kc3-lang/angle/src/libANGLE/renderer/null/FramebufferNULL.cpp

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• Hash : 1033d55d
  Author :
  Date : 2020-04-07T14:01:24
  

  Pass binding enum to Framebuffer::syncState.
  
  Will allow us to determine if we're clearing the read or draw FBO. Then
  we can stash clears for the draw FBO only and issue them immediately
  for the read FBO in the Vulkan back-end.
  
  Bug: angleproject:4517
  Change-Id: Ifc043317d6156a75749b13f9d2c44a17e14ee378
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2139997
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Cody Northrop <cnorthrop@google.com>
  Reviewed-by: Tim Van Patten <timvp@google.com>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/null/FramebufferNULL.cpp

• //
  // Copyright 2016 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.
  //
  // FramebufferNULL.cpp:
  //    Implements the class methods for FramebufferNULL.
  //
  
  #include "libANGLE/renderer/null/FramebufferNULL.h"
  
  #include "common/debug.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/formatutils.h"
  #include "libANGLE/renderer/null/BufferNULL.h"
  #include "libANGLE/renderer/null/ContextNULL.h"
  
  namespace rx
  {
  
  FramebufferNULL::FramebufferNULL(const gl::FramebufferState &state) : FramebufferImpl(state) {}
  
  FramebufferNULL::~FramebufferNULL() {}
  
  angle::Result FramebufferNULL::discard(const gl::Context *context,
                                         size_t count,
                                         const GLenum *attachments)
  {
      return angle::Result::Continue;
  }
  
  angle::Result FramebufferNULL::invalidate(const gl::Context *context,
                                            size_t count,
                                            const GLenum *attachments)
  {
      return angle::Result::Continue;
  }
  
  angle::Result FramebufferNULL::invalidateSub(const gl::Context *context,
                                               size_t count,
                                               const GLenum *attachments,
                                               const gl::Rectangle &area)
  {
      return angle::Result::Continue;
  }
  
  angle::Result FramebufferNULL::clear(const gl::Context *context, GLbitfield mask)
  {
      return angle::Result::Continue;
  }
  
  angle::Result FramebufferNULL::clearBufferfv(const gl::Context *context,
                                               GLenum buffer,
                                               GLint drawbuffer,
                                               const GLfloat *values)
  {
      return angle::Result::Continue;
  }
  
  angle::Result FramebufferNULL::clearBufferuiv(const gl::Context *context,
                                                GLenum buffer,
                                                GLint drawbuffer,
                                                const GLuint *values)
  {
      return angle::Result::Continue;
  }
  
  angle::Result FramebufferNULL::clearBufferiv(const gl::Context *context,
                                               GLenum buffer,
                                               GLint drawbuffer,
                                               const GLint *values)
  {
      return angle::Result::Continue;
  }
  
  angle::Result FramebufferNULL::clearBufferfi(const gl::Context *context,
                                               GLenum buffer,
                                               GLint drawbuffer,
                                               GLfloat depth,
                                               GLint stencil)
  {
      return angle::Result::Continue;
  }
  
  angle::Result FramebufferNULL::readPixels(const gl::Context *context,
                                            const gl::Rectangle &origArea,
                                            GLenum format,
                                            GLenum type,
                                            void *ptrOrOffset)
  {
      const gl::PixelPackState &packState = context->getState().getPackState();
      gl::Buffer *packBuffer = context->getState().getTargetBuffer(gl::BufferBinding::PixelPack);
  
      // Get the pointer to write to from the argument or the pack buffer
      GLubyte *pixels = nullptr;
      if (packBuffer != nullptr)
      {
          BufferNULL *packBufferGL = GetImplAs<BufferNULL>(packBuffer);
          pixels                   = reinterpret_cast<GLubyte *>(packBufferGL->getDataPtr());
          pixels += reinterpret_cast<intptr_t>(ptrOrOffset);
      }
      else
      {
          pixels = reinterpret_cast<GLubyte *>(ptrOrOffset);
      }
  
      // Clip read area to framebuffer.
      const gl::Extents fbSize = getState().getReadPixelsAttachment(format)->getSize();
      const gl::Rectangle fbRect(0, 0, fbSize.width, fbSize.height);
      gl::Rectangle area;
      if (!ClipRectangle(origArea, fbRect, &area))
      {
          // nothing to read
          return angle::Result::Continue;
      }
  
      // Compute size of unclipped rows and initial skip
      const gl::InternalFormat &glFormat = gl::GetInternalFormatInfo(format, type);
  
      ContextNULL *contextNull = GetImplAs<ContextNULL>(context);
  
      GLuint rowBytes = 0;
      ANGLE_CHECK_GL_MATH(contextNull,
                          glFormat.computeRowPitch(type, origArea.width, packState.alignment,
                                                   packState.rowLength, &rowBytes));
  
      GLuint skipBytes = 0;
      ANGLE_CHECK_GL_MATH(contextNull,
                          glFormat.computeSkipBytes(type, rowBytes, 0, packState, false, &skipBytes));
      pixels += skipBytes;
  
      // Skip OOB region up to first in bounds pixel
      int leftClip = area.x - origArea.x;
      int topClip  = area.y - origArea.y;
      pixels += leftClip * glFormat.pixelBytes + topClip * rowBytes;
  
      // Write the in-bounds readpixels data with non-zero values
      for (GLint y = area.y; y < area.y + area.height; ++y)
      {
          memset(pixels, 42, glFormat.pixelBytes * area.width);
          pixels += rowBytes;
      }
  
      return angle::Result::Continue;
  }
  
  angle::Result FramebufferNULL::blit(const gl::Context *context,
                                      const gl::Rectangle &sourceArea,
                                      const gl::Rectangle &destArea,
                                      GLbitfield mask,
                                      GLenum filter)
  {
      return angle::Result::Continue;
  }
  
  bool FramebufferNULL::checkStatus(const gl::Context *context) const
  {
      return true;
  }
  
  angle::Result FramebufferNULL::syncState(const gl::Context *context,
                                           GLenum binding,
                                           const gl::Framebuffer::DirtyBits &dirtyBits)
  {
      return angle::Result::Continue;
  }
  
  angle::Result FramebufferNULL::getSamplePosition(const gl::Context *context,
                                                   size_t index,
                                                   GLfloat *xy) const
  {
      return angle::Result::Continue;
  }
  
  }  // namespace rx
  

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