commit 5b3b35296e8b2c8d3f07d32bb645d5414db41a1d
author Romain Guy <romainguy@google.com> Wed Oct 27 18:57:51 2010 -0700
committer Romain Guy <romainguy@google.com> Tue Nov 02 16:17:23 2010 -0700
tree bad2ebdbfeb8a3a0be1591d5a357a8280df7d1d2
parent 2444ddb3d9b59ec45ba50858fcbff639e59b93b1

Optimize FBO drawing with regions.
This optimization is currently disabled until Launcher is
modified to take advantage of it. The optimization can be
enabled by turning on RENDER_LAYERS_AS_REGIONS in the
OpenGLRenderer.h file.

Change-Id: I2fdf59d0f4dc690a3d7f712173ab8db3848b27b1

libs/hwui/Caches.h

diff --git a/libs/hwui/Caches.h b/libs/hwui/Caches.h
index ca22867..c019fd1 100644
--- a/libs/hwui/Caches.h
+++ b/libs/hwui/Caches.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef ANDROID_UI_CACHES_H
-#define ANDROID_UI_CACHES_H
+#ifndef ANDROID_HWUI_CACHES_H
+#define ANDROID_HWUI_CACHES_H
 
 #ifndef LOG_TAG
     #define LOG_TAG "OpenGLRenderer"
@@ -46,6 +46,8 @@
 
 #define REQUIRED_TEXTURE_UNITS_COUNT 3
 
+#define REGION_MESH_QUAD_COUNT 512
+
 // Generates simple and textured vertices
 #define FV(x, y, u, v) { { x, y }, { u, v } }
 
@@ -77,6 +79,7 @@
 
 class Caches: public Singleton<Caches> {
     Caches();
+    ~Caches();
 
     friend class Singleton<Caches>;
 
@@ -84,11 +87,33 @@
 
     GLuint mCurrentBuffer;
 
+    // Used to render layers
+    TextureVertex* mRegionMesh;
+    GLuint mRegionMeshIndices;
+
 public:
+    /**
+     * Binds the VBO used to render simple textured quads.
+     */
     void bindMeshBuffer();
+
+    /**
+     * Binds the specified VBO if needed.
+     */
     void bindMeshBuffer(const GLuint buffer);
+
+    /**
+     * Unbinds the VBO used to render simple textured quads.
+     */
     void unbindMeshBuffer();
 
+    /**
+     * Returns the mesh used to draw regions. Calling this method will
+     * bind a VBO of type GL_ELEMENT_ARRAY_BUFFER that contains the
+     * indices for the region mesh.
+     */
+    TextureVertex* getRegionMesh();
+
     bool blend;
     GLenum lastSrcMode;
     GLenum lastDstMode;
@@ -118,7 +143,6 @@
 }; // class Caches
 
 }; // namespace uirenderer
-
 }; // namespace android
 
-#endif // ANDROID_UI_CACHES_H
+#endif // ANDROID_HWUI_CACHES_H