Demos (master): line-sample: use GL_LINE_STRIP instead of GL_LINE_LOOP

[Brian Paul]

Module: Demos
Branch: master
Commit: 0dfa8f7003bbf7296b0b0b55fdadde0d0b41f373
URL:    http://cgit.freedesktop.org/mesa/demos/commit/?id=0dfa8f7003bbf7296b0b0b55fdadde0d0b41f373

Author: Brian Paul <brianp at vmware.com>
Date:   Wed Feb 25 13:19:04 2015 -0700

line-sample: use GL_LINE_STRIP instead of GL_LINE_LOOP

The svga driver (and maybe others) decompose line loops into disjoint
lines so the line stipple counter isn't preserved from one segment to
the next.  Use GL_LINE_STRIP instead to work around that.

---

 src/tests/line-sample.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/tests/line-sample.c b/src/tests/line-sample.c
index ae5e056..70709b4 100644
--- a/src/tests/line-sample.c
+++ b/src/tests/line-sample.c
@@ -60,8 +60,8 @@ draw_line_sample(GLboolean smooth, GLboolean stipple, GLfloat width)
    glEnd();
 
    /* circle */
-   glBegin(GL_LINE_LOOP);
-   for (i = 0; i < 360; i += 10) {
+   glBegin(GL_LINE_STRIP);
+   for (i = 0; i <= 360; i += 10) {
       float x = r2 * cos(i * M_PI / 180.0);
       float y = r2 * sin(i * M_PI / 180.0);
 
@@ -70,11 +70,12 @@ draw_line_sample(GLboolean smooth, GLboolean stipple, GLfloat width)
    glEnd();
 
    /* box */
-   glBegin(GL_LINE_LOOP);
+   glBegin(GL_LINE_STRIP);
    glVertex2f(-r3, -r3);
    glVertex2f( r3, -r3);
    glVertex2f( r3,  r3);
    glVertex2f(-r3,  r3);
+   glVertex2f(-r3, -r3);
    glEnd();
 }