Merge branch 'master' of git+ssh://joukj@git.freedesktop.org/git/mesa/mesa

8 files changed, 369 insertions, 138 deletions

diff --git a/progs/demos/multiarb.c b/progs/demos/multiarb.c
index d963985c69..451fd11efe 100644
--- a/progs/demos/multiarb.c
+++ b/progs/demos/multiarb.c
@@ -1,4 +1,3 @@
-
 /*
  * GL_ARB_multitexture demo
  *
@@ -32,7 +31,6 @@ static GLint NumUnits = 1;
 static GLboolean TexEnabled[8];
 
 static GLfloat Drift = 0.0;
-static GLfloat drift_increment = 0.005;
 static GLfloat Xrot = 20.0, Yrot = 30.0, Zrot = 0.0;
 
 
@@ -41,9 +39,7 @@ static void Idle( void )
    if (Animate) {
       GLint i;
 
-      Drift += drift_increment;
-      if (Drift >= 1.0)
-         Drift = 0.0;
+      Drift = glutGet(GLUT_ELAPSED_TIME) * 0.001;
 
       for (i = 0; i < NumUnits; i++) {
          glActiveTextureARB(GL_TEXTURE0_ARB + i);
@@ -57,10 +53,11 @@ static void Idle( void )
             glTranslatef(0.0, Drift, 0.0);
          }
          else {
-            glTranslatef(0.5, 0.5, 0.0);
+            float tx = 0.5, ty = 0.5;
+            glTranslatef(tx, ty, 0.0);
             glRotatef(180.0 * Drift, 0, 0, 1);
             glScalef(1.0/i, 1.0/i, 1.0/i);
-            glTranslatef(-0.5, -0.5, 0.0);
+            glTranslatef(-tx, -ty + i * 0.1, 0.0);
          }
       }
       glMatrixMode(GL_MODELVIEW);
@@ -72,10 +69,9 @@ static void Idle( void )
 
 static void DrawObject(void)
 {
-   GLint i;
-   GLint j;
-   static const GLfloat   tex_coords[] = {  0.0,  0.0,  1.0,  1.0,  0.0 };
-   static const GLfloat   vtx_coords[] = { -1.0, -1.0,  1.0,  1.0, -1.0 };
+   static const GLfloat tex_coords[] = {  0.0,  0.0,  1.0,  1.0,  0.0 };
+   static const GLfloat vtx_coords[] = { -1.0, -1.0,  1.0,  1.0, -1.0 };
+   GLint i, j;
 
    if (!TexEnabled[0] && !TexEnabled[1])
       glColor3f(0.1, 0.1, 0.1);  /* add onto this */
@@ -83,37 +79,20 @@ static void DrawObject(void)
       glColor3f(1, 1, 1);  /* modulate this */
 
    glBegin(GL_QUADS);
-
-   /* Toggle between the vector and scalar entry points.  This is done purely
-    * to hit multiple paths in the driver.
-    */
-   if ( Drift > 0.49 ) {
-      for (j = 0; j < 4; j++ ) {
-	 for (i = 0; i < NumUnits; i++)
-	    glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, 
-				 tex_coords[j], tex_coords[j+1]);
-	 glVertex2f( vtx_coords[j], vtx_coords[j+1] );
-      }
-   }
-   else {
-      for (j = 0; j < 4; j++ ) {
-	 for (i = 0; i < NumUnits; i++)
-	    glMultiTexCoord2fvARB(GL_TEXTURE0_ARB + i, & tex_coords[j]);
-	 glVertex2fv( & vtx_coords[j] );
+   for (j = 0; j < 4; j++ ) {
+      for (i = 0; i < NumUnits; i++) {
+         if (TexEnabled[i])
+            glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, 
+                                 tex_coords[j], tex_coords[j+1]);
       }
+      glVertex2f( vtx_coords[j], vtx_coords[j+1] );
    }
-
    glEnd();
 }
 
 
-
 static void Display( void )
 {
-   static GLint T0 = 0;
-   static GLint Frames = 0;
-   GLint t;
-
    glClear( GL_COLOR_BUFFER_BIT );
 
    glPushMatrix();
@@ -125,16 +104,6 @@ static void Display( void )
    glPopMatrix();
 
    glutSwapBuffers();
-
-   Frames++;
-
-   t = glutGet(GLUT_ELAPSED_TIME);
-   if (t - T0 >= 250) {
-      GLfloat seconds = (t - T0) / 1000.0;
-      drift_increment = 2.2 * seconds / Frames;
-      T0 = t;
-      Frames = 0;
-   }
 }
 
 
@@ -151,24 +120,34 @@ static void Reshape( int width, int height )
 }
 
 
+static void ToggleUnit(int unit)
+{
+   TexEnabled[unit] = !TexEnabled[unit];
+   glActiveTextureARB(GL_TEXTURE0_ARB + unit);
+   if (TexEnabled[unit])
+      glEnable(GL_TEXTURE_2D);
+   else
+      glDisable(GL_TEXTURE_2D);
+   printf("Enabled: ");
+   for (unit = 0; unit < NumUnits; unit++)
+      printf("%d ", (int) TexEnabled[unit]);
+   printf("\n");
+}
+
+
 static void ModeMenu(int entry)
 {
    if (entry >= TEX0 && entry <= TEX7) {
       /* toggle */
       GLint i = entry - TEX0;
-      TexEnabled[i] = !TexEnabled[i];
-      glActiveTextureARB(GL_TEXTURE0_ARB + i);
-      if (TexEnabled[i])
-         glEnable(GL_TEXTURE_2D);
-      else
-         glDisable(GL_TEXTURE_2D);
-      printf("Enabled: ");
-      for (i = 0; i < NumUnits; i++)
-         printf("%d ", (int) TexEnabled[i]);
-      printf("\n");
+      ToggleUnit(i);
    }
    else if (entry==ANIMATE) {
       Animate = !Animate;
+      if (Animate)
+         glutIdleFunc(Idle);
+      else
+         glutIdleFunc(NULL);
    }
    else if (entry==QUIT) {
       exit(0);
@@ -183,9 +162,36 @@ static void Key( unsigned char key, int x, int y )
    (void) x;
    (void) y;
    switch (key) {
-      case 27:
-         exit(0);
-         break;
+   case 'a':
+      Animate = !Animate;
+      break;
+   case '0':
+      ToggleUnit(0);
+      break;
+   case '1':
+      ToggleUnit(1);
+      break;
+   case '2':
+      ToggleUnit(2);
+      break;
+   case '3':
+      ToggleUnit(3);
+      break;
+   case '4':
+      ToggleUnit(4);
+      break;
+   case '5':
+      ToggleUnit(5);
+      break;
+   case '6':
+      ToggleUnit(6);
+      break;
+   case '7':
+      ToggleUnit(7);
+      break;
+   case 27:
+      exit(0);
+      break;
    }
    glutPostRedisplay();
 }
@@ -327,7 +333,8 @@ int main( int argc, char *argv[] )
    glutKeyboardFunc( Key );
    glutSpecialFunc( SpecialKey );
    glutDisplayFunc( Display );
-   glutIdleFunc( Idle );
+   if (Animate)
+      glutIdleFunc(Idle);
 
    glutCreateMenu(ModeMenu);
 
diff --git a/progs/glsl/trirast.c b/progs/glsl/trirast.c
index e4325deb1f..2842755447 100644
--- a/progs/glsl/trirast.c
+++ b/progs/glsl/trirast.c
@@ -106,8 +106,12 @@ Redisplay(void)
 static void
 Idle(void)
 {
-   Zrot = glutGet(GLUT_ELAPSED_TIME) * 0.0005;
-   glutPostRedisplay();
+   if (anim) {
+      Zrot = glutGet(GLUT_ELAPSED_TIME) * 0.0005;
+      glutPostRedisplay();
+   }
+   else
+      abort();
 }
 
 
@@ -149,6 +153,12 @@ Key(unsigned char key, int x, int y)
       else
          glutIdleFunc(NULL);
       break;
+   case 'z':
+      Zrot = 0;
+      break;
+   case 's':
+      Zrot += 0.05;
+      break;
    case 27:
       CleanUp();
       exit(0);
diff --git a/progs/samples/blendeq.c b/progs/samples/blendeq.c
index f78afd3038..d5143ecdf5 100644
--- a/progs/samples/blendeq.c
+++ b/progs/samples/blendeq.c
@@ -25,6 +25,27 @@ static int doPrint = 1;
 static int deltaY;
 GLint windW, windH;
 
+static const struct {
+   GLenum mode;
+   const char *name;
+} LogicOpModes[] = {
+   { GL_SET, "GL_SET" },
+   { GL_COPY, "GL_COPY" },
+   { GL_NOOP, "GL_NOOP" },
+   { GL_AND, "GL_AND" },
+   { GL_INVERT, "GL_INVERT" },
+   { GL_OR, "GL_OR" },
+   { GL_XOR, "GL_XOR" },
+   { GL_NOR, "GL_NOR" },
+   { GL_NAND, "GL_NAND" },
+   { GL_OR_REVERSE, "GL_OR_REVERSE" },
+   { GL_OR_INVERTED, "GL_OR_INVERTED" },
+   { GL_AND_INVERTED, "GL_AND_INVERTED" },
+   { 0, NULL }
+};
+
+
+
 static void DrawString(const char *string)
 {
     int i;
@@ -47,7 +68,7 @@ static void Reshape(int width, int height)
     windH = (GLint)height;
 
     glViewport(0, 0, (GLint)width, (GLint)height);
-    deltaY = windH /16;
+    deltaY = windH /20;
 
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
@@ -105,7 +126,7 @@ static void Draw(void)
 {
     int stringOffset = 5, stringx = 8;
     int x1, x2, xleft, xright;
-    int i;
+    int i, k;
 
     (dithering) ? glEnable(GL_DITHER) : glDisable(GL_DITHER);
     glDisable(GL_BLEND);
@@ -122,6 +143,7 @@ static void Draw(void)
     /* Draw labels */
     glColor3f(0.8, 0.8, 0.0);
     i = windH - deltaY + stringOffset;
+
     glRasterPos2f(stringx, i); i -= deltaY;
     DrawString("SOURCE");
     glRasterPos2f(stringx, i); i -= deltaY;
@@ -136,21 +158,12 @@ static void Draw(void)
     DrawString("reverse_subtract");
     glRasterPos2f(stringx, i); i -= deltaY;
     DrawString("clear");
-    glRasterPos2f(stringx, i); i -= deltaY;
-    DrawString("set");
-    glRasterPos2f(stringx, i); i -= deltaY;
-    DrawString("copy");
-    glRasterPos2f(stringx, i); i -= deltaY;
-    DrawString("noop");
-    glRasterPos2f(stringx, i); i -= deltaY;
-    DrawString("and");
-    glRasterPos2f(stringx, i); i -= deltaY;
-    DrawString("invert");
-    glRasterPos2f(stringx, i); i -= deltaY;
-    DrawString("or");
-    glRasterPos2f(stringx, i); i -= deltaY;
-    DrawString("xor");
 
+    for (k = 0; LogicOpModes[k].name; k++) {
+       glRasterPos2f(stringx, i);
+       i -= deltaY;
+       DrawString(LogicOpModes[k].name);
+    }
 
     i = windH - deltaY;
     x1 = windW/4;
@@ -193,43 +206,23 @@ static void Draw(void)
     glLogicOp(GL_CLEAR);
     glRectf(x1, i, x2, i+deltaY);
 
-    i -= deltaY;
-    glLogicOp(GL_SET);
-    glRectf(x1, i, x2, i+deltaY);
-
-    i -= deltaY;
-    glLogicOp(GL_COPY);
-    glRectf(x1, i, x2, i+deltaY);
-
-    i -= deltaY;
-    glLogicOp(GL_NOOP);
-    glRectf(x1, i, x2, i+deltaY);
-
-    i -= deltaY;
-    glLogicOp(GL_AND);
-    glRectf(x1, i, x2, i+deltaY);
-
-    i -= deltaY;
-    glLogicOp(GL_INVERT);
-    glRectf(x1, i, x2, i+deltaY);
-
-    i -= deltaY;
-    glLogicOp(GL_OR);
-    glRectf(x1, i, x2, i+deltaY);
-
-    i -= deltaY;
-    glLogicOp(GL_XOR);
-    glRectf(x1, i, x2, i+deltaY);
-    glRectf(x1, i+10, x2, i+5);
+    for (k = 0; LogicOpModes[k].name; k++) {
+       i -= deltaY;
+       glLogicOp(LogicOpModes[k].mode);
+       glRectf(x1, i, x2, i+deltaY);
+       if (LogicOpModes[k].mode == GL_XOR) {
+          glRectf(x1, i+10, x2, i+5);
+       }
+    }
 
-  if (doPrint) {
-      glDisable(GL_BLEND);
-      if (supportlogops & 2)
+    if (doPrint) {
+       glDisable(GL_BLEND);
+       if (supportlogops & 2)
           glDisable(GL_COLOR_LOGIC_OP);
-      glColor3f(1.0, 1.0, 1.0);
-      PrintColorStrings();
-  }
-  glFlush();
+       glColor3f(1.0, 1.0, 1.0);
+       PrintColorStrings();
+    }
+    glFlush();
 
     if (doubleBuffer) {
        glutSwapBuffers();
@@ -271,7 +264,7 @@ int main(int argc, char **argv)
 	exit(1);
     }
 
-    glutInitWindowPosition(0, 0); glutInitWindowSize( 800, 400);
+    glutInitWindowPosition(0, 0); glutInitWindowSize( 800, 520);
 
     type = GLUT_RGB;
     type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
diff --git a/progs/tests/Makefile b/progs/tests/Makefile
index 454b0adf9c..18b051a14c 100644
--- a/progs/tests/Makefile
+++ b/progs/tests/Makefile
@@ -35,6 +35,7 @@ SOURCES = \
 	cva.c \
 	dinoshade.c \
 	drawbuffers.c \
+	exactrast.c \
 	floattex.c \
 	fbotest1.c \
 	fbotest2.c \
diff --git a/progs/tests/exactrast.c b/progs/tests/exactrast.c
new file mode 100644
index 0000000000..56c0c79c3f
--- /dev/null
+++ b/progs/tests/exactrast.c
@@ -0,0 +1,200 @@
+/**
+ * Test for exact point/line/polygon rasterization, or at least rasterization
+ * that fits the tolerance of the OpenGL spec.
+ *
+ * Brian Paul
+ * 9 Nov 2007
+ */
+
+/*
+ * Notes:
+ * - 'm' to cycle through point, hline, vline and quad drawing
+ * - Use cursor keys to translate coordinates (z to reset)
+ * - Resize window to check for proper rasterization
+ * - Make sure your LCD is running in its native resolution
+ *   
+ * If translation is (0,0):
+ *  a point will be drawn where x%2==0 and y%2==0,
+ *  a horizontal line will be drawn where x%2==0,
+ *  a vertical line will be drawn where y%2==0,
+ *  for quads, pixels will be set where (x%4)!=3 and (y%4)!=3
+ *
+ * XXX todo: do glReadPixels and test that the results are what's expected.
+ * Upon failure, iterate over sub-pixel translations to find the ideal offset.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+
+static int Width = 400, Height = 400;
+static int Win;
+static float Xtrans = 0, Ytrans = 0;
+static float Step = 0.125;
+
+enum {
+   POINTS,
+   HLINES,
+   VLINES,
+   QUADS,
+   NUM_MODES
+};
+
+static int Mode = POINTS;
+
+
+static void
+Draw(void)
+{
+   /* See the OpenGL Programming Guide, Appendix H, "OpenGL Correctness Tips"
+    * for information about the 0.375 translation factor.
+    */
+   float tx = 0.375, ty = 0.375;
+   int i, j;
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+   glTranslatef(tx + Xtrans, ty + Ytrans, 0);
+
+   if (Mode == POINTS) {
+      glBegin(GL_POINTS);
+      for (j = 0; j < Height; j += 2) {
+         for (i = 0; i < Width; i += 2) {
+            glVertex2f(i, j);
+         }
+      }
+      glEnd();
+   }
+   else if (Mode == HLINES) {
+      glBegin(GL_LINES);
+      for (i = 0; i < Height; i += 2) {
+         glVertex2f(0,     i);
+         glVertex2f(Width, i);
+      }
+      glEnd();
+   }
+   else if (Mode == VLINES) {
+      glBegin(GL_LINES);
+      for (i = 0; i < Width; i += 2) {
+         glVertex2f(i, 0     );
+         glVertex2f(i, Height);
+      }
+      glEnd();
+   }
+   else if (Mode == QUADS) {
+      glBegin(GL_QUADS);
+      for (j = 0; j < Height; j += 4) {
+         for (i = 0; i < Width; i += 4) {
+            glVertex2f(i,     j    );
+            glVertex2f(i + 3, j    );
+            glVertex2f(i + 3, j + 3);
+            glVertex2f(i,     j + 3);
+         }
+      }
+      glEnd();
+   }
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void
+Reshape(int width, int height)
+{
+   Width = width;
+   Height = height;
+   glViewport(0, 0, width, height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(0, width, 0, height, -1, 1);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+   case 'm':
+   case 'M':
+      Mode = (Mode + 1) % NUM_MODES;
+      break;
+   case 'z':
+   case 'Z':
+      Xtrans = Ytrans = 0;
+      printf("Translation: %f, %f\n", Xtrans, Ytrans);
+      break;
+   case 27:
+      glutDestroyWindow(Win);
+      exit(0);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+   case GLUT_KEY_UP:
+      Ytrans += Step;
+      break;
+   case GLUT_KEY_DOWN:
+      Ytrans -= Step;
+      break;
+   case GLUT_KEY_LEFT:
+      Xtrans -= Step;
+      break;
+   case GLUT_KEY_RIGHT:
+      Xtrans += Step;
+      break;
+   }
+   glutPostRedisplay();
+   printf("Translation: %f, %f\n", Xtrans, Ytrans);
+}
+
+
+static void
+Init(void)
+{
+}
+
+
+static void
+Usage(void)
+{
+   printf("Keys:\n");
+   printf("  up/down/left/right - translate by %f\n", Step);
+   printf("  z - reset translation to zero\n");
+   printf("  m - change rendering mode (points, hlines, vlines, quads)\n");
+   printf("  Esc - exit\n");
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(Width, Height);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+   Win = glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Draw);
+   Init();
+   Usage();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/tests/texline.c b/progs/tests/texline.c
index 3d59d9ac26..d3935b94af 100644
--- a/progs/tests/texline.c
+++ b/progs/tests/texline.c
@@ -7,7 +7,6 @@
  * September 2000
  */
 
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
@@ -211,7 +210,9 @@ static void SpecialKey( int key, int x, int y )
 
 static void Init( int argc, char *argv[] )
 {
+   GLfloat r[2];
    GLuint u;
+
    for (u = 0; u < 2; u++) {
       glActiveTextureARB(GL_TEXTURE0_ARB + u);
       glBindTexture(GL_TEXTURE_2D, 10+u);
@@ -242,6 +243,15 @@ static void Init( int argc, char *argv[] )
       printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
       printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
    }
+
+   glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, r);
+   printf("Non-smooth point size range: %g .. %g\n", r[0], r[1]);
+   glGetFloatv(GL_POINT_SIZE_RANGE, r);
+   printf("Smoothed point size range: %g .. %g\n", r[0], r[1]);
+   glGetFloatv(GL_ALIASED_LINE_WIDTH_RANGE, r);
+   printf("Non-smooth line width range: %g .. %g\n", r[0], r[1]);
+   glGetFloatv(GL_LINE_WIDTH_RANGE, r);
+   printf("Smoothed line width range: %g .. %g\n", r[0], r[1]);
 }
 
 
diff --git a/progs/trivial/point-param.c b/progs/trivial/point-param.c
index c5424682b8..02500cd34e 100644
--- a/progs/trivial/point-param.c
+++ b/progs/trivial/point-param.c
@@ -22,15 +22,14 @@
  * OF THIS SOFTWARE.
  */
 
+#define GL_GLEXT_PROTOTYPES
+#include <math.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <GL/glut.h>
 
 
-#define CI_OFFSET_1 16
-#define CI_OFFSET_2 32
-
 
 GLenum doubleBuffer;
 
@@ -40,53 +39,63 @@ static void Init(void)
    fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
    fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
 
-    glClearColor(0.0, 0.0, 1.0, 0.0);
+   glClearColor(0.0, 0.0, 1.0, 0.0);
 }
 
 static void Reshape(int width, int height)
 {
-
     glViewport(0, 0, (GLint)width, (GLint)height);
 
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
-    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
+    glOrtho(-1.0, 1.0, -1.0, 1.0, 0, 100.0);
     glMatrixMode(GL_MODELVIEW);
 }
 
 static void Key(unsigned char key, int x, int y)
 {
-
     switch (key) {
-      case 27:
+    case 27:
 	exit(1);
-      default:
+    default:
 	return;
     }
-
     glutPostRedisplay();
 }
 
+
+static float
+expected(float z, float size, const float atten[3])
+{
+   float dist = fabs(z);
+   const GLfloat q = atten[0] + dist * (atten[1] + dist * atten[2]);
+   const GLfloat a = sqrt(1.0 / q);
+   return size * a;
+}
+
+
 static void Draw(void)
 {
-   static GLfloat theQuad[3] = { 0.25, 0.0, 1/60.0 };
+   static GLfloat atten[3] = { 0.0, 0.1, .01 };
+   float size = 40.0;
+   int i;
 
    glClear(GL_COLOR_BUFFER_BIT); 
 
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-   glPointSize(8.0);
-   glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, theQuad); 
+   glPointSize(size);
+   glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, atten); 
 
+   glColor3f(1,0,0); 
 
+   printf("Expected point sizes:\n");
    glBegin(GL_POINTS);
-   glColor3f(1,0,0); 
-   glVertex3f( 0.9, -0.9, -30.0);
-   glColor3f(1,1,0); 
-   glVertex3f( 0.9,  0.9, -30.0);
-   glColor3f(1,0,1); 
-   glVertex3f(-0.9,  0.9, -30.0);
-   glColor3f(0,1,1); 
-   glVertex3f(-0.9,  -0.9, -30.0);
+   for (i = 0; i < 5; i++) {
+      float x = -0.8 + i * 0.4;
+      float z = -i * 20 - 10;
+      glVertex3f( x, 0.0, z);
+      printf(" %f\n", expected(z, size, atten));
+   }
    glEnd();
 
    glFlush();
@@ -96,6 +105,7 @@ static void Draw(void)
    }
 }
 
+
 static GLenum Args(int argc, char **argv)
 {
     GLint i;
@@ -115,6 +125,7 @@ static GLenum Args(int argc, char **argv)
     return GL_TRUE;
 }
 
+
 int main(int argc, char **argv)
 {
     GLenum type;
@@ -131,7 +142,7 @@ int main(int argc, char **argv)
     type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
     glutInitDisplayMode(type);
 
-    if (glutCreateWindow("First Tri") == GL_FALSE) {
+    if (glutCreateWindow(argv[0]) == GL_FALSE) {
 	exit(1);
     }
 
@@ -141,5 +152,5 @@ int main(int argc, char **argv)
     glutKeyboardFunc(Key);
     glutDisplayFunc(Draw);
     glutMainLoop();
-	return 0;
+    return 0;
 }
diff --git a/progs/xdemos/offset.c b/progs/xdemos/offset.c
index 0ad9147aea..6c5abf383b 100644
--- a/progs/xdemos/offset.c
+++ b/progs/xdemos/offset.c
@@ -47,7 +47,6 @@ PERFORMANCE OF THIS SOFTWARE.
 
 
 #include <GL/glx.h>
-#include <GL/glu.h>
 #include <X11/keysym.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -135,7 +134,7 @@ int main(int argc, char** argv) {
 
     /* set up viewing parameters */
     glMatrixMode(GL_PROJECTION);
-    gluPerspective(20, 1, 10, 20);
+    glFrustum(-1, 1, -1, 1, 6, 20);
     glMatrixMode(GL_MODELVIEW);
     glTranslatef(0, 0, -15);