kc3-lang/angle/src/libANGLE/renderer/vulkan/SamplerVk.cpp

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• Hash : 6fc0066a
  Author :
  Date : 2020-04-21T17:40:54
  

  Vulkan: Add a sampler cache.
  
  This uses a packed sampler description to re-use samplers for multliple
  VkImages. The samplers will persist for the lifetime of RendererVk. In
  the future we could look at doing cache eviction for large object
  counts.
  
  Reduces the active VkSampler cache in Manhattan from over 1200 to 9.
  Also should reduce the number of VkSamplers used with Chrome.
  
  Bug: angleproject:4491
  Change-Id: Idca00e4ed8cb660a0865281544aaa57cf884bbdb
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2160771
  Reviewed-by: Tim Van Patten <timvp@google.com>
  Reviewed-by: Tobin Ehlis <tobine@google.com>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/vulkan/SamplerVk.cpp

• //
  // Copyright 2016 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // SamplerVk.cpp:
  //    Implements the class methods for SamplerVk.
  //
  
  #include "libANGLE/renderer/vulkan/SamplerVk.h"
  
  #include "common/debug.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/renderer/vulkan/vk_utils.h"
  
  namespace rx
  {
  
  SamplerVk::SamplerVk(const gl::SamplerState &state) : SamplerImpl(state), mSerial{} {}
  
  SamplerVk::~SamplerVk() = default;
  
  void SamplerVk::onDestroy(const gl::Context *context)
  {
      mSampler.reset();
  }
  
  angle::Result SamplerVk::syncState(const gl::Context *context, const bool dirty)
  {
      ContextVk *contextVk = vk::GetImpl(context);
  
      RendererVk *renderer = contextVk->getRenderer();
      if (mSampler.valid())
      {
          if (!dirty)
          {
              return angle::Result::Continue;
          }
          mSampler.reset();
      }
  
      vk::SamplerDesc desc(mState, false);
      ANGLE_TRY(renderer->getSamplerCache().getSampler(contextVk, desc, &mSampler));
  
      // Regenerate the serial on a sampler change.
      mSerial = contextVk->generateTextureSerial();
      return angle::Result::Continue;
  }
  
  }  // namespace rx
  

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