fix incorrect sampler numbering/indexing.

All samplers indexes were zero.

cherry-picked from master (b6fb0940c226373ac235a5d327d3fcfd742bc6b9)

1 files changed, 13 insertions, 7 deletions

diff --git a/src/mesa/shader/prog_parameter.c b/src/mesa/shader/prog_parameter.c
index 0b61bac6961..75cf5023df1 100644
--- a/src/mesa/shader/prog_parameter.c
+++ b/src/mesa/shader/prog_parameter.c
@@ -283,25 +283,31 @@ _mesa_add_uniform(struct gl_program_parameter_list *paramList,
  * \param name  uniform's name
  * \param datatype  GL_SAMPLER_2D, GL_SAMPLER_2D_RECT_ARB, etc.
  * \param index  the sampler number (as seen in TEX instructions)
+ * \return  sampler index (starting at zero) or -1 if error
  */
 GLint
 _mesa_add_sampler(struct gl_program_parameter_list *paramList,
-                  const char *name, GLenum datatype, GLuint index)
+                  const char *name, GLenum datatype)
 {
    GLint i = _mesa_lookup_parameter_index(paramList, -1, name);
    if (i >= 0 && paramList->Parameters[i].Type == PROGRAM_SAMPLER) {
       ASSERT(paramList->Parameters[i].Size == 1);
       ASSERT(paramList->Parameters[i].DataType == datatype);
-      ASSERT(paramList->ParameterValues[i][0] == index);
       /* already in list */
-      return i;
+      return (GLint) paramList->ParameterValues[i][0];
    }
    else {
-      GLfloat indexf = index;
       const GLint size = 1; /* a sampler is basically a texture unit number */
-      i = _mesa_add_parameter(paramList, PROGRAM_SAMPLER, name,
-                              size, datatype, &indexf, NULL);
-      return i;
+      GLfloat value;
+      GLint numSamplers = 0;
+      for (i = 0; i < paramList->NumParameters; i++) {
+         if (paramList->Parameters[i].Type == PROGRAM_SAMPLER)
+            numSamplers++;
+      }
+      value = (GLfloat) numSamplers;
+      (void) _mesa_add_parameter(paramList, PROGRAM_SAMPLER, name,
+                                 size, datatype, &value, NULL);
+      return numSamplers;
    }
 }