7 files changed, 12 insertions, 15 deletions
diff --git a/progs/glsl/bump.c b/progs/glsl/bump.c
index 87669aec73..50a0900f1c 100644
--- a/progs/glsl/bump.c
+++ b/progs/glsl/bump.c
@@ -36,7 +36,7 @@ static GLint win = 0;
 
 static GLfloat xRot = 20.0f, yRot = 0.0f, zRot = 0.0f;
 
-static GLuint tangentAttrib;
+static GLint tangentAttrib;
 
 static GLboolean Anim = GL_FALSE;
 
diff --git a/progs/glsl/convolutions.c b/progs/glsl/convolutions.c
index c2fb76e1aa..350e61bbdc 100644
--- a/progs/glsl/convolutions.c
+++ b/progs/glsl/convolutions.c
@@ -369,7 +369,7 @@ static void keyPress(unsigned char key, int x, int y)
    case 27:
       exit(0);
    default:
-      return;
+      break;
    }
    glutPostRedisplay();
 }
diff --git a/progs/glsl/deriv.c b/progs/glsl/deriv.c
index 265a515715..30f2b75fef 100644
--- a/progs/glsl/deriv.c
+++ b/progs/glsl/deriv.c
@@ -140,6 +140,7 @@ MakeSphere(void)
    glNewList(SphereList, GL_COMPILE);
    gluSphere(obj, 2.0f, 30, 15);
    glEndList();
+   gluDeleteQuadric(obj);
 }
 
 
diff --git a/progs/glsl/multitex.c b/progs/glsl/multitex.c
index bf46fd5210..49b32253ee 100644
--- a/progs/glsl/multitex.c
+++ b/progs/glsl/multitex.c
@@ -369,12 +369,9 @@ InitPrograms(void)
 static void
 InitGL(void)
 {
-   const char *version = (const char *) glGetString(GL_VERSION);
+   if (!ShadersSupported())
+      exit(1);
 
-   if (version[0] != '2' || version[1] != '.') {
-      printf("Warning: this program expects OpenGL 2.0\n");
-      /*exit(1);*/
-   }
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
    printf("Usage:\n");
    printf("  a     - toggle arrays vs. immediate mode rendering\n");
diff --git a/progs/glsl/shtest.c b/progs/glsl/shtest.c
index 628a7dd5b9..9d76e018e3 100644
--- a/progs/glsl/shtest.c
+++ b/progs/glsl/shtest.c
@@ -627,7 +627,7 @@ Init(void)
    NumAttribs = GetAttribs(Program, Attribs);
    PrintAttribs(Attribs);
 
-   //assert(glGetError() == 0);
+   /*assert(glGetError() == 0);*/
 
    glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
 
diff --git a/progs/glsl/texaaline.c b/progs/glsl/texaaline.c
index 2e4f932ad6..4ad5a761c6 100644
--- a/progs/glsl/texaaline.c
+++ b/progs/glsl/texaaline.c
@@ -310,8 +310,10 @@ MakeMipmap(void)
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-   //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, 4);
-   ////glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 5);
+   /*
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, 4);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 5);
+   */
 
    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 #undef SZ
diff --git a/progs/glsl/texdemo1.c b/progs/glsl/texdemo1.c
index 5b1913a722..2076e6aef9 100644
--- a/progs/glsl/texdemo1.c
+++ b/progs/glsl/texdemo1.c
@@ -400,11 +400,8 @@ InitPrograms(void)
 static void
 Init(GLboolean useImageFiles)
 {
-   const char *version = (const char *) glGetString(GL_VERSION);
-
-   if (version[0] != '2' || version[1] != '.') {
-      printf("Warning: this program expects OpenGL 2.0\n");
-      /*exit(1);*/
+   if (!ShadersSupported()) {
+      exit(1);
    }
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));