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-rw-r--r--progs/tests/zreaddraw.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/progs/tests/zreaddraw.c b/progs/tests/zreaddraw.c
index 7dfed20cfb9..7740695bb66 100644
--- a/progs/tests/zreaddraw.c
+++ b/progs/tests/zreaddraw.c
@@ -58,6 +58,10 @@ static void Display(void)
printf("Depth value range: [%f, %f]\n", min, max);
}
+ /* Draw the Z image as luminance above original rendering */
+ glWindowPos2i(0, 100);
+ glDrawPixels(100, 100, GL_LUMINANCE, depthType, depth);
+
if (TestPacking) {
glPixelStorei(GL_PACK_ROW_LENGTH, 0);
glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
@@ -100,6 +104,7 @@ static void Display(void)
glReadPixels(100, 0, 400, 400, GL_DEPTH_COMPONENT, GL_FLOAT, depth2);
/* draw as luminance */
glPixelZoom(1.0, 1.0);
+ glWindowPos2i(100, 0);
glDrawPixels(400, 400, GL_LUMINANCE, GL_FLOAT, depth2);
glutSwapBuffers();