From 7cd6a6cc995407a19254401511dafd943299b8ac Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Wed, 21 Jul 2010 16:48:45 -0600
Subject: [PATCH] softpipe: add missing support for PIPE_FORMAT_S8_USCALED
 surfaces

And remove checks of surface depth bits.  The state tracker should
not turn on depth/stencil testing if the framebuffer doesn't have
depth/stencil.
---
 .../drivers/softpipe/sp_quad_depth_test.c     | 40 +++++++++----------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/src/gallium/drivers/softpipe/sp_quad_depth_test.c b/src/gallium/drivers/softpipe/sp_quad_depth_test.c
index 72117c233e5..5590d408929 100644
--- a/src/gallium/drivers/softpipe/sp_quad_depth_test.c
+++ b/src/gallium/drivers/softpipe/sp_quad_depth_test.c
@@ -82,7 +82,7 @@ get_depth_stencil_values( struct depth_data *data,
          data->bzzzz[j] = tile->data.depth32[y][x] & 0xffffff;
          data->stencilVals[j] = tile->data.depth32[y][x] >> 24;
       }
-   break;
+      break;
    case PIPE_FORMAT_X8Z24_UNORM:
    case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
       for (j = 0; j < QUAD_SIZE; j++) {
@@ -92,6 +92,14 @@ get_depth_stencil_values( struct depth_data *data,
          data->stencilVals[j] = tile->data.depth32[y][x] & 0xff;
       }
       break;
+   case PIPE_FORMAT_S8_USCALED:
+      for (j = 0; j < QUAD_SIZE; j++) {
+         int x = quad->input.x0 % TILE_SIZE + (j & 1);
+         int y = quad->input.y0 % TILE_SIZE + (j >> 1);
+         data->bzzzz[j] = 0;
+         data->stencilVals[j] = tile->data.stencil8[y][x];
+      }
+      break;
    default:
       assert(0);
    }
@@ -227,6 +235,14 @@ write_depth_stencil_values( struct depth_data *data,
          tile->data.depth32[y][x] = data->bzzzz[j] << 8;
       }
       break;
+   case PIPE_FORMAT_S8_USCALED:
+      for (j = 0; j < QUAD_SIZE; j++) {
+         int x = quad->input.x0 % TILE_SIZE + (j & 1);
+         int y = quad->input.y0 % TILE_SIZE + (j >> 1);
+         tile->data.stencil8[y][x] = data->stencilVals[j];
+      }
+      break;
+
    default:
       assert(0);
    }
@@ -661,20 +677,6 @@ static unsigned mask_count[16] =
 
 
 
-/** helper to get number of Z buffer bits */
-static unsigned
-get_depth_bits(struct quad_stage *qs)
-{
-   struct pipe_surface *zsurf = qs->softpipe->framebuffer.zsbuf;
-   if (zsurf)
-      return util_format_get_component_bits(zsurf->format,
-                                            UTIL_FORMAT_COLORSPACE_ZS, 0);
-   else
-      return 0;
-}
-
-
-
 /**
  * General depth/stencil test function.  Used when there's no fast-path.
  */
@@ -693,9 +695,8 @@ depth_test_quads_fallback(struct quad_stage *qs,
       nr = alpha_test_quads(qs, quads, nr);
    }
 
-   if (get_depth_bits(qs) > 0 &&
-       (qs->softpipe->depth_stencil->depth.enabled ||
-        qs->softpipe->depth_stencil->stencil[0].enabled)) {
+   if (qs->softpipe->depth_stencil->depth.enabled ||
+       qs->softpipe->depth_stencil->stencil[0].enabled) {
 
       data.ps = qs->softpipe->framebuffer.zsbuf;
       data.format = data.ps->format;
@@ -794,8 +795,7 @@ choose_depth_test(struct quad_stage *qs,
 
    boolean alpha = qs->softpipe->depth_stencil->alpha.enabled;
 
-   boolean depth = (get_depth_bits(qs) > 0 &&
-                    qs->softpipe->depth_stencil->depth.enabled);
+   boolean depth = qs->softpipe->depth_stencil->depth.enabled;
 
    unsigned depthfunc = qs->softpipe->depth_stencil->depth.func;
 
-- 
2.30.2