progs/trivial: add dlist-recursive-call

When one display list calls another display list, it is possible
that the calling display list makes state-changes or other actions which
invalidate any attempt at caching or state-change elimination in the
calling list.

This test exercises one such case, where the called list consists of just
a single glShadeModel() call.

diff --git a/progs/trivial/Makefile b/progs/trivial/Makefile
index ec67d11364790cddb7c44ad193146c5e25158a1e..0209c509503382e2f225b62998da7310fdd42e5a 100644 (file)
--- a/progs/trivial/Makefile
+++ b/progs/trivial/Makefile
@@ -20,6 +20,7 @@ SOURCES = \
        clear.c \
        dlist-dangling.c \
        dlist-tri-flat-tri.c \
+       dlist-recursive-call.c \
        dlist-edgeflag-dangling.c \
        dlist-edgeflag.c \
        dlist-degenerate.c \

diff --git a/progs/trivial/dlist-recursive-call.c b/progs/trivial/dlist-recursive-call.c
new file mode 100644 (file)
index 0000000..fe06b2b
--- /dev/null
+++ b/progs/trivial/dlist-recursive-call.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that (i) the above copyright notices and this permission notice appear in
+ * all copies of the software and related documentation, and (ii) the name of
+ * Silicon Graphics may not be used in any advertising or
+ * publicity relating to the software without the specific, prior written
+ * permission of Silicon Graphics.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
+ * ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#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;
+GLint first_list, list;
+
+static void Init(void)
+{
+   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+   fflush(stderr);
+
+   glClearColor(0.0, 0.0, 1.0, 0.0);
+
+   /* First list will disrupt state which might potentially be
+    * short-circuited in calling list:
+    */
+   first_list = glGenLists(1);
+   glNewList(first_list, GL_COMPILE); 
+   glShadeModel( GL_SMOOTH );
+   glEndList();
+
+
+   /* List that looks like it might have redundant state:
+    */
+   list = glGenLists(1);
+   glNewList(list, GL_COMPILE); 
+
+   glBegin(GL_TRIANGLES);
+   glColor3f(0,0,.7);
+   glVertex3f( 0.9, -0.9, -30.0);
+   glColor3f(.8,0,0);
+   glVertex3f( 0.9,  0.9, -30.0);
+   glColor3f(0,.9,0);
+   glVertex3f(-0.9,  0.0, -30.0);
+   glEnd();
+
+   glShadeModel( GL_FLAT );
+   glBegin(GL_TRIANGLES);
+   glColor3f(0,0,.7);
+   glVertex3f( -0.9,  0.9, -30.0);
+   glColor3f(0,.9,0);
+   glVertex3f( -0.9, -0.9, -30.0);
+   glColor3f(.8,0,0);
+   glVertex3f(  0.9,  0.0, -30.0);
+   glEnd();
+
+   glCallList( first_list );
+
+   /* Do a quick begin/end to ensure we are not inside a dangling
+    * primitive from the called list:
+    */
+   glBegin( GL_POINTS );
+   glEnd();
+
+   /* This statechange is NOT redundant:
+    */
+   glShadeModel( GL_FLAT );
+   glBegin(GL_TRIANGLES);
+   glColor3f(1,0,0);
+   glVertex3f( -0.5,  0.5, -30.0);
+   glColor3f(0,1,0);
+   glVertex3f( -0.5, -0.5, -30.0);
+   glColor3f(0,0,1);
+   glVertex3f(  0.5,  0.0, -30.0);
+   glEnd();
+
+   glEndList();
+}
+
+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);
+    glMatrixMode(GL_MODELVIEW);
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+
+    switch (key) {
+      case 27:
+       exit(1);
+      default:
+       return;
+    }
+
+    glutPostRedisplay();
+}
+
+
+
+
+static void Draw(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT); 
+
+   glShadeModel( GL_SMOOTH );
+   glCallList(list);
+
+   glFlush();
+
+   if (doubleBuffer) {
+      glutSwapBuffers();
+   }
+}
+
+static GLenum Args(int argc, char **argv)
+{
+    GLint i;
+
+    doubleBuffer = GL_FALSE;
+
+    for (i = 1; i < argc; i++) {
+        if (strcmp(argv[i], "-sb") == 0) {
+           doubleBuffer = GL_FALSE;
+       } else if (strcmp(argv[i], "-db") == 0) {
+           doubleBuffer = GL_TRUE;
+       } else {
+           fprintf(stderr, "%s (Bad option).\n", argv[i]);
+           return GL_FALSE;
+       }
+    }
+    return GL_TRUE;
+}
+
+int main(int argc, char **argv)
+{
+    GLenum type;
+
+    glutInit(&argc, argv);
+
+    if (Args(argc, argv) == GL_FALSE) {
+       exit(1);
+    }
+
+    glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
+
+    type = GLUT_RGB | GLUT_ALPHA;
+    type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+    glutInitDisplayMode(type);
+
+    if (glutCreateWindow(*argv) == GL_FALSE) {
+       exit(1);
+    }
+
+    Init();
+
+    glutReshapeFunc(Reshape);
+    glutKeyboardFunc(Key);
+    glutDisplayFunc(Draw);
+    glutMainLoop();
+       return 0;
+}