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authorBrian Paul <brianp@vmware.com>2009-09-08 16:47:30 -0600
committerBrian Paul <brianp@vmware.com>2009-09-08 16:47:30 -0600
commit8947cf67288ab9a8bf87e9029d3fc1d4073cc88b (patch)
tree0a6f69e5d71df0cd148c9cdb7314310f112f3eec /progs/tests
parentf78eafcacb67de3f2cd035335c4ecd98e21a8209 (diff)
progs/tests: added Z invert option
Diffstat (limited to 'progs/tests')
-rw-r--r--progs/tests/zreaddraw.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/progs/tests/zreaddraw.c b/progs/tests/zreaddraw.c
index 8839e108360..0821d5fb357 100644
--- a/progs/tests/zreaddraw.c
+++ b/progs/tests/zreaddraw.c
@@ -12,6 +12,7 @@
#include <GL/glut.h>
static GLint WinWidth = 500, WinHeight = 500;
+static GLboolean Invert = GL_FALSE;
static void Display(void)
@@ -50,7 +51,15 @@ static void Display(void)
glPixelZoom(4.0, 4.0);
glColor4f(1, 0, 0, 0);
glWindowPos2i(100, 0);
+ if (Invert) {
+ glPixelTransferf(GL_DEPTH_SCALE, -1.0);
+ glPixelTransferf(GL_DEPTH_BIAS, 1.0);
+ }
glDrawPixels(100, 100, GL_DEPTH_COMPONENT, GL_FLOAT, depth);
+ if (Invert) {
+ glPixelTransferf(GL_DEPTH_SCALE, 1.0);
+ glPixelTransferf(GL_DEPTH_BIAS, 0.0);
+ }
glDisable(GL_DEPTH_TEST);
@@ -77,6 +86,9 @@ static void Key(unsigned char key, int x, int y)
(void) x;
(void) y;
switch (key) {
+ case 'i':
+ Invert = !Invert;
+ break;
case 27:
exit(0);
break;