#include "ttessellator.h"

//#include "tvectorrenderdata.h"

#include "tregionoutline.h"

#include "drawutil.h"

#include "tcolorfunctions.h"

#include "tthread.h"

#include "tcg/tcg_numeric_ops.h"

#include "trop.h"

//#include "tlevel_io.h"

#ifndef _WIN32

#define CALLBACK

#endif

// To avoid linking problems with HP ZX2000

#if defined(LINUX) || defined(FREEBSD)

#ifdef GLU_VERSION_1_2

#undef GLU_VERSION_1_2

#endif

#ifndef GLU_VERSION_1_1

#define GLU_VERSION_1_1

#endif

#endif

//==================================================================

#ifndef checkErrorsByGL

#define checkErrorsByGL                                                        \

  {                                                                            \

    GLenum err = glGetError();                                                 \

    assert(err != GL_INVALID_ENUM);                                            \

    assert(err != GL_INVALID_VALUE);                                           \

    assert(err != GL_INVALID_OPERATION);                                       \

    assert(err != GL_STACK_OVERFLOW);                                          \

    assert(err != GL_STACK_UNDERFLOW);                                         \

    assert(err != GL_OUT_OF_MEMORY);                                           \

    assert(err == GL_NO_ERROR);                                                \

  }

#endif

TglTessellator::GLTess::GLTess() {

  m_tess = gluNewTess();

  assert(m_tess);

}

//------------------------------------------------------------------

TglTessellator::GLTess::~GLTess() { gluDeleteTess(m_tess); }

//==================================================================

namespace {

extern "C" {

static void CALLBACK tessellateTexture(const GLdouble *tex) {

  double u = tex[0] * 0.01;

  double v = tex[1] * 0.01;

  glTexCoord2d(u, v);

  glVertex2dv(tex);

}

}

//-------------------------------------------------------------------

TThread::Mutex CombineDataGuard;

static std::list<gldouble *=""> Combine_data;</gldouble>

extern "C" {

static void CALLBACK myCombine(GLdouble coords[3], GLdouble *d[4], GLfloat w[4],

                               GLdouble **dataOut) {

  GLdouble *newCoords = new GLdouble[3];

  newCoords[0] = coords[0];

  newCoords[1] = coords[1];

  newCoords[2] = coords[2];

  Combine_data.push_back(newCoords);

  *dataOut = newCoords;

}

}

//===================================================================

// typedef std::vector<t3dpointd>::iterator Vect3D_iter;</t3dpointd>

//-------------------------------------------------------------------

}

//-------------------------------------------------------------------

#ifdef _WIN32

typedef GLvoid(CALLBACK *GluCallback)(void);

#endif

#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD)

typedef GLvoid (*GluCallback)();

#endif

void TglTessellator::doTessellate(GLTess &glTess, const TColorFunction *cf,

                                  const bool antiAliasing,

                                  TRegionOutline outline, const TAffine &aff) {

  QMutexLocker sl(&CombineDataGuard);

  Combine_data.clear();

  assert(glTess.m_tess);

  gluTessCallback(glTess.m_tess, GLU_TESS_BEGIN, (GluCallback)glBegin);

  gluTessCallback(glTess.m_tess, GLU_TESS_END, (GluCallback)glEnd);

  gluTessCallback(glTess.m_tess, GLU_TESS_COMBINE, (GluCallback)myCombine);

#ifdef GLU_VERSION_1_2

  gluTessBeginPolygon(glTess.m_tess, NULL);

  gluTessProperty(glTess.m_tess, GLU_TESS_WINDING_RULE,

                  GLU_TESS_WINDING_POSITIVE);

#else

#ifdef GLU_VERSION_1_1

  gluBeginPolygon(glTess.m_tess);

#else

  assert(false);

#endif

#endif

  for (TRegionOutline::Boundary::iterator poly_it = outline.m_exterior.begin();

       poly_it != outline.m_exterior.end(); ++poly_it) {

#ifdef GLU_VERSION_1_2

    gluTessBeginContour(glTess.m_tess);

#else

#ifdef GLU_VERSION_1_1

    gluNextContour(glTess.m_tess, GLU_EXTERIOR);

#else

    assert(false);

#endif

#endif

    for (TRegionOutline::PointVector::iterator it = poly_it->begin();

         it != poly_it->end(); ++it) {

      // T3DPointD p = *it;

      it->x = aff.a11 * it->x + aff.a12 * it->y;

      it->y = aff.a21 * it->x + aff.a22 * it->y;

      gluTessVertex(glTess.m_tess, &(it->x), &(it->x));

    }

#ifdef GLU_VERSION_1_2

    gluTessEndContour(glTess.m_tess);

#endif

  }

  int subRegionNumber = outline.m_interior.size();

  if (subRegionNumber > 0) {

    for (TRegionOutline::Boundary::iterator poly_it =

             outline.m_interior.begin();

         poly_it != outline.m_interior.end(); ++poly_it) {

#ifdef GLU_VERSION_1_2

      gluTessBeginContour(glTess.m_tess);

#else

#ifdef GLU_VERSION_1_1

      gluNextContour(glTess.m_tess, GLU_INTERIOR);

#else

      assert(false);

#endif

#endif

      for (TRegionOutline::PointVector::reverse_iterator rit =

               poly_it->rbegin();

           rit != poly_it->rend(); ++rit) {

        // T3DPointD p = *rit;

        rit->x = aff.a11 * rit->x + aff.a12 * rit->y;

        rit->y = aff.a21 * rit->x + aff.a22 * rit->y;

        gluTessVertex(glTess.m_tess, &(rit->x), &(rit->x));

      }

#ifdef GLU_VERSION_1_2

      gluTessEndContour(glTess.m_tess);

#endif

    }

  }

#ifdef GLU_VERSION_1_2

  gluTessEndPolygon(glTess.m_tess);

#else

#ifdef GLU_VERSION_1_1

  gluEndPolygon(glTess.m_tess);

#else

  assert(false);

#endif

#endif

  std::list<gldouble *="">::iterator beginIt, endIt;</gldouble>

  endIt   = Combine_data.end();

  beginIt = Combine_data.begin();

  for (; beginIt != endIt; ++beginIt) delete[](*beginIt);

}

void TglTessellator::doTessellate(GLTess &glTess, const TColorFunction *cf,

                                  const bool antiAliasing,

                                  TRegionOutline &outline) {

  QMutexLocker sl(&CombineDataGuard);

  Combine_data.clear();

  assert(glTess.m_tess);

  gluTessCallback(glTess.m_tess, GLU_TESS_BEGIN, (GluCallback)glBegin);

  gluTessCallback(glTess.m_tess, GLU_TESS_END, (GluCallback)glEnd);

  gluTessCallback(glTess.m_tess, GLU_TESS_COMBINE, (GluCallback)myCombine);

#ifdef GLU_VERSION_1_2

  gluTessBeginPolygon(glTess.m_tess, NULL);

  gluTessProperty(glTess.m_tess, GLU_TESS_WINDING_RULE,

                  GLU_TESS_WINDING_POSITIVE);

#else

#ifdef GLU_VERSION_1_1

  gluBeginPolygon(glTess.m_tess);

#else

  assert(false);

#endif

#endif

  for (TRegionOutline::Boundary::iterator poly_it = outline.m_exterior.begin();

       poly_it != outline.m_exterior.end(); ++poly_it) {

#ifdef GLU_VERSION_1_2

    gluTessBeginContour(glTess.m_tess);

#else

#ifdef GLU_VERSION_1_1

    gluNextContour(glTess.m_tess, GLU_EXTERIOR);

#else

    assert(false);

#endif

#endif

    for (TRegionOutline::PointVector::iterator it = poly_it->begin();

         it != poly_it->end(); ++it)

      gluTessVertex(glTess.m_tess, &(it->x), &(it->x));

#ifdef GLU_VERSION_1_2

    gluTessEndContour(glTess.m_tess);

#endif

  }

  int subRegionNumber = outline.m_interior.size();

  if (subRegionNumber > 0) {

    for (TRegionOutline::Boundary::iterator poly_it =

             outline.m_interior.begin();

         poly_it != outline.m_interior.end(); ++poly_it) {

#ifdef GLU_VERSION_1_2

      gluTessBeginContour(glTess.m_tess);

#else

#ifdef GLU_VERSION_1_1

      gluNextContour(glTess.m_tess, GLU_INTERIOR);

#else

      assert(false);

#endif

#endif

      for (TRegionOutline::PointVector::reverse_iterator rit =

               poly_it->rbegin();

           rit != poly_it->rend(); ++rit)

        gluTessVertex(glTess.m_tess, &(rit->x), &(rit->x));

#ifdef GLU_VERSION_1_2

      gluTessEndContour(glTess.m_tess);

#endif

    }

  }

#ifdef GLU_VERSION_1_2

  gluTessEndPolygon(glTess.m_tess);

#else

#ifdef GLU_VERSION_1_1

  gluEndPolygon(glTess.m_tess);

#else

  assert(false);

#endif

#endif

  std::list<gldouble *="">::iterator beginIt, endIt;</gldouble>

  endIt   = Combine_data.end();

  beginIt = Combine_data.begin();

  for (; beginIt != endIt; ++beginIt) delete[](*beginIt);

}

//------------------------------------------------------------------

void TglTessellator::tessellate(const TColorFunction *cf,

                                const bool antiAliasing,

                                TRegionOutline &outline, TPixel32 color) {

  if (cf) color = (*(cf))(color);

  if (color.m == 0) return;

  bool transparencyFlag = color.m < 255;

  tglColor(color);

  if (transparencyFlag) {

    tglEnableLineSmooth();

  }

  TglTessellator::GLTess glTess;

  gluTessCallback(glTess.m_tess, GLU_TESS_VERTEX, (GluCallback)glVertex3dv);

  //------------------------//

  doTessellate(glTess, cf, antiAliasing, outline);

  //------------------------//

  if (antiAliasing && outline.m_doAntialiasing) {

    tglEnableLineSmooth();

    for (TRegionOutline::Boundary::iterator poly_it =

             outline.m_exterior.begin();

         poly_it != outline.m_exterior.end(); ++poly_it) {

      std::vector<gldouble> v;</gldouble>

      if (poly_it->size() == 0) continue;

      v.resize(poly_it->size() * 2);

      int i = 0;

      for (TRegionOutline::PointVector::iterator it = poly_it->begin();

           it != poly_it->end(); ++it) {

        v[i++] = it->x;

        v[i++] = it->y;

      }

      glEnableClientState(GL_VERTEX_ARRAY);

      glVertexPointer(2, GL_DOUBLE, sizeof(GLdouble) * 2, &v[0]);

      glDrawArrays(GL_LINE_LOOP, 0, v.size() / 2);

      glDisableClientState(GL_VERTEX_ARRAY);

    }

    for (TRegionOutline::Boundary::iterator poly_it =

             outline.m_interior.begin();

         poly_it != outline.m_interior.end(); ++poly_it) {

      std::vector<gldouble> v;</gldouble>

      v.resize(poly_it->size() * 2);

      int i = 0;

      for (TRegionOutline::PointVector::iterator it = poly_it->begin();

           it != poly_it->end(); ++it) {

        v[i++] = it->x;

        v[i++] = it->y;

      }

      if (v.empty()) continue;

      glEnableClientState(GL_VERTEX_ARRAY);

      glVertexPointer(2, GL_DOUBLE, sizeof(GLdouble) * 2, &v[0]);

      glDrawArrays(GL_LINE_LOOP, 0, v.size() / 2);

      glDisableClientState(GL_VERTEX_ARRAY);

    }

  }

}

//------------------------------------------------------------------

void TglTessellator::tessellate(const TColorFunction *cf,

                                const bool antiAliasing,

                                TRegionOutline &outline, TRaster32P texture) {

  // QMutexLocker sl(m_mutex);

  checkErrorsByGL;

  glEnable(GL_TEXTURE_2D);

  glColor4d(1, 1, 1, 1);

  checkErrorsByGL;

  TextureInfoForGL texInfo;

  int pow2Lx = tcg::numeric_ops::GE_2Power((unsigned int)texture->getLx());

  int pow2Ly = tcg::numeric_ops::GE_2Power((unsigned int)texture->getLy());

  TAffine aff;

  if (texture->getLx() != pow2Lx || texture->getLy() != pow2Ly) {

    TRaster32P r(pow2Lx, pow2Ly);

    aff = TScale((double)pow2Lx / texture->getLx(),

                 (double)pow2Ly / texture->getLy());

    TRop::resample(r, texture,

                   aff.place(texture->getCenterD(), r->getCenterD()));

    texture = r;

    glPushMatrix();

    tglMultMatrix(aff.inv());

  }

  // If GL_BRGA isn't present make a proper texture to use (... obsolete?)

  texture->lock();

  TRasterP texImage = prepareTexture(texture, texInfo);

  checkErrorsByGL;

  if (texImage != texture) texImage->lock();

  assert(texImage->getLx() == texImage->getWrap());

  GLuint texId;

  glGenTextures(1, &texId);  // Generate a texture name

  checkErrorsByGL;

  glBindTexture(GL_TEXTURE_2D, texId);  // Bind it 'active'

  checkErrorsByGL;

  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,

                  GL_REPEAT);  // These must be invoked

  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,

                  GL_REPEAT);  // on a bound texture

  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);  //

  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);  //

  checkErrorsByGL;

  glTexEnvf(GL_TEXTURE_ENV,       // This too ?

            GL_TEXTURE_ENV_MODE,  // Better here anyway

            GL_MODULATE);         //

  checkErrorsByGL;

  glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);

  checkErrorsByGL;

  glTexImage2D(GL_TEXTURE_2D,

               0,                       // one level only

               texInfo.internalformat,  // pixel channels count

               texInfo.width,           // width

               texInfo.height,          // height

               0,                       // border size

               texInfo.type,    // pixel format           // crappy names

               texInfo.format,  // pixel data type        // oh, SO much

               texImage->getRawData());

  checkErrorsByGL;

  texture->unlock();

  if (texImage != texture) texImage->unlock();

  TglTessellator::GLTess glTess;

  gluTessCallback(glTess.m_tess, GLU_TESS_VERTEX,

                  (GluCallback)tessellateTexture);

  checkErrorsByGL;

  //------------------------//

  if (aff != TAffine())

    doTessellate(glTess, cf, antiAliasing, outline,

                 aff);  // Tessellate & render

  else

    doTessellate(glTess, cf, antiAliasing, outline);  // Tessellate & render

  checkErrorsByGL;

  //------------------------//

  if (aff != TAffine()) glPopMatrix();

  glDeleteTextures(1, &texId);  // Delete & unbind texture

  checkErrorsByGL;

  glDisable(GL_TEXTURE_2D);

  checkErrorsByGL;

}

//------------------------------------------------------------------

// TglTessellator::GLTess TglTessellator::m_glTess;

//=============================================================================