Expose functionality to purge the GPU texture cache while running SampleApp.

Press 'p' to purge the cache.  A summary of the number of bytes of video memory
released is output to the command prompt.
Review URL: https://codereview.appspot.com/5587045

git-svn-id: http://skia.googlecode.com/svn/trunk@3097 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 11 insertions, 0 deletions

diff --git a/samplecode/SampleApp.cpp b/samplecode/SampleApp.cpp
index d3d2aa708a..898bda0be8 100644
--- a/samplecode/SampleApp.cpp
+++ b/samplecode/SampleApp.cpp
@@ -1537,6 +1537,17 @@ bool SampleWindow::onHandleChar(SkUnichar uni) {
                 this->updateTitle();
             }
             return true;
+        case 'p':
+            {
+                GrContext* grContext = this->getGrContext();
+                if (grContext) {
+                    size_t cacheBytes = grContext->getGpuTextureCacheBytes();
+                    grContext->freeGpuResources();
+                    SkDebugf("Purged %d bytes from the GPU resource cache.\n",
+                             cacheBytes);
+                }
+            }
+            return true;
         case 's':
             fScale = !fScale;
             this->inval(NULL);