Merge "opengl: EGL: special case for GLES emulation"
diff --git a/opengl/libs/EGL/Loader.cpp b/opengl/libs/EGL/Loader.cpp
index e94e50e..325193c 100644
--- a/opengl/libs/EGL/Loader.cpp
+++ b/opengl/libs/EGL/Loader.cpp
@@ -23,6 +23,7 @@
#include <limits.h>
#include <cutils/log.h>
+#include <cutils/properties.h>
#include <EGL/egl.h>
@@ -45,6 +46,39 @@
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 @@
{
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