Mesa (master): tgsi: support parsing texture offsets from text tgsi shaders

[Ilia Mirkin]

Module: Mesa
Branch: master
Commit: 12d97fb7c100059d9aa37e1b6331ee1cfe977aa6
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=12d97fb7c100059d9aa37e1b6331ee1cfe977aa6

Author: Ilia Mirkin <imirkin at alum.mit.edu>
Date:   Wed May  7 21:15:12 2014 -0400

tgsi: support parsing texture offsets from text tgsi shaders

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
Reviewed-by: Roland Scheidegger <sroland at vmware.com>

---

 src/gallium/auxiliary/tgsi/tgsi_text.c |   53 +++++++++++++++++++++++++++++---
 1 file changed, 48 insertions(+), 5 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_text.c b/src/gallium/auxiliary/tgsi/tgsi_text.c
index 2b2e7d5..7e50d8d 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_text.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_text.c
@@ -735,8 +735,9 @@ parse_dst_operand(
 static boolean
 parse_optional_swizzle(
    struct translate_ctx *ctx,
-   uint swizzle[4],
-   boolean *parsed_swizzle )
+   uint *swizzle,
+   boolean *parsed_swizzle,
+   int components)
 {
    const char *cur = ctx->cur;
 
@@ -748,7 +749,7 @@ parse_optional_swizzle(
 
       cur++;
       eat_opt_white( &cur );
-      for (i = 0; i < 4; i++) {
+      for (i = 0; i < components; i++) {
          if (uprcase( *cur ) == 'X')
             swizzle[i] = TGSI_SWIZZLE_X;
          else if (uprcase( *cur ) == 'Y')
@@ -816,7 +817,7 @@ parse_src_operand(
 
    /* Parse optional swizzle.
     */
-   if (parse_optional_swizzle( ctx, swizzle, &parsed_swizzle )) {
+   if (parse_optional_swizzle( ctx, swizzle, &parsed_swizzle, 4 )) {
       if (parsed_swizzle) {
          src->Register.SwizzleX = swizzle[0];
          src->Register.SwizzleY = swizzle[1];
@@ -839,6 +840,35 @@ parse_src_operand(
 }
 
 static boolean
+parse_texoffset_operand(
+   struct translate_ctx *ctx,
+   struct tgsi_texture_offset *src )
+{
+   uint file;
+   uint swizzle[3];
+   boolean parsed_swizzle;
+   struct parsed_bracket bracket;
+
+   if (!parse_register_src(ctx, &file, &bracket))
+      return FALSE;
+
+   src->File = file;
+   src->Index = bracket.index;
+
+   /* Parse optional swizzle.
+    */
+   if (parse_optional_swizzle( ctx, swizzle, &parsed_swizzle, 3 )) {
+      if (parsed_swizzle) {
+         src->SwizzleX = swizzle[0];
+         src->SwizzleY = swizzle[1];
+         src->SwizzleZ = swizzle[2];
+      }
+   }
+
+   return TRUE;
+}
+
+static boolean
 match_inst(const char **pcur,
            unsigned *saturate,
            const struct tgsi_opcode_info *info)
@@ -904,7 +934,7 @@ parse_instruction(
       if (!parse_register_1d( ctx, &file, &index ))
          return FALSE;
 
-      if (parse_optional_swizzle( ctx, swizzle, &parsed_swizzle )) {
+      if (parse_optional_swizzle( ctx, swizzle, &parsed_swizzle, 4 )) {
          if (parsed_swizzle) {
             inst.Predicate.SwizzleX = swizzle[0];
             inst.Predicate.SwizzleY = swizzle[1];
@@ -1003,6 +1033,19 @@ parse_instruction(
 
    cur = ctx->cur;
    eat_opt_white( &cur );
+   for (i = 0; info->is_tex && *cur == ','; i++) {
+         cur++;
+         eat_opt_white( &cur );
+         ctx->cur = cur;
+         if (!parse_texoffset_operand( ctx, &inst.TexOffsets[i] ))
+            return FALSE;
+         cur = ctx->cur;
+         eat_opt_white( &cur );
+   }
+   inst.Texture.NumOffsets = i;
+
+   cur = ctx->cur;
+   eat_opt_white( &cur );
    if (info->is_branch && *cur == ':') {
       uint target;