kc3-lang/angle/src/libANGLE/renderer/gl/BufferGL.cpp

• Show log

  Commit

• Hash : 3edfe034
  Author :
  Date : 2015-09-04T16:38:24
  

  Support primitive restart in RendererGL.
  
  Store index ranges in a new struct that tracks how many real indices were
  seen.  Update index caching to key on primitive restart being enabled and
  update index counting functions to skip primitive restart indicies when
  needed.
  
  Passes dEQP-GLES3.functional.primitive_restart.*
  
  Change-Id: Id1e25a5adcdcd4e998836e8ff6679c64be4c3066
  Reviewed-on: https://chromium-review.googlesource.com/297770
  Tryjob-Request: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Tested-by: Geoff Lang <geofflang@chromium.org>
  

Download

• src/libANGLE/renderer/gl/BufferGL.cpp

• //
  // Copyright 2015 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.
  //
  
  // BufferGL.cpp: Implements the class methods for BufferGL.
  
  #include "libANGLE/renderer/gl/BufferGL.h"
  
  #include "common/debug.h"
  #include "common/utilities.h"
  #include "libANGLE/angletypes.h"
  #include "libANGLE/renderer/gl/FunctionsGL.h"
  #include "libANGLE/renderer/gl/StateManagerGL.h"
  
  namespace rx
  {
  
  // Use the GL_COPY_READ_BUFFER binding when two buffers need to be bound simultaneously.
  // GL_ELEMENT_ARRAY_BUFFER is supported on more versions but can modify the state of the currently
  // bound VAO.  Two simultaneous buffer bindings are only needed for glCopyBufferSubData which also
  // adds the GL_COPY_READ_BUFFER binding.
  static const GLenum SourceBufferOperationTarget = GL_COPY_READ_BUFFER;
  
  // Use the GL_ELEMENT_ARRAY_BUFFER binding for most operations since it's available on all
  // supported GL versions and doesn't affect any current state when it changes.
  static const GLenum DestBufferOperationTarget = GL_ARRAY_BUFFER;
  
  BufferGL::BufferGL(const FunctionsGL *functions, StateManagerGL *stateManager)
      : BufferImpl(),
        mIsMapped(false),
        mFunctions(functions),
        mStateManager(stateManager),
        mBufferID(0)
  {
      ASSERT(mFunctions);
      ASSERT(mStateManager);
  
      mFunctions->genBuffers(1, &mBufferID);
  }
  
  BufferGL::~BufferGL()
  {
      mStateManager->deleteBuffer(mBufferID);
      mBufferID = 0;
  }
  
  gl::Error BufferGL::setData(const void* data, size_t size, GLenum usage)
  {
      mStateManager->bindBuffer(DestBufferOperationTarget, mBufferID);
      mFunctions->bufferData(DestBufferOperationTarget, size, data, usage);
      return gl::Error(GL_NO_ERROR);
  }
  
  gl::Error BufferGL::setSubData(const void* data, size_t size, size_t offset)
  {
      mStateManager->bindBuffer(DestBufferOperationTarget, mBufferID);
      mFunctions->bufferSubData(DestBufferOperationTarget, offset, size, data);
      return gl::Error(GL_NO_ERROR);
  }
  
  gl::Error BufferGL::copySubData(BufferImpl* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size)
  {
      BufferGL *sourceGL = GetAs<BufferGL>(source);
  
      mStateManager->bindBuffer(DestBufferOperationTarget, mBufferID);
      mStateManager->bindBuffer(SourceBufferOperationTarget, sourceGL->getBufferID());
  
      mFunctions->copyBufferSubData(SourceBufferOperationTarget, DestBufferOperationTarget, sourceOffset, destOffset, size);
  
      return gl::Error(GL_NO_ERROR);
  }
  
  gl::Error BufferGL::map(GLenum access, GLvoid **mapPtr)
  {
      mStateManager->bindBuffer(DestBufferOperationTarget, mBufferID);
      *mapPtr = mFunctions->mapBuffer(DestBufferOperationTarget, access);
  
      mIsMapped = true;
      return gl::Error(GL_NO_ERROR);
  }
  
  gl::Error BufferGL::mapRange(size_t offset, size_t length, GLbitfield access, GLvoid **mapPtr)
  {
      mStateManager->bindBuffer(DestBufferOperationTarget, mBufferID);
      *mapPtr = mFunctions->mapBufferRange(DestBufferOperationTarget, offset, length, access);
  
      mIsMapped = true;
      return gl::Error(GL_NO_ERROR);
  }
  
  gl::Error BufferGL::unmap(GLboolean *result)
  {
      ASSERT(result);
  
      mStateManager->bindBuffer(DestBufferOperationTarget, mBufferID);
      *result = mFunctions->unmapBuffer(DestBufferOperationTarget);
  
      mIsMapped = false;
      return gl::Error(GL_NO_ERROR);
  }
  
  gl::Error BufferGL::getIndexRange(GLenum type,
                                    size_t offset,
                                    size_t count,
                                    bool primitiveRestartEnabled,
                                    gl::IndexRange *outRange)
  {
      ASSERT(!mIsMapped);
  
      mStateManager->bindBuffer(DestBufferOperationTarget, mBufferID);
      const uint8_t *bufferData = reinterpret_cast<uint8_t*>(mFunctions->mapBuffer(DestBufferOperationTarget, GL_READ_ONLY));
      *outRange = gl::ComputeIndexRange(type, bufferData + offset, count, primitiveRestartEnabled);
      mFunctions->unmapBuffer(DestBufferOperationTarget);
  
      return gl::Error(GL_NO_ERROR);
  }
  
  GLuint BufferGL::getBufferID() const
  {
      return mBufferID;
  }
  
  }
  

Download