cc/tiles/image_decode_cache_utils.cc

   1 // Copyright 2018 The Chromium Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_TILES_IMAGE_DECODE_CACHE_UTILS_CC_
   6 #define CC_TILES_IMAGE_DECODE_CACHE_UTILS_CC_
   7
   8 #include "cc/tiles/image_decode_cache_utils.h"
   9
  10 #include "base/check.h"
  11 #include "cc/paint/paint_flags.h"
  12 #include "third_party/skia/include/core/SkBitmap.h"
  13 #include "third_party/skia/include/core/SkImageInfo.h"
  14 #include "third_party/skia/include/core/SkPixmap.h"
  15
  16 #if !BUILDFLAG(IS_ANDROID)
  17 #include "base/system/sys_info.h"
  18 #endif
  19
  20 namespace cc {
  21
  22 // static
  23 bool ImageDecodeCacheUtils::ShouldEvictCaches(
  24     base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level) {
  25   switch (memory_pressure_level) {
  26     case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE:
  27     case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE:
  28       return false;
  29     case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL:
  30       return true;
  31   }
  32   NOTREACHED();
  33   return false;
  34 }
  35
  36 // static
  37 size_t ImageDecodeCacheUtils::GetWorkingSetBytesForImageDecode(
  38     bool for_renderer) {
  39   size_t decoded_image_working_set_budget_bytes = 128 * 1024 * 1024;
  40 #if !BUILDFLAG(IS_ANDROID)
  41   if (for_renderer) {
  42     const bool using_low_memory_policy = base::SysInfo::IsLowEndDevice();
  43     // If there's over 4GB of RAM, increase the working set size to 256MB for
  44     // both gpu and software.
  45     const int kImageDecodeMemoryThresholdMB = 4 * 1024;
  46     if (using_low_memory_policy) {
  47       decoded_image_working_set_budget_bytes = 32 * 1024 * 1024;
  48     } else if (base::SysInfo::AmountOfPhysicalMemoryMB() >=
  49                kImageDecodeMemoryThresholdMB) {
  50       decoded_image_working_set_budget_bytes = 256 * 1024 * 1024;
  51     }
  52   }
  53 #endif  // !BUILDFLAG(IS_ANDROID)
  54   return decoded_image_working_set_budget_bytes;
  55 }
  56
  57 }  // namespace cc
  58
  59 #endif  // CC_TILES_IMAGE_DECODE_CACHE_UTILS_CC_