kc3-lang/angle/src/libANGLE/renderer/vulkan/TransformFeedbackVk.h

• Show log

  Commit

• Hash : caa6eccd
  Author :
  Date : 2019-10-27T13:46:56
  

  Vulkan: Implement Transform Feedback support via extension
  
  Implemented transform feedback extension path. Where
  VK_EXT_transform_feedback is supported, extension path will be taken
  over an emulation path. Extension path has advantages in terms of
  performance.
  
  BUG=angleproject:3206
  Test: dEQP-GLES3.functional.transform_feedback.*
        angle_end2end_tests --gtest_filter=TransformFeedbackTest*
  
  Change-Id: Ia07c23afb289d9c67073469a97b714ec96f5265a
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1882767
  Commit-Queue: Mohan Maiya <m.maiya@samsung.com>
  Reviewed-by: Mohan Maiya <m.maiya@samsung.com>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Cody Northrop <cnorthrop@google.com>
  

Download

• src/libANGLE/renderer/vulkan/TransformFeedbackVk.h

• //
  // 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.
  //
  // TransformFeedbackVk.h:
  //    Defines the class interface for TransformFeedbackVk, implementing TransformFeedbackImpl.
  //
  
  #ifndef LIBANGLE_RENDERER_VULKAN_TRANSFORMFEEDBACKVK_H_
  #define LIBANGLE_RENDERER_VULKAN_TRANSFORMFEEDBACKVK_H_
  
  #include "libANGLE/renderer/TransformFeedbackImpl.h"
  #include "libANGLE/renderer/vulkan/vk_helpers.h"
  
  namespace gl
  {
  class ProgramState;
  }  // namespace gl
  
  namespace rx
  {
  namespace vk
  {
  class DescriptorSetLayoutDesc;
  }
  
  // Cached buffer properties for faster descriptor set update and offset calculation.
  struct TransformFeedbackBufferRange
  {
      // Offset as provided by OffsetBindingPointer.
      gl::TransformFeedbackBuffersArray<VkDeviceSize> offsets;
      // Size as provided by OffsetBindingPointer.
      gl::TransformFeedbackBuffersArray<VkDeviceSize> sizes;
      // Aligned offset usable for VkDescriptorBufferInfo.  This value could be smaller than
      // offset.
      gl::TransformFeedbackBuffersArray<VkDeviceSize> alignedOffsets;
  };
  
  class TransformFeedbackVk : public TransformFeedbackImpl
  {
    public:
      TransformFeedbackVk(const gl::TransformFeedbackState &state);
      ~TransformFeedbackVk() override;
      void onDestroy(const gl::Context *context) override;
  
      angle::Result begin(const gl::Context *context, gl::PrimitiveMode primitiveMode) override;
      angle::Result end(const gl::Context *context) override;
      angle::Result pause(const gl::Context *context) override;
      angle::Result resume(const gl::Context *context) override;
  
      angle::Result bindIndexedBuffer(const gl::Context *context,
                                      size_t index,
                                      const gl::OffsetBindingPointer<gl::Buffer> &binding) override;
  
      void updateDescriptorSetLayout(ContextVk *contextVk,
                                     const gl::ProgramState &programState,
                                     vk::DescriptorSetLayoutDesc *descSetLayoutOut) const;
      void addFramebufferDependency(ContextVk *contextVk,
                                    const gl::ProgramState &programState,
                                    vk::FramebufferHelper *framebuffer) const;
      void initDescriptorSet(ContextVk *contextVk,
                             size_t xfbBufferCount,
                             vk::BufferHelper *emptyBuffer,
                             VkDescriptorSet descSet) const;
      void updateDescriptorSet(ContextVk *contextVk,
                               const gl::ProgramState &programState,
                               VkDescriptorSet descSet) const;
      void getBufferOffsets(ContextVk *contextVk,
                            const gl::ProgramState &programState,
                            GLint drawCallFirstVertex,
                            int32_t *offsetsOut,
                            size_t offsetsSize) const;
  
      void unsetTransformFeedbackBufferRebindState() { mRebindTransformFeedbackBuffer = false; }
  
      bool getTransformFeedbackBufferRebindState() const { return mRebindTransformFeedbackBuffer; }
  
      const TransformFeedbackBufferRange &getTransformFeedbackBufferRange() const
      {
          return mTransformFeedbackBufferRange;
      }
  
      const gl::TransformFeedbackBuffersArray<VkBuffer> &getCounterBufferHandles() const
      {
          return mCounterBufferHandles;
      }
  
    private:
      void onTransformFeedbackStateChanged(const gl::Context *context);
      void writeDescriptorSet(ContextVk *contextVk,
                              size_t xfbBufferCount,
                              VkDescriptorBufferInfo *pBufferInfo,
                              VkDescriptorSet descSet) const;
  
      // This member variable is set when glBindTransformFeedbackBuffers/glBeginTransformFeedback
      // is called and unset in dirty bit handler for transform feedback state change. If this
      // value is true, vertex shader will record transform feedback varyings from the beginning
      // of the buffer.
      bool mRebindTransformFeedbackBuffer;
      TransformFeedbackBufferRange mTransformFeedbackBufferRange;
      // Counter buffer used for pause and resume.
      gl::TransformFeedbackBuffersArray<vk::BufferHelper> mCounterBuffer;
      gl::TransformFeedbackBuffersArray<VkBuffer> mCounterBufferHandles;
  };
  
  }  // namespace rx
  
  #endif  // LIBANGLE_RENDERER_VULKAN_TRANSFORMFEEDBACKVK_H_
  

Download