Mesa (master): glsl: move stream layout max validation

[Timothy Arceri]

Module: Mesa
Branch: master
Commit: db3c36aedfa2e92c2cf1c17a096c1b5e7cd51c42
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=db3c36aedfa2e92c2cf1c17a096c1b5e7cd51c42

Author: Timothy Arceri <timothy.arceri at collabora.com>
Date:   Sat Nov 14 14:32:38 2015 +1100

glsl: move stream layout max validation

This validation is moved later so we can validate the
max value when compile time constant support is added in a
later patch.

Reviewed-by: Samuel Iglesias Gonsálvez <siglesias at igalia.com>
Reviewed-by: Emil Velikov <emil.velikov at collabora.com>

---

 src/glsl/ast_to_hir.cpp |   21 +++++++++++++++++++--
 src/glsl/ast_type.cpp   |   14 --------------
 2 files changed, 19 insertions(+), 16 deletions(-)

diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index 7104aa0..bb0db79 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -2522,6 +2522,21 @@ process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 }
 
 static bool
+validate_stream_qualifier(YYLTYPE *loc, struct _mesa_glsl_parse_state *state,
+                          unsigned stream)
+{
+   if (stream >= state->ctx->Const.MaxVertexStreams) {
+      _mesa_glsl_error(loc, state,
+                       "invalid stream specified %d is larger than "
+                       "MAX_VERTEX_STREAMS - 1 (%d).",
+                       stream, state->ctx->Const.MaxVertexStreams - 1);
+      return false;
+   }
+
+   return true;
+}
+
+static bool
 validate_binding_qualifier(struct _mesa_glsl_parse_state *state,
                            YYLTYPE *loc,
                            const glsl_type *type,
@@ -3036,7 +3051,8 @@ apply_layout_qualifier_to_variable(const struct ast_type_qualifier *qual,
        qual->flags.q.out && qual->flags.q.stream) {
       unsigned qual_stream;
       if (process_qualifier_constant(state, loc, "stream", qual->stream,
-                                     &qual_stream)) {
+                                     &qual_stream) &&
+          validate_stream_qualifier(loc, state, qual_stream)) {
          var->data.stream = qual_stream;
       }
    }
@@ -6517,7 +6533,8 @@ ast_interface_block::hir(exec_list *instructions,
 
    unsigned qual_stream;
    if (!process_qualifier_constant(state, &loc, "stream", this->layout.stream,
-                                   &qual_stream)) {
+                                   &qual_stream) ||
+       !validate_stream_qualifier(&loc, state, qual_stream)) {
       /* If the stream qualifier is invalid it doesn't make sense to continue
        * on and try to compare stream layouts on member variables against it
        * so just return early.
diff --git a/src/glsl/ast_type.cpp b/src/glsl/ast_type.cpp
index 79134c1..b107051 100644
--- a/src/glsl/ast_type.cpp
+++ b/src/glsl/ast_type.cpp
@@ -190,20 +190,6 @@ ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 
    if (state->stage == MESA_SHADER_GEOMETRY &&
        state->has_explicit_attrib_stream()) {
-      if (q.flags.q.stream && q.stream >= state->ctx->Const.MaxVertexStreams) {
-         _mesa_glsl_error(loc, state,
-                          "`stream' value is larger than MAX_VERTEX_STREAMS - 1 "
-                          "(%d > %d)",
-                          q.stream, state->ctx->Const.MaxVertexStreams - 1);
-      }
-      if (this->flags.q.explicit_stream &&
-          this->stream >= state->ctx->Const.MaxVertexStreams) {
-         _mesa_glsl_error(loc, state,
-                          "`stream' value is larger than MAX_VERTEX_STREAMS - 1 "
-                          "(%d > %d)",
-                          this->stream, state->ctx->Const.MaxVertexStreams - 1);
-      }
-
       if (!this->flags.q.explicit_stream) {
          if (q.flags.q.stream) {
             this->flags.q.stream = 1;