mesa: fix fallthrough in glformats

Before 908f817918fb this would fallthrough to GL_INVALID_OPERATION
if the validation condition was not met. But since that change it
will now only return GL_INVALID_OPERATION if
!_mesa_has_EXT_texture_compression_bptc(ctx) is true. This seems
unintended.

Here we fix up the fallthrough and add the fallthrough comment so
this doesn't happen again.

Fixes: 908f817918fb ("mesa: expose EXT_texture_compression_bptc in GLES")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3005
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5705>

diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
index dfff4a21f0418afa3652c1f25783fe3df08916b2..66b29ede67a1bb364734a221e2741a86f3730ea6 100644 (file)
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -3059,14 +3059,15 @@ _mesa_gles_error_check_format_and_type(const struct gl_context *ctx,
             if (ctx->Version <= 20)
                return GL_INVALID_OPERATION;
             break;
-         case GL_RGB:
-            if (_mesa_has_OES_texture_float(ctx) && internalFormat == format)
-               break;
          case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
          case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
             if (!_mesa_has_EXT_texture_compression_bptc(ctx))
                return GL_INVALID_OPERATION;
             break;
+         case GL_RGB:
+            if (_mesa_has_OES_texture_float(ctx) && internalFormat == format)
+               break;
+            /* fallthrough */
          default:
             return GL_INVALID_OPERATION;
          }