mesa: move gl_external_samplers() to program.[ch]

The function is only called from a couple places.  It doesn't make
sense to have it in mtypes.h

Reviewed-by: Nicolai Hähnle <[email protected]>

2 files changed, 22 insertions, 0 deletions

diff --git a/src/mesa/program/program.c b/src/mesa/program/program.c
index faf5b7fa28a..220efc35394 100644
--- a/src/mesa/program/program.c
+++ b/src/mesa/program/program.c
@@ -39,6 +39,7 @@
 #include "prog_cache.h"
 #include "prog_parameter.h"
 #include "prog_instruction.h"
+#include "util/bitscan.h"
 #include "util/ralloc.h"
 #include "util/u_atomic.h"
 
@@ -547,3 +548,19 @@ _mesa_get_min_invocations_per_fragment(struct gl_context *ctx,
    }
    return 1;
 }
+
+
+GLbitfield
+gl_external_samplers(const struct gl_program *prog)
+{
+   GLbitfield external_samplers = 0;
+   GLbitfield mask = prog->SamplersUsed;
+
+   while (mask) {
+      int idx = u_bit_scan(&mask);
+      if (prog->sh.SamplerTargets[idx] == TEXTURE_EXTERNAL_INDEX)
+         external_samplers |= (1 << idx);
+   }
+
+   return external_samplers;
+}
diff --git a/src/mesa/program/program.h b/src/mesa/program/program.h
index 0e105c35fc2..376da7b2d41 100644
--- a/src/mesa/program/program.h
+++ b/src/mesa/program/program.h
@@ -158,6 +158,11 @@ _mesa_shader_stage_to_program(unsigned stage)
    return GL_VERTEX_PROGRAM_ARB;
 }
 
+
+GLbitfield
+gl_external_samplers(const struct gl_program *prog);
+
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif