Shrink GrDrawOpAtlases when no longer needed

Bug: skia:3550
Change-Id: I7b09aa2b0fd22ed99694f32f9f395392ef80e238
Reviewed-on: https://skia-review.googlesource.com/49901
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

2 files changed, 15 insertions, 1 deletions

diff --git a/src/gpu/ops/GrDrawOp.h b/src/gpu/ops/GrDrawOp.h
index 145d2e2981..ecd92498ae 100644
--- a/src/gpu/ops/GrDrawOp.h
+++ b/src/gpu/ops/GrDrawOp.h
@@ -33,6 +33,10 @@ public:
         return fSequenceNumber == that.fSequenceNumber;
     }
     bool operator!=(const GrDrawOpUploadToken& that) const { return !(*this == that); }
+    bool inInterval(const GrDrawOpUploadToken& start, const GrDrawOpUploadToken& finish) {
+        return fSequenceNumber >= start.fSequenceNumber &&
+               fSequenceNumber <= finish.fSequenceNumber;
+    }
 
 private:
     GrDrawOpUploadToken();
diff --git a/src/gpu/ops/GrSmallPathRenderer.h b/src/gpu/ops/GrSmallPathRenderer.h
index b958baa843..9c3104b136 100644
--- a/src/gpu/ops/GrSmallPathRenderer.h
+++ b/src/gpu/ops/GrSmallPathRenderer.h
@@ -9,6 +9,7 @@
 #define GrSmallPathRenderer_DEFINED
 
 #include "GrDrawOpAtlas.h"
+#include "GrOnFlushResourceProvider.h"
 #include "GrPathRenderer.h"
 #include "GrRect.h"
 #include "GrShape.h"
@@ -18,7 +19,7 @@
 
 class GrContext;
 
-class GrSmallPathRenderer : public GrPathRenderer {
+class GrSmallPathRenderer : public GrPathRenderer, public GrOnFlushCallbackObject {
 public:
     GrSmallPathRenderer();
     ~GrSmallPathRenderer() override;
@@ -26,6 +27,15 @@ public:
     class SmallPathOp;
     struct PathTestStruct;
 
+    void preFlush(GrOnFlushResourceProvider*, const uint32_t*, int,
+                  SkTArray<sk_sp<GrRenderTargetContext>>*) override {}
+
+    void postFlush(GrDrawOpUploadToken startTokenForNextFlush) override {
+        if (fAtlas) {
+            fAtlas->compact(startTokenForNextFlush);
+        }
+    }
+
 private:
     StencilSupport onGetStencilSupport(const GrShape&) const override {
         return GrPathRenderer::kNoSupport_StencilSupport;