tri-2101010: add a simple demo for GL_ARB_vertex_type_2_10_10_10_rev

3 files changed, 164 insertions, 0 deletions

diff --git a/src/trivial/CMakeLists.txt b/src/trivial/CMakeLists.txt
index 1bff1c55..26598a06 100644
--- a/src/trivial/CMakeLists.txt
+++ b/src/trivial/CMakeLists.txt
@@ -104,6 +104,7 @@ set (targets
 	readpixels
 	sub-tex
 	tex-quads
+	tri-2101010
 	tri-alpha
 	tri-alpha-tex
 	tri-array-interleaved
diff --git a/src/trivial/Makefile.am b/src/trivial/Makefile.am
index bc3da72a..844eb585 100644
--- a/src/trivial/Makefile.am
+++ b/src/trivial/Makefile.am
@@ -112,6 +112,7 @@ bin_PROGRAMS = \
 	quad-unfilled-clip \
 	quad-unfilled-stipple \
 	readpixels \
+	tri-2101010 \
 	tri-alpha \
 	tri-alpha-tex \
 	tri-array-interleaved \
diff --git a/src/trivial/tri-2101010.c b/src/trivial/tri-2101010.c
new file mode 100644
index 00000000..bbdab193
--- /dev/null
+++ b/src/trivial/tri-2101010.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2011 David Airlie
+ *
+ * Based on tri.c which is:
+ * 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/glew.h>
+#include <GL/glut.h>
+
+
+#define CI_OFFSET_1 16
+#define CI_OFFSET_2 32
+
+
+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));
+   fflush(stderr);
+
+   if (!glutExtensionSupported("GL_ARB_vertex_type_2_10_10_10_rev")){
+     fprintf(stderr,"requires ARB_vertex_type_2_10_10_10_rev\n");
+     exit(1);
+   }
+
+   glClearColor(0.3, 0.1, 0.3, 0.0);
+}
+
+static void Reshape(int width, int height)
+{
+
+   glViewport(0, 0, (GLint)width, (GLint)height);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-100.0, 100.0, -100.0, 100.0, -50.0, 1000.0);
+   glMatrixMode(GL_MODELVIEW);
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+   switch (key) {
+      case 27:
+         glutDestroyWindow(win);
+         exit(0);
+      default:
+         glutPostRedisplay();
+         return;
+   }
+}
+
+#define i32to10(x) ((x) > 0 ? (x & 0x1ff) : 1024-(abs((x))& 0x1ff))
+#define i32to2(x) ((x) > 0 ? (x & 0x1) : 3-abs((x)))
+
+static uint32_t iconv(int x, int y, int z, int w)
+{
+	uint32_t val;
+
+	val = i32to10(x);
+	val |= i32to10(y) << 10;
+	val |= i32to10(z) << 20;
+	val |= i32to2(w) << 30;
+	return val;
+}
+#define conv(x,y,z,w) (((x) & 0x3ff) | ((y) & 0x3ff) << 10 | ((z) & 0x3ff)<< 20 | ((w) & 0x3) << 30)
+
+static void Draw(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT); 
+
+   glBegin(GL_TRIANGLES);
+   glColorP3ui(GL_UNSIGNED_INT_2_10_10_10_REV, conv(820, 0, 0, 0));
+   glVertexP3ui(GL_INT_2_10_10_10_REV, iconv(-90, -90, -30, 0));
+   glColorP3ui(GL_UNSIGNED_INT_2_10_10_10_REV, conv(0, 921, 0, 0));
+   glVertexP3ui(GL_INT_2_10_10_10_REV, iconv(90, -90, -30, 0));
+   glColorP3ui(GL_UNSIGNED_INT_2_10_10_10_REV, conv(0, 0, 716, 0));
+   glVertexP3ui(GL_INT_2_10_10_10_REV, iconv(0, 90, -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);
+   }
+
+   glewInit();
+   Init();
+
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutDisplayFunc(Draw);
+   glutMainLoop();
+   return 0;
+}