[Mesa-dev] [PATCH v4] i965: Fix calculation of the image height at start level

[Antía Puentes]

Ping. This patch fixes a significant amount of CTS tests and
it will be nice to have it reviewed.
On sáb, 2016-09-03 at 03:04 +0200, Antia Puentes wrote:
> - Fixes CTS tests:
> 
> * GL44-CTS.shader_image_size.advanced-nonMS-cs-float
> * GL44-CTS.shader_image_size.advanced-nonMS-cs-int
> * GL44-CTS.shader_image_size.advanced-nonMS-cs-uint
> * GL44-CTS.shader_image_size.advanced-nonMS-gs-float
> * GL44-CTS.shader_image_size.advanced-nonMS-gs-int
> * GL44-CTS.shader_image_size.advanced-nonMS-gs-uint
> * GL44-CTS.shader_image_size.advanced-nonMS-tes-float
> * GL44-CTS.shader_image_size.advanced-nonMS-tes-int
> * GL44-CTS.shader_image_size.advanced-nonMS-tes-uint
> * GL44-CTS.shader_image_size.advanced-nonMS-vs-float
> * GL44-CTS.shader_image_size.advanced-nonMS-vs-int
> * GL44-CTS.shader_image_size.advanced-nonMS-vs-uint
> 
> v1: (written by Dave Airlie) Always shift height images for levels.
> Fixed the CTS test.
> 
> v2: Only shift height if the texture is not an 1D_ARRAY,
> it fixes assertion in GL44-CTS.texture_view.gettexparameter
> due to the original patch (Antia).
> 
> v3: Remove the loop. Do not shift height either for 1D textures.
> Use an explicit switch and add an assertion (levels == 0) for
> multisampled textures (Jason).
> 
> v4: Rectangle textures can not have levels either (Ilia Mirkin).
> 
> Signed-off-by: Dave Airlie <airlied at redhat.com>
> Signed-off-by: Antia Puentes <apuentes at igalia.com>
> ---
>  src/mesa/drivers/dri/i965/intel_tex_image.c | 27
> +++++++++++++++++++++------
>  1 file changed, 21 insertions(+), 6 deletions(-)
> 
> diff --git a/src/mesa/drivers/dri/i965/intel_tex_image.c
> b/src/mesa/drivers/dri/i965/intel_tex_image.c
> index 7affe08..65962eb 100644
> --- a/src/mesa/drivers/dri/i965/intel_tex_image.c
> +++ b/src/mesa/drivers/dri/i965/intel_tex_image.c
> @@ -47,12 +47,27 @@ intel_miptree_create_for_teximage(struct
> brw_context *brw,
>     DBG("%s\n", __func__);
>  
>     /* Figure out image dimensions at start level. */
> -   for (i = intelImage->base.Base.Level; i > 0; i--) {
> -      width <<= 1;
> -      if (height != 1)
> -         height <<= 1;
> -      if (intelObj->base.Target == GL_TEXTURE_3D)
> -         depth <<= 1;
> +   switch(intelObj->base.Target) {
> +   case GL_TEXTURE_2D_MULTISAMPLE:
> +   case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
> +   case GL_TEXTURE_RECTANGLE:
> +      assert(intelImage->base.Base.Level == 0);
> +      break;
> +   case GL_TEXTURE_3D:
> +      depth <<= intelImage->base.Base.Level;
> +      /* Fall through */
> +   case GL_TEXTURE_2D:
> +   case GL_TEXTURE_2D_ARRAY:
> +   case GL_TEXTURE_CUBE_MAP:
> +   case GL_TEXTURE_CUBE_MAP_ARRAY:
> +      height <<= intelImage->base.Base.Level;
> +      /* Fall through */
> +   case GL_TEXTURE_1D:
> +   case GL_TEXTURE_1D_ARRAY:
> +      width <<= intelImage->base.Base.Level;
> +      break;
> +   default:
> +      unreachable("Unexpected target");
>     }
>  
>     /* Guess a reasonable value for lastLevel.  This is probably
> going
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