mesa: add ATI_texture_compression_3dc

LUMINANCE_ALPHA_LATC2 = LUMINANCE_ALPHA_3DC, so this is easy.

Note that there is no specification for 3DC, just a few white papers
from ATI.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index 6ec66100e7a..2a3037f6189 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -522,6 +522,15 @@ _mesa_base_tex_format( struct gl_context *ctx, GLint internalFormat )
       }
    }
 
+   if (ctx->Extensions.ATI_texture_compression_3dc) {
+      switch (internalFormat) {
+      case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
+         return GL_LUMINANCE_ALPHA;
+      default:
+         ; /* fallthrough */
+      }
+   }
+
    return -1; /* error */
 }