Show truncation in fixed variables explicitly instead of showing 0s

qrenderdoc/Code/BufferFormatter.cpp

@@ -2430,6 +2430,7 @@ static void FillShaderVarData(ShaderVariable &var, const ShaderConstant &elem, c
   {
     var.name = elem.name;
     var.value = ShaderValue();
+    var.flags |= ShaderVariableFlags::Truncated;
     return;
   }
 
@@ -3120,6 +3121,14 @@ QString TypeString(const ShaderVariable &v)
 template <typename el>
 static QString RowValuesToString(int cols, ShaderVariableFlags flags, el x, el y, el z, el w)
 {
+  if(flags & ShaderVariableFlags::Truncated)
+  {
+    QString ret = lit("---");
+    for(int i = 1; i < cols; i++)
+      ret += lit(", ---");
+    return ret;
+  }
+
   const bool hex = bool(flags & ShaderVariableFlags::HexDisplay);
 
   if(bool(flags & ShaderVariableFlags::BinaryDisplay))

renderdoc/api/replay/renderdoc_tostr.inl

@@ -1124,6 +1124,7 @@ rdcstr DoStringise(const ShaderVariableFlags &el)
     STRINGISE_BITFIELD_CLASS_BIT(R10G10B10A2);
     STRINGISE_BITFIELD_CLASS_BIT(UNorm);
     STRINGISE_BITFIELD_CLASS_BIT(SNorm);
+    STRINGISE_BITFIELD_CLASS_BIT(Truncated);
   }
   END_BITFIELD_STRINGISE();
 }

renderdoc/api/replay/replay_enums.h

@@ -4311,6 +4311,10 @@ displayed
 .. data:: SNorm
 
   This value should be treated as signed normalised floating point values when interpreting.
+
+.. data:: Truncated
+
+  This value was truncated when reading - the available range was exhausted.
 )");
 enum class ShaderVariableFlags : uint32_t
 {
@@ -4323,6 +4327,7 @@ enum class ShaderVariableFlags : uint32_t
   R10G10B10A2 = 0x0020,
   UNorm = 0x0040,
   SNorm = 0x0080,
+  Truncated = 0x0100,
 };
 
 BITMASK_OPERATORS(ShaderVariableFlags);