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/Patch.cpp

diff --git a/libs/hwui/Patch.cpp b/libs/hwui/Patch.cpp
index 3d21431..9b2d476 100644
--- a/libs/hwui/Patch.cpp
+++ b/libs/hwui/Patch.cpp
@@ -34,6 +34,7 @@
     // 2 triangles per patch, 3 vertices per triangle
     verticesCount = ((xCount + 1) * (yCount + 1) - emptyQuads) * 2 * 3;
     mVertices = new TextureVertex[verticesCount];
+    hasEmptyQuads = emptyQuads > 0;
 
     glGenBuffers(1, &meshBuffer);
 }
@@ -51,6 +52,8 @@
         float left, float top, float right, float bottom,
         const int32_t* xDivs, const int32_t* yDivs,
         const uint32_t width, const uint32_t height, const uint32_t colorKey) {
+    if (hasEmptyQuads) quads.clear();
+
     const uint32_t xStretchCount = (width + 1) >> 1;
     const uint32_t yStretchCount = (height + 1) >> 1;
 
@@ -118,7 +121,7 @@
                 mVertices, GL_STATIC_DRAW);
 }
 
-inline void Patch::generateRow(TextureVertex*& vertex, float y1, float y2, float v1, float v2,
+void Patch::generateRow(TextureVertex*& vertex, float y1, float y2, float v1, float v2,
         const int32_t xDivs[], uint32_t xCount, float stretchX, float width, float bitmapWidth,
         uint32_t& quadCount, const uint32_t colorKey) {
     float previousStepX = 0.0f;
@@ -150,12 +153,17 @@
     generateQuad(vertex, x1, y1, width, y2, u1, v1, 1.0f, v2, quadCount, colorKey);
 }
 
-inline void Patch::generateQuad(TextureVertex*& vertex, float x1, float y1, float x2, float y2,
+void Patch::generateQuad(TextureVertex*& vertex, float x1, float y1, float x2, float y2,
             float u1, float v1, float u2, float v2, uint32_t& quadCount, const uint32_t colorKey) {
     if (((colorKey >> quadCount++) & 0x1) == 1) {
         return;
     }
 
+    if (hasEmptyQuads) {
+        Rect bounds(x1, y1, x2, y2);
+        quads.add(bounds);
+    }
+
     // Left triangle
     TextureVertex::set(vertex++, x1, y1, u1, v1);
     TextureVertex::set(vertex++, x2, y1, u2, v1);