commit 88c7b988ba7792e51e741567426069cd9cc852dd
author bsalomon <bsalomon@google.com> Fri Jul 31 11:20:16 2015 -0700
committer Commit bot <commit-bot@chromium.org> Fri Jul 31 11:20:16 2015 -0700
tree 1922d71e7d95b8d53ad49163d4fcdd5e725bedfc
parent 7eb0945af254d376df11475150d184623104cf93

Make ANGLE perf decisions be runtime rather than compile time

R=robertphillips@google.com

Review URL: https://codereview.chromium.org/1268953002

src/gpu/gl/GrGLCaps.cpp

diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index 2b19f13..a4a5b68 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -50,6 +50,8 @@
     fFullClearIsFree = false;
     fBindFragDataLocationSupport = false;
     fSRGBWriteControl = false;
+    fRGBA8888PixelsOpsAreSlow = false;
+    fPartialFBOReadIsSlow = false;
 
     fReadPixelsSupportedCache.reset();
 
@@ -304,6 +306,17 @@
         }
     }
 
+#ifdef SK_BUILD_FOR_WIN
+    // We're assuming that on Windows Chromium we're using ANGLE.
+    bool isANGLE = kANGLE_GrGLDriver == ctxInfo.driver() ||
+                   kChromium_GrGLDriver == ctxInfo.driver();
+    // Angle has slow read/write pixel paths for 32bit RGBA (but fast for BGRA). 
+    fRGBA8888PixelsOpsAreSlow = isANGLE;
+    // On DX9 ANGLE reading a partial FBO is slow. TODO: Check whether this is still true and
+    // check DX11 ANGLE.
+    fPartialFBOReadIsSlow = isANGLE;
+#endif
+
     /**************************************************************************
     * GrShaderCaps fields
     **************************************************************************/
@@ -1132,6 +1145,8 @@
              (fUseNonVBOVertexAndIndexDynamicData ? "YES" : "NO"));
     r.appendf("Full screen clear is free: %s\n", (fFullClearIsFree ? "YES" : "NO"));
     r.appendf("SRGB write contol: %s\n", (fSRGBWriteControl ? "YES" : "NO"));
+    r.appendf("RGBA 8888 pixel ops are slow: %s\n", (fRGBA8888PixelsOpsAreSlow? "YES" : "NO"));
+    r.appendf("Partial FBO read is slow: %s\n", (fPartialFBOReadIsSlow? "YES" : "NO"));
     return r;
 }