st/glsl_to_tgsi: add st_get_program_binary_driver_sha1() helper

This will be used by ARB_get_program_binary.

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

src/mesa/state_tracker/st_shader_cache.c

@@ -30,6 +30,12 @@
 #include "program/ir_to_mesa.h"
 #include "util/u_memory.h"
 
+void
+st_get_program_binary_driver_sha1(struct gl_context *ctx, uint8_t *sha1)
+{
+   disk_cache_compute_key(ctx->Cache, NULL, 0, sha1);
+}
+
 static void
 write_stream_out_to_cache(struct blob *blob,
                           struct pipe_shader_state *tgsi)

src/mesa/state_tracker/st_shader_cache.h

@@ -32,6 +32,9 @@
 extern "C" {
 #endif
 
+void
+st_get_program_binary_driver_sha1(struct gl_context *ctx, uint8_t *sha1);
+
 void
 st_serialise_tgsi_program(struct gl_context *ctx, struct gl_program *prog);