kc3-lang/angle/src/libGLESv2/angletypes.cpp

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• Hash : 1a965480
  Author :
  Date : 2014-09-22T18:00:32
  

  Vertex management functions can take a State reference instead of pointers to attrib data.
  
  BUG=angle:685
  
  Change-Id: I0bfc26c53eb1358a023ac5d4ec20be06f9c90f4a
  Reviewed-on: https://chromium-review.googlesource.com/219352
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Tested-by: Shannon Woods <shannonwoods@chromium.org>
  

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• src/libGLESv2/angletypes.cpp

• //
  // Copyright (c) 2013 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.
  //
  
  // angletypes.h : Defines a variety of structures and enum types that are used throughout libGLESv2
  
  #include "libGLESv2/angletypes.h"
  #include "libGLESv2/ProgramBinary.h"
  #include "libGLESv2/VertexAttribute.h"
  #include "libGLESv2/State.h"
  #include "libGLESv2/VertexArray.h"
  
  namespace gl
  {
  
  SamplerState::SamplerState()
      : minFilter(GL_NEAREST_MIPMAP_LINEAR),
        magFilter(GL_LINEAR),
        wrapS(GL_REPEAT),
        wrapT(GL_REPEAT),
        wrapR(GL_REPEAT),
        maxAnisotropy(1.0f),
        baseLevel(0),
        maxLevel(1000),
        minLod(-1000.0f),
        maxLod(1000.0f),
        compareMode(GL_NONE),
        compareFunc(GL_LEQUAL),
        swizzleRed(GL_RED),
        swizzleGreen(GL_GREEN),
        swizzleBlue(GL_BLUE),
        swizzleAlpha(GL_ALPHA)
  {}
  
  bool SamplerState::swizzleRequired() const
  {
      return swizzleRed != GL_RED || swizzleGreen != GL_GREEN ||
             swizzleBlue != GL_BLUE || swizzleAlpha != GL_ALPHA;
  }
  
  static void MinMax(int a, int b, int *minimum, int *maximum)
  {
      if (a < b)
      {
          *minimum = a;
          *maximum = b;
      }
      else
      {
          *minimum = b;
          *maximum = a;
      }
  }
  
  bool ClipRectangle(const Rectangle &source, const Rectangle &clip, Rectangle *intersection)
  {
      int minSourceX, maxSourceX, minSourceY, maxSourceY;
      MinMax(source.x, source.x + source.width, &minSourceX, &maxSourceX);
      MinMax(source.y, source.y + source.height, &minSourceY, &maxSourceY);
  
      int minClipX, maxClipX, minClipY, maxClipY;
      MinMax(clip.x, clip.x + clip.width, &minClipX, &maxClipX);
      MinMax(clip.y, clip.y + clip.height, &minClipY, &maxClipY);
  
      if (minSourceX >= maxClipX || maxSourceX <= minClipX || minSourceY >= maxClipY || maxSourceY <= minClipY)
      {
          if (intersection)
          {
              intersection->x = minSourceX;
              intersection->y = maxSourceY;
              intersection->width = maxSourceX - minSourceX;
              intersection->height = maxSourceY - minSourceY;
          }
  
          return false;
      }
      else
      {
          if (intersection)
          {
              intersection->x = std::max(minSourceX, minClipX);
              intersection->y = std::max(minSourceY, minClipY);
              intersection->width  = std::min(maxSourceX, maxClipX) - std::max(minSourceX, minClipX);
              intersection->height = std::min(maxSourceY, maxClipY) - std::max(minSourceY, minClipY);
          }
  
          return true;
      }
  }
  
  VertexFormat::VertexFormat()
      : mType(GL_NONE),
        mNormalized(GL_FALSE),
        mComponents(0),
        mPureInteger(false)
  {}
  
  VertexFormat::VertexFormat(GLenum type, GLboolean normalized, GLuint components, bool pureInteger)
      : mType(type),
        mNormalized(normalized),
        mComponents(components),
        mPureInteger(pureInteger)
  {
      // Float data can not be normalized, so ignore the user setting
      if (mType == GL_FLOAT || mType == GL_HALF_FLOAT || mType == GL_FIXED)
      {
          mNormalized = GL_FALSE;
      }
  }
  
  VertexFormat::VertexFormat(const VertexAttribute &attrib)
      : mType(attrib.type),
        mNormalized(attrib.normalized ? GL_TRUE : GL_FALSE),
        mComponents(attrib.size),
        mPureInteger(attrib.pureInteger)
  {
      // Ensure we aren't initializing a vertex format which should be using
      // the current-value type
      ASSERT(attrib.enabled);
  
      // Float data can not be normalized, so ignore the user setting
      if (mType == GL_FLOAT || mType == GL_HALF_FLOAT || mType == GL_FIXED)
      {
          mNormalized = GL_FALSE;
      }
  }
  
  VertexFormat::VertexFormat(const VertexAttribute &attrib, GLenum currentValueType)
      : mType(attrib.type),
        mNormalized(attrib.normalized ? GL_TRUE : GL_FALSE),
        mComponents(attrib.size),
        mPureInteger(attrib.pureInteger)
  {
      if (!attrib.enabled)
      {
          mType = currentValueType;
          mNormalized = GL_FALSE;
          mComponents = 4;
          mPureInteger = (currentValueType != GL_FLOAT);
      }
  
      // Float data can not be normalized, so ignore the user setting
      if (mType == GL_FLOAT || mType == GL_HALF_FLOAT || mType == GL_FIXED)
      {
          mNormalized = GL_FALSE;
      }
  }
  
  void VertexFormat::GetInputLayout(VertexFormat *inputLayout,
                                    ProgramBinary *programBinary,
                                    const State &state)
  {
      const VertexAttribute *vertexAttributes = state.getVertexArray()->getVertexAttributes();
      for (unsigned int attributeIndex = 0; attributeIndex < MAX_VERTEX_ATTRIBS; attributeIndex++)
      {
          int semanticIndex = programBinary->getSemanticIndex(attributeIndex);
  
          if (semanticIndex != -1)
          {
              inputLayout[semanticIndex] = VertexFormat(vertexAttributes[attributeIndex], state.getVertexAttribCurrentValue(attributeIndex).Type);
          }
      }
  }
  
  bool VertexFormat::operator==(const VertexFormat &other) const
  {
      return (mType == other.mType                &&
              mComponents == other.mComponents    &&
              mNormalized == other.mNormalized    &&
              mPureInteger == other.mPureInteger  );
  }
  
  bool VertexFormat::operator!=(const VertexFormat &other) const
  {
      return !(*this == other);
  }
  
  bool VertexFormat::operator<(const VertexFormat& other) const
  {
      if (mType != other.mType)
      {
          return mType < other.mType;
      }
      if (mNormalized != other.mNormalized)
      {
          return mNormalized < other.mNormalized;
      }
      if (mComponents != other.mComponents)
      {
          return mComponents < other.mComponents;
      }
      return mPureInteger < other.mPureInteger;
  }
  
  }
  

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