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-rw-r--r--src/mesa/state_tracker/st_cb_clear.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 4bfa8d75aa9..2c1414e480e 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -173,6 +173,9 @@ draw_quad(struct st_context *st,
return;
}
+ /* Convert Z from [0,1] to [-1,1] range */
+ z = z * 2.0f - 1.0f;
+
/* positions */
vertices[0][0][0] = x0;
vertices[0][0][1] = y0;
@@ -319,11 +322,11 @@ clear_with_quad(struct gl_context *ctx, unsigned clear_buffers)
struct pipe_viewport_state vp;
vp.scale[0] = 0.5f * fb_width;
vp.scale[1] = fb_height * (invert ? -0.5f : 0.5f);
- vp.scale[2] = 1.0f;
+ vp.scale[2] = 0.5f;
vp.scale[3] = 1.0f;
vp.translate[0] = 0.5f * fb_width;
vp.translate[1] = 0.5f * fb_height;
- vp.translate[2] = 0.0f;
+ vp.translate[2] = 0.5f;
vp.translate[3] = 0.0f;
cso_set_viewport(st->cso_context, &vp);
}