Add a GPU paths to resource cache of the context

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index dca58745d7d04f46cbc757b156ba7e23ff9dcc05..0ffdb87976f59fb7f08913a410743bd7197d86ae 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -56,6 +56,8 @@ SK_CONF_DECLARE(bool, c_Defer, "gpu.deferContext", true,
 
 static const size_t MAX_TEXTURE_CACHE_COUNT = 2048;
 static const size_t MAX_TEXTURE_CACHE_BYTES = GR_DEFAULT_TEXTURE_CACHE_MB_LIMIT * 1024 * 1024;
+static const size_t MAX_PATH_CACHE_COUNT = 2048;
+static const size_t MAX_PATH_CACHE_BYTES = 1 * 1024 * 1024;
 
 static const size_t DRAW_BUFFER_VBPOOL_BUFFER_SIZE = 1 << 15;
 static const int DRAW_BUFFER_VBPOOL_PREALLOC_BUFFERS = 4;
@@ -111,6 +113,7 @@ GrContext::GrContext() {
     fPathRendererChain = NULL;
     fSoftwarePathRenderer = NULL;
     fTextureCache = NULL;
+    fPathCache = NULL;
     fFontCache = NULL;
     fDrawBuffer = NULL;
     fDrawBufferVBAllocPool = NULL;
@@ -173,6 +176,8 @@ GrContext::~GrContext() {
 
     delete fTextureCache;
     fTextureCache = NULL;
+    delete fPathCache;
+    fPathCache = NULL;
     delete fFontCache;
     delete fDrawBuffer;
     delete fDrawBufferVBAllocPool;
@@ -217,6 +222,10 @@ void GrContext::contextDestroyed() {
     fOvalRenderer->reset();
 
     fTextureCache->purgeAllUnlocked();
+    if (fPathCache) {
+        fPathCache->purgeAllUnlocked();
+    }
+
     fFontCache->freeAll();
     fGpu->markContextDirty();
 }
@@ -234,6 +243,9 @@ void GrContext::freeGpuResources() {
     fOvalRenderer->reset();
 
     fTextureCache->purgeAllUnlocked();
+    if (fPathCache) {
+        fPathCache->purgeAllUnlocked();
+    }
     fFontCache->freeAll();
     // a path renderer may be holding onto resources
     SkSafeSetNull(fPathRendererChain);
@@ -582,6 +594,30 @@ int GrContext::getMaxSampleCount() const {
     return fGpu->caps()->maxSampleCount();
 }
 
+GrPath* GrContext::createPath(const SkPath& inPath, const SkStrokeRec& stroke) {
+    if (!fGpu->caps()->pathRenderingSupport()) {
+        return NULL;
+    }
+
+    if (!fPathCache) {
+        fPathCache = SkNEW_ARGS(GrResourceCache,
+                               (MAX_PATH_CACHE_COUNT,
+                                MAX_PATH_CACHE_BYTES));
+        fPathCache->setOverbudgetCallback(OverbudgetCB, this);
+    }
+
+    GrResourceKey resourceKey = GrPath::ComputeKey(inPath, stroke);
+    GrPath* path = static_cast<GrPath*>(fPathCache->find(resourceKey));
+    if (NULL != path && path->isEqualTo(inPath, stroke)) {
+        path->ref();
+    } else {
+        path = fGpu->createPath(inPath, stroke);
+        fPathCache->purgeAsNeeded(1, path->sizeInBytes());
+        fPathCache->addResource(resourceKey, path);
+    }
+    return path;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 GrTexture* GrContext::wrapBackendTexture(const GrBackendTextureDesc& desc) {
@@ -1776,5 +1812,8 @@ const GrEffectRef* GrContext::createUPMToPMEffect(GrTexture* texture,
 #if GR_CACHE_STATS
 void GrContext::printCacheStats() const {
     fTextureCache->printStats();
+    if (fPathCache) {
+        fPathCache->printStats();
+    }
 }
 #endif