Add flag to avoid stencil buffers in Skia

Certain systems experience a leak in the GL driver associated with
stencil buffers. Attempts to avoid the leak (while still using stencil
buffers) dind't succeed. This patch adds a GrContextOption
fAvoidStencilBuffers. This disables certain path rendering modes, as
well as stencil based masking/clipping.

Bug: 713854
Change-Id: Ifa6c0f2bd5ee395547bda9165d6c79d197ae8b8b
Reviewed-on: https://skia-review.googlesource.com/15253
Commit-Queue: Eric Karl <ericrk@chromium.org>
Reviewed-by: Eric Karl <ericrk@chromium.org>
Reviewed-by: Brian Salomon <bsalomon@google.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gpu/GrCaps.cpp b/src/gpu/GrCaps.cpp
index 57ab5fdece..4acf90ea13 100644
--- a/src/gpu/GrCaps.cpp
+++ b/src/gpu/GrCaps.cpp
@@ -77,6 +77,7 @@ GrCaps::GrCaps(const GrContextOptions& options) {
     fUseDrawInsteadOfPartialRenderTargetWrite = options.fUseDrawInsteadOfPartialRenderTargetWrite;
     fUseDrawInsteadOfAllRenderTargetWrites = false;
     fAvoidInstancedDrawsToFPTargets = false;
+    fAvoidStencilBuffers = false;
 
     fPreferVRAMUseOverFlushes = true;
 }
@@ -95,6 +96,7 @@ void GrCaps::applyOptionsOverrides(const GrContextOptions& options) {
                  GrWindowRectangles::kMaxWindows, fMaxWindowRectangles);
         fMaxWindowRectangles = GrWindowRectangles::kMaxWindows;
     }
+    fAvoidStencilBuffers = options.fAvoidStencilBuffers;
 }
 
 static SkString map_flags_to_string(uint32_t flags) {