kc3-lang/angle/src/libANGLE/renderer/gl/RenderbufferGL.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/gl/RenderbufferGL.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.
  //
  
  // RenderbufferGL.cpp: Implements the class methods for RenderbufferGL.
  
  #include "libANGLE/renderer/gl/RenderbufferGL.h"
  
  #include "common/debug.h"
  #include "libANGLE/Caps.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/angletypes.h"
  #include "libANGLE/renderer/gl/BlitGL.h"
  #include "libANGLE/renderer/gl/ContextGL.h"
  #include "libANGLE/renderer/gl/FunctionsGL.h"
  #include "libANGLE/renderer/gl/ImageGL.h"
  #include "libANGLE/renderer/gl/StateManagerGL.h"
  #include "libANGLE/renderer/gl/formatutilsgl.h"
  #include "libANGLE/renderer/gl/renderergl_utils.h"
  
  namespace rx
  {
  RenderbufferGL::RenderbufferGL(const gl::RenderbufferState &state,
                                 const FunctionsGL *functions,
                                 const WorkaroundsGL &workarounds,
                                 StateManagerGL *stateManager,
                                 BlitGL *blitter,
                                 const gl::TextureCapsMap &textureCaps)
      : RenderbufferImpl(state),
        mFunctions(functions),
        mWorkarounds(workarounds),
        mStateManager(stateManager),
        mBlitter(blitter),
        mTextureCaps(textureCaps),
        mRenderbufferID(0)
  {
      mFunctions->genRenderbuffers(1, &mRenderbufferID);
      mStateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  }
  
  RenderbufferGL::~RenderbufferGL()
  {
      mStateManager->deleteRenderbuffer(mRenderbufferID);
      mRenderbufferID = 0;
  }
  
  angle::Result RenderbufferGL::setStorage(const gl::Context *context,
                                           GLenum internalformat,
                                           size_t width,
                                           size_t height)
  {
      mStateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  
      nativegl::RenderbufferFormat renderbufferFormat =
          nativegl::GetRenderbufferFormat(mFunctions, mWorkarounds, internalformat);
      mFunctions->renderbufferStorage(GL_RENDERBUFFER, renderbufferFormat.internalFormat,
                                      static_cast<GLsizei>(width), static_cast<GLsizei>(height));
  
      mNativeInternalFormat = renderbufferFormat.internalFormat;
  
      return angle::Result::Continue;
  }
  
  angle::Result RenderbufferGL::setStorageMultisample(const gl::Context *context,
                                                      size_t samples,
                                                      GLenum internalformat,
                                                      size_t width,
                                                      size_t height)
  {
      mStateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  
      nativegl::RenderbufferFormat renderbufferFormat =
          nativegl::GetRenderbufferFormat(mFunctions, mWorkarounds, internalformat);
      mFunctions->renderbufferStorageMultisample(
          GL_RENDERBUFFER, static_cast<GLsizei>(samples), renderbufferFormat.internalFormat,
          static_cast<GLsizei>(width), static_cast<GLsizei>(height));
  
      const gl::TextureCaps &formatCaps = mTextureCaps.get(internalformat);
      if (samples > formatCaps.getMaxSamples())
      {
          // Before version 4.2, it is unknown if the specific internal format can support the
          // requested number of samples.  It is expected that GL_OUT_OF_MEMORY is returned if the
          // renderbuffer cannot be created.
          GLenum error = GL_NO_ERROR;
          do
          {
              error = mFunctions->getError();
              ANGLE_CHECK_GL_ALLOC(GetImplAs<ContextGL>(context), error != GL_OUT_OF_MEMORY);
              ASSERT(error == GL_NO_ERROR);
          } while (error != GL_NO_ERROR);
      }
  
      mNativeInternalFormat = renderbufferFormat.internalFormat;
  
      return angle::Result::Continue;
  }
  
  angle::Result RenderbufferGL::setStorageEGLImageTarget(const gl::Context *context,
                                                         egl::Image *image)
  {
      ImageGL *imageGL = GetImplAs<ImageGL>(image);
      return imageGL->setRenderbufferStorage(context, this, &mNativeInternalFormat);
  }
  
  GLuint RenderbufferGL::getRenderbufferID() const
  {
      return mRenderbufferID;
  }
  
  angle::Result RenderbufferGL::initializeContents(const gl::Context *context,
                                                   const gl::ImageIndex &imageIndex)
  {
      return mBlitter->clearRenderbuffer(this, mNativeInternalFormat);
  }
  
  GLenum RenderbufferGL::getNativeInternalFormat() const
  {
      return mNativeInternalFormat;
  }
  
  }  // namespace rx
  

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