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

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• Hash : 81370214
  Author :
  Date : 2020-07-29T12:54:02
  

  Pass the Command when sync'ing dirty objects
  
  A new enum is being created that contains command types, which are then
  passed to each dirty object when they are synced. This allows the
  syncState() methods to perform special handling for each command type.
  
  This change is in preparation for optimizing resolving multisample
  images with glBlit, since the render pass needs to be updated before
  it's ended.
  
  Bug: angleproject:4753
  Change-Id: I77701f79418d35cff689e864c8a8b47b6fca0255
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2327335
  Commit-Queue: Tim Van Patten <timvp@google.com>
  Reviewed-by: Charlie Lao <cclao@google.com>
  Reviewed-by: Shahbaz Youssefi <syoussefi@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,
                                            const gl::PixelPackState &pack,
                                            gl::Buffer *packBuffer,
                                            void *ptrOrOffset)
  {
      // 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, pack.alignment,
                                                                pack.rowLength, &rowBytes));
  
      GLuint skipBytes = 0;
      ANGLE_CHECK_GL_MATH(contextNull,
                          glFormat.computeSkipBytes(type, rowBytes, 0, pack, 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,
                                           gl::Command command)
  {
      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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