commit b7693ee5594e13f56a83230ce6ca61f23f1b5343
author Brian <brian.paul@tungstengraphics.com> Mon Aug 13 13:57:31 2007 -0600
committer Brian <brian.paul@tungstengraphics.com> Mon Aug 13 14:00:03 2007 -0600
tree abb464cde702532c6c75cb5cc4ef243a2853a710
parent 21b9b8b74ec0975296d22493254875c0deb7b6da

Draw white square in lower-left corner to test orientation

progs/trivial/readpixels.c

diff --git a/progs/trivial/readpixels.c b/progs/trivial/readpixels.c
index b1f04f8..65fb81e 100644
--- a/progs/trivial/readpixels.c
+++ b/progs/trivial/readpixels.c
@@ -57,6 +57,14 @@
    glVertex3f( 0.0,  0.9, -30.0);
    glEnd();
 
+   glBegin(GL_QUADS);
+   glColor3f(1, 1, 1);
+   glVertex2f(-1.0, -1.0);
+   glVertex2f(-0.9, -1.0);
+   glVertex2f(-0.9, -0.9);
+   glVertex2f(-1.0, -0.9);
+   glEnd();
+
    glReadPixels(0, 0, Width, Height, GL_RGBA, GL_FLOAT, image);
    printf("Pixel(0,0) = %f, %f, %f, %f\n",
           image[0], image[1], image[2], image[3]);