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, 10 insertions, 0 deletions

diff --git a/src/mesa/main/texformat.c b/src/mesa/main/texformat.c
index 521b9a04b71..5eabf2aa527 100644
--- a/src/mesa/main/texformat.c
+++ b/src/mesa/main/texformat.c
@@ -640,6 +640,16 @@ _mesa_choose_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_IF_SUPPORTED(MESA_FORMAT_LA_LATC2);
+            break;
+         default:
+            ; /* fallthrough */
+      }
+   }
+
    _mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()");
    return MESA_FORMAT_NONE;
 }