Purge cached resources on SkImage destruction.

src/image/SkImage.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
+#include "SkBitmapCache.h"
 #include "SkCanvas.h"
 #include "SkData.h"
 #include "SkImageGenerator.h"
 #include "SkImagePriv.h"
 #include "SkImage_Base.h"
 #include "SkNextID.h"
 #include "SkPixelRef.h"
 #include "SkPixelSerializer.h"
 #include "SkReadPixelsRec.h"
 #include "SkString.h"
@@ skipping 184 matching lines @@
         case kRGB_565_SkColorType:
             return true;
         case kAlpha_8_SkColorType:
             return true;
         default:
             break;
     }
     return false;
 }
 
+static SkSurfaceProps copy_or_safe_defaults(const SkSurfaceProps* props) {
+    return props ? *props : SkSurfaceProps(0, kUnknown_SkPixelGeometry);
+}
+
+SkImage_Base::SkImage_Base(int width, int height, uint32_t uniqueID, const SkSurfaceProps* props)
+    : INHERITED(width, height, uniqueID)
+    , fProps(copy_or_safe_defaults(props))
+    , fAddedToCache(false)
+{ }
+
+SkImage_Base::~SkImage_Base() {
+    if (fAddedToCache.load()) {
+        SkNotifyBitmapGenIDIsStale(this->uniqueID());
+    }
+}
+
 bool SkImage_Base::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
                                 int srcX, int srcY) const {
     if (!raster_canvas_supports(dstInfo)) {
         return false;
     }
 
     SkBitmap bm;
     bm.installPixels(dstInfo, dstPixels, dstRowBytes);
     SkCanvas canvas(bm);
 
@@ skipping 125 matching lines @@
 
 SkImage* SkImage::NewFromAdoptedTexture(GrContext*, const GrBackendTextureDesc&, SkAlphaType) {
     return nullptr;
 }
 
 SkImage* SkImage::NewFromTextureCopy(GrContext*, const GrBackendTextureDesc&, SkAlphaType) {
     return nullptr;
 }
 
 #endif