From: Dave Airlie <airlied@redhat.com>
Date: Fri, 6 Jan 2012 12:21:54 +0000 (+0000)
Subject: tgsi_scan: add support to count number of output clip distances
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f7e3e46f72fffe4b83cd3f922173ff28e9ab9c7c;p=mesa.git

tgsi_scan: add support to count number of output clip distances

Just add support to the scanner to count the number of clip distances.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index 97d74e4a9f9..e4e9c032e02 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -191,6 +191,10 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
                   info->output_semantic_index[reg] = (ubyte)fulldecl->Semantic.Index;
                   info->num_outputs++;
 
+                  if (procType == TGSI_PROCESSOR_VERTEX &&
+                      fulldecl->Semantic.Name == TGSI_SEMANTIC_CLIPDIST) {
+                     info->num_written_clipdistance += util_bitcount(fulldecl->Declaration.UsageMask);
+                  }
                   /* extra info for special outputs */
                   if (procType == TGSI_PROCESSOR_FRAGMENT &&
                       fulldecl->Semantic.Name == TGSI_SEMANTIC_POSITION)
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index 482c106ae79..235e6a3fae0 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -75,6 +75,7 @@ struct tgsi_shader_info
    boolean pixel_center_integer;
    boolean color0_writes_all_cbufs;
 
+   unsigned num_written_clipdistance;
    /**
     * Bitmask indicating which register files are accessed with
     * indirect addressing.  The bits are (1 << TGSI_FILE_x), etc.