On Mon, Jan 16, 2017 at 1:13 AM, Topi Pohjolainen <
topi.pohjolai...@gmail.com> wrote:
> Signed-off-by: Topi Pohjolainen <topi.pohjolai...@intel.com>
> ---
> src/mesa/drivers/dri/i965/intel_pixel_read.c | 16 ++++++++++++++--
> 1 file changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/src/mesa/drivers/dri/i965/intel_pixel_read.c
> b/src/mesa/drivers/dri/i965/intel_pixel_read.c
> index 2563897..ace94a0 100644
> --- a/src/mesa/drivers/dri/i965/intel_pixel_read.c
> +++ b/src/mesa/drivers/dri/i965/intel_pixel_read.c
> @@ -47,6 +47,19 @@
>
> #define FILE_DEBUG_FLAG DEBUG_PIXEL
>
> +static void
> +adjust_image_offset(const struct intel_renderbuffer *irb,
> + int *xoffset, int *yoffset)
> +{
> + unsigned x;
> + unsigned y;
> + intel_miptree_get_image_offset(irb->mt, irb->mt_level, irb->mt_layer,
> + &x, &y);
> +
> + *xoffset += x;
> + *yoffset += y;
> +}
> +
> /**
> * \brief A fast path for glReadPixels
> *
> @@ -153,8 +166,7 @@ intel_readpixels_tiled_memcpy(struct gl_context * ctx,
> return false;
> }
>
> - xoffset += irb->mt->level[irb->mt_level].
> slice[irb->mt_layer].x_offset;
> - yoffset += irb->mt->level[irb->mt_level].
> slice[irb->mt_layer].y_offset;
> + adjust_image_offset(irb, &xoffset, &yoffset);
>
We do this a lot more places than just readpixels. Maybe we want to just
add a intel_miptree_get_texel_xy_offset helper that takes a miptree, level,
slice, and x/y and returns the total x/y. In any case, we really should
make such a helper a bit more global and use it all of the other random
places we do this calculation such as texsubimage_tiled_memcpy.
>
> dst_pitch = _mesa_image_row_stride(pack, width, format, type);
>
> --
> 2.5.5
>
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