From 6c321b272c52a77db99d893a63fd06d483ca3bec Mon Sep 17 00:00:00 2001
From: Rajulu Ponnada <rajulu@codeaurora.org>
Date: Thu, 13 Sep 2012 15:19:05 -0700
Subject: [PATCH] hardware/qcom/display: avoiding tile rendering when render
 target changes for the same fbo

tile rendering avoided when switching between same FBOs

Change-Id: I66e3008652470f5cabd26585ece8ef7a783fd0c2
---
 libtilerenderer/tilerenderer.cpp | 12 ++++++------
 libtilerenderer/tilerenderer.h   |  6 +++---
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/libtilerenderer/tilerenderer.cpp b/libtilerenderer/tilerenderer.cpp
index 7ecd055..710fe75 100644
--- a/libtilerenderer/tilerenderer.cpp
+++ b/libtilerenderer/tilerenderer.cpp
@@ -247,11 +247,11 @@ void TileRenderer::endTileRendering() {
 #endif
 }
 
-void TileRenderer::startTiling(int fbo, int left, int top,
+void TileRenderer::startTiling(int fbo, int prevfbo, int left, int top,
                                int right, int bottom,
                                int width, int height, bool preserve) {
 #ifdef QCOM_APP_TILE_RENDER
-    if (!isReady() || isTiled())
+    if ((fbo == prevfbo) || !isReady() || isTiled())
         return;
 
     mTileCacheMgr.set(fbo, left, top, right, bottom, width, height);
@@ -267,13 +267,13 @@ void TileRenderer::startTiling(int fbo, int left, int top,
     return;
 }
 
-void TileRenderer::startTiling(int fbo, bool preserve) {
+void TileRenderer::startTiling(int fbo, int prevfbo, bool preserve) {
 #ifdef QCOM_APP_TILE_RENDER
     int left, top;
     int right, bottom;
     int width, height;
 
-    if (!isReady() || isTiled())
+    if ((fbo == prevfbo) || !isReady() || isTiled())
         return;
 
     mTileCacheMgr.peek(fbo, left, top, right, bottom, width, height);
@@ -287,9 +287,9 @@ void TileRenderer::startTiling(int fbo, bool preserve) {
     return;
 }
 
-void TileRenderer::endTiling(int fbo, bool bClear) {
+void TileRenderer::endTiling(int fbo, int nextfbo, bool bClear) {
 #ifdef QCOM_APP_TILE_RENDER
-    if (!isTiled()) {
+    if ((fbo == nextfbo) || !isTiled()) {
         return;
     }
     TILE_RENDERER_LOGD("TileRenderer::end fbo=%d", fbo);
diff --git a/libtilerenderer/tilerenderer.h b/libtilerenderer/tilerenderer.h
index 307bdfe..679508d 100644
--- a/libtilerenderer/tilerenderer.h
+++ b/libtilerenderer/tilerenderer.h
@@ -99,12 +99,12 @@ public:
 
     void startTileRendering(int left, int top, int right,
                             int bottom, int width, int height);
-    void startTiling(int fbo, int left = 0, int top = 0, int right = 0,
+    void startTiling(int fbo, int prevfbo, int left = 0, int top = 0, int right = 0,
                      int bottom = 0, int width = 0, int height = 0,
                      bool preserve = false);
-    void startTiling(int fbo, bool preserve);
+    void startTiling(int fbo, int prevfbo, bool preserve);
     void endTileRendering();
-    void endTiling(int fbo, bool bClear = false);
+    void endTiling(int fbo, int nextfbo, bool bClear = false);
     void clearCache(int fbo);
 private:
     int startTilingInternal(int left, int top, int right,