[Mesa-dev] [PATCH] Mesa: Fix error code for glTexImage3D in GLES

[Kenneth Graunke]

On Wednesday, December 21, 2016 9:05:27 AM PST Randy Xu wrote:
> From the OGLES 3.2 spec, Section 8.5 Texture Image Specification, page 158:
>  "An INVALID_OPERATION error is generated if a combination of
>   values for format, type, and internalformat is specified that is
>   not listed as a valid combination in tables 8.2 or 8.3."
> It means that TexImage3D should return GL_INVALID_OPERATION if the internal
> format is DEPTH_COMPONENT, DEPTH_-STENCIL or STENCIL_INDEX.
> 
> The current code returns INVALID_ENUM as _mesa_error_check_format_and_type is
> also used by glReadPixels and the GL specification defines
>  "INVALID_ENUM is generated if format is DEPTH_STENCIL and type is not
>   UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_- REV".
> 
> This patch only impacts GLES, which can generate GL_INVALID_OPERATION because
> glReadPixels cannot be used to read depth or stencil buffer.
> Fixes dEQP-GLES3.functional.negative_api.texture.teximage3d.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99076
> Signed-off-by: Randy Xu <randy.xu at intel.com>
> ---
>  src/mesa/main/glformats.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
> index a95909c..3070db9 100644
> --- a/src/mesa/main/glformats.c
> +++ b/src/mesa/main/glformats.c
> @@ -2087,6 +2087,13 @@ _mesa_error_check_format_and_type(const struct gl_context *ctx,
>           else if (ctx->Extensions.ARB_depth_buffer_float &&
>               type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
>              return GL_NO_ERROR;
> +         //From the OpenGL ES 3.2 spec, Section 8.5 Texture Image
> +         // Specification, page 158:
> +         // An INVALID_OPERATION error is generated if a combination of
> +         // values for format, type, and internalformat is specified that
> +         // is not listed as a valid combination in tables 8.2 or 8.3.
> +         else if (!_mesa_is_desktop_gl(ctx))
> +            return GL_INVALID_OPERATION;
>           else
>              return GL_INVALID_ENUM;
>  
> 

There is a bug in dEQP related to this test:

    https://android-review.googlesource.com/#/c/316475/

We already landed the equivalent fix for dEQP-GLES31 version, but
apparently the test exists in dEQP-GLES3 as well.

After applying that patch, the test passes, with no change to Mesa.

--Ken
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