commit a5b02e0b4dfc9947e373e17a383b397f6fcb751c
author Mathias Agopian <mathias@google.com> Fri Sep 04 18:49:03 2009 -0700
committer Mathias Agopian <mathias@google.com> Wed Sep 09 19:20:10 2009 -0700
tree b7c50baab768f61cb535e02fee7351bc650005a3
parent 6ef94ce674107a7759256bac3163c57d3722996f

add a debug property to disable h/w composition. debug.sf.hw, when set to 0 will disable h/w composition

libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp

diff --git a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
index 651e7cf..d893f0a 100644
--- a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
+++ b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
@@ -103,10 +103,22 @@
     }
 
     // initialize EGL
-    const EGLint attribs[] = {
+    EGLint attribs[] = {
             EGL_SURFACE_TYPE,   EGL_WINDOW_BIT,
+            EGL_NONE,           0,
             EGL_NONE
     };
+
+    // debug: disable h/w rendering
+    char property[PROPERTY_VALUE_MAX];
+    if (property_get("debug.sf.hw", property, NULL) > 0) {
+        if (atoi(property) == 0) {
+            LOGW("H/W composition disabled");
+            attribs[2] = EGL_CONFIG_CAVEAT;
+            attribs[3] = EGL_SLOW_CONFIG;
+        }
+    }
+
     EGLint w, h, dummy;
     EGLint numConfigs=0;
     EGLSurface surface;
@@ -193,7 +205,6 @@
     mDpiY = mNativeWindow->ydpi;
     mRefreshRate = fbDev->fps; 
     
-    char property[PROPERTY_VALUE_MAX];
     /* Read density from build-specific ro.sf.lcd_density property
      * except if it is overridden by qemu.sf.lcd_density.
      */