kc3-lang/angle/src/libANGLE/Buffer.cpp

• Show log

  Commit

• Hash : b8353b01
  Author :
  Date : 2017-01-25T12:57:21
  

  Vulkan: Simple buffer creation.
  
  This is necessary to initialize vertex arrays.
  
  BUG=angleproject:1579
  
  Change-Id: Ic5a232d5cdfaa75b41241901de842e62ff3b173f
  Reviewed-on: https://chromium-review.googlesource.com/406645
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  

Download

• src/libANGLE/Buffer.cpp

• //
  // Copyright (c) 2002-2014 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.
  //
  
  // Buffer.cpp: Implements the gl::Buffer class, representing storage of vertex and/or
  // index data. Implements GL buffer objects and related functionality.
  // [OpenGL ES 2.0.24] section 2.9 page 21.
  
  #include "libANGLE/Buffer.h"
  
  #include "libANGLE/Context.h"
  #include "libANGLE/renderer/BufferImpl.h"
  #include "libANGLE/renderer/GLImplFactory.h"
  
  namespace gl
  {
  
  BufferState::BufferState()
      : mLabel(),
        mUsage(GL_STATIC_DRAW),
        mSize(0),
        mAccessFlags(0),
        mAccess(GL_WRITE_ONLY_OES),
        mMapped(GL_FALSE),
        mMapPointer(nullptr),
        mMapOffset(0),
        mMapLength(0)
  {
  }
  
  BufferState::~BufferState()
  {
  }
  
  Buffer::Buffer(rx::GLImplFactory *factory, GLuint id)
      : RefCountObject(id), mImpl(factory->createBuffer(mState))
  {
  }
  
  Buffer::~Buffer()
  {
      SafeDelete(mImpl);
  }
  
  void Buffer::setLabel(const std::string &label)
  {
      mState.mLabel = label;
  }
  
  const std::string &Buffer::getLabel() const
  {
      return mState.mLabel;
  }
  
  Error Buffer::bufferData(const Context *context,
                           GLenum target,
                           const void *data,
                           GLsizeiptr size,
                           GLenum usage)
  {
      ANGLE_TRY(mImpl->setData(rx::SafeGetImpl(context), target, data, size, usage));
  
      mIndexRangeCache.clear();
      mState.mUsage = usage;
      mState.mSize  = size;
  
      return NoError();
  }
  
  Error Buffer::bufferSubData(const Context *context,
                              GLenum target,
                              const void *data,
                              GLsizeiptr size,
                              GLintptr offset)
  {
      ANGLE_TRY(mImpl->setSubData(rx::SafeGetImpl(context), target, data, size, offset));
  
      mIndexRangeCache.invalidateRange(static_cast<unsigned int>(offset), static_cast<unsigned int>(size));
  
      return NoError();
  }
  
  Error Buffer::copyBufferSubData(Buffer* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size)
  {
      ANGLE_TRY(mImpl->copySubData(source->getImplementation(), sourceOffset, destOffset, size));
  
      mIndexRangeCache.invalidateRange(static_cast<unsigned int>(destOffset), static_cast<unsigned int>(size));
  
      return NoError();
  }
  
  Error Buffer::map(GLenum access)
  {
      ASSERT(!mState.mMapped);
  
      Error error = mImpl->map(access, &mState.mMapPointer);
      if (error.isError())
      {
          mState.mMapPointer = nullptr;
          return error;
      }
  
      ASSERT(access == GL_WRITE_ONLY_OES);
  
      mState.mMapped      = GL_TRUE;
      mState.mMapOffset   = 0;
      mState.mMapLength   = mState.mSize;
      mState.mAccess      = access;
      mState.mAccessFlags = GL_MAP_WRITE_BIT;
      mIndexRangeCache.clear();
  
      return error;
  }
  
  Error Buffer::mapRange(GLintptr offset, GLsizeiptr length, GLbitfield access)
  {
      ASSERT(!mState.mMapped);
      ASSERT(offset + length <= mState.mSize);
  
      Error error = mImpl->mapRange(offset, length, access, &mState.mMapPointer);
      if (error.isError())
      {
          mState.mMapPointer = nullptr;
          return error;
      }
  
      mState.mMapped      = GL_TRUE;
      mState.mMapOffset   = static_cast<GLint64>(offset);
      mState.mMapLength   = static_cast<GLint64>(length);
      mState.mAccess      = GL_WRITE_ONLY_OES;
      mState.mAccessFlags = access;
  
      // The OES_mapbuffer extension states that GL_WRITE_ONLY_OES is the only valid
      // value for GL_BUFFER_ACCESS_OES because it was written against ES2.  Since there is
      // no update for ES3 and the GL_READ_ONLY and GL_READ_WRITE enums don't exist for ES,
      // we cannot properly set GL_BUFFER_ACCESS_OES when glMapBufferRange is called.
  
      if ((access & GL_MAP_WRITE_BIT) > 0)
      {
          mIndexRangeCache.invalidateRange(static_cast<unsigned int>(offset), static_cast<unsigned int>(length));
      }
  
      return error;
  }
  
  Error Buffer::unmap(GLboolean *result)
  {
      ASSERT(mState.mMapped);
  
      Error error = mImpl->unmap(result);
      if (error.isError())
      {
          *result = GL_FALSE;
          return error;
      }
  
      mState.mMapped      = GL_FALSE;
      mState.mMapPointer  = nullptr;
      mState.mMapOffset   = 0;
      mState.mMapLength   = 0;
      mState.mAccess      = GL_WRITE_ONLY_OES;
      mState.mAccessFlags = 0;
  
      return error;
  }
  
  void Buffer::onTransformFeedback()
  {
      mIndexRangeCache.clear();
  }
  
  void Buffer::onPixelUnpack()
  {
      mIndexRangeCache.clear();
  }
  
  Error Buffer::getIndexRange(GLenum type,
                              size_t offset,
                              size_t count,
                              bool primitiveRestartEnabled,
                              IndexRange *outRange) const
  {
      if (mIndexRangeCache.findRange(type, offset, count, primitiveRestartEnabled, outRange))
      {
          return NoError();
      }
  
      ANGLE_TRY(mImpl->getIndexRange(type, offset, count, primitiveRestartEnabled, outRange));
  
      mIndexRangeCache.addRange(type, offset, count, primitiveRestartEnabled, *outRange);
  
      return NoError();
  }
  
  }  // namespace gl
  

Download