[Mesa-dev] [PATCH 07/15] mesa: Add error condition for using compressed internalformat in glTexStorage3D()

[Ian Romanick]

On 07/29/2014 05:02 PM, Jason Ekstrand wrote:
> 
> 
> 
> On Fri, Jun 6, 2014 at 4:57 PM, Anuj Phogat <anuj.phogat at gmail.com
> <mailto:anuj.phogat at gmail.com>> wrote:
> 
>     Fixes gles3 Khronos CTS test: texture_storage_texture_internal_formats
> 
>     Cc: <mesa-stable at lists.freedesktop.org
>     <mailto:mesa-stable at lists.freedesktop.org>>
>     Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com
>     <mailto:anuj.phogat at gmail.com>>
>     ---
>      src/mesa/main/texstorage.c | 18 ++++++++++++++++++
>      1 file changed, 18 insertions(+)
> 
>     diff --git a/src/mesa/main/texstorage.c b/src/mesa/main/texstorage.c
>     index 44b5374..897d589 100644
>     --- a/src/mesa/main/texstorage.c
>     +++ b/src/mesa/main/texstorage.c
>     @@ -41,6 +41,7 @@
>      #include "texstorage.h"
>      #include "textureview.h"
>      #include "mtypes.h"
>     +#include "glformats.h"
> 
> 
> 
>     @@ -301,6 +302,23 @@ tex_storage_error_check(struct gl_context *ctx,
>     GLuint dims, GLenum target,
>            return GL_TRUE;
>         }
> 
>     +   /* From section 3.8.6, page 146 of OpenGL ES 3.0 spec:
>     +    *
>     +    *    "The ETC2/EAC texture compression algorithm supports only
>     +    *     two-dimensional images. If internalformat is an ETC2/EAC
>     format,
>     +    *     CompressedTexImage3D will generate an INVALID_OPERATION
>     error if
>     +    *     target is not TEXTURE_2D_ARRAY."
>     +    *
>     +    * This should also be applicable for glTexStorage3D().
>     +    */
>     +   if (_mesa_is_compressed_format(ctx, internalformat)
>     +       && !_mesa_target_can_be_compressed(ctx, target,
>     internalformat)) {
>     +      _mesa_error(ctx, _mesa_is_desktop_gl(ctx)?
>     +                  GL_INVALID_ENUM : GL_INVALID_OPERATION,
>     +                  "glTexStorage3D(internalformat = %s)",
>     +                  _mesa_lookup_enum_by_nr(internalformat));
>     +   }
> 
> 
> It seems to me as if the mesa_target_can_be_compressed function
> completely disallows 3D texture formats, but the spec implies that they
> are allowed in some cases.  What's going on here?

It is possible to have a compressed format that supports 3D, but, of the
formats that Mesa supports, none do.  I believe
NV_texture_compression_vtc and KHR_texture_compression_astc_hdr are the
only ones.

> --Jason Ekstrand
> 
>     +
>         /* levels check */
>         if (levels < 1) {
>            _mesa_error(ctx, GL_INVALID_VALUE, "glTexStorage%uD(levels < 1)",
>     --
>     1.8.3.1
> 
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