Include mesa-6.4.1 project

1 files changed, 475 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa_6.4.1/progs/demos/cubemap.c b/nx-X11/extras/Mesa_6.4.1/progs/demos/cubemap.c
new file mode 100644
index 000000000..0a59b9898
--- /dev/null
+++ b/nx-X11/extras/Mesa_6.4.1/progs/demos/cubemap.c
@@ -0,0 +1,475 @@
+/*
+ * GL_ARB_texture_cube_map demo
+ *
+ * Brian Paul
+ * May 2000
+ *
+ *
+ * Copyright (C) 2000  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * This is a pretty minimalistic demo for now.  Eventually, use some
+ * interesting cube map textures and 3D objects.
+ * For now, we use 6 checkerboard "walls" and a sphere (good for
+ * verification purposes).
+ */
+
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "GL/glut.h"
+#include "readtex.h"
+
+
+static GLfloat Xrot = 0, Yrot = 0;
+static GLfloat EyeDist = 10;
+static GLboolean use_vertex_arrays = GL_FALSE;
+static GLboolean anim = GL_TRUE;
+
+#define eps1 0.99
+#define br   20.0  /* box radius */
+
+static const GLfloat tex_coords[] = {
+   /* +X side */
+   1.0, -eps1, -eps1,
+   1.0, -eps1,  eps1,
+   1.0,  eps1,  eps1,
+   1.0,  eps1, -eps1,
+
+   /* -X side */
+   -1.0,  eps1, -eps1,
+   -1.0,  eps1,  eps1,
+   -1.0, -eps1,  eps1,
+   -1.0, -eps1, -eps1,
+
+   /* +Y side */
+   -eps1, 1.0, -eps1,
+   -eps1, 1.0,  eps1,
+    eps1, 1.0,  eps1,
+    eps1, 1.0, -eps1,
+
+   /* -Y side */
+   -eps1, -1.0, -eps1,
+   -eps1, -1.0,  eps1,
+    eps1, -1.0,  eps1,
+    eps1, -1.0, -eps1,
+
+   /* +Z side */
+    eps1, -eps1, 1.0,
+   -eps1, -eps1, 1.0,
+   -eps1,  eps1, 1.0,
+    eps1,  eps1, 1.0,
+
+   /* -Z side */
+    eps1,  eps1, -1.0,
+   -eps1,  eps1, -1.0,
+   -eps1, -eps1, -1.0,
+    eps1, -eps1, -1.0,
+};
+
+static const GLfloat vtx_coords[] = {
+   /* +X side */
+   br, -br, -br,
+   br, -br,  br,
+   br,  br,  br,
+   br,  br, -br,
+
+   /* -X side */
+   -br,  br, -br,
+   -br,  br,  br,
+   -br, -br,  br,
+   -br, -br, -br,
+
+   /* +Y side */
+   -br,  br, -br,
+   -br,  br,  br,
+    br,  br,  br,
+    br,  br, -br,
+
+   /* -Y side */
+   -br, -br, -br,
+   -br, -br,  br,
+    br, -br,  br,
+    br, -br, -br,
+
+   /* +Z side */
+    br, -br, br,
+   -br, -br, br,
+   -br,  br, br,
+    br,  br, br,
+
+   /* -Z side */
+    br,  br, -br,
+   -br,  br, -br,
+   -br, -br, -br,
+    br, -br, -br,
+};
+
+static void draw_skybox( void )
+{
+   if ( use_vertex_arrays ) {
+      glTexCoordPointer( 3, GL_FLOAT, 0, tex_coords );
+      glVertexPointer(   3, GL_FLOAT, 0, vtx_coords );
+
+      glEnableClientState( GL_TEXTURE_COORD_ARRAY );
+      glEnableClientState( GL_VERTEX_ARRAY );
+
+      glDrawArrays( GL_QUADS, 0, 24 );
+
+      glDisableClientState( GL_TEXTURE_COORD_ARRAY );
+      glDisableClientState( GL_VERTEX_ARRAY );
+   }
+   else {
+      unsigned   i;
+
+      glBegin(GL_QUADS);
+      for ( i = 0 ; i < 24 ; i++ ) {
+	 glTexCoord3fv( & tex_coords[ i * 3 ] );
+	 glVertex3fv  ( & vtx_coords[ i * 3 ] );
+      }
+      glEnd();
+   }
+}
+
+
+static void draw( void )
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix(); /*MODELVIEW*/
+      glTranslatef( 0.0, 0.0, -EyeDist );
+
+      /* skybox */
+      glDisable(GL_TEXTURE_GEN_S);
+      glDisable(GL_TEXTURE_GEN_T);
+      glDisable(GL_TEXTURE_GEN_R);
+
+      glMatrixMode(GL_MODELVIEW);
+      glPushMatrix();
+         glRotatef(Xrot, 1, 0, 0);
+         glRotatef(Yrot, 0, 1, 0);
+         draw_skybox();
+      glPopMatrix();
+
+      /* sphere */
+      glMatrixMode(GL_TEXTURE);
+      glLoadIdentity();
+      glRotatef(-Yrot, 0, 1, 0);
+      glRotatef(-Xrot, 1, 0, 0);
+
+      glEnable(GL_TEXTURE_GEN_S);
+      glEnable(GL_TEXTURE_GEN_T);
+      glEnable(GL_TEXTURE_GEN_R);
+      glutSolidSphere(2.0, 20, 20);
+
+      glLoadIdentity(); /* texture */
+
+      glMatrixMode(GL_MODELVIEW);
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void idle(void)
+{
+   GLfloat t = 0.05 * glutGet(GLUT_ELAPSED_TIME);
+   Yrot = t;
+   glutPostRedisplay();
+}
+
+
+static void set_mode(GLuint mode)
+{
+   if (mode == 0) {
+      glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
+      glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
+      glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
+      printf("GL_REFLECTION_MAP_ARB mode\n");
+   }
+   else if (mode == 1) {
+      glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB);
+      glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB);
+      glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB);
+      printf("GL_NORMAL_MAP_ARB mode\n");
+   }
+}
+
+
+static void key(unsigned char k, int x, int y)
+{
+   static GLuint mode = 0;
+   (void) x;
+   (void) y;
+   switch (k) {
+      case ' ':
+         anim = !anim;
+         if (anim)
+            glutIdleFunc(idle);
+         else
+            glutIdleFunc(NULL);
+         break;
+      case 'm':
+         mode = !mode;
+         set_mode(mode);
+         break;
+      case 'v':
+         use_vertex_arrays = ! use_vertex_arrays;
+         printf( "Vertex arrays are %sabled\n",
+		 (use_vertex_arrays) ? "en" : "dis" );
+         break;
+      case 'z':
+         EyeDist -= 0.5;
+         if (EyeDist < 6.0)
+            EyeDist = 6.0;
+         break;
+      case 'Z':
+         EyeDist += 0.5;
+         if (EyeDist > 90.0)
+            EyeDist = 90;
+         break;
+      case 27:
+         exit(0);
+   }
+   glutPostRedisplay();
+}
+
+
+static void specialkey(int key, int x, int y)
+{
+   GLfloat step = 5;
+   (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();
+}
+
+
+/* new window size or exposure */
+static void reshape(int width, int height)
+{
+   GLfloat ar = (float) width / (float) height;
+   glViewport(0, 0, (GLint)width, (GLint)height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum( -2.0*ar, 2.0*ar, -2.0, 2.0, 4.0, 100.0 );
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+
+static void init_checkers( void )
+{
+#define CUBE_TEX_SIZE 64
+   GLubyte image[CUBE_TEX_SIZE][CUBE_TEX_SIZE][3];
+   static const GLubyte colors[6][3] = {
+      { 255,   0,   0 },	/* face 0 - red */
+      {   0, 255, 255 },	/* face 1 - cyan */
+      {   0, 255,   0 },	/* face 2 - green */
+      { 255,   0, 255 },	/* face 3 - purple */
+      {   0,   0, 255 },	/* face 4 - blue */
+      { 255, 255,   0 }		/* face 5 - yellow */
+   };
+   static const GLenum targets[6] = {
+      GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
+      GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
+      GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
+      GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
+      GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
+      GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
+   };
+
+   GLint i, j, f;
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+   /* make colored checkerboard cube faces */
+   for (f = 0; f < 6; f++) {
+      for (i = 0; i < CUBE_TEX_SIZE; i++) {
+         for (j = 0; j < CUBE_TEX_SIZE; j++) {
+            if ((i/4 + j/4) & 1) {
+               image[i][j][0] = colors[f][0];
+               image[i][j][1] = colors[f][1];
+               image[i][j][2] = colors[f][2];
+            }
+            else {
+               image[i][j][0] = 255;
+               image[i][j][1] = 255;
+               image[i][j][2] = 255;
+            }
+         }
+      }
+
+      glTexImage2D(targets[f], 0, GL_RGB, CUBE_TEX_SIZE, CUBE_TEX_SIZE, 0,
+                   GL_RGB, GL_UNSIGNED_BYTE, image);
+   }
+}
+
+
+static void load(GLenum target, const char *filename,
+                 GLboolean flipTB, GLboolean flipLR)
+{
+   GLint w, h;
+   GLenum format;
+   GLubyte *img = LoadRGBImage( filename, &w, &h, &format );
+   if (!img) {
+      printf("Error: couldn't load texture image %s\n", filename);
+      exit(1);
+   }
+   assert(format == GL_RGB);
+
+   /* <sigh> the way the texture cube mapping works, we have to flip
+    * images to make things look right.
+    */
+   if (flipTB) {
+      const int stride = 3 * w;
+      GLubyte temp[3*1024];
+      int i;
+      for (i = 0; i < h / 2; i++) {
+         memcpy(temp, img + i * stride, stride);
+         memcpy(img + i * stride, img + (h - i - 1) * stride, stride);
+         memcpy(img + (h - i - 1) * stride, temp, stride);
+      }
+   }
+   if (flipLR) {
+      const int stride = 3 * w;
+      GLubyte temp[3];
+      GLubyte *row;
+      int i, j;
+      for (i = 0; i < h; i++) {
+         row = img + i * stride;
+         for (j = 0; j < w / 2; j++) {
+            int k = w - j - 1;
+            temp[0] = row[j*3+0];
+            temp[1] = row[j*3+1];
+            temp[2] = row[j*3+2];
+            row[j*3+0] = row[k*3+0];
+            row[j*3+1] = row[k*3+1];
+            row[j*3+2] = row[k*3+2];
+            row[k*3+0] = temp[0];
+            row[k*3+1] = temp[1];
+            row[k*3+2] = temp[2];
+         }
+      }
+   }
+
+   gluBuild2DMipmaps(target, GL_RGB, w, h, format, GL_UNSIGNED_BYTE, img);
+   free(img);
+}
+
+
+static void load_envmaps(void)
+{
+   load(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB, "right.rgb", GL_TRUE, GL_FALSE);
+   load(GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB, "left.rgb", GL_TRUE, GL_FALSE);
+   load(GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB, "top.rgb", GL_FALSE, GL_TRUE);
+   load(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB, "bottom.rgb", GL_FALSE, GL_TRUE);
+   load(GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB, "front.rgb", GL_TRUE, GL_FALSE);
+   load(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB, "back.rgb", GL_TRUE, GL_FALSE);
+}
+
+
+static void init( GLboolean useImageFiles )
+{
+   GLenum filter;
+
+   /* check for extension */
+   {
+      char *exten = (char *) glGetString(GL_EXTENSIONS);
+      if (!strstr(exten, "GL_ARB_texture_cube_map")) {
+         printf("Sorry, this demo requires GL_ARB_texture_cube_map\n");
+         exit(0);
+      }
+   }
+   printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER));
+
+   if (useImageFiles) {
+      load_envmaps();
+      filter = GL_LINEAR;
+   }
+   else {
+      init_checkers();
+      filter = GL_NEAREST;
+   }
+
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER, filter);
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER, filter);
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+   glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+   glEnable(GL_TEXTURE_CUBE_MAP_ARB);
+   glEnable(GL_DEPTH_TEST);
+
+   glClearColor(.3, .3, .3, 0);
+   glColor3f( 1.0, 1.0, 1.0 );
+
+   set_mode(0);
+}
+
+
+static void usage(void)
+{
+   printf("keys:\n");
+   printf("  SPACE - toggle animation\n");
+   printf("  CURSOR KEYS - rotation\n");
+   printf("  m - toggle texgen reflection mode\n");
+   printf("  z/Z - change viewing distance\n");
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(600, 500);
+   glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
+   glutCreateWindow("Texture Cube Mapping");
+
+   if (argc > 1 && strcmp(argv[1] , "-i") == 0)
+      init( 1 );
+   else
+      init( 0 );
+   glutReshapeFunc( reshape );
+   glutKeyboardFunc( key );
+   glutSpecialFunc( specialkey );
+   glutDisplayFunc( draw );
+   if (anim)
+      glutIdleFunc(idle);
+   usage();
+   glutMainLoop();
+   return 0;
+}