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

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• Author : Geoff Lang
  Date : 2015-05-27 16:12:30
  Hash : fd216c41
  Message : Support BGRA texture by remapping the internal format to RGBA. The format is still passed as BGRA to the driver so that the data can be properly unpacked. BUG=angleproject:884 Change-Id: I767626c818ce1a3c5a4739f07aa623bf8a9ae377 Reviewed-on: https://chromium-review.googlesource.com/273162 Reviewed-by: Brandon Jones <bajones@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>

• 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/angletypes.h"
  #include "libANGLE/renderer/gl/FunctionsGL.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 FunctionsGL *functions, StateManagerGL *stateManager, const gl::TextureCapsMap &textureCaps)
      : RenderbufferImpl(),
        mFunctions(functions),
        mStateManager(stateManager),
        mTextureCaps(textureCaps),
        mRenderbufferID(0)
  {
      mFunctions->genRenderbuffers(1, &mRenderbufferID);
      mStateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  }
  
  RenderbufferGL::~RenderbufferGL()
  {
      mStateManager->deleteRenderbuffer(mRenderbufferID);
      mRenderbufferID = 0;
  }
  
  gl::Error RenderbufferGL::setStorage(GLenum internalformat, size_t width, size_t height)
  {
      mStateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  
      const nativegl::InternalFormat &nativeInternalFormatInfo = nativegl::GetInternalFormatInfo(internalformat, mFunctions->standard);
      mFunctions->renderbufferStorage(GL_RENDERBUFFER, nativeInternalFormatInfo.internalFormat, width, height);
  
      return gl::Error(GL_NO_ERROR);
  }
  
  gl::Error RenderbufferGL::setStorageMultisample(size_t samples, GLenum internalformat, size_t width, size_t height)
  {
      mStateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  
      const nativegl::InternalFormat &nativeInternalFormatInfo = nativegl::GetInternalFormatInfo(internalformat, mFunctions->standard);
      mFunctions->renderbufferStorageMultisample(GL_RENDERBUFFER, samples, nativeInternalFormatInfo.internalFormat, width, 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();
              if (error == GL_OUT_OF_MEMORY)
              {
                  return gl::Error(GL_OUT_OF_MEMORY);
              }
  
              ASSERT(error == GL_NO_ERROR);
          } while (error != GL_NO_ERROR);
      }
  
      return gl::Error(GL_NO_ERROR);
  }
  
  GLuint RenderbufferGL::getRenderbufferID() const
  {
      return mRenderbufferID;
  }
  
  }