mesa: Dynamically allocate the storage for program local parameters.

The array was 64kb per struct gl_program, plus we statically stored a copy
of one on disk for _mesa_DummyProgram.  Given that most struct gl_programs
we generate are for GLSL shaders that don't have local parameters, this
was a waste.

Since you can store and fetch parameters beyond what the program actually
uses, we do have to do a late allocation if necessary at
GetProgramLocalParameter time.

Reduces peak memory usage in the dota2 trace I made by 76MB (4.5%)

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mesa/main/arbprogram.c b/src/mesa/main/arbprogram.c
index 51a2993..8bd3f0b 100644
--- a/src/mesa/main/arbprogram.c
+++ b/src/mesa/main/arbprogram.c
@@ -265,6 +265,12 @@ get_local_param_pointer(struct gl_context *ctx, const char *func,
       return GL_FALSE;
    }
 
+   if (!prog->LocalParams) {
+      prog->LocalParams = calloc(maxParams, sizeof(float[4]));
+      if (!prog->LocalParams)
+         return GL_FALSE;
+   }
+
    *param = prog->LocalParams[index];
    return GL_TRUE;
 }