Cause Skia to use a smaller glyph cache on low-end Android

gpu/skia_bindings/grcontext_for_gles2_interface.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/skia_bindings/grcontext_for_gles2_interface.h"
 
 #include <stddef.h>
 #include <string.h>
 #include <utility>
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/sys_info.h"
 #include "base/trace_event/trace_event.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "gpu/skia_bindings/gl_bindings_skia_cmd_buffer.h"
 #include "third_party/skia/include/gpu/GrContext.h"
+#include "third_party/skia/include/gpu/GrContextOptions.h"
 #include "third_party/skia/include/gpu/gl/GrGLInterface.h"
 
 namespace skia_bindings {
 
 GrContextForGLES2Interface::GrContextForGLES2Interface(
     gpu::gles2::GLES2Interface* gl) {
+  // Calculate limits to pass during initialization:
+  // The limit of the number of GPU resources we hold in the GrContext's
+  // GPU cache.
+  static const int kMaxGaneshResourceCacheCount = 16384;
+  // The limit of the bytes allocated toward GPU resources in the GrContext's
+  // GPU cache.
+  static const size_t kMaxLowEndGaneshResourceCacheBytes = 48 * 1024 * 1024;
+  static const size_t kMaxGaneshResourceCacheBytes = 96 * 1024 * 1024;
+  static const size_t kMaxHighEndGaneshResourceCacheBytes = 256 * 1024 * 1024;
+  // Limits for glyph cache textures.
+  static const size_t kMaxDefaultGlyphCacheTextureBytes = 2048 * 1024 * 4;
+  static const size_t kMaxLowEndGlyphCacheTextureBytes = 1024 * 512 * 4;
+  // High-end / low-end memory cutoffs.
+  static const int64_t kHighEndMemoryThreshold = (int64_t)4096 * 1024 * 1024;
+  static const int64_t kLowEndMemoryThreshold = (int64_t)512 * 1024 * 1024;
+
+  size_t max_ganesh_resource_cache_bytes = kMaxGaneshResourceCacheBytes;
+  int max_glyph_cache_texture_bytes = kMaxDefaultGlyphCacheTextureBytes;
+  if (base::SysInfo::AmountOfPhysicalMemory() <= kLowEndMemoryThreshold) {
+    max_ganesh_resource_cache_bytes = kMaxLowEndGaneshResourceCacheBytes;
+    max_glyph_cache_texture_bytes = kMaxLowEndGlyphCacheTextureBytes;
+  } else if (base::SysInfo::AmountOfPhysicalMemory() >=
+             kHighEndMemoryThreshold) {
+    max_ganesh_resource_cache_bytes = kMaxHighEndGaneshResourceCacheBytes;
+  }
+
+  GrContextOptions options;
+  options.fGlyphCacheTextureMaximumBytes = max_glyph_cache_texture_bytes;
   sk_sp<GrGLInterface> interface(
       skia_bindings::CreateGLES2InterfaceBindings(gl));
-  gr_context_ = sk_sp<GrContext>(
-      GrContext::Create(kOpenGL_GrBackend,
-                        // GrContext takes ownership of |interface|.
-                        reinterpret_cast<GrBackendContext>(interface.get())));
+  gr_context_ = sk_sp<GrContext>(GrContext::Create(
+      kOpenGL_GrBackend,
+      // GrContext takes ownership of |interface|.
+      reinterpret_cast<GrBackendContext>(interface.get()), options));
   if (gr_context_) {
-    // The limit of the number of GPU resources we hold in the GrContext's
-    // GPU cache.
-    static const int kMaxGaneshResourceCacheCount = 16384;
-    // The limit of the bytes allocated toward GPU resources in the GrContext's
-    // GPU cache.
-    static const size_t kMaxLowEndGaneshResourceCacheBytes = 48 * 1024 * 1024;
-    static const size_t kMaxGaneshResourceCacheBytes = 96 * 1024 * 1024;
-    static const size_t kMaxHighEndGaneshResourceCacheBytes = 256 * 1024 * 1024;
-    static const int64_t kHighEndMemoryThreshold = (int64_t)4096 * 1024 * 1024;
-    static const int64_t kLowEndMemoryThreshold = (int64_t)512 * 1024 * 1024;
-
-    size_t max_ganesh_resource_cache_bytes = kMaxGaneshResourceCacheBytes;
-    if (base::SysInfo::AmountOfPhysicalMemory() <= kLowEndMemoryThreshold) {
-      max_ganesh_resource_cache_bytes = kMaxLowEndGaneshResourceCacheBytes;
-    } else if (base::SysInfo::AmountOfPhysicalMemory() >=
-               kHighEndMemoryThreshold) {
-      max_ganesh_resource_cache_bytes = kMaxHighEndGaneshResourceCacheBytes;
-    }
-
     gr_context_->setResourceCacheLimits(kMaxGaneshResourceCacheCount,
                                         max_ganesh_resource_cache_bytes);
   }
 }
 
 GrContextForGLES2Interface::~GrContextForGLES2Interface() {
   // At this point the GLES2Interface is going to be destroyed, so have
   // the GrContext clean up and not try to use it anymore.
   if (gr_context_)
     gr_context_->releaseResourcesAndAbandonContext();
@@ skipping 11 matching lines @@
 
 void GrContextForGLES2Interface::FreeGpuResources() {
   if (gr_context_) {
     TRACE_EVENT_INSTANT0("gpu", "GrContext::freeGpuResources",
                          TRACE_EVENT_SCOPE_THREAD);
     gr_context_->freeGpuResources();
   }
 }
 
 }  // namespace skia_bindings