kc3-lang/angle/util/Vector.cpp

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• Hash : 9fc3682c
  Author :
  Date : 2015-11-18T13:08:07
  

  D3D: Rework varying packing code.
  
  In D3D we pack varyings by making a register map, and using the
  recommended GLSL ES algorithm to reserve register space. We use
  this map to assign row and column slots to each varying and then
  produce a semantic index value.
  
  The existing scheme had a number of bugs, and was failing several
  angle_end2end_tests. The new design cleans up the code somewhat
  and uses a different counting scheme for the semantic indexes:
  just sort the varyings in packing order and use a simple
  incrementing semantic index per varying. In SM4+, the HLSL compiler
  sorts and packs the varyings correctly itself, and in SM3, handle
  the cases we don't support by returning an error instead of a D3D
  compiler link error.
  
  Also refactor how we store varying information for TF Feedback/
  StreamOut. Only store the necessary D3D information, instead of
  extra information like the name and type.
  
  This fixes several tests in GLSLTest/*. This also will allow us to
  fix interpolation qualifier packing and the structure packing in
  HLSL, which seems to work differently than the rest of the varying
  types.
  
  BUG=angleproject:1202
  TEST=bots,dEQP-GLES3.functional.transform_feedback.*
  
  Change-Id: Ie5bfbb4f71d8bf97f39115fc46d2e61b131df639
  Reviewed-on: https://chromium-review.googlesource.com/311241
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Tested-by: Jamie Madill <jmadill@chromium.org>
  

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• util/Vector.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.
  //
  // Vector:
  //   Vector class for linear math.
  //
  
  #include "Vector.h"
  
  #include <math.h>
  
  Vector2::Vector2() : x(0.0), y(0.0)
  {
  }
  
  Vector2::Vector2(float x, float y) : x(x), y(y)
  {
  }
  
  bool Vector2::operator==(const Vector2 &vec) const
  {
      return x == vec.x && y == vec.y;
  }
  
  bool Vector2::operator!=(const Vector2 &vec) const
  {
      return !(*this == vec);
  }
  
  std::ostream &operator<<(std::ostream &stream, const Vector2 &vec)
  {
      stream << "(" << vec.x << "," << vec.y << ")";
      return stream;
  }
  
  float Vector2::length(const Vector2 &vec)
  {
      float lenSquared = lengthSquared(vec);
      return (lenSquared != 0.0f) ? sqrtf(lenSquared) : 0.0f;
  }
  
  float Vector2::lengthSquared(const Vector2 &vec)
  {
      return vec.x * vec.x + vec.y * vec.y;
  }
  
  Vector2 Vector2::normalize(const Vector2 &vec)
  {
      Vector2 ret(0.0f, 0.0f);
      float len = length(vec);
      if (len != 0.0f)
      {
          float invLen = 1.0f / len;
          ret.x        = vec.x * invLen;
          ret.y        = vec.y * invLen;
      }
      return ret;
  }
  
  Vector3::Vector3() : x(0.0), y(0.0), z(0.0)
  {
  }
  
  Vector3::Vector3(float x, float y, float z) : x(x), y(y), z(z)
  {
  }
  
  float Vector3::length(const Vector3 &vec)
  {
      float lenSquared = lengthSquared(vec);
      return (lenSquared != 0.0f) ? sqrtf(lenSquared) : 0.0f;
  }
  
  float Vector3::lengthSquared(const Vector3 &vec)
  {
      return vec.x * vec.x + vec.y * vec.y + vec.z * vec.z;
  }
  
  Vector3 Vector3::normalize(const Vector3 &vec)
  {
      Vector3 ret(0.0f, 0.0f, 0.0f);
      float len = length(vec);
      if (len != 0.0f)
      {
          float invLen = 1.0f / len;
          ret.x        = vec.x * invLen;
          ret.y        = vec.y * invLen;
          ret.z        = vec.z * invLen;
      }
      return ret;
  }
  
  float Vector3::dot(const Vector3 &a, const Vector3 &b)
  {
      return a.x * b.x + a.y * b.y + a.z * b.z;
  }
  
  Vector3 Vector3::cross(const Vector3 &a, const Vector3 &b)
  {
      return Vector3(a.y * b.z - a.z * b.y, a.z * b.x - a.x * b.z, a.x * b.y - a.y * b.x);
  }
  
  Vector3 operator*(const Vector3 &a, const Vector3 &b)
  {
      return Vector3(a.x * b.x, a.y * b.y, a.z * b.z);
  }
  
  Vector3 operator*(const Vector3 &a, const float &b)
  {
      return Vector3(a.x * b, a.y * b, a.z * b);
  }
  
  Vector3 operator/(const Vector3 &a, const Vector3 &b)
  {
      return Vector3(a.x / b.x, a.y / b.y, a.z / b.z);
  }
  
  Vector3 operator/(const Vector3 &a, const float &b)
  {
      return Vector3(a.x / b, a.y / b, a.z / b);
  }
  
  Vector3 operator+(const Vector3 &a, const Vector3 &b)
  {
      return Vector3(a.x + b.x, a.y + b.y, a.z + b.z);
  }
  
  Vector3 operator-(const Vector3 &a, const Vector3 &b)
  {
      return Vector3(a.x - b.x, a.y - b.y, a.z - b.z);
  }
  
  Vector4::Vector4() : x(0.0f), y(0.0f), z(0.0f), w(0.0f)
  {
  }
  
  Vector4::Vector4(float x, float y, float z, float w) : x(x), y(y), z(z), w(w)
  {
  }
  
  float Vector4::length(const Vector4 &vec)
  {
      float lenSquared = lengthSquared(vec);
      return (lenSquared != 0.0f) ? sqrtf(lenSquared) : 0.0f;
  }
  
  float Vector4::lengthSquared(const Vector4 &vec)
  {
      return vec.x * vec.x + vec.y * vec.y + vec.z * vec.z + vec.w * vec.w;
  }
  
  Vector4 Vector4::normalize(const Vector4 &vec)
  {
      Vector4 ret(0.0f, 0.0f, 0.0f, 1.0f);
      if (vec.w != 0.0f)
      {
          float invLen = 1.0f / vec.w;
          ret.x        = vec.x * invLen;
          ret.y        = vec.y * invLen;
          ret.z        = vec.z * invLen;
      }
      return ret;
  }
  
  float Vector4::dot(const Vector4 &a, const Vector4 &b)
  {
      return a.x * b.x + a.y * b.y + a.z * b.z + a.w * b.w;
  }
  

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