Cleanup initialization of GrContext.

Update GrContext options and setup the cache sizes to be based on
the size of the display and not the current default value of 255MB.

Test: atest librenderengine_test
Bug: 183391755
Change-Id: I5be8d6fc54c31f0e2d1c44968284ad772866d6ab
diff --git a/libs/renderengine/skia/SkiaGLRenderEngine.cpp b/libs/renderengine/skia/SkiaGLRenderEngine.cpp
index c7001b9..0798562 100644
--- a/libs/renderengine/skia/SkiaGLRenderEngine.cpp
+++ b/libs/renderengine/skia/SkiaGLRenderEngine.cpp
@@ -294,12 +294,13 @@
         mPlaceholderSurface(placeholder),
         mProtectedEGLContext(protectedContext),
         mProtectedPlaceholderSurface(protectedPlaceholder),
+        mDefaultPixelFormat(static_cast<PixelFormat>(args.pixelFormat)),
         mUseColorManagement(args.useColorManagement) {
     sk_sp<const GrGLInterface> glInterface(GrGLCreateNativeInterface());
     LOG_ALWAYS_FATAL_IF(!glInterface.get());
 
     GrContextOptions options;
-    options.fPreferExternalImagesOverES3 = true;
+    options.fDisableDriverCorrectnessWorkarounds = true;
     options.fDisableDistanceFieldPaths = true;
     options.fPersistentCache = &mSkSLCacheMonitor;
     mGrContext = GrDirectContext::MakeGL(glInterface, options);
@@ -1186,6 +1187,27 @@
     return value;
 }
 
+void SkiaGLRenderEngine::onPrimaryDisplaySizeChanged(ui::Size size) {
+    // This cache multiplier was selected based on review of cache sizes relative
+    // to the screen resolution. Looking at the worst case memory needed by blur (~1.5x),
+    // shadows (~1x), and general data structures (e.g. vertex buffers) we selected this as a
+    // conservative default based on that analysis.
+    const float SURFACE_SIZE_MULTIPLIER = 3.5f * bytesPerPixel(mDefaultPixelFormat);
+    const int maxResourceBytes = size.width * size.height * SURFACE_SIZE_MULTIPLIER;
+
+    // start by resizing the current context
+    auto grContext = mInProtectedContext ? mProtectedGrContext : mGrContext;
+    grContext->setResourceCacheLimit(maxResourceBytes);
+
+    // if it is possible to switch contexts then we will resize the other context
+    if (useProtectedContext(!mInProtectedContext)) {
+        grContext = mInProtectedContext ? mProtectedGrContext : mGrContext;
+        grContext->setResourceCacheLimit(maxResourceBytes);
+        // reset back to the initial context that was active when this method was called
+        useProtectedContext(!mInProtectedContext);
+    }
+}
+
 void SkiaGLRenderEngine::dump(std::string& result) {
     const gl::GLExtensions& extensions = gl::GLExtensions::getInstance();