diff options
Diffstat (limited to 'src/gallium/drivers/radeonsi/r600_blit.c')
| -rw-r--r-- | src/gallium/drivers/radeonsi/r600_blit.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/r600_blit.c b/src/gallium/drivers/radeonsi/r600_blit.c index fef4cccb8e6..483596e37dd 100644 --- a/src/gallium/drivers/radeonsi/r600_blit.c +++ b/src/gallium/drivers/radeonsi/r600_blit.c @@ -430,6 +430,21 @@ static void r600_compressed_to_blittable(struct pipe_resource *tex, rtex->surface.level[0].npix_y = util_format_get_nblocksy(orig->format, orig->npix0_y); rtex->surface.level[level].npix_x = util_format_get_nblocksx(orig->format, orig->npix_x); rtex->surface.level[level].npix_y = util_format_get_nblocksy(orig->format, orig->npix_y); + + /* By dividing the dimensions by 4, we effectively decrement + * last_level by 2, therefore the last 2 mipmap levels disappear and + * aren't blittable. Note that the last 3 mipmap levels (4x4, 2x2, + * 1x1) have equal slice sizes, which is an important assumption + * for this to work. + * + * In order to make the last 2 mipmap levels blittable, we have to + * add the slice size of the last mipmap level to the texture + * address, so that even though the hw thinks it reads last_level-2, + * it will actually read last_level-1, and if we add the slice size*2, + * it will read last_level. That's how this workaround works. + */ + if (level > rtex->resource.b.b.last_level-2) + rtex->mipmap_shift = level - (rtex->resource.b.b.last_level-2); } static void r600_change_format(struct pipe_resource *tex, @@ -463,6 +478,7 @@ static void r600_reset_blittable_to_orig(struct pipe_resource *tex, rtex->surface.level[0].npix_y = orig->npix0_y; rtex->surface.level[level].npix_x = orig->npix_x; rtex->surface.level[level].npix_y = orig->npix_y; + rtex->mipmap_shift = 0; } static void r600_resource_copy_region(struct pipe_context *ctx, |