Mercurial > sdl-ios-xcode
view android-project/build.xml @ 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 | 91d0085b7560 |
children |
line wrap: on
line source
<?xml version="1.0" encoding="UTF-8"?> <project name="SDLApp" default="help"> <!-- The local.properties file is created and updated by the 'android' tool. It contains the path to the SDK. It should *NOT* be checked in in Version Control Systems. --> <property file="local.properties" /> <!-- The build.properties file can be created by you and is never touched by the 'android' tool. This is the place to change some of the default property values used by the Ant rules. Here are some properties you may want to change/update: application.package the name of your application package as defined in the manifest. Used by the 'uninstall' rule. source.dir the name of the source directory. Default is 'src'. out.dir the name of the output directory. Default is 'bin'. Properties related to the SDK location or the project target should be updated using the 'android' tool with the 'update' action. This file is an integral part of the build system for your application and should be checked in in Version Control Systems. --> <property file="build.properties" /> <!-- The default.properties file is created and updated by the 'android' tool, as well as ADT. This file is an integral part of the build system for your application and should be checked in in Version Control Systems. --> <property file="default.properties" /> <!-- Custom Android task to deal with the project target, and import the proper rules. This requires ant 1.6.0 or above. --> <path id="android.antlibs"> <pathelement path="${sdk.dir}/tools/lib/anttasks.jar" /> <pathelement path="${sdk.dir}/tools/lib/sdklib.jar" /> <pathelement path="${sdk.dir}/tools/lib/androidprefs.jar" /> <pathelement path="${sdk.dir}/tools/lib/apkbuilder.jar" /> <pathelement path="${sdk.dir}/tools/lib/jarutils.jar" /> </path> <taskdef name="setup" classname="com.android.ant.SetupTask" classpathref="android.antlibs" /> <!-- Execute the Android Setup task that will setup some properties specific to the target, and import the build rules files. The rules file is imported from <SDK>/platforms/<target_platform>/templates/android_rules.xml To customize some build steps for your project: - copy the content of the main node <project> from android_rules.xml - paste it in this build.xml below the <setup /> task. - disable the import by changing the setup task below to <setup import="false" /> This will ensure that the properties are setup correctly but that your customized build steps are used. --> <setup /> </project>