From bd2f921d782a41a7fd9366435451768eb57df1cd Mon Sep 17 00:00:00 2001
From: Jakob Bornecrantz <jakob@vmware.com>
Date: Sat, 21 Feb 2009 11:58:48 +0100
Subject: trivial: Add tri-viewport

---
 progs/trivial/.gitignore     |   1 +
 progs/trivial/Makefile       |   1 +
 progs/trivial/SConscript     |   1 +
 progs/trivial/tri-viewport.c | 129 +++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 132 insertions(+)
 create mode 100644 progs/trivial/tri-viewport.c

diff --git a/progs/trivial/.gitignore b/progs/trivial/.gitignore
index dadd535591..5159e31aa2 100644
--- a/progs/trivial/.gitignore
+++ b/progs/trivial/.gitignore
@@ -110,6 +110,7 @@ tri-unfilled-tri-lit
 tri-unfilled-userclip
 tri-unfilled-userclip-stip
 tri-userclip
+tri-viewport
 tri-z
 tri-z-eq
 trifan
diff --git a/progs/trivial/Makefile b/progs/trivial/Makefile
index 6ba41a7895..3300fce636 100644
--- a/progs/trivial/Makefile
+++ b/progs/trivial/Makefile
@@ -119,6 +119,7 @@ SOURCES = \
 	tri-unfilled-userclip.c \
 	tri-unfilled.c \
 	tri-userclip.c \
+	tri-viewport.c \
 	tri-z-eq.c \
 	tri-z.c \
 	tri.c \
diff --git a/progs/trivial/SConscript b/progs/trivial/SConscript
index 8a7fb6be30..dc84a0550b 100644
--- a/progs/trivial/SConscript
+++ b/progs/trivial/SConscript
@@ -114,6 +114,7 @@ progs = [
 	'tri-unfilled-userclip',
 	'tri-unfilled',
 	'tri-userclip',
+	'tri-viewport',
 	'tri-z-eq',
 	'tri-z',
 	'tri',
diff --git a/progs/trivial/tri-viewport.c b/progs/trivial/tri-viewport.c
new file mode 100644
index 0000000000..3205b9ee9c
--- /dev/null
+++ b/progs/trivial/tri-viewport.c
@@ -0,0 +1,129 @@
+/*
+ * 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>
+
+GLenum doubleBuffer = 1;
+int win;
+
+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));
+
+   glClearColor(0.3, 0.1, 0.3, 0.0);
+}
+
+static void Reshape(int width, int height)
+{
+   glViewport(width / -2.0, height / -2.0, width, height);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+   switch (key) {
+      case 27:
+         exit(0);
+      default:
+         glutPostRedisplay();
+         return;
+   }
+}
+
+static void Draw(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT); 
+
+   glBegin(GL_TRIANGLES);
+   glColor3f(.8,0,0); 
+   glVertex3f(-0.9,  0.9, -30.0);
+   glColor3f(0,.9,0); 
+   glVertex3f( 0.9,  0.9, -30.0);
+   glColor3f(0,0,.7); 
+   glVertex3f( 0.0, -0.9, -30.0);
+   glEnd();
+
+   glFlush();
+
+   if (doubleBuffer) {
+      glutSwapBuffers();
+   }
+}
+
+static GLenum Args(int argc, char **argv)
+{
+   GLint i;
+
+   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);
+
+   win = glutCreateWindow(*argv);
+   if (!win) {
+      exit(1);
+   }
+
+   Init();
+
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutDisplayFunc(Draw);
+   glutMainLoop();
+   return 0;
+}
-- 
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