From: Marek Olšák <maraeo@gmail.com>
Date: Tue, 2 Mar 2010 01:37:45 +0000 (+0100)
Subject: util/blitter: Fix the viewport transformation for Z coordinates
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ff9ddf4d39be9e36d3e1dd9e10e889efa40dfb1e;p=mesa.git

util/blitter: Fix the viewport transformation for Z coordinates

When clearing buffers, the depth is specified in the range [0, 1]
and should be passed through blitter "as is".
---

diff --git a/src/gallium/auxiliary/util/u_blitter.c b/src/gallium/auxiliary/util/u_blitter.c
index f93c69d1938..0ba09d33bfc 100644
--- a/src/gallium/auxiliary/util/u_blitter.c
+++ b/src/gallium/auxiliary/util/u_blitter.c
@@ -320,11 +320,11 @@ static void blitter_set_rectangle(struct blitter_context_priv *ctx,
    /* viewport */
    ctx->viewport.scale[0] = 0.5f * width;
    ctx->viewport.scale[1] = 0.5f * height;
-   ctx->viewport.scale[2] = 0.5f;
+   ctx->viewport.scale[2] = 1.0f;
    ctx->viewport.scale[3] = 1.0f;
    ctx->viewport.translate[0] = 0.5f * width;
    ctx->viewport.translate[1] = 0.5f * height;
-   ctx->viewport.translate[2] = 0.5f;
+   ctx->viewport.translate[2] = 0.0f;
    ctx->viewport.translate[3] = 0.0f;
    ctx->pipe->set_viewport_state(ctx->pipe, &ctx->viewport);