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

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• Hash : f410e81a
  Author :
  Date : 2021-04-20T14:26:54
  

  GL: Implement multisampled_render_to_texture
  
  Bug: angleproject:2894, angleproject:5988
  Change-Id: I17b55f0655d32d9f41cb55a0467b93a00fba751b
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2841084
  Commit-Queue: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@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"
  #include "platform/FeaturesGL.h"
  
  namespace rx
  {
  RenderbufferGL::RenderbufferGL(const gl::RenderbufferState &state, GLuint id)
      : RenderbufferImpl(state), mRenderbufferID(id)
  {}
  
  RenderbufferGL::~RenderbufferGL()
  {
      ASSERT(mRenderbufferID == 0);
  }
  
  void RenderbufferGL::onDestroy(const gl::Context *context)
  {
      StateManagerGL *stateManager = GetStateManagerGL(context);
      stateManager->deleteRenderbuffer(mRenderbufferID);
      mRenderbufferID = 0;
  }
  
  angle::Result RenderbufferGL::setStorage(const gl::Context *context,
                                           GLenum internalformat,
                                           GLsizei width,
                                           GLsizei height)
  {
      const FunctionsGL *functions      = GetFunctionsGL(context);
      StateManagerGL *stateManager      = GetStateManagerGL(context);
      const angle::FeaturesGL &features = GetFeaturesGL(context);
  
      stateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  
      nativegl::RenderbufferFormat renderbufferFormat =
          nativegl::GetRenderbufferFormat(functions, features, internalformat);
      ANGLE_GL_TRY_ALWAYS_CHECK(
          context, functions->renderbufferStorage(GL_RENDERBUFFER, renderbufferFormat.internalFormat,
                                                  width, height));
  
      mNativeInternalFormat = renderbufferFormat.internalFormat;
  
      return angle::Result::Continue;
  }
  
  angle::Result RenderbufferGL::setStorageMultisample(const gl::Context *context,
                                                      GLsizei samples,
                                                      GLenum internalformat,
                                                      GLsizei width,
                                                      GLsizei height,
                                                      gl::MultisamplingMode mode)
  {
      const FunctionsGL *functions      = GetFunctionsGL(context);
      StateManagerGL *stateManager      = GetStateManagerGL(context);
      const angle::FeaturesGL &features = GetFeaturesGL(context);
  
      stateManager->bindRenderbuffer(GL_RENDERBUFFER, mRenderbufferID);
  
      nativegl::RenderbufferFormat renderbufferFormat =
          nativegl::GetRenderbufferFormat(functions, features, internalformat);
      if (mode == gl::MultisamplingMode::Regular)
      {
          ANGLE_GL_TRY_ALWAYS_CHECK(context, functions->renderbufferStorageMultisample(
                                                 GL_RENDERBUFFER, samples,
                                                 renderbufferFormat.internalFormat, width, height));
      }
      else
      {
          ASSERT(mode == gl::MultisamplingMode::MultisampledRenderToTexture);
  
          if (functions->renderbufferStorageMultisampleEXT)
          {
              ANGLE_GL_TRY_ALWAYS_CHECK(
                  context,
                  functions->renderbufferStorageMultisampleEXT(
                      GL_RENDERBUFFER, samples, renderbufferFormat.internalFormat, width, height));
          }
          else
          {
              ASSERT(functions->renderbufferStorageMultisampleIMG);
              ANGLE_GL_TRY_ALWAYS_CHECK(
                  context,
                  functions->renderbufferStorageMultisampleIMG(
                      GL_RENDERBUFFER, samples, renderbufferFormat.internalFormat, width, height));
          }
      }
  
      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)
  {
      BlitGL *blitter = GetBlitGL(context);
      return blitter->clearRenderbuffer(context, this, mNativeInternalFormat);
  }
  
  GLenum RenderbufferGL::getNativeInternalFormat() const
  {
      return mNativeInternalFormat;
  }
  
  }  // namespace rx
  

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