5 files changed, 21 insertions, 10 deletions
diff --git a/progs/demos/cubemap.c b/progs/demos/cubemap.c
index 26db42aed5e..1f9f2905759 100644
--- a/progs/demos/cubemap.c
+++ b/progs/demos/cubemap.c
@@ -52,6 +52,7 @@ static GLboolean NoClear = GL_FALSE;
 static GLint FrameParity = 0;
 static GLenum FilterIndex = 0;
 static GLint ClampIndex = 0;
+static GLboolean supportFBO = GL_FALSE;
 
 
 static struct {
@@ -403,6 +404,10 @@ static void init_checkers( void )
 
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 
+   if (!supportFBO)
+      glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
+
+
    /* make colored checkerboard cube faces */
    for (f = 0; f < 6; f++) {
       for (i = 0; i < CUBE_TEX_SIZE; i++) {
@@ -426,7 +431,8 @@ static void init_checkers( void )
                    GL_BGRA, GL_UNSIGNED_BYTE, image);
    }
 
-   glGenerateMipmapEXT(GL_TEXTURE_CUBE_MAP_ARB);
+   if (supportFBO)
+      glGenerateMipmapEXT(GL_TEXTURE_CUBE_MAP_ARB);
 }
 
 
@@ -503,10 +509,13 @@ static void init( GLboolean useImageFiles )
          exit(0);
       }
 
-      /* Needed for glGenerateMipmapEXT
+      /* Needed for glGenerateMipmapEXT / auto mipmapping
        */
-      if (!strstr(exten, "GL_EXT_framebuffer_object")) {
-         printf("Sorry, this demo requires GL_EXT_framebuffer_object\n");
+      if (strstr(exten, "GL_EXT_framebuffer_object")) {
+         supportFBO = GL_TRUE;
+      }
+      else if (!strstr(exten, "GL_SGIS_generate_mipmap")) {
+         printf("Sorry, this demo requires GL_EXT_framebuffer_object or GL_SGIS_generate_mipmap\n");
          exit(0);
       }
    }
diff --git a/progs/demos/isosurf.c b/progs/demos/isosurf.c
index 6923ca2bba8..2e9dff17261 100644
--- a/progs/demos/isosurf.c
+++ b/progs/demos/isosurf.c
@@ -847,8 +847,8 @@ static void Init(int argc, char *argv[])
 
    glClearColor(0.0, 0.0, 1.0, 0.0);
    glEnable( GL_DEPTH_TEST );
-   glEnable( GL_VERTEX_ARRAY_EXT );
-   glEnable( GL_NORMAL_ARRAY_EXT );
+   glEnableClientState( GL_VERTEX_ARRAY );
+   glEnableClientState( GL_NORMAL_ARRAY );
 
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
diff --git a/progs/demos/pointblast.c b/progs/demos/pointblast.c
index 2a91b76ad32..2d70b725894 100644
--- a/progs/demos/pointblast.c
+++ b/progs/demos/pointblast.c
@@ -194,11 +194,11 @@ redraw(void)
 {
   int i;
 
+  glDepthMask(GL_TRUE);
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   if (newModel)
     recalcModelView();
 
-  glDepthMask(GL_FALSE);
 
   /* Draw the floor. */
 /*  glEnable(GL_TEXTURE_2D);*/
@@ -215,7 +215,7 @@ redraw(void)
   glEnd();
 
   /* Allow particles to blend with each other. */
-  glDepthMask(GL_TRUE);
+  glDepthMask(GL_FALSE);
 
   if (blend)
      glEnable(GL_BLEND);
diff --git a/progs/demos/spriteblast.c b/progs/demos/spriteblast.c
index f6630c25d07..d73b680b791 100644
--- a/progs/demos/spriteblast.c
+++ b/progs/demos/spriteblast.c
@@ -209,13 +209,13 @@ redraw(void)
 {
   int i;
 
+  glDepthMask(GL_TRUE);
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
   glPushMatrix();
   glRotatef(15.0, 1.0, 0.0, 0.0);
   glRotatef(angle, 0.0, 1.0, 0.0);
 
-  glDepthMask(GL_FALSE);
 
   /* Draw the floor. */
 /*  glEnable(GL_TEXTURE_2D);*/
@@ -232,7 +232,7 @@ redraw(void)
   glEnd();
 
   /* Allow particles to blend with each other. */
-  glDepthMask(GL_TRUE);
+  glDepthMask(GL_FALSE);
 
   if (blend)
      glEnable(GL_BLEND);
diff --git a/progs/demos/vao_demo.c b/progs/demos/vao_demo.c
index ce416712fe2..206e06fc6c7 100644
--- a/progs/demos/vao_demo.c
+++ b/progs/demos/vao_demo.c
@@ -260,6 +260,8 @@ static void Key( unsigned char key, int x, int y )
    (void) y;
    switch (key) {
       case 27:
+         (*delete_vertex_arrays)( 1, & cube_array_obj );
+         (*delete_vertex_arrays)( 1, & oct_array_obj );
          glutDestroyWindow(Win);
          exit(0);
          break;