Add threaded backend to viewer

Bug: skia:
Change-Id: Ibf672921f8a05705e7262aad0b1f3f1e6fc0ef9c
Reviewed-on: https://skia-review.googlesource.com/75382
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Yuqian Li <liyuqian@google.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/tools/viewer/Viewer.h b/tools/viewer/Viewer.h
index 24f68b4964..53b75b2de3 100644
--- a/tools/viewer/Viewer.h
+++ b/tools/viewer/Viewer.h
@@ -13,6 +13,7 @@
 #include "sk_app/Window.h"
 #include "gm.h"
 #include "SkAnimTimer.h"
+#include "SkExecutor.h"
 #include "SkJSONCPP.h"
 #include "SkTouchGesture.h"
 #include "Slide.h"
@@ -59,6 +60,10 @@ private:
     void changeZoomLevel(float delta);
     SkMatrix computeMatrix();
 
+    void resetExecutor() {
+        fExecutor = SkExecutor::MakeFIFOThreadPool(fThreadCnt == 0 ? fTileCnt : fThreadCnt);
+    }
+
     sk_app::Window*        fWindow;
 
     static const int kMeasurementCount = 1 << 6;  // should be power of 2 for fast mod
@@ -112,6 +117,10 @@ private:
     SkTArray<std::function<void(void)>> fDeferredActions;
 
     Json::Value            fAllSlideNames; // cache all slide names for fast updateUIState
+
+    int fTileCnt;
+    int fThreadCnt;
+    std::unique_ptr<SkExecutor> fExecutor;
 };