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progs/tests: disable depth test for second glDrawPixels

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We don't want to z-test that glDrawPixels.  Also, set the raster color to
red when drawing GL_DEPTH_COMPONENT image to aid in debugging.
This commit is contained in:
Brian Paul
2009-08-31 14:56:34 -06:00
parent 18656201ef
commit b3232e9280
1 changed files with 5 additions and 1 deletions
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6
progs/tests/zreaddraw.c
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@@ -24,6 +24,8 @@ static void Display(void)
glClearColor(0.5, 0.5, 0.5, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
/* draw a sphere */
glViewport(0, 0, 100, 100);
glMatrixMode(GL_PROJECTION);
@@ -46,9 +48,12 @@ static void Display(void)
/* draw depth image with scaling (into z buffer) */
glPixelZoom(4.0, 4.0);
glColor4f(1, 0, 0, 0);
glWindowPos2i(100, 0);
glDrawPixels(100, 100, GL_DEPTH_COMPONENT, GL_FLOAT, depth);
glDisable(GL_DEPTH_TEST);
/* read back scaled depth image */
glReadPixels(100, 0, 400, 400, GL_DEPTH_COMPONENT, GL_FLOAT, depth2);
/* draw as luminance */
@@ -96,7 +101,6 @@ static void Init(void)
glLightfv(GL_LIGHT0, GL_POSITION, pos);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
}