test program for NV_vertex_program and evaluators

diff --git a/progs/tests/vpeval.c b/progs/tests/vpeval.c
new file mode 100644 (file)
index 0000000..c35906d
--- /dev/null
+++ b/progs/tests/vpeval.c
@@ -0,0 +1,228 @@
+/*
+ * Vertex program evaluators test.
+ * Based on book/bezmesh.c
+ *
+ * Brian Paul
+ * 22 June 2002
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+
+
+/*
+ * Transform position by modelview/projection.
+ * Square incoming color.
+ */
+static const char prog[] = 
+"!!VP1.0\n"
+
+"# Typical modelview/projection\n"
+"DP4   o[HPOS].x, c[0], v[OPOS] ;      # object x MVP -> clip\n"
+"DP4   o[HPOS].y, c[1], v[OPOS] ;\n"
+"DP4   o[HPOS].z, c[2], v[OPOS] ;\n"
+"DP4   o[HPOS].w, c[3], v[OPOS] ;\n"
+
+"MOV   R0, v[COL0];\n       # square the color\n"
+"MUL   R0, R0, R0;\n"
+"MOV   o[COL0], R0;\n       # store output color\n"
+
+"END";
+
+
+static int program = 1;
+
+
+GLfloat ctrlpoints[4][4][4] =
+{
+    {
+        {-1.5, -1.5, 4.0, 1.0},
+        {-0.5, -1.5, 2.0, 1.0},
+        {0.5, -1.5, -1.0, 1.0},
+        {1.5, -1.5, 2.0, 1.0}},
+    {
+        {-1.5, -0.5, 1.0, 1.0},
+        {-0.5, -0.5, 3.0, 1.0},
+        {0.5, -0.5, 0.0, 1.0},
+        {1.5, -0.5, -1.0, 1.0}},
+    {
+        {-1.5, 0.5, 4.0, 1.0},
+        {-0.5, 0.5, 0.0, 1.0},
+        {0.5, 0.5, 3.0, 1.0},
+        {1.5, 0.5, 4.0, 1.0}},
+    {
+        {-1.5, 1.5, -2.0, 1.0},
+        {-0.5, 1.5, -2.0, 1.0},
+        {0.5, 1.5, 0.0, 1.0},
+        {1.5, 1.5, -1.0, 1.0}}
+};
+
+/*
+ * +-------------+
+ * |green        |yellow
+ * |             |
+ * |             |
+ * |black        |red
+ * +-------------+
+ */
+GLfloat colorPoints[4][4][4] =
+{
+    {
+        {0.0, 0.0, 0.0, 1.0},
+        {0.3, 0.0, 0.0, 1.0},
+        {0.6, 0.0, 0.0, 1.0},
+        {1.0, 0.0, 0.0, 1.0}},
+    {
+        {0.0, 0.3, 0.0, 1.0},
+        {0.3, 0.3, 0.0, 1.0},
+        {0.6, 0.3, 0.0, 1.0},
+        {1.0, 0.3, 0.0, 1.0}},
+    {
+        {0.0, 0.6, 0.0, 1.0},
+        {0.3, 0.6, 0.0, 1.0},
+        {0.6, 0.6, 0.0, 1.0},
+        {1.0, 0.6, 0.0, 1.0}},
+    {
+        {0.0, 1.0, 0.0, 1.0},
+        {0.3, 1.0, 0.0, 1.0},
+        {0.6, 1.0, 0.0, 1.0},
+        {1.0, 1.0, 0.0, 1.0}}
+};
+
+
+void
+initlights(void)
+{
+    GLfloat ambient[] = {0.2, 0.2, 0.2, 1.0};
+    GLfloat position[] = {0.0, 0.0, 2.0, 1.0};
+    GLfloat mat_diffuse[] = {0.6, 0.6, 0.6, 1.0};
+    GLfloat mat_specular[] = {1.0, 1.0, 1.0, 1.0};
+    GLfloat mat_shininess[] = {50.0};
+
+#if 0 /* no lighting for now */
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
+
+    glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
+    glLightfv(GL_LIGHT0, GL_POSITION, position);
+
+    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
+    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
+    glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
+#endif
+}
+
+void
+display(void)
+{
+   glClearColor(.3, .3, .3, 0);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glPushMatrix();
+#if 1
+    glRotatef(85.0, 1.0, 1.0, 1.0);
+#endif
+    glEvalMesh2(GL_FILL, 0, 8, 0, 8);
+    glPopMatrix();
+    glFlush();
+}
+
+void
+myinit(int argc, char *argv[])
+{
+    glClearColor(0.0, 0.0, 0.0, 1.0);
+    glEnable(GL_DEPTH_TEST);
+
+    initlights();       /* for lighted version only */
+
+    glMapGrid2f(8, 0.0, 1.0, 8, 0.0, 1.0);
+
+    if (argc > 1)
+       program = 0;
+
+    printf("Using vertex program attribs? %s\n", program ? "yes" : "no");
+
+    if (!program) {
+        glMap2f(GL_MAP2_VERTEX_4,
+                0.0, 1.0, 4, 4,
+                0.0, 1.0, 16, 4, &ctrlpoints[0][0][0]);
+        glMap2f(GL_MAP2_COLOR_4,
+                0.0, 1.0, 4, 4,
+                0.0, 1.0, 16, 4, &colorPoints[0][0][0]);
+        glEnable(GL_MAP2_VERTEX_4);
+        glEnable(GL_MAP2_COLOR_4);
+        /*
+        glEnable(GL_AUTO_NORMAL);
+        glEnable(GL_NORMALIZE);
+        */
+    }
+    else {
+        glMap2f(GL_MAP2_VERTEX_ATTRIB0_4_NV,
+                0.0, 1.0, 4, 4,
+                0.0, 1.0, 16, 4, &ctrlpoints[0][0][0]);
+        glMap2f(GL_MAP2_VERTEX_ATTRIB3_4_NV,
+                0.0, 1.0, 4, 4,
+                0.0, 1.0, 16, 4, &colorPoints[0][0][0]);
+        glEnable(GL_MAP2_VERTEX_ATTRIB0_4_NV);
+        glEnable(GL_MAP2_VERTEX_ATTRIB3_4_NV);
+
+        /*
+        glEnable(GL_AUTO_NORMAL);
+        glEnable(GL_NORMALIZE);
+        */
+
+        /* vertex program init */
+        glLoadProgramNV(GL_VERTEX_PROGRAM_NV, 1,
+                        strlen(prog), (const GLubyte *) prog);
+        assert(glIsProgramNV(1));
+        glBindProgramNV(GL_VERTEX_PROGRAM_NV, 1);
+
+        /* track matrices */
+        glTrackMatrixNV(GL_VERTEX_PROGRAM_NV, 0, GL_MODELVIEW_PROJECTION_NV, GL_IDENTITY_NV);
+        glEnable(GL_VERTEX_PROGRAM_NV);
+    }
+}
+
+void
+myReshape(int w, int h)
+{
+    glViewport(0, 0, w, h);
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    if (w <= h)
+        glOrtho(-4.0, 4.0, -4.0 * (GLfloat) h / (GLfloat) w,
+            4.0 * (GLfloat) h / (GLfloat) w, -4.0, 4.0);
+    else
+        glOrtho(-4.0 * (GLfloat) w / (GLfloat) h,
+            4.0 * (GLfloat) w / (GLfloat) h, -4.0, 4.0, -4.0, 4.0);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+}
+
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
+int
+main(int argc, char **argv)
+{
+    glutInit(&argc, argv);
+    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
+    glutInitWindowPosition(0, 0);
+    glutCreateWindow(argv[0]);
+    myinit(argc, argv);
+    glutReshapeFunc(myReshape);
+    glutDisplayFunc(display);
+    glutKeyboardFunc(key);
+    glutMainLoop();
+    return 0;             /* ANSI C requires main to return int. */
+}