diff --git a/libs/gui/BufferQueue.cpp b/libs/gui/BufferQueue.cpp
index 01d08b70d..ece04944b 100644
--- a/libs/gui/BufferQueue.cpp
+++ b/libs/gui/BufferQueue.cpp
@@ -57,9 +57,12 @@
 #define ST_LOGE(x, ...) ALOGE("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
 
 #define ATRACE_BUFFER_INDEX(index)                                            \
-    char ___traceBuf[1024];                                                   \
-    snprintf(___traceBuf, 1024, "%s: %d", mConsumerName.string(), (index));   \
-    android::ScopedTrace ___bufTracer(ATRACE_TAG, ___traceBuf);
+    if (ATRACE_ENABLED()) {                                                   \
+        char ___traceBuf[1024];                                               \
+        snprintf(___traceBuf, 1024, "%s: %d", mConsumerName.string(),         \
+                (index));                                                     \
+        android::ScopedTrace ___bufTracer(ATRACE_TAG, ___traceBuf);           \
+    }
 
 namespace android {
 
diff --git a/libs/gui/SurfaceTexture.cpp b/libs/gui/SurfaceTexture.cpp
index 0fa9ca1ed..ed1ea4ec5 100644
--- a/libs/gui/SurfaceTexture.cpp
+++ b/libs/gui/SurfaceTexture.cpp
@@ -542,28 +542,16 @@ void SurfaceTexture::computeCurrentTransformMatrix() {
         // decoder, camera, etc.) would simply not use a crop rectangle (or at
         // least not tell the framework about it) so that the GPU can do the
         // correct edge behavior.
-        int xshrink = 0, yshrink = 0;
-        if (mCurrentCrop.left > 0) {
-            tx = float(mCurrentCrop.left + 1) / float(buf->getWidth());
-            xshrink++;
-        } else {
-            tx = 0.0f;
-        }
-        if (mCurrentCrop.right < int32_t(buf->getWidth())) {
-            xshrink++;
-        }
-        if (mCurrentCrop.bottom < int32_t(buf->getHeight())) {
-            ty = (float(buf->getHeight() - mCurrentCrop.bottom) + 1.0f) /
-                    float(buf->getHeight());
-            yshrink++;
-        } else {
-            ty = 0.0f;
-        }
-        if (mCurrentCrop.top > 0) {
-            yshrink++;
-        }
-        sx = float(mCurrentCrop.width() - xshrink) / float(buf->getWidth());
-        sy = float(mCurrentCrop.height() - yshrink) / float(buf->getHeight());
+        const float shrinkAmount = 1.0f; // the amount that each edge is shrunk
+
+        tx = (float(mCurrentCrop.left) + shrinkAmount) /
+                float(buf->getWidth());
+        ty = (float(buf->getHeight() - mCurrentCrop.bottom) +
+                shrinkAmount) / float(buf->getHeight());
+        sx = (float(mCurrentCrop.width()) - (2.0f * shrinkAmount)) /
+                float(buf->getWidth());
+        sy = (float(mCurrentCrop.height()) - (2.0f * shrinkAmount)) /
+                float(buf->getHeight());
     } else {
         tx = 0.0f;
         ty = 0.0f;
diff --git a/libs/gui/tests/SurfaceTextureClient_test.cpp b/libs/gui/tests/SurfaceTextureClient_test.cpp
index aa1f94e65..b576ca573 100644
--- a/libs/gui/tests/SurfaceTextureClient_test.cpp
+++ b/libs/gui/tests/SurfaceTextureClient_test.cpp
@@ -580,13 +580,13 @@ TEST_F(SurfaceTextureClientTest, GetTransformMatrixSucceedsAfterFreeingBuffersWi
 
     // This accounts for the 1 texel shrink for each edge that's included in the
     // transform matrix to avoid texturing outside the crop region.
-    EXPECT_EQ(.5f, mtx[0]);
+    EXPECT_EQ(.375f, mtx[0]);
     EXPECT_EQ(0.f, mtx[1]);
     EXPECT_EQ(0.f, mtx[2]);
     EXPECT_EQ(0.f, mtx[3]);
 
     EXPECT_EQ(0.f, mtx[4]);
-    EXPECT_EQ(-.5f, mtx[5]);
+    EXPECT_EQ(-.375f, mtx[5]);
     EXPECT_EQ(0.f, mtx[6]);
     EXPECT_EQ(0.f, mtx[7]);
 
@@ -595,7 +595,7 @@ TEST_F(SurfaceTextureClientTest, GetTransformMatrixSucceedsAfterFreeingBuffersWi
     EXPECT_EQ(1.f, mtx[10]);
     EXPECT_EQ(0.f, mtx[11]);
 
-    EXPECT_EQ(0.f, mtx[12]);
+    EXPECT_EQ(.125f, mtx[12]);
     EXPECT_EQ(.5f, mtx[13]);
     EXPECT_EQ(0.f, mtx[14]);
     EXPECT_EQ(1.f, mtx[15]);