diff options
| -rw-r--r-- | src/mesa/main/formatquery.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/mesa/main/formatquery.c b/src/mesa/main/formatquery.c index 03473ad460d..60d8b71b0d2 100644 --- a/src/mesa/main/formatquery.c +++ b/src/mesa/main/formatquery.c @@ -523,6 +523,43 @@ _is_resource_supported(struct gl_context *ctx, GLenum target, return true; } +static bool +_is_internalformat_supported(struct gl_context *ctx, GLenum target, + GLenum internalformat) +{ + /* From the ARB_internalformat_query2 specification: + * + * "- INTERNALFORMAT_SUPPORTED: If <internalformat> is an internal format + * that is supported by the implementation in at least some subset of + * possible operations, TRUE is written to <params>. If <internalformat> + * if not a valid token for any internal format usage, FALSE is returned. + * + * <internalformats> that must be supported (in GL 4.2 or later) include + * the following: + * - "sized internal formats" from Table 3.12, 3.13, and 3.15, + * - any specific "compressed internal format" from Table 3.14, + * - any "image unit format" from Table 3.21. + * - any generic "compressed internal format" from Table 3.14, if the + * implementation accepts it for any texture specification commands, and + * - unsized or base internal format, if the implementation accepts + * it for texture or image specification. + */ + GLint buffer[1]; + + /* At this point a internalformat is valid if it is valid as a texture or + * as a renderbuffer format. The checks are different because those methods + * return different values when passing non supported internalformats */ + if (_mesa_base_tex_format(ctx, internalformat) < 0 && + _mesa_base_fbo_format(ctx, internalformat) == 0) + return false; + + /* Let the driver have the final word */ + ctx->Driver.QueryInternalFormat(ctx, target, internalformat, + GL_INTERNALFORMAT_SUPPORTED, buffer); + + return (buffer[0] == GL_TRUE); +} + /* default implementation of QueryInternalFormat driverfunc, for * drivers not implementing ARB_internalformat_query2. */ @@ -576,6 +613,7 @@ _mesa_GetInternalformativ(GLenum target, GLenum internalformat, GLenum pname, _set_default_response(pname, buffer); if (!_is_target_supported(ctx, target) || + !_is_internalformat_supported(ctx, target, internalformat) || !_is_resource_supported(ctx, target, internalformat, pname)) goto end; |