am d51ecafa: opengl: Ensure we only load the GLES emulation library when the emulator supports it. (7a5b4f30) · Commits · e / os / android_frameworks_native-old

opengl/libs/EGL/Loader.cpp

+43 −0

Original line number	Diff line number	Diff line
		@@ -23,6 +23,7 @@
		#include <limits.h>

		#include <cutils/log.h>
		#include <cutils/properties.h>

		#include <EGL/egl.h>

		@@ -45,6 +46,39 @@ namespace android {

		ANDROID_SINGLETON_STATIC_INSTANCE( Loader )

		/* This function is called to check whether we run inside the emulator,
		* and if this is the case whether GLES GPU emulation is supported.
		*
		* Returned values are:
		* -1 -> not running inside the emulator
		* 0 -> running inside the emulator, but GPU emulation not supported
		* 1 -> running inside the emulator, GPU emulation is supported
		* through the "emulation" config.
		*/
		static int
		checkGlesEmulationStatus(void)
		{
		/* We're going to check for the following kernel parameters:
		*
		* qemu=1 -> tells us that we run inside the emulator
		* android.qemu.gles=<number> -> tells us the GLES GPU emulation status
		*
		* Note that we will return <number> if we find it. This let us support
		* more additionnal emulation modes in the future.
		*/
		char prop[PROPERTY_VALUE_MAX];
		int result = -1;

		/* First, check for qemu=1 */
		property_get("ro.kernel.qemu",prop,"0");
		if (atoi(prop) != 1)
		return -1;

		/* We are in the emulator, get GPU status value */
		property_get("ro.kernel.qemu.gles",prop,"0");
		return atoi(prop);
		}

		// ----------------------------------------------------------------------------

		Loader::driver_t::driver_t(void* gles)
		@@ -94,6 +128,15 @@ Loader::Loader()
		{
		char line[256];
		char tag[256];

		/* Special case for GLES emulation */
		if (checkGlesEmulationStatus() == 0) {
		LOGD("Emulator without GPU support detected. Fallback to software renderer.");
		gConfig.add( entry_t(0, 0, "android") );
		return;
		}

		/* Otherwise, use egl.cfg */
		FILE* cfg = fopen("/system/lib/egl/egl.cfg", "r");
		if (cfg == NULL) {
		// default config