kc3-lang/angle/src/common/angleutils.cpp

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• Hash : 42975644
  Author :
  Date : 2017-10-12T12:31:51
  

  Move incomplete texture logic to shared helper.
  
  The incomplete texture handling is similar between the D3D and Vulkan
  back-ends. We create 1x1 textures, initialize them to black, and bind
  them when we detect incomplete textures. We would also bind incomplete
  textures when we detect feedback loops. In the GL back-end, we
  wouldn't detect feedback loops, and would allow the driver to handle
  incompleteness.
  
  Instead implement this in a shared helper class, and do the feedback
  loop detection in the front-end for every back-end. This makes our
  behaviour more consistent between back-ends, and prevents undefined
  behaviour.
  
  Because initializing multisample textures is tricky (they
  can't be updated with TexImage calls) we do a bit of a workaround so
  the back-end can clear the incomplete multisample texture initially.
  
  This progresses the initial Vulkan textures implementation.
  
  BUG=angleproject:2167
  
  Change-Id: I79ddcc0711fcc986f2578a52ac6f701231d241ac
  Reviewed-on: https://chromium-review.googlesource.com/700993
  Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/common/angleutils.cpp

• //
  // Copyright (c) 2014 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.
  //
  
  #include "common/angleutils.h"
  #include "common/debug.h"
  
  #include <stdio.h>
  
  #include <limits>
  #include <vector>
  
  namespace angle
  {
  // dirtyPointer is a special value that will make the comparison with any valid pointer fail and
  // force the renderer to re-apply the state.
  const uintptr_t DirtyPointer = std::numeric_limits<uintptr_t>::max();
  }
  
  std::string ArrayString(unsigned int i)
  {
      // We assume that UINT_MAX and GL_INVALID_INDEX are equal.
      ASSERT(i != UINT_MAX);
  
      std::stringstream strstr;
      strstr << "[";
      strstr << i;
      strstr << "]";
      return strstr.str();
  }
  
  std::string ArrayIndexString(const std::vector<unsigned int> &indices)
  {
      std::stringstream strstr;
  
      for (auto indicesIt = indices.rbegin(); indicesIt != indices.rend(); ++indicesIt)
      {
          // We assume that UINT_MAX and GL_INVALID_INDEX are equal.
          ASSERT(*indicesIt != UINT_MAX);
          strstr << "[";
          strstr << (*indicesIt);
          strstr << "]";
      }
  
      return strstr.str();
  }
  
  size_t FormatStringIntoVector(const char *fmt, va_list vararg, std::vector<char>& outBuffer)
  {
      // The state of the va_list passed to vsnprintf is undefined after the call, do a copy in case
      // we need to grow the buffer.
      va_list varargCopy;
      va_copy(varargCopy, vararg);
  
      // Attempt to just print to the current buffer
      int len = vsnprintf(&(outBuffer.front()), outBuffer.size(), fmt, varargCopy);
      va_end(varargCopy);
  
      if (len < 0 || static_cast<size_t>(len) >= outBuffer.size())
      {
          // Buffer was not large enough, calculate the required size and resize the buffer
          len = vsnprintf(nullptr, 0, fmt, vararg);
          outBuffer.resize(len + 1);
  
          // Print again
          va_copy(varargCopy, vararg);
          len = vsnprintf(&(outBuffer.front()), outBuffer.size(), fmt, varargCopy);
          va_end(varargCopy);
      }
      ASSERT(len >= 0);
      return static_cast<size_t>(len);
  }
  

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