kc3-lang/angle/src/libANGLE/renderer/null/BufferNULL.cpp

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• Hash : 7c985f5c
  Author :
  Date : 2018-11-29T18:16:17
  

  Make angle::Result an enum.
  
  This moves away from a class type to a value type. This should improve
  performance when using angle::Result as a return value. Previously the
  generated code would return a pointer instead of a value.
  
  Improves performance in the most targeted microbenchmark by 10%. In
  more realistic scanarios it will have a smaller improvement. Also
  simplifies the class implementation and usage.
  
  Includes some unrelated code generation changes.
  
  Bug: angleproject:2491
  Change-Id: Ifcf86870bf1c00a2f73c39ea6e4f05ca705050aa
  Reviewed-on: https://chromium-review.googlesource.com/c/1356139
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/null/BufferNULL.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.
  //
  // BufferNULL.cpp:
  //    Implements the class methods for BufferNULL.
  //
  
  #include "libANGLE/renderer/null/BufferNULL.h"
  
  #include "common/debug.h"
  #include "common/utilities.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/angletypes.h"
  #include "libANGLE/renderer/null/ContextNULL.h"
  
  namespace rx
  {
  
  BufferNULL::BufferNULL(const gl::BufferState &state, AllocationTrackerNULL *allocationTracker)
      : BufferImpl(state), mAllocationTracker(allocationTracker)
  {
      ASSERT(mAllocationTracker != nullptr);
  }
  
  BufferNULL::~BufferNULL()
  {
      bool memoryReleaseResult = mAllocationTracker->updateMemoryAllocation(mData.size(), 0);
      ASSERT(memoryReleaseResult);
  }
  
  angle::Result BufferNULL::setData(const gl::Context *context,
                                    gl::BufferBinding target,
                                    const void *data,
                                    size_t size,
                                    gl::BufferUsage usage)
  {
      ANGLE_CHECK_GL_ALLOC(GetImplAs<ContextNULL>(context),
                           mAllocationTracker->updateMemoryAllocation(mData.size(), size));
  
      mData.resize(size, 0);
      if (size > 0 && data != nullptr)
      {
          memcpy(mData.data(), data, size);
      }
      return angle::Result::Continue;
  }
  
  angle::Result BufferNULL::setSubData(const gl::Context *context,
                                       gl::BufferBinding target,
                                       const void *data,
                                       size_t size,
                                       size_t offset)
  {
      if (size > 0)
      {
          memcpy(mData.data() + offset, data, size);
      }
      return angle::Result::Continue;
  }
  
  angle::Result BufferNULL::copySubData(const gl::Context *context,
                                        BufferImpl *source,
                                        GLintptr sourceOffset,
                                        GLintptr destOffset,
                                        GLsizeiptr size)
  {
      BufferNULL *sourceNULL = GetAs<BufferNULL>(source);
      if (size > 0)
      {
          memcpy(mData.data() + destOffset, sourceNULL->mData.data() + sourceOffset, size);
      }
      return angle::Result::Continue;
  }
  
  angle::Result BufferNULL::map(const gl::Context *context, GLenum access, void **mapPtr)
  {
      *mapPtr = mData.data();
      return angle::Result::Continue;
  }
  
  angle::Result BufferNULL::mapRange(const gl::Context *context,
                                     size_t offset,
                                     size_t length,
                                     GLbitfield access,
                                     void **mapPtr)
  {
      *mapPtr = mData.data() + offset;
      return angle::Result::Continue;
  }
  
  angle::Result BufferNULL::unmap(const gl::Context *context, GLboolean *result)
  {
      *result = GL_TRUE;
      return angle::Result::Continue;
  }
  
  angle::Result BufferNULL::getIndexRange(const gl::Context *context,
                                          gl::DrawElementsType type,
                                          size_t offset,
                                          size_t count,
                                          bool primitiveRestartEnabled,
                                          gl::IndexRange *outRange)
  {
      *outRange = gl::ComputeIndexRange(type, mData.data() + offset, count, primitiveRestartEnabled);
      return angle::Result::Continue;
  }
  
  uint8_t *BufferNULL::getDataPtr()
  {
      return mData.data();
  }
  
  const uint8_t *BufferNULL::getDataPtr() const
  {
      return mData.data();
  }
  
  }  // namespace rx
  

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