[waffle] [RFC] wflinfo.c: add GLSL version information

[Dylan Baker]

Signed-off-by: Dylan Baker <dylanx.c.baker at intel.com>
---

This returns an error on GLES 1.x, which is expected. Should we do
something to handle that differently or just return the
WFLINFO_GL_ERROR?

 src/utils/wflinfo.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/utils/wflinfo.c b/src/utils/wflinfo.c
index c2af4dc..433d0f9 100644
--- a/src/utils/wflinfo.c
+++ b/src/utils/wflinfo.c
@@ -207,6 +207,7 @@ enum {
     GL_VENDOR                              = 0x1F00,
     GL_RENDERER                            = 0x1F01,
     GL_VERSION                             = 0x1F02,
+    GL_SHADING_LANGUAGE_VERSION            = 0x8B8C,
     GL_EXTENSIONS                          = 0x1F03,
     GL_NUM_EXTENSIONS                      = 0x821D,
 };
@@ -549,6 +550,10 @@ print_wflinfo(const struct options *opts)
     if (glGetError() != GL_NO_ERROR || version_str == NULL) {
         version_str = "WFLINFO_GL_ERROR";
     }
+    const char *language_str = (const char *) glGetString(GL_SHADING_LANGUAGE_VERSION);
+    if (glGetError() != GL_NO_ERROR || language_str == NULL) {
+        language_str = "WFLINFO_GL_ERROR";
+    }
 
     const char *platform = enum_map_to_str(platform_map, opts->platform);
     assert(platform != NULL);
@@ -561,6 +566,7 @@ print_wflinfo(const struct options *opts)
     printf("OpenGL vendor string: %s\n", vendor);
     printf("OpenGL renderer string: %s\n", renderer);
     printf("OpenGL version string: %s\n", version_str);
+    printf("OpenGL shading language version string: %s\n", language_str);
 
     int version = parse_version(version_str);
 
-- 
2.1.3