reset shader compilations for stats

src/gpu/gl/GrGLGpuProgramCache.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLGpu.h"
 
 #include "builders/GrGLProgramBuilder.h"
@@ skipping 59 matching lines @@
         SkDebugf("Cache miss %%: %f\n", (fTotalRequests > 0) ?
                                             100.f * fCacheMisses / fTotalRequests :
                                             0.f);
         int cacheHits = fTotalRequests - fCacheMisses;
         SkDebugf("Hash miss %%: %f\n", (cacheHits > 0) ? 100.f * fHashMisses / cacheHits : 0.f);
         SkDebugf("---------------------\n");
     }
 #endif
 }
 
+void GrGLGpu::ProgramCache::reset() {
+    for (int i = 0; i < fCount; ++i) {
+        SkASSERT(fEntries[i]->fProgram.get());
+        fEntries[i]->fProgram->abandon();
+        delete fEntries[i];
+        fEntries[i] = nullptr;
+    }
+    fCount = 0;
+
+    // zero out hash table
+    for (int i = 0; i < 1 << kHashBits; i++) {
+        fHashTable[i] = nullptr;
+    }
+
+    fCurrLRUStamp = 0;
+#ifdef PROGRAM_CACHE_STATS
+    fTotalRequests = 0;
+    fCacheMisses = 0;
+    fHashMisses = 0;
+#endif
+}
+
 void GrGLGpu::ProgramCache::abandon() {
-    for (int i = 0; i < fCount; ++i) {
-        SkASSERT(fEntries[i]->fProgram.get());
-        fEntries[i]->fProgram->abandon();
-        delete fEntries[i];
-    }
-    fCount = 0;
+    this->reset();
 }
 
 int GrGLGpu::ProgramCache::search(const GrProgramDesc& desc) const {
     ProgDescLess less;
     return SkTSearch(fEntries, fCount, desc, sizeof(Entry*), less);
 }
 
 GrGLProgram* GrGLGpu::ProgramCache::refProgram(const DrawArgs& args) {
 #ifdef PROGRAM_CACHE_STATS
     ++fTotalRequests;
@@ skipping 92 matching lines @@
 
     if (SK_MaxU32 == fCurrLRUStamp) {
         // wrap around! just trash our LRU, one time hit.
         for (int i = 0; i < fCount; ++i) {
             fEntries[i]->fLRUStamp = 0;
         }
     }
     ++fCurrLRUStamp;
     return SkRef(entry->fProgram.get());
 }