mesa: expose dimension check for glTex*Storage functions

This is done so that following patch can use it to verify dimensions
for multisample variants of glTex*Storage.

v2: move function to header, use bool instead GLboolean
v3: small changes, cleanup

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Timothy Arceri <t_arceri@yahoo.com.au>

1 files changed, 21 insertions, 0 deletions

diff --git a/src/mesa/main/texstorage.h b/src/mesa/main/texstorage.h
index 6f5495f..033ecb7 100644
--- a/src/mesa/main/texstorage.h
+++ b/src/mesa/main/texstorage.h
@@ -38,6 +38,27 @@ _mesa_texture_storage(struct gl_context *ctx, GLuint dims,
                       GLenum internalformat, GLsizei width,
                       GLsizei height, GLsizei depth, bool dsa);
 
+/**
+ * Texture width, height and depth check shared with the
+ * multisample variants of TexStorage functions.
+ *
+ * From OpenGL 4.5 Core spec, page 260 (section 8.19)
+ *
+ *     "An INVALID_VALUE error is generated if width, height, depth
+ *     or levels are less than 1, for commands with the corresponding
+ *     parameters."
+ *
+ * (referring to TextureStorage* commands, these also match values
+ * specified for OpenGL ES 3.1.)
+ */
+static inline bool
+_mesa_valid_tex_storage_dim(GLsizei width, GLsizei height, GLsizei depth)
+{
+   if (width < 1 || height < 1 || depth < 1)
+      return false;
+   return true;
+}
+
 /*@}*/
 
 /**