gallium/u_blitter: set a more sane viewport-state

This actually corresponds to legal GL depth-ranges, because depth-clear
values are always in the 0..1 range in OpenGL.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/gallium/auxiliary/util/u_blitter.c b/src/gallium/auxiliary/util/u_blitter.c
index 5976d72937b24b969b0324fc9bcee5a8dd64a6ef..5400e0a4b67f4573cdb46ae9709428737df633ac 100644 (file)
--- a/src/gallium/auxiliary/util/u_blitter.c
+++ b/src/gallium/auxiliary/util/u_blitter.c
@@ -334,8 +334,10 @@ struct blitter_context *util_blitter_create(struct pipe_context *pipe)
       pipe->screen->get_param(pipe->screen, PIPE_CAP_TGSI_VS_LAYER_VIEWPORT);
 
    /* set invariant vertex coordinates */
-   for (i = 0; i < 4; i++)
+   for (i = 0; i < 4; i++) {
+      ctx->vertices[i][0][2] = 0; /*v.z*/
       ctx->vertices[i][0][3] = 1; /*v.w*/
+   }
 
    return &ctx->base;
 }
@@ -806,17 +808,14 @@ static void blitter_set_rectangle(struct blitter_context_priv *ctx,
    ctx->vertices[3][0][0] = (float)x1 / ctx->dst_width * 2.0f - 1.0f; /*v3.x*/
    ctx->vertices[3][0][1] = (float)y2 / ctx->dst_height * 2.0f - 1.0f; /*v3.y*/
 
-   for (i = 0; i < 4; i++)
-      ctx->vertices[i][0][2] = depth; /*z*/
-
    /* viewport */
    struct pipe_viewport_state viewport;
    viewport.scale[0] = 0.5f * ctx->dst_width;
    viewport.scale[1] = 0.5f * ctx->dst_height;
-   viewport.scale[2] = 1.0f;
+   viewport.scale[2] = 0.0f;
    viewport.translate[0] = 0.5f * ctx->dst_width;
    viewport.translate[1] = 0.5f * ctx->dst_height;
-   viewport.translate[2] = 0.0f;
+   viewport.translate[2] = depth;
    ctx->base.pipe->set_viewport_states(ctx->base.pipe, 0, 1, &viewport);
 }