graw: Export graw_save_surface_to_file().

Allows applications to dump surfaces to file without
referencing gallium/auxiliary entry points statically.

Existing test apps have been modified such that
they save the contents of the fronbuffer only
when the `-o' option's specified.

1 files changed, 39 insertions, 0 deletions

diff --git a/src/gallium/targets/graw-null/graw_util.c b/src/gallium/targets/graw-null/graw_util.c
index 531757f145..e5cf526d33 100644
--- a/src/gallium/targets/graw-null/graw_util.c
+++ b/src/gallium/targets/graw-null/graw_util.c
@@ -3,6 +3,7 @@
 #include "pipe/p_context.h"
 #include "pipe/p_state.h"
 #include "tgsi/tgsi_text.h"
+#include "util/u_debug.h"
 #include "util/u_memory.h"
 #include "state_tracker/graw.h"
 
@@ -51,3 +52,41 @@ graw_parse_fragment_shader(struct pipe_context *pipe,
    return pipe->create_fs_state(pipe, &state);
 }
 
+static char out_filename[256] = "";
+
+PUBLIC boolean
+graw_parse_args(int *argi,
+                int argc,
+                char *argv[])
+{
+   if (strcmp(argv[*argi], "-o") == 0) {
+      if (*argi + 1 >= argc) {
+         return FALSE;
+      }
+
+      strncpy(out_filename, argv[*argi + 1], sizeof(out_filename) - 1);
+      out_filename[sizeof(out_filename) - 1] = '\0';
+      *argi += 2;
+      return TRUE;
+   }
+
+   return FALSE;
+}
+
+PUBLIC boolean
+graw_save_surface_to_file(struct pipe_context *pipe,
+                          struct pipe_surface *surface,
+                          const char *filename)
+{
+   if (!filename || !*filename) {
+      filename = out_filename;
+      if (!filename || !*filename) {
+         return FALSE;
+      }
+   }
+
+   /* XXX: Make that working in release builds.
+    */
+   debug_dump_surface_bmp(pipe, filename, surface);
+   return TRUE;
+}