commit e5b74c68564baab3639b21a95ce5b4b92949ca27
author joshualitt <joshualitt@chromium.org> Mon Jun 01 14:17:47 2015 -0700
committer Commit bot <commit-bot@chromium.org> Mon Jun 01 14:17:47 2015 -0700
tree 30f00f307c4e97f5c6eb0b9f2fedf1b64a1f0352
parent 933d9863dd4d6d6acdd024d90969110a286e1656

Set GeometryBufferMapThreshold defaults

TBR=bsalomon@google.com
BUG=skia:

Review URL: https://codereview.chromium.org/1161543003

src/gpu/gl/GrGLCaps.cpp

diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index e1ad852..9489e21 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -271,6 +271,12 @@
         }
     }
 
+    // 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) {
+        fGeometryBufferMapThreshold = ctxInfo.isChromium() ? 0 : SK_MaxS32;
+    }
+
     if (kGL_GrGLStandard == standard) {
         SkASSERT(ctxInfo.version() >= GR_GL_VER(2,0) ||
                  ctxInfo.hasExtension("GL_ARB_texture_non_power_of_two"));