Squashed 'nx-X11/extras/Mesa_6.4.2/' content from commit 475b1f7

git-subtree-dir: nx-X11/extras/Mesa_6.4.2
git-subtree-split: 475b1f7b56fa36ef4f3b22a749f88a98ddc0d502

1 files changed, 288 insertions, 0 deletions

diff --git a/progs/demos/texcyl.c b/progs/demos/texcyl.c
new file mode 100644
index 000000000..c04d5004e
--- /dev/null
+++ b/progs/demos/texcyl.c
@@ -0,0 +1,288 @@
+
+/*
+ * Textured cylinder demo: lighting, texturing, reflection mapping.
+ *
+ * Command line options:
+ *    -info      print GL implementation information
+ *
+ *
+ * Brian Paul  May 1997  This program is in the public domain.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#include "readtex.h"
+
+#define TEXTURE_FILE "../images/reflect.rgb"
+
+#define LIT 1
+#define TEXTURED 2
+#define REFLECT 3
+#define ANIMATE 10
+#define POINT_FILTER 20
+#define LINEAR_FILTER 21
+#define QUIT 100
+
+static GLuint CylinderObj = 0;
+static GLboolean Animate = GL_TRUE;
+
+static GLfloat Xrot = 0.0, Yrot = 0.0, Zrot = 0.0;
+static GLfloat DXrot = 50.0, DYrot = 125.0;
+
+/* performance info */
+static GLint T0 = 0;
+static GLint Frames = 0;
+
+
+static void Idle( void )
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+
+   if (Animate) {
+      Xrot += DXrot * dt;
+      Yrot += DYrot * dt;
+      glutPostRedisplay();
+   }
+}
+
+
+static void Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef(Xrot, 1.0, 0.0, 0.0);
+   glRotatef(Yrot, 0.0, 1.0, 0.0);
+   glRotatef(Zrot, 0.0, 0.0, 1.0);
+   glScalef(5.0, 5.0, 5.0);
+   glCallList(CylinderObj);
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+
+   if (Animate) {
+      GLint t = glutGet(GLUT_ELAPSED_TIME);
+      Frames++;
+      if (t - T0 >= 5000) {
+         GLfloat seconds = (t - T0) / 1000.0;
+         GLfloat fps = Frames / seconds;
+         printf("%d frames in %g seconds = %g FPS\n", Frames, seconds, fps);
+         T0 = t;
+         Frames = 0;
+      }
+   }
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 10.0, 100.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -70.0 );
+}
+
+
+static void SetMode(GLuint m)
+{
+   /* disable everything */
+   glDisable(GL_LIGHTING);
+   glDisable(GL_TEXTURE_2D);
+   glDisable(GL_TEXTURE_GEN_S);
+   glDisable(GL_TEXTURE_GEN_T);
+
+   /* enable what's needed */
+   if (m==LIT) {
+      glEnable(GL_LIGHTING);
+   }
+   else if (m==TEXTURED) {
+      glEnable(GL_TEXTURE_2D);
+   }
+   else if (m==REFLECT) {
+      glEnable(GL_TEXTURE_2D);
+      glEnable(GL_TEXTURE_GEN_S);
+      glEnable(GL_TEXTURE_GEN_T);
+   }
+}
+
+
+static void ModeMenu(int entry)
+{
+   if (entry==ANIMATE) {
+      Animate = !Animate;
+      if (Animate)
+         glutIdleFunc(Idle);
+      else
+         glutIdleFunc(NULL);
+   }
+   else if (entry==POINT_FILTER) {
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+   }
+   else if (entry==LINEAR_FILTER) {
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   }
+   else if (entry==QUIT) {
+      exit(0);
+   }
+   else {
+      SetMode(entry);
+   }
+   glutPostRedisplay();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case ' ':
+      Animate = !Animate;
+      if (Animate)
+         glutIdleFunc(Idle);
+      else
+         glutIdleFunc(NULL);
+      break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   float step = 3.0;
+   (void) x;
+   (void) y;
+
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot += step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot += step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot -= step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+   GLUquadricObj *q = gluNewQuadric();
+   CylinderObj = glGenLists(1);
+   glNewList(CylinderObj, GL_COMPILE);
+
+   glTranslatef(0.0, 0.0, -1.0);
+
+   /* cylinder */
+   gluQuadricNormals(q, GL_SMOOTH);
+   gluQuadricTexture(q, GL_TRUE);
+   gluCylinder(q, 0.6, 0.6, 2.0, 24, 1);
+
+   /* end cap */
+   glTranslatef(0.0, 0.0, 2.0);
+   gluDisk(q, 0.0, 0.6, 24, 1);
+
+   /* other end cap */
+   glTranslatef(0.0, 0.0, -2.0);
+   gluQuadricOrientation(q, GLU_INSIDE);
+   gluDisk(q, 0.0, 0.6, 24, 1);
+
+   glEndList();
+   gluDeleteQuadric(q);
+
+   /* lighting */
+   glEnable(GL_LIGHTING);
+   {
+      GLfloat gray[4] = {0.2, 0.2, 0.2, 1.0};
+      GLfloat white[4] = {1.0, 1.0, 1.0, 1.0};
+      GLfloat teal[4] = { 0.0, 1.0, 0.8, 1.0 };
+      glMaterialfv(GL_FRONT, GL_DIFFUSE, teal);
+      glLightfv(GL_LIGHT0, GL_AMBIENT, gray);
+      glLightfv(GL_LIGHT0, GL_DIFFUSE, white);
+      glEnable(GL_LIGHT0);
+   }
+
+   /* fitering = nearest, initially */
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
+   glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
+
+   glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+   glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+
+   if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
+      printf("Error: couldn't load texture image\n");
+      exit(1);
+   }
+
+   glEnable(GL_CULL_FACE);  /* don't need Z testing for convex objects */
+
+   SetMode(LIT);
+
+   if (argc > 1 && strcmp(argv[1], "-info")==0) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+   }
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowSize( 400, 400 );
+   glutInitWindowPosition( 0, 0 );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+
+   glutCreateWindow(argv[0] );
+
+   Init(argc, argv);
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   glutIdleFunc( Idle );
+
+   glutCreateMenu(ModeMenu);
+   glutAddMenuEntry("Lit", LIT);
+   glutAddMenuEntry("Textured", TEXTURED);
+   glutAddMenuEntry("Reflect", REFLECT);
+   glutAddMenuEntry("Point Filtered", POINT_FILTER);
+   glutAddMenuEntry("Linear Filtered", LINEAR_FILTER);
+   glutAddMenuEntry("Toggle Animation", ANIMATE);
+   glutAddMenuEntry("Quit", QUIT);
+   glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+   glutMainLoop();
+   return 0;
+}