ANDROID: Force extra screen update when updating overlay.

This appears to work around a blank screen bug Nexus1.  I never
tracked it down, but as far as I can tell it is triggered by multiple
overlapping updates before flushing the texture to screen.  This
condition only happens in the overlay atm so an extra redraw isn't the
end of the world.

(Also remove an unused _full_screen_dirty property)

svn-id: r53801

1 files changed, 7 insertions, 3 deletions

diff --git a/backends/platform/android/android.cpp b/backends/platform/android/android.cpp
index dcc4e37458..38f387b201 100644
--- a/backends/platform/android/android.cpp
+++ b/backends/platform/android/android.cpp
@@ -109,7 +109,7 @@ static void JNU_ThrowByName(JNIEnv* env, const char* name, const char* msg) {
 	env->DeleteLocalRef(cls);
 }
 
-// floating point.	use sparingly.
+// floating point. use sparingly.
 template <class T>
 static inline T scalef(T in, float numerator, float denominator) {
 	return static_cast<float>(in) * numerator / denominator;
@@ -177,7 +177,6 @@ private:
 	GLESPaletteTexture* _game_texture;
 	int _shake_offset;
 	Common::Rect _focus_rect;
-	bool _full_screen_dirty;
 
 	// Overlay layer
 	GLES4444Texture* _overlay_texture;
@@ -320,7 +319,6 @@ OSystem_Android::OSystem_Android(jobject am)
 	  _fsFactory(new POSIXFilesystemFactory()),
 	  _asset_archive(new AndroidAssetArchive(am)),
 	  _shake_offset(0),
-	  _full_screen_dirty(false),
 	  _event_queue_lock(createMutex()) {
 }
 
@@ -862,6 +860,9 @@ void OSystem_Android::hideOverlay() {
 void OSystem_Android::clearOverlay() {
 	ENTER("clearOverlay()");
 	_overlay_texture->fillBuffer(0);
+
+	// Shouldn't need this, but works around a 'blank screen' bug on Nexus1
+	updateScreen();
 }
 
 void OSystem_Android::grabOverlay(OverlayColor *buf, int pitch) {
@@ -887,6 +888,9 @@ void OSystem_Android::copyRectToOverlay(const OverlayColor *buf, int pitch,
 
 	// This 'pitch' is pixels not bytes
 	_overlay_texture->updateBuffer(x, y, w, h, buf, pitch * sizeof(buf[0]));
+
+	// Shouldn't need this, but works around a 'blank screen' bug on Nexus1?
+	updateScreen();
 }
 
 int16 OSystem_Android::getOverlayHeight() {