kc3-lang/angle/src/libANGLE/Context.inl.h

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• Hash : 796df76c
  Author :
  Date : 2020-06-25T11:49:12
  

  MultiDraw Refactor
  
  Refactor MultiDraw* from general Context to different ContextImpl.
  Move general multiDraw code to renderer_utils.cpp.
  
  Bug: angleproject:3402
  Change-Id: I85cb4b781afa2b3a8beb382a9c735910057f2ebe
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2268580
  Commit-Queue: Shrek Shao <shrekshao@google.com>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/Context.inl.h

• //
  // Copyright 2018 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.
  //
  
  // Context.inl.h: Defines inline functions of gl::Context class
  // Has to be included after libANGLE/Context.h when using one
  // of the defined functions
  
  #ifndef LIBANGLE_CONTEXT_INL_H_
  #define LIBANGLE_CONTEXT_INL_H_
  
  #include "libANGLE/GLES1Renderer.h"
  #include "libANGLE/renderer/ContextImpl.h"
  
  #define ANGLE_HANDLE_ERR(X) \
      (void)(X);              \
      return;
  #define ANGLE_CONTEXT_TRY(EXPR) ANGLE_TRY_TEMPLATE(EXPR, ANGLE_HANDLE_ERR)
  
  namespace gl
  {
  constexpr angle::PackedEnumMap<PrimitiveMode, GLsizei> kMinimumPrimitiveCounts = {{
      {PrimitiveMode::Points, 1},
      {PrimitiveMode::Lines, 2},
      {PrimitiveMode::LineLoop, 2},
      {PrimitiveMode::LineStrip, 2},
      {PrimitiveMode::Triangles, 3},
      {PrimitiveMode::TriangleStrip, 3},
      {PrimitiveMode::TriangleFan, 3},
      {PrimitiveMode::LinesAdjacency, 2},
      {PrimitiveMode::LineStripAdjacency, 2},
      {PrimitiveMode::TrianglesAdjacency, 3},
      {PrimitiveMode::TriangleStripAdjacency, 3},
  }};
  
  ANGLE_INLINE void MarkTransformFeedbackBufferUsage(const Context *context,
                                                     GLsizei count,
                                                     GLsizei instanceCount)
  {
      if (context->getStateCache().isTransformFeedbackActiveUnpaused())
      {
          TransformFeedback *transformFeedback = context->getState().getCurrentTransformFeedback();
          transformFeedback->onVerticesDrawn(context, count, instanceCount);
      }
  }
  
  ANGLE_INLINE void MarkShaderStorageBufferUsage(const Context *context)
  {
      for (size_t index : context->getStateCache().getActiveShaderStorageBufferIndices())
      {
          gl::Buffer *buffer = context->getState().getIndexedShaderStorageBuffer(index).get();
          if (buffer)
          {
              buffer->onDataChanged();
          }
      }
  }
  
  // Return true if the draw is a no-op, else return false.
  //  If there is no active program for the vertex or fragment shader stages, the results of vertex
  //  and fragment shader execution will respectively be undefined. However, this is not
  //  an error. ANGLE will treat this as a no-op.
  //  A no-op draw occurs if the count of vertices is less than the minimum required to
  //  have a valid primitive for this mode (0 for points, 0-1 for lines, 0-2 for tris).
  ANGLE_INLINE bool Context::noopDraw(PrimitiveMode mode, GLsizei count) const
  {
      if (!mStateCache.getCanDraw())
      {
          return true;
      }
  
      return count < kMinimumPrimitiveCounts[mode];
  }
  
  ANGLE_INLINE angle::Result Context::syncDirtyBits()
  {
      const State::DirtyBits &dirtyBits = mState.getDirtyBits();
      ANGLE_TRY(mImplementation->syncState(this, dirtyBits, mAllDirtyBits));
      mState.clearDirtyBits();
      return angle::Result::Continue;
  }
  
  ANGLE_INLINE angle::Result Context::syncDirtyBits(const State::DirtyBits &bitMask)
  {
      const State::DirtyBits &dirtyBits = (mState.getDirtyBits() & bitMask);
      ANGLE_TRY(mImplementation->syncState(this, dirtyBits, bitMask));
      mState.clearDirtyBits(dirtyBits);
      return angle::Result::Continue;
  }
  
  ANGLE_INLINE angle::Result Context::syncDirtyObjects(const State::DirtyObjects &objectMask)
  {
      return mState.syncDirtyObjects(this, objectMask);
  }
  
  ANGLE_INLINE angle::Result Context::prepareForDraw(PrimitiveMode mode)
  {
      if (mGLES1Renderer)
      {
          ANGLE_TRY(mGLES1Renderer->prepareForDraw(mode, this, &mState));
      }
  
      ANGLE_TRY(syncDirtyObjects(mDrawDirtyObjects));
      ASSERT(!isRobustResourceInitEnabled() ||
             !mState.getDrawFramebuffer()->hasResourceThatNeedsInit());
      return syncDirtyBits();
  }
  
  ANGLE_INLINE void Context::drawArrays(PrimitiveMode mode, GLint first, GLsizei count)
  {
      // No-op if count draws no primitives for given mode
      if (noopDraw(mode, count))
      {
          return;
      }
  
      ANGLE_CONTEXT_TRY(prepareForDraw(mode));
      ANGLE_CONTEXT_TRY(mImplementation->drawArrays(this, mode, first, count));
      MarkTransformFeedbackBufferUsage(this, count, 1);
  }
  
  ANGLE_INLINE void Context::drawElements(PrimitiveMode mode,
                                          GLsizei count,
                                          DrawElementsType type,
                                          const void *indices)
  {
      // No-op if count draws no primitives for given mode
      if (noopDraw(mode, count))
      {
          return;
      }
  
      ANGLE_CONTEXT_TRY(prepareForDraw(mode));
      ANGLE_CONTEXT_TRY(mImplementation->drawElements(this, mode, count, type, indices));
  }
  
  ANGLE_INLINE void StateCache::onBufferBindingChange(Context *context)
  {
      updateBasicDrawStatesError();
      updateBasicDrawElementsError();
  }
  
  ANGLE_INLINE void Context::bindBuffer(BufferBinding target, BufferID buffer)
  {
      Buffer *bufferObject =
          mState.mBufferManager->checkBufferAllocation(mImplementation.get(), buffer);
      mState.setBufferBinding(this, target, bufferObject);
      mStateCache.onBufferBindingChange(this);
  }
  
  }  // namespace gl
  
  #endif  // LIBANGLE_CONTEXT_INL_H_
  

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