commit b92d8f7979c29c7c09932578a11b2f8d6eec1d90
author Chet Haase <chet@google.com> Fri Sep 21 08:40:46 2012 -0700
committer Chet Haase <chet@google.com> Sun Sep 23 12:16:02 2012 -0700
tree b82c57bffc1eded3b6fd15d9a80019e3228c7f2d
parent 7b770b0ec4e5a1b7f1b9601433fb35e55658453d

Optimize glyph cache texture uploads

Only upload the changed area of the glyph cache, not the entire
bitmap. Note that we can't do the full-on optimization here of copying a sub-rect
of the bitmap because of GL ES 2 limitations, but we can at least copy the
horizontal stripe containing the dirty rect, which can still be a big
savings over uploading the entire bitmap.

Issue #7158326 Bad framerates on MR1 (Mako, Manta, Prime)

Change-Id: Iab38d53202650f757ead4658cf4287bdad2b3cb9

libs/hwui/font/CacheTexture.cpp

diff --git a/libs/hwui/font/CacheTexture.cpp b/libs/hwui/font/CacheTexture.cpp
index 4a3af12..f653592 100644
--- a/libs/hwui/font/CacheTexture.cpp
+++ b/libs/hwui/font/CacheTexture.cpp
@@ -171,6 +171,9 @@
             }
 
             mDirty = true;
+            const Rect r(*retOriginX - TEXTURE_BORDER_SIZE, *retOriginY - TEXTURE_BORDER_SIZE,
+                    *retOriginX + glyphW, *retOriginY + glyphH);
+            mDirtyRect.unionWith(r);
             mNumGlyphs++;
 
 #if DEBUG_FONT_RENDERER