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

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• Author : Geoff Lang
  Date : 2014-11-19 14:20:15
  Hash : 2b5420c0
  Message : Merge libGLESv2 and libEGL classes into libANGLE. BUG=angle:733 Change-Id: Ic491c971411fe82c56cd97c5c8325ac14ec218df Reviewed-on: https://chromium-review.googlesource.com/230830 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>

• 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/renderer/BufferImpl.h"
  #include "libANGLE/renderer/Renderer.h"
  
  namespace gl
  {
  
  Buffer::Buffer(rx::BufferImpl *impl, GLuint id)
      : RefCountObject(id),
        mBuffer(impl),
        mUsage(GL_DYNAMIC_DRAW),
        mSize(0),
        mAccessFlags(0),
        mMapped(GL_FALSE),
        mMapPointer(NULL),
        mMapOffset(0),
        mMapLength(0)
  {
  }
  
  Buffer::~Buffer()
  {
      SafeDelete(mBuffer);
  }
  
  Error Buffer::bufferData(const void *data, GLsizeiptr size, GLenum usage)
  {
      gl::Error error = mBuffer->setData(data, size, usage);
      if (error.isError())
      {
          return error;
      }
  
      mIndexRangeCache.clear();
      mUsage = usage;
      mSize = size;
  
      return error;
  }
  
  Error Buffer::bufferSubData(const void *data, GLsizeiptr size, GLintptr offset)
  {
      gl::Error error = mBuffer->setSubData(data, size, offset);
      if (error.isError())
      {
          return error;
      }
  
      mIndexRangeCache.invalidateRange(offset, size);
  
      return error;
  }
  
  Error Buffer::copyBufferSubData(Buffer* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size)
  {
      gl::Error error = mBuffer->copySubData(source->getImplementation(), sourceOffset, destOffset, size);
      if (error.isError())
      {
          return error;
      }
  
      mIndexRangeCache.invalidateRange(destOffset, size);
  
      return error;
  }
  
  Error Buffer::mapRange(GLintptr offset, GLsizeiptr length, GLbitfield access)
  {
      ASSERT(!mMapped);
      ASSERT(offset + length <= mSize);
  
      Error error = mBuffer->map(offset, length, access, &mMapPointer);
      if (error.isError())
      {
          mMapPointer = NULL;
          return error;
      }
  
      mMapped = GL_TRUE;
      mMapOffset = static_cast<GLint64>(offset);
      mMapLength = static_cast<GLint64>(length);
      mAccessFlags = static_cast<GLint>(access);
  
      if ((access & GL_MAP_WRITE_BIT) > 0)
      {
          mIndexRangeCache.invalidateRange(offset, length);
      }
  
      return error;
  }
  
  Error Buffer::unmap()
  {
      ASSERT(mMapped);
  
      Error error = mBuffer->unmap();
      if (error.isError())
      {
          return error;
      }
  
      mMapped = GL_FALSE;
      mMapPointer = NULL;
      mMapOffset = 0;
      mMapLength = 0;
      mAccessFlags = 0;
  
      return error;
  }
  
  void Buffer::markTransformFeedbackUsage()
  {
      // TODO: Only used by the DX11 backend. Refactor to a more appropriate place.
      mBuffer->markTransformFeedbackUsage();
      mIndexRangeCache.clear();
  }
  
  }