kc3-lang/angle/src/libANGLE/renderer/metal/ProvokingVertexHelper.h

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• Hash : 7d712c47
  Author :
  Date : 2022-09-08T09:42:10
  

  Metal: ProvokingVertexHelper stop using a separate cmdbuffer
  
  This simplifies the code. Without this you always need to be
  aware that the provoking vertex helper's command buffer might
  have commands in it that need to be committed before starting
  other operations.
  
  Bug: angleproject:7643
  Change-Id: I1c73d451c12c268ecbdb6a1cd63a77c291949ef9
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3884275
  Commit-Queue: Gregg Tavares <gman@chromium.org>
  Reviewed-by: Kenneth Russell <kbr@chromium.org>
  Reviewed-by: Kyle Piddington <kpiddington@apple.com>
  

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• src/libANGLE/renderer/metal/ProvokingVertexHelper.h

• //
  // Copyright 2021 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.
  //
  // ProvokingVertexHelper.h:
  //    Manages re-writing index buffers when provoking vertex support is needed.
  //    Handles points, lines, triangles, line strips, and triangle strips.
  //    Line loops, and triangle fans should be pre-processed.
  //
  #ifndef LIBANGLE_RENDERER_METAL_PROVOKINGVERTEXHELPER_H
  #define LIBANGLE_RENDERER_METAL_PROVOKINGVERTEXHELPER_H
  
  #include "libANGLE/Context.h"
  #include "libANGLE/renderer/ContextImpl.h"
  #include "libANGLE/renderer/metal/DisplayMtl.h"
  #include "libANGLE/renderer/metal/mtl_buffer_pool.h"
  #include "libANGLE/renderer/metal/mtl_command_buffer.h"
  #include "libANGLE/renderer/metal/mtl_context_device.h"
  #include "libANGLE/renderer/metal/mtl_state_cache.h"
  namespace rx
  {
  class ContextMtl;
  
  class ProvokingVertexHelper : public mtl::ProvokingVertexCacheSpecializeShaderFactory
  {
    public:
      ProvokingVertexHelper(ContextMtl *context);
      mtl::BufferRef preconditionIndexBuffer(ContextMtl *context,
                                             mtl::BufferRef indexBuffer,
                                             size_t indexCount,
                                             size_t indexOffset,
                                             bool primitiveRestartEnabled,
                                             gl::PrimitiveMode primitiveMode,
                                             gl::DrawElementsType elementsType,
                                             size_t &outIndexCount,
                                             size_t &outIndexOffset,
                                             gl::PrimitiveMode &outPrimitiveMode);
  
      mtl::BufferRef generateIndexBuffer(ContextMtl *context,
                                         size_t first,
                                         size_t indexCount,
                                         gl::PrimitiveMode primitiveMode,
                                         gl::DrawElementsType elementsType,
                                         size_t &outIndexCount,
                                         size_t &outIndexOffset,
                                         gl::PrimitiveMode &outPrimitiveMode);
  
      void releaseInFlightBuffers(ContextMtl *contextMtl);
      void ensureCommandBufferReady();
      void onDestroy(ContextMtl *context);
      mtl::ComputeCommandEncoder *getComputeCommandEncoder();
  
    private:
      id<MTLLibrary> mProvokingVertexLibrary;
      mtl::BufferPool mIndexBuffers;
      mtl::ProvokingVertexComputePipelineCache mPipelineCache;
      mtl::ProvokingVertexComputePipelineDesc mCachedDesc;
  
      // Program cache
      virtual angle::Result getSpecializedShader(
          rx::mtl::Context *context,
          gl::ShaderType shaderType,
          const mtl::ProvokingVertexComputePipelineDesc &renderPipelineDesc,
          id<MTLFunction> *shaderOut) override;
      // Private command buffer
      virtual bool hasSpecializedShader(
          gl::ShaderType shaderType,
          const mtl::ProvokingVertexComputePipelineDesc &renderPipelineDesc) override;
  
      void prepareCommandEncoderForDescriptor(ContextMtl *context,
                                              mtl::ComputeCommandEncoder *encoder,
                                              mtl::ProvokingVertexComputePipelineDesc desc);
  };
  }  // namespace rx
  #endif /* LIBANGLE_RENDERER_METAL_PROVOKINGVERTEXHELPER_H */
  

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