X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=README.markdown;h=9702ba0739294d14c41c8c7eb1264c3491d1391a;hb=b4c584d31d7795428a8a30e353c3f4bc02c5ae5e;hp=4b18e16e9dd94dda1b14d368af4597d3379b67f8;hpb=8ab0d9edc27530b4bc1c3f4f741ce0adacec3caa;p=apitrace

diff --git a/README.markdown b/README.markdown
index 4b18e16..9702ba0 100644
--- a/README.markdown
+++ b/README.markdown
@@ -3,7 +3,7 @@ About **apitrace**
 
 **apitrace** consists of a set of tools to:
 
-* trace OpenGL, OpenGL ES, D3D9, D3D8, D3D7, and DDRAW APIs calls to a file;
+* trace OpenGL, OpenGL ES, Direct3D, and DirectDraw APIs calls to a file;
 
 * retrace OpenGL and OpenGL ES calls from a file;
 
@@ -17,9 +17,9 @@ Obtaining **apitrace**
 
 To obtain apitrace either [download the latest
 binaries](https://github.com/apitrace/apitrace/downloads) for your platform if
-available, or follow the [build instructions](INSTALL.markdown) to build it
-yourself.  On 64bits Linux and Windows platforms you'll need apitrace binaries
-that match the architecture (32bits or 64bits) of the application being traced.
+available, or follow the instructions in INSTALL.markdown to build it yourself.
+On 64bits Linux and Windows platforms you'll need apitrace binaries that match
+the architecture (32bits or 64bits) of the application being traced.
 
 
 Basic usage
@@ -141,6 +141,67 @@ To trace the application inside gdb, invoke gdb as:
 
     gdb --ex 'set exec-wrapper env LD_PRELOAD=/path/to/glxtrace.so' --args /path/to/application
 
+### Android ###
+
+The following instructions should work at least for Android Ice Scream
+Sandwitch:
+
+For standalone applications the instructions above for Linux should
+work. To trace applications started from within the Android VM process
+(app_process aka zygote) you'll have to wrap this process and enable
+tracing dynamically for the application to be traced.
+
+- Wrapping the android main VM process:
+
+  In the Android root /init.rc add the LD_PRELOAD setting to zygote's
+  environment in the 'service zygote' section:
+
+  """
+  service zygote ...
+     setenv LD_PRELOAD /data/egltrace.so
+     ...
+  """
+
+  Note that ICS will overwrite the /init.rc during each boot with the
+  version in the recovery image. So you'll have to change the file in
+  your ICS source tree, rebuild and reflash the device.
+  Rebuilding/reflashing only the recovery image should be sufficient.
+
+
+- Copy egltrace.so to /data
+
+  On the host:
+  $ adb push /path/to/apitrace/build/wrappers/egltrace.so /data
+
+
+- Adjust file permissions to store the trace file:
+
+  By default egltrace.so will store the trace in
+  /data/app_process.trace. For this to work for applications running
+  with a uid other than 0, you have to allow writes to the /data
+  directory on the device:
+
+  # chmod 0777 /data
+
+
+- Enable tracing for a specific process name:
+
+  To trace for example the Settings application:
+  # setprop debug.apitrace.procname com.android.settings
+
+  In general this name will match what 'ps' reports.
+
+
+- Start the application:
+
+  If the application was already running, for example due to ICS's way
+  of pre-starting the apps, you might have to kill the application
+  first:
+
+  # kill <pid of app>
+
+  Launch the application for example from the application menu.
+
 ### Mac OS X ###
 
 Run the application you want to trace as
@@ -358,16 +419,20 @@ reference software renderer.
 
 This can be achieved with retracediff.py script, which invokes glretrace with
 different environments, allowing to choose the desired GL driver by
-manipulating variables such as `LD_LIBRARY_PATH` or `LIBGL_DRIVERS_DIR`.
+manipulating variables such as `LD_LIBRARY_PATH`, `LIBGL_DRIVERS_DIR`, or
+`TRACE_LIBGL`.
 
-For example:
+For example, on Linux:
 
     ./scripts/retracediff.py \
         --ref-env LD_LIBRARY_PATH=/path/to/reference/GL/implementation \
-        -r ./glretrace \
+        --retrace /path/to/glretrace \
         --diff-prefix=/path/to/output/diffs \
         application.trace
 
+Or on Windows:
+
+    python scripts\retracediff.py --retrace \path\to\glretrace.exe --ref-env TRACE_LIBGL=\path\to\reference\opengl32.dll application.trace
 
 
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