>
parents:
3697
diff
changeset
|
66 SDL_GetPowerInfo_UIKit, |
42e1092225f9
Implemented SDL power APIs for iPhoneOS.
Ryan C. Gordon <icculus@icculus.org>
parents:
3697
diff
changeset
|
67 #endif |
42e1092225f9
Implemented SDL power APIs for iPhoneOS.
Ryan C. Gordon <icculus@icculus.org>
parents:
3697
diff
changeset
|
68 #ifdef SDL_POWER_MACOSX /* handles Mac OS X, Darwin. */ |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
69 SDL_GetPowerInfo_MacOSX, |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
70 #endif |
3186 | 71 #ifdef SDL_POWER_NINTENDODS /* handles Nintendo DS. */ |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
72 SDL_GetPowerInfo_NintendoDS, |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
73 #endif |
3186 | 74 #ifdef SDL_POWER_BEOS /* handles BeOS, Zeta, with euc.jp apm driver. */ |
3173
510e3f36c04a
BeOS support for power subsystem.
Ryan C. Gordon <icculus@icculus.org>
parents:
3170
diff
changeset
|
75 SDL_GetPowerInfo_BeOS, |
510e3f36c04a
BeOS support for power subsystem.
Ryan C. Gordon <icculus@icculus.org>
parents:
3170
diff
changeset
|
76 #endif |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
77 #ifdef SDL_POWER_HARDWIRED |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
78 SDL_GetPowerInfo_Hardwired, |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
79 #endif |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
80 #endif |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
81 }; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
82 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
83 SDL_PowerState |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
84 SDL_GetPowerInfo(int *seconds, int *percent) |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
85 { |
3186 | 86 const int total = sizeof(implementations) / sizeof(implementations[0]); |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
87 int _seconds, _percent; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
88 SDL_PowerState retval; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
89 int i; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
90 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
91 /* Make these never NULL for platform-specific implementations. */ |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
92 if (seconds == NULL) { |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
93 seconds = &_seconds; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
94 } |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
95 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
96 if (percent == NULL) { |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
97 percent = &_percent; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
98 } |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
99 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
100 for (i = 0; i < total; i++) { |
3186 | 101 if (implementations[i] (&retval, seconds, percent)) { |
3170
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
102 return retval; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
103 } |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
104 } |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
105 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
106 /* nothing was definitive. */ |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
107 *seconds = -1; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
108 *percent = -1; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
109 return SDL_POWERSTATE_UNKNOWN; |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
110 } |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
111 |
b7a48f533966
Initial work on power subsystem for SDL 1.3.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
112 /* vi: set ts=4 sw=4 expandtab: */ |