commit 69654f0918f0fb46466b81296e4030a9a63c6e4e
author Erik Faye-Lund <erik.faye-lund@collabora.com> Mon Sep 28 21:37:38 2020 +0200
committer Marge Bot <eric+marge@anholt.net> Tue Sep 29 10:14:39 2020 +0000
tree bcc27e73955a3421b87e2c6b0adc4f86a1e13c74
parent a21e1e615cd5a9bce4391914fe0d4cec7acc3552

gallium/util: fix texture-coordinates for stencil-fallback

Set up texture coordinates for the stencil-fallback blit code. This
worked in the orignal NIR code, but accidentally broke when rewriting to
use TGSI, and my test-case had a constant colored stencil buffer.

Fixes: e8a40715a8b ("gallium/util: add blitter-support for stencil-fallback")
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6898>

src/gallium/auxiliary/util/u_blitter.c

diff --git a/src/gallium/auxiliary/util/u_blitter.c b/src/gallium/auxiliary/util/u_blitter.c
index cb810af..25d9ad3 100644
--- a/src/gallium/auxiliary/util/u_blitter.c
+++ b/src/gallium/auxiliary/util/u_blitter.c
@@ -2875,6 +2875,13 @@
    struct pipe_stencil_ref sr = { { (1u << stencil_bits) - 1 } };
    pipe->set_stencil_ref(pipe, &sr);
 
+   union blitter_attrib coord;
+   get_texcoords(src_view, src->width0, src->height0,
+                 srcbox->x, srcbox->y,
+                 srcbox->x + srcbox->width, srcbox->y + srcbox->height,
+                 srcbox->z, 0, true,
+                 &coord);
+
    for (int i = 0; i < stencil_bits; ++i) {
       uint32_t mask = 1 << i;
       struct pipe_constant_buffer cb = {
@@ -2890,7 +2897,9 @@
       blitter->draw_rectangle(blitter, ctx->velem_state, get_vs_passthrough_pos,
                               dstx, dsty,
                               dstx + srcbox->width, dsty + srcbox->height,
-                              0, stencil_bits, UTIL_BLITTER_ATTRIB_NONE, NULL);
+                              0, stencil_bits,
+                              UTIL_BLITTER_ATTRIB_TEXCOORD_XYZW,
+                              &coord);
    }
 
    util_blitter_restore_vertex_states(blitter);