/*
 * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and
 * its documentation for any purpose is hereby granted without fee, provided
 * that (i) the above copyright notices and this permission notice appear in
 * all copies of the software and related documentation, and (ii) the name of
 * Silicon Graphics may not be used in any advertising or
 * publicity relating to the software without the specific, prior written
 * permission of Silicon Graphics.
 *
 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
 * ANY KIND,
 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
 *
 * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "gltk.h"

#define PI 3.141592654
#define	BLACK 0
#define	GRAY 128
#define	WHITE 255
#define RD 0xA4,0x00,0x00,0xFF
#define WT 0xFF,0xFF,0xFF,0xFF
#define	brickImageWidth 16
#define	brickImageHeight 16

GLenum rgb, doubleBuffer, directRender;

float black[3] =
{
  0.0, 0.0, 0.0
};
float blue[3] =
{
  0.0, 0.0, 1.0
};
float gray[3] =
{
  0.5, 0.5, 0.5
};
float white[3] =
{
  1.0, 1.0, 1.0
};

GLenum doDither = GL_TRUE;
GLenum shade = GL_TRUE;
GLenum texture = GL_TRUE;

float xRotation = 30.0, yRotation = 30.0, zRotation = 0.0;
GLint radius1, radius2;
GLdouble angle1, angle2;
GLint slices, stacks;
GLint height;
GLint orientation = GLU_OUTSIDE;
GLint whichQuadric = 0;
GLUquadricObj *quadObj;

GLubyte brickImage[4 * brickImageWidth * brickImageHeight] =
{
  RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD,
  RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD,
  RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD,
  RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD,
  WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT,
  RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD,
  RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD,
  RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD,
  RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD, RD,
  WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT,
  RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD,
  RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD,
  RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD,
  RD, RD, RD, RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD,
  WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT, WT,
  RD, RD, RD, RD, WT, RD, RD, RD, RD, RD, RD, RD, RD, RD, WT, RD
};
char *texFileName = 0;

static void CALLBACK ErrorHandler(GLenum which)
{

  fprintf(stderr, "Quad Error: %s\n", gluErrorString(which));
}

static void Init(void)
{
  static GLint colorIndexes[3] =
  {0, 200, 255};
  static float ambient[] =
  {0.1, 0.1, 0.1, 1.0};
  static float diffuse[] =
  {0.5, 1.0, 1.0, 1.0};
  static float position[] =
  {90.0, 90.0, 150.0, 0.0};
  static float front_mat_shininess[] =
  {30.0};
  static float front_mat_specular[] =
  {0.2, 0.2, 0.2, 1.0};
  static float front_mat_diffuse[] =
  {0.5, 0.28, 0.38, 1.0};
  static float back_mat_shininess[] =
  {50.0};
  static float back_mat_specular[] =
  {0.5, 0.5, 0.2, 1.0};
  static float back_mat_diffuse[] =
  {1.0, 1.0, 0.2, 1.0};
  static float lmodel_ambient[] =
  {1.0, 1.0, 1.0, 1.0};
  static float lmodel_twoside[] =
  {GL_TRUE};
  static float decal[] =
  {GL_DECAL};
  static float repeat[] =
  {GL_REPEAT};
  static float nearest[] =
  {GL_NEAREST};
  TK_RGBImageRec *image;

  if (!rgb) {
    tkSetGreyRamp();
  }
  glClearColor(0.0, 0.0, 0.0, 0.0);

  glEnable(GL_DEPTH_TEST);

  glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
  glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
  glLightfv(GL_LIGHT0, GL_POSITION, position);
  glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
  glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
  glEnable(GL_LIGHTING);
  glEnable(GL_LIGHT0);

  glMaterialfv(GL_FRONT, GL_SHININESS, front_mat_shininess);
  glMaterialfv(GL_FRONT, GL_SPECULAR, front_mat_specular);
  glMaterialfv(GL_FRONT, GL_DIFFUSE, front_mat_diffuse);
  glMaterialfv(GL_BACK, GL_SHININESS, back_mat_shininess);
  glMaterialfv(GL_BACK, GL_SPECULAR, back_mat_specular);
  glMaterialfv(GL_BACK, GL_DIFFUSE, back_mat_diffuse);
  if (!rgb) {
    glMaterialiv(GL_FRONT_AND_BACK, GL_COLOR_INDEXES, colorIndexes);
  }

  glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, decal);
  glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, repeat);
  glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, repeat);
  glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, nearest);
  glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, nearest);
  if (texFileName) {
    image = tkRGBImageLoad(texFileName);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    gluBuild2DMipmaps(GL_TEXTURE_2D, 3, image->sizeX, image->sizeY,
		      GL_RGB, GL_UNSIGNED_BYTE, image->data);
  }
  else {
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glTexImage2D(GL_TEXTURE_2D, 0, 4, brickImageWidth, brickImageHeight,
		 0, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *) brickImage);
  }

  quadObj = gluNewQuadric();
  gluQuadricCallback(quadObj, GLU_ERROR, ErrorHandler);

  radius1 = 10;
  radius2 = 5;
  angle1 = 90;
  angle2 = 180;
  slices = 16;
  stacks = 10;
  height = 20;
}

static void Reshape(int width, int height)
{

  glViewport(0, 0, (GLint) width, (GLint) height);

  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  glFrustum(-1, 1, -1, 1, 1, 10);
  gluLookAt(2, 2, 2, 0, 0, 0, 0, 0, 1);
  glMatrixMode(GL_MODELVIEW);
}

static GLenum Key(int key, GLenum mask)
{

  switch (key) {
    case TK_ESCAPE:
      tkQuit();

    case TK_LEFT:
      yRotation += 5;
      break;
    case TK_RIGHT:
      yRotation -= 5;
      break;
    case TK_UP:
      xRotation += 5;
      break;
    case TK_DOWN:
      xRotation -= 5;
      break;
    case TK_X:
      zRotation += 5;
      break;
    case TK_x:
      zRotation -= 5;
      break;

    case TK_1:
      gluQuadricDrawStyle(quadObj, GLU_FILL);
      break;
    case TK_2:
      gluQuadricDrawStyle(quadObj, GLU_POINT);
      break;
    case TK_3:
      gluQuadricDrawStyle(quadObj, GLU_LINE);
      break;
    case TK_4:
      gluQuadricDrawStyle(quadObj, GLU_SILHOUETTE);
      break;

    case TK_0:
      shade = !shade;
      if (shade) {
	glShadeModel(GL_SMOOTH);
	gluQuadricNormals(quadObj, GLU_SMOOTH);
      }
      else {
	glShadeModel(GL_FLAT);
	gluQuadricNormals(quadObj, GLU_FLAT);
      }
      break;

    case TK_A:
      stacks++;
      break;
    case TK_a:
      stacks--;
      break;

    case TK_S:
      slices++;
      break;
    case TK_s:
      slices--;
      break;

    case TK_d:
      switch (orientation) {
	case GLU_OUTSIDE:
	  orientation = GLU_INSIDE;
	  break;
	case GLU_INSIDE:
	default:
	  orientation = GLU_OUTSIDE;
	  break;
      }
      gluQuadricOrientation(quadObj, orientation);
      break;

    case TK_f:
      whichQuadric = (whichQuadric + 1) % 4;
      break;

    case TK_G:
      radius1 += 1;
      break;
    case TK_g:
      radius1 -= 1;
      break;

    case TK_J:
      radius2 += 1;
      break;
    case TK_j:
      radius2 -= 1;
      break;

    case TK_H:
      height += 2;
      break;
    case TK_h:
      height -= 2;
      break;

    case TK_K:
      angle1 += 5;
      break;
    case TK_k:
      angle1 -= 5;
      break;

    case TK_L:
      angle2 += 5;
      break;
    case TK_l:
      angle2 -= 5;
      break;

    case TK_z:
      texture = !texture;
      if (texture) {
	gluQuadricTexture(quadObj, GL_TRUE);
	glEnable(GL_TEXTURE_2D);
      }
      else {
	gluQuadricTexture(quadObj, GL_FALSE);
	glDisable(GL_TEXTURE_2D);
      }
      break;

    case TK_q:
      glDisable(GL_CULL_FACE);
      break;
    case TK_w:
      glEnable(GL_CULL_FACE);
      glCullFace(GL_FRONT);
      break;
    case TK_e:
      glEnable(GL_CULL_FACE);
      glCullFace(GL_BACK);
      break;

    case TK_r:
      glFrontFace(GL_CW);
      break;
    case TK_t:
      glFrontFace(GL_CCW);
      break;

    case TK_y:
      doDither = !doDither;
      (doDither) ? glEnable(GL_DITHER) : glDisable(GL_DITHER);
      break;

    default:
      return GL_FALSE;
  }
  return GL_TRUE;
}

static void Draw(void)
{

  glLoadIdentity();
  glRotatef(xRotation, 1, 0, 0);
  glRotatef(yRotation, 0, 1, 0);
  glRotatef(zRotation, 0, 0, 1);

  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  glColor3f(1.0, 1.0, 1.0);
  switch (whichQuadric) {
    case 0:
      glTranslatef(0, 0, -height / 20.0);
      gluCylinder(quadObj, radius1 / 10.0, radius2 / 10.0, height / 10.0,
		  slices, stacks);
      break;
    case 1:
      gluSphere(quadObj, radius1 / 10.0, slices, stacks);
      break;
    case 2:
      gluPartialDisk(quadObj, radius2 / 10.0, radius1 / 10.0, slices,
		     stacks, angle1, angle2);
      break;
    case 3:
      gluDisk(quadObj, radius2 / 10.0, radius1 / 10.0, slices, stacks);
      break;
  }

  glFlush();

  if (doubleBuffer) {
    tkSwapBuffers();
  }
}

static GLenum Args(int argc, char **argv)
{
  GLint i;

  rgb = GL_TRUE;
  doubleBuffer = GL_FALSE;
  directRender = GL_TRUE;

  for (i = 1; i < argc; i++) {
    if (strcmp(argv[i], "-ci") == 0) {
      rgb = GL_FALSE;
    }
    else if (strcmp(argv[i], "-rgb") == 0) {
      rgb = GL_TRUE;
    }
    else if (strcmp(argv[i], "-sb") == 0) {
      doubleBuffer = GL_FALSE;
    }
    else if (strcmp(argv[i], "-db") == 0) {
      doubleBuffer = GL_TRUE;
    }
    else if (strcmp(argv[i], "-dr") == 0) {
      directRender = GL_TRUE;
    }
    else if (strcmp(argv[i], "-ir") == 0) {
      directRender = GL_FALSE;
    }
    else if (strcmp(argv[i], "-f") == 0) {
      if (i + 1 >= argc || argv[i + 1][0] == '-') {
	printf("-f (No file name).\n");
	return GL_FALSE;
      }
      else {
	texFileName = argv[++i];
      }
    }
    else {
      printf("%s (Bad option).\n", argv[i]);
      return GL_FALSE;
    }
  }
  return GL_TRUE;
}

void main(int argc, char **argv)
{
  GLenum type;

  if (Args(argc, argv) == GL_FALSE) {
    tkQuit();
  }

  tkInitPosition(0, 0, 300, 300);

  type = TK_DEPTH;
  type |= (rgb) ? TK_RGB : TK_INDEX;
  type |= (doubleBuffer) ? TK_DOUBLE : TK_SINGLE;
  type |= (directRender) ? TK_DIRECT : TK_INDIRECT;
  tkInitDisplayMode(type);

  if (tkInitWindow("Quad Test") == GL_FALSE) {
    tkQuit();
  }

  Init();

  tkExposeFunc(Reshape);
  tkReshapeFunc(Reshape);
  tkKeyDownFunc(Key);
  tkDisplayFunc(Draw);
  tkExec();
}