Turn off buffer mapping in Chromium
BUG=chromium:496224
Review URL: https://codereview.chromium.org/1211363006
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index 22fd053..69580ec 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -377,7 +377,14 @@
// On many GPUs, map memory is very expensive, so we effectively disable it here by setting the
// threshold to the maximum unless the client gives us a hint that map memory is cheap.
if (fGeometryBufferMapThreshold < 0) {
+ // We think mapping on Chromium will be cheaper once we know ahead of time how much space
+ // we will use for all GrBatchs. Right now we might wind up mapping a large buffer and using
+ // a small subset.
+#if 0
fGeometryBufferMapThreshold = kChromium_GrGLDriver == ctxInfo.driver() ? 0 : SK_MaxS32;
+#else
+ fGeometryBufferMapThreshold = SK_MaxS32;
+#endif
}
if (kGL_GrGLStandard == standard) {