Build layer damage bounds for shadows
bug:15538815
Change-Id: I703afeb7e31c28002bd1aff9ce448ec8cdc4e70d
diff --git a/libs/hwui/VertexBuffer.h b/libs/hwui/VertexBuffer.h
index 55d566b..5875f25 100644
--- a/libs/hwui/VertexBuffer.h
+++ b/libs/hwui/VertexBuffer.h
@@ -62,6 +62,8 @@
mVertexCount = vertexCount;
mByteCount = mVertexCount * sizeof(TYPE);
mReallocBuffer = mBuffer = (void*)new TYPE[vertexCount];
+ memset(mBuffer, 0, sizeof(TYPE) * vertexCount);
+
mCleanupMethod = &(cleanup<TYPE>);
return (TYPE*)mBuffer;
@@ -79,6 +81,24 @@
}
}
+ /**
+ * Brute force bounds computation, used only if the producer of this
+ * vertex buffer can't determine bounds more simply/efficiently
+ */
+ template <class TYPE>
+ void computeBounds() {
+ if (!mVertexCount) {
+ mBounds.setEmpty();
+ return;
+ }
+ TYPE* current = (TYPE*)mBuffer;
+ TYPE* end = current + mVertexCount;
+ mBounds.set(current->x, current->y, current->x, current->y);
+ for (; current < end; current++) {
+ mBounds.expandToCoverVertex(current->x, current->y);
+ }
+ }
+
const void* getBuffer() const { return mBuffer; }
const Rect& getBounds() const { return mBounds; }
unsigned int getVertexCount() const { return mVertexCount; }