From: Brian <brian.paul@tungstengraphics.com>
Date: Wed, 17 Oct 2007 17:24:06 +0000 (-0600)
Subject: Fix viewport Z scale/bias to get the right Z values from drawing the quad.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2dd27cfdd981b3b2c973066082b1168c4cb6f42c;p=mesa.git

Fix viewport Z scale/bias to get the right Z values from drawing the quad.
---

diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 4f269ed3f7a..c0ea1a4bf6c 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -326,7 +326,7 @@ clear_with_quad(GLcontext *ctx,
       pipe->bind_depth_stencil_state(pipe, cso->data);
    }
 
-   /* setup state: nothing */
+   /* rasterizer state: nothing */
    {
       struct pipe_rasterizer_state raster;
       const struct cso_rasterizer *cso;
@@ -367,11 +367,11 @@ clear_with_quad(GLcontext *ctx,
       struct pipe_viewport_state vp;
       vp.scale[0] =  0.5 * width;
       vp.scale[1] = -0.5 * height;
-      vp.scale[2] = 0.5;
+      vp.scale[2] = 1.0;
       vp.scale[3] = 1.0;
       vp.translate[0] = 0.5 * width;
       vp.translate[1] = 0.5 * height;
-      vp.translate[2] = 0.5;
+      vp.translate[2] = 0.0;
       vp.translate[3] = 0.0;
       pipe->set_viewport_state(pipe, &vp);
    }
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c
index 97d4f41ed9d..9031ef46dfe 100644
--- a/src/mesa/state_tracker/st_cb_drawpixels.c
+++ b/src/mesa/state_tracker/st_cb_drawpixels.c
@@ -570,11 +570,11 @@ draw_textured_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z,
       struct pipe_viewport_state vp;
       vp.scale[0] =  0.5 * width;
       vp.scale[1] = -0.5 * height;
-      vp.scale[2] = 0.5;
+      vp.scale[2] = 1.0;
       vp.scale[3] = 1.0;
       vp.translate[0] = 0.5 * width;
       vp.translate[1] = 0.5 * height;
-      vp.translate[2] = 0.5;
+      vp.translate[2] = 0.0;
       vp.translate[3] = 0.0;
       pipe->set_viewport_state(pipe, &vp);
    }