Intel Gen7 GPUs don't have native support for ETC2 formats. We store the
ETC2 images as RGBA in order to render them. This is a problem for
GetCompressed* functions that should return compressed pixel values but
return instead RGBA.
With these patches, we store the compressed image data in the main image
mipmap tree and we use a secondary mipmap tree to store the RGBA values
for the rendering. We perform a lazy update every time that the main
miptree changes.
Fix: KHR-GL46.direct_state_access.textures_compressed_subimage
Eleni Maria Stea (8):
i965: Removed assertions from intel_miptree_map_etc
i965: r8stencil_mt/needs_update renamed to shadow_mt/needs_update
i965: Faking the ETC2 compression on Gen < 8 GPUs using two miptrees.
i965: Update the shadow miptree from the main to fake the ETC2
compression
i965: Fixed the CopyImageSubData for ETC2 on Gen < 8
i965: Added support for ETC2 mipmaps
i965: Added support for ETC2 texture arrays on Gen7
i965: Enabled the OES_copy_image extension on Gen 7 GPUs
src/mesa/drivers/dri/i965/brw_draw.c | 3 +
.../drivers/dri/i965/brw_wm_surface_state.c | 35 +++-
src/mesa/drivers/dri/i965/intel_extensions.c | 18 +-
src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 168 +++++++++++++++---
src/mesa/drivers/dri/i965/intel_mipmap_tree.h | 24 ++-
src/mesa/drivers/dri/i965/intel_tex_image.c | 45 ++++-
src/mesa/main/texstore.c | 92 +++++-----
src/mesa/main/texstore.h | 9 +
8 files changed, 315 insertions(+), 79 deletions(-)
--
2.19.0
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