progs/tests: new zbitmap.c test to exercize Z testing of glBitmap

1 files changed, 127 insertions, 0 deletions

diff --git a/progs/tests/zbitmap.c b/progs/tests/zbitmap.c
new file mode 100644
index 00000000000..45cb7543c2a
--- /dev/null
+++ b/progs/tests/zbitmap.c
@@ -0,0 +1,127 @@
+/*
+ * Test Z values of glBitmap.
+ * Brian Paul
+ * 19 Feb 2010
+ */
+
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <GL/glew.h>
+#include <GL/glut.h>
+
+
+static GLint Win = 0;
+
+
+static void
+PrintString(const char *s)
+{
+   while (*s) {
+      glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
+      s++;
+   }
+}
+
+
+static void
+Display(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-3.0, 3.0, -3.0, 3.0, -2.0, 2.0);
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+
+   glColor3f(1, 1, 1);
+   glRasterPos2f(-2.0, 2.6);
+   PrintString("Z = -1.0");
+   glRasterPos2f(-0.5, 2.6);
+   PrintString("Z = 0.0");
+   glRasterPos2f(1.0, 2.6);
+   PrintString("Z = 1.0");
+
+   glColor3f(0, 0.4, 0.6);
+   glBegin(GL_QUADS);
+   glVertex3f(-2.0, -2.5, -1);
+   glVertex3f(-1.0, -2.5, -1);
+   glVertex3f(-1.0, 2.5, -1);
+   glVertex3f(-2.0, 2.5, -1);
+
+   glVertex3f(-0.5, -2.5, 0);
+   glVertex3f(0.5, -2.5, 0);
+   glVertex3f(0.5, 2.5, 0);
+   glVertex3f(-0.5, 2.5, 0);
+
+   glVertex3f(1.0, -2.5, 1);
+   glVertex3f(2.0, -2.5, 1);
+   glVertex3f(2.0, 2.5, 1);
+   glVertex3f(1.0, 2.5, 1);
+   glEnd();
+
+   glColor3f(1, 1, 1);
+
+   glRasterPos3f(-2.0, -1, -1.0);
+   PrintString("This is a bitmap string drawn at z = -1.0");
+
+   glRasterPos3f(-2.0, 0, 0.0);
+   PrintString("This is a bitmap string drawn at z = 0.0");
+
+   glRasterPos3f(-2.0, 1, 1.0);
+   PrintString("This is a bitmap string drawn at z = 1.0");
+
+   glRasterPos3f(-1.5, -2.8, 0.0);
+   PrintString("GL_DEPTH_FUNC = GL_LEQUAL");
+
+   glutSwapBuffers();
+}
+
+
+static void
+Reshape(int width, int height)
+{
+   glViewport(0, 0, width, height);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   if (key == 27) {
+      glutDestroyWindow(Win);
+      exit(0);
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+Init(void)
+{
+   glClearColor(0.25, 0.25, 0.25, 0.0);
+   glDepthFunc(GL_LEQUAL);
+   glEnable(GL_DEPTH_TEST);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInitWindowSize(400, 400);
+   glutInit(&argc, argv);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+   Win = glutCreateWindow(argv[0]);
+   glewInit();
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutDisplayFunc(Display);
+   Init();
+   glutMainLoop();
+   return 0;
+}