[Mesa-dev] [PATCH 3/9] glsl: Create a _mesa_shader_stage_to_abbrev() function.

[Kenneth Graunke]

This is similar to _mesa_shader_stage_to_string(), but returns "VS"
instead of "vertex".

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/glsl/glsl_parser_extras.cpp | 17 +++++++++++++++++
 src/glsl/glsl_parser_extras.h   |  3 +++
 2 files changed, 20 insertions(+)

diff --git a/src/glsl/glsl_parser_extras.cpp b/src/glsl/glsl_parser_extras.cpp
index ccdf031..0334e4a 100644
--- a/src/glsl/glsl_parser_extras.cpp
+++ b/src/glsl/glsl_parser_extras.cpp
@@ -376,6 +376,23 @@ _mesa_shader_stage_to_string(unsigned stage)
    return "unknown";
 }
 
+/**
+ * Translate a gl_shader_stage to a shader stage abbreviation (VS, GS, FS)
+ * for debug printouts and error messages.
+ */
+const char *
+_mesa_shader_stage_to_abbrev(unsigned stage)
+{
+   switch (stage) {
+   case MESA_SHADER_VERTEX:   return "VS";
+   case MESA_SHADER_FRAGMENT: return "FS";
+   case MESA_SHADER_GEOMETRY: return "GS";
+   }
+
+   assert(!"Should not get here.");
+   return "unknown";
+}
+
 /* This helper function will append the given message to the shader's
    info log and report it via GL_ARB_debug_output. Per that extension,
    'type' is one of the enum values classifying the message, and
diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index 843fdae..6861fac 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -576,6 +576,9 @@ extern "C" {
 extern const char *
 _mesa_shader_stage_to_string(unsigned stage);
 
+extern const char *
+_mesa_shader_stage_to_abbrev(unsigned stage);
+
 extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
                       const struct gl_extensions *extensions, struct gl_context *gl_ctx);
 
-- 
2.2.2