From: Antia Puentes <apuen...@igalia.com>
From the ARB_internalformat_query2 specification:
"The INTERNALFORMAT_SUPPORTED <pname> can be used to determine if
the internal format is supported, and the other <pnames> are defined
in terms of whether or not the format is supported."
---
src/mesa/main/formatquery.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/src/mesa/main/formatquery.c b/src/mesa/main/formatquery.c
index 91eb6b7..4ce1709 100644
--- a/src/mesa/main/formatquery.c
+++ b/src/mesa/main/formatquery.c
@@ -522,6 +522,39 @@ _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];
+
+ if (_mesa_base_tex_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.
*/
@@ -574,6 +607,7 @@ _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;
--
2.5.3
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
